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Hail

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911:, with upwardly directed wind speeds as high as 110 mph (180 km/h), blows the forming hailstones up the cloud. As the hailstone ascends, it passes into areas of the cloud where the concentration of humidity and supercooled water droplets varies. The hailstone's growth rate changes depending on the variation in humidity and supercooled water droplets that it encounters. The accretion rate of these water droplets is another factor in the hailstone's growth. When the hailstone moves into an area with a high concentration of water droplets, it captures the latter and acquires a translucent layer. Should the hailstone move into an area where mostly water vapor is available, it acquires a layer of opaque white ice. 1670: 1575: 1666:. The hailstones, described as between the size of bumble bees and ping pong balls, were accompanied by rain and high winds. The hail fell in only the one area, leaving the surrounding area untouched. It fell for one and a half hours between 10:00 pm and 11:30 pm. A meteorologist for the National Weather Service in Boulder said, "It's a very interesting phenomenon. We saw the storm stall. It produced copious amounts of hail in one small area. It's a meteorological thing." Tractors used to clear the area filled more than 30 dump truck loads of hail. 904:. A cross-section through a large hailstone shows an onion-like structure. This means that the hailstone is made of thick and translucent layers, alternating with layers that are thin, white and opaque. Former theory suggested that hailstones were subjected to multiple descents and ascents, falling into a zone of humidity and refreezing as they were uplifted. This up and down motion was thought to be responsible for the successive layers of the hailstone. New research, based on theory as well as field study, has shown this is not necessarily true. 1288: 678: 1500: 1139: 1678:
these events prior to their occurrence. A fundamental problem in continuing research in this area is that, unlike hail diameter, hail depth is not commonly reported. The lack of data leaves researchers and forecasters in the dark when trying to verify operational methods. A cooperative effort between the University of Colorado and the National Weather Service is in progress. The joint project's goal is to enlist the help of the general public to develop a database of hail accumulation depths.
1687: 1638: 915: 1249: 889: 37: 1590:. Hail damage to roofs often goes unnoticed until further structural damage is seen, such as leaks or cracks. It is hardest to recognize hail damage on shingled roofs and flat roofs, but all roofs have their own hail damage detection problems. Metal roofs are fairly resistant to hail damage, but may accumulate cosmetic damage in the form of dents and damaged coatings. 947: 880:, high liquid-water content, great vertical extent, large water droplets, and where a good portion of the cloud layer is below freezing (0 Â°C; 32 Â°F). These types of strong updrafts can also indicate the presence of a tornado. The growth rate of hailstones is impacted by factors such as higher elevation, lower freezing zones, and wind shear. 1677:
Research focused on four individual days that accumulated more than 5.9 inches (15 cm) of hail in 30 minutes on the Colorado front range has shown that these events share similar patterns in observed synoptic weather, radar, and lightning characteristics, suggesting the possibility of predicting
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The size of hailstones is best determined by measuring their diameter with a ruler. In the absence of a ruler, hailstone size is often visually estimated by comparing its size to that of known objects, such as coins. Using objects such as hen's eggs, peas, and marbles for comparing hailstone sizes is
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that border the high-frequency hail regions of northern Argentina. The high frequency of hailstorms in these areas of South America is attributed to the region's orographic forcing of convection, combined with moisture transport from the Amazon and instability created by temperature contrasts between
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Hail is one of the most significant thunderstorm hazards to aircraft. When hailstones exceed 0.5 in (13 mm) in diameter, planes can be seriously damaged within seconds. The hailstones accumulating on the ground can also be hazardous to landing aircraft. Hail is a common nuisance to drivers
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is an example. This is the result of energy from the radar hitting hail and being deflected to the ground, where they deflect back to the hail and then to the radar. The energy took more time to go from the hail to the ground and back, as opposed to the energy that went directly from the hail to the
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in the cloud. Research shows that hail development in the upper levels of the storm is related to the evolution of VIL. VIL divided by the vertical extent of the storm, called VIL density, has a relationship with hail size, although this varies with atmospheric conditions and therefore is not highly
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Thus, a unique trajectory in the thunderstorm is sufficient to explain the layer-like structure of the hailstone. The only case in which multiple trajectories can be discussed is in a multicellular thunderstorm, where the hailstone may be ejected from the top of the "mother" cell and captured in the
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Narrow zones where hail accumulates on the ground in association with thunderstorm activity are known as hail streaks or hail swaths, which can be detectable by satellite after the storms pass by. Hailstorms normally last from a few minutes up to 15 minutes in duration. Accumulating hail storms can
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of dry air into strong thunderstorms over continents can increase the frequency of hail by promoting evaporational cooling, which lowers the freezing level of thunderstorm clouds, giving hail a larger volume to grow in. Accordingly, hail is less common in the tropics despite a much higher frequency
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Furthermore, the hailstone's speed depends on its position in the cloud's updraft and its mass. This determines the varying thicknesses of the layers of the hailstone. The accretion rate of supercooled water droplets onto the hailstone depends on the relative velocities between these water droplets
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Unlike ice pellets, hailstones are often layered and can be irregular and clumped together. Hail is composed of transparent ice or alternating layers of transparent and translucent ice at least 1 mm (0.039 in) thick, which are deposited upon the hailstone as it travels through the cloud,
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has a 1 in (2.5 cm) diameter threshold, effective January 2010, an increase over the previous threshold of 0.75 in (1.9 cm) hail. Other countries have different thresholds according to local sensitivity to hail; for instance, grape-growing areas could be adversely impacted by
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Hail occurs most frequently within continental interiors at mid-latitudes and is less common in the tropics, despite a much higher frequency of thunderstorms than in the mid-latitudes. Hail is also much more common along mountain ranges because mountains force horizontal winds upwards (known as
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Hail growth becomes vanishingly small when air temperatures fall below −30 Â°C (−22 Â°F), as supercooled water droplets become rare at these temperatures. Around thunderstorms, hail is most likely within the cloud at elevations above 20,000 ft (6,100 m). Between 10,000 ft
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The hailstone will keep rising in the thunderstorm until its mass can no longer be supported by the updraft. This may take at least 30 minutes, based on the force of the updrafts in the hail-producing thunderstorm, whose top is usually greater than 10 km high. It then falls toward the
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due to small air bubbles that become trapped in the stone during rapid freezing. These bubbles coalesce and escape during the "wet growth" mode, and the hailstone is more clear. The mode of growth for a hailstone can change throughout its development, and this can result in distinct layers in a
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Depths of up to 18 in (0.46 m) have been reported. A landscape covered in accumulated hail generally resembles one covered in accumulated snow and any significant accumulation of hail has the same restrictive effects as snow accumulation, albeit over a smaller area, on transport and
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of hail, or the speed at which hail is falling when it strikes the ground, varies. It is estimated that a hailstone of 1 cm (0.39 in) in diameter falls at a rate of 9 m/s (20 mph), while stones the size of 8 cm (3.1 in) in diameter fall at a rate of 48 m/s
983:(3,000 m) and 20,000 ft (6,100 m), 60% of hail is still within the thunderstorm, though 40% now lies within the clear air under the anvil. Below 10,000 ft (3,000 m), hail is equally distributed in and around a thunderstorm to a distance of 2 nmi (3.7 km). 996:), thereby intensifying the updrafts within thunderstorms and making hail more likely. The higher elevations also result in there being less time available for hail to melt before reaching the ground. One of the more common regions for large hail is across mountainous northern 1168:
accurate. Traditionally, hail size and probability can be estimated from radar data by computer using algorithms based on this research. Some algorithms include the height of the freezing level to estimate the melting of the hailstone and what would be left on the ground.
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On somewhat rare occasions, a thunderstorm can become stationary or nearly so while prolifically producing hail and significant depths of accumulation do occur; this tends to happen in mountainous areas, such as the July 29, 2010 case of a foot of hail accumulation in
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is a very useful tool to detect the presence of hail-producing thunderstorms. However, radar data has to be complemented by a knowledge of current atmospheric conditions which can allow one to determine if the current atmosphere is conducive to hail development.
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Hailstones can have layers of clear and cloudy ice if the hailstone encounters different temperature and liquid water content conditions in the thunderstorm. The conditions experienced by the hailstone can change as it passes horizontally across or near an
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imagery. Hailstones generally fall at higher speeds as they grow in size, though complicating factors such as melting, friction with air, wind, and interaction with rain and other hailstones can slow their descent through
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blanket the ground with over 2 in (5.1 cm) of hail, cause thousands to lose power, and bring down many trees. Flash flooding and mudslides within areas of steep terrain can be a concern with accumulating hail.
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Modern radar scans many angles around the site. Reflectivity values at multiple angles above ground level in a storm are proportional to the precipitation rate at those levels. Summing reflectivities in the
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and the hailstone itself. This means that generally the larger hailstones will form some distance from the stronger updraft, where they can pass more time growing. As the hailstone grows, it releases
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region of southern Argentina also sees frequent hailstorms, though this may be partially due to graupel (small hail) being counted as hail in this colder region. The triple border region between the
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meet, known as "Hail Alley". Hail in this region occurs between the months of March and October during the afternoon and evening hours, with the bulk of the occurrences from May through September.
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Hail is most common within continental interiors of the mid-latitudes, as hail formation is considerably more likely when the freezing level is below the altitude of 11,000 ft (3,400 m).
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unless parked in a garage or covered with a shielding material. Wheat, corn, soybeans, and tobacco are the most sensitive crops to hail damage. Hail is one of Canada's most expensive hazards.
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infrastructure. Accumulated hail can also cause flooding by blocking drains, and hail can be carried in the floodwater, turning into a snow-like slush which is deposited at lower elevations.
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which relates to the size of the hailstone. Within METAR code, GR is used to indicate larger hail, of a diameter of at least 0.25 in (6.4 mm). GR is derived from the French word
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of thunderstorms than in the mid-latitudes because the atmosphere over the tropics tends to be warmer over a much greater altitude. Hail in the tropics occurs mainly at higher elevations.
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also experiences significant hailstorms. Central Europe and southern Australia also experience a lot of hailstorms. Regions where hailstorms frequently occur are southern and western
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smaller hailstones. Hailstones can be very large or very small, depending on how strong the updraft is: weaker hailstorms produce smaller hailstones than stronger hailstorms (such as
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Hail can also undergo "dry growth", in which the latent heat release through freezing is not enough to keep the outer layer in a liquid state. Hail forming in this manner appears
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is North America's most hail-prone city with an average of nine to ten hailstorms per season. To the north of this area and also just downwind of the Rocky Mountains is the
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as "hail", which are aggregations of ice associated with thunderstorms, and therefore records of extreme characteristics of megacryometeors are not given as hail records.
761:(which consists of tiny, delicately crystalline flakes or needles), hailstones usually measure between 5 mm (0.2 in) and 15 cm (6 in) in diameter. The 2682:
Počakal, Damir; Večenaj, Ćœeljko; Ć talec, Janez (July 2009). "Hail characteristics of different regions in continental part of Croatia based on influence of orography".
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and falls to the ground. Although the diameter of hail is varied, in the United States, the average observation of damaging hail is between 2.5 cm (1 in) and
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ground while continuing to grow, based on the same processes, until it leaves the cloud. It will later begin to melt as it passes into air above freezing temperature.
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Example of a three-body spike: the weak triangular echoes (pointed by the arrow) behind the red and white thunderstorm core are related to hail inside the storm.
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Abshaev, M. T.; Abshaev, A. M.; Malkarova, A. M. (2012). "Estimation of antihail projects efficiency considering the tendency of hail climatology change".
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radar, and the echo is further away from the radar than the actual location of the hail on the same radial path, forming a cone of weaker reflectivities.
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Like other precipitation in cumulonimbus clouds, hail begins as water droplets. As the droplets rise and the temperature goes below freezing, they become
1613:. Hailstorms have been the cause of costly and deadly events throughout history. One of the earliest known incidents occurred around the 9th century in 3518: 1903: 2595:
Liu, Dongxia; Feng, Guili; Wu, Shujun (February 2009). "The characteristics of cloud-to-ground lightning activity in hailstorms over northern China".
2843: 931:(i.e. more adhesive), so a single hailstone may grow by collision with other smaller hailstones, forming a larger entity with an irregular shape. 3168: 2396: 1940: 3692: 2842:
Beal, Alexandra; Hallak, Ricardo; Martins, Leila D.; Martins, Jorge A.; Biz, Guilherme; Rudke, Anderson P.; Tarley, Cesar R. T. (2020-04-01).
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properties of weather radar returns have been analyzed to differentiate between hail and heavy rain. The use of differential reflectivity (
1817: 4084: 3601: 3131: 730:(American English "sleet"), though the two are often confused. It consists of balls or irregular lumps of ice, each of which is called a 3539: 3440: 3201: 1874: 3870: 3102: 617: 3631: 2988: 2010: 4032: 3565: 2718: 2363: 1028:
experience frequent occurrences of hail. Some mediterranean countries register the maximum frequency of hail during the Fall season.
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reports hail size as a comparison to everyday objects. Hailstones larger than 1 inch in diameter are denoted as "severe."
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to try to prevent hail, and the subsequent damage to crops. Updated versions of this approach are available as modern
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it is falling through, collisions with raindrops or other hailstones, and melting as the stones fall through a warmer
734:. Ice pellets generally fall in cold weather, while hail growth is greatly inhibited during low surface temperatures. 3927: 3164: 1516: 706: 3326: 2336: 1393: 852: 594: 3080:. Nebraska Rainfall Assessment Information Network, Nebraska Department of Natural Resources. 2009. Archived from 4077: 4041: 3805: 3135: 3042:
Bauer-Messmer, Bettina; Waldvogel, Albert (1998-07-25). "Satellite data based detection and prediction of hail".
2169:. National Center for Atmospheric Research, University Corporation for Atmospheric Research. 2008. Archived from 1911: 1527: 3542:. National Severe Storms Laboratory, National Oceanic and Atmospheric Administration. 2006-10-09. Archived from 2965: 2940: 2312: 2287: 2222: 2197: 3892: 3865: 3809: 3783: 1083: 754: 492: 2000:"P9.5 Evaluation of an Alberta Hail Growth Model Using Severe Hail Proximity Soundings in the United States" 1915: 1086:, experiences some of the most frequent hailstorms in the world, with 10-30 storms per year on average. The 4446: 2491:"A global hail climatology using the UK Met Office convection diagnosis procedure (CDP) and model analyses" 1383: 1160: 2871: 4181: 2495: 1781: 1373: 1273: 723: 4022: 1280:. Smaller-sized hail, as well as snow pellets, use the coding of GS, which is short for the French word 4070: 4057: 1363: 654: 28: 24: 3021: 1515:, large rocks of ice that are not associated with thunderstorms, are not officially recognized by the 2992: 1751: 1582:
Hail can cause serious damage, notably to automobiles, aircraft, skylights, glass-roofed structures,
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Stones larger than 2 cm (0.79 in) are usually considered large enough to cause damage. The
659: 3379: 3373: 1722:, where it was claimed a 70–98% reduction in crop damage from hail storms was achieved by deploying 927:, which keeps its exterior in a liquid phase. Because it undergoes "wet growth", the outer layer is 4519: 3700: 2103: 2099: 1320: 1172: 856: 2074:. US: National Weather Service, National Oceanic and Atmospheric Administration. January 4, 2010. 3265: 649: 2170: 4504: 3293: 1746: 1099: 836:. Hailstones can grow to 15 cm (6 in) and weigh more than 0.5 kg (1.1 lb). 518: 3609: 3139: 2996: 3543: 3194: 1882: 817: 699: 513: 271: 195: 20: 3110: 1186: 4152: 3879: 3838:. 9th WMO Scientific Conference on Weather Modification. Antalya, Turkey. pp. 228–231. 3765: 3643: 3051: 2952: 2855: 2691: 2646: 2635:"Hail Climatology in the Mediterranean Basin Using the GPM Constellation (1999–2021)" 2604: 2504: 2299: 2258: 2209: 1999: 1537: 1216: 1164: 631: 229: 3576: 2722: 2367: 1669: 8: 4062: 2392: 1574: 958: 901: 793: 626: 523: 462: 288: 3883: 3769: 3647: 3172: 3055: 2956: 2859: 2844:"Climatology of hail in the triple border ParanĂĄ, Santa Catarina (Brazil) and Argentina" 2695: 2650: 2608: 2508: 2303: 2262: 2213: 1171:
Certain patterns of reflectivity are important clues for the meteorologist as well. The
4524: 3897: 3853:. 2012–2. Bali, Indonesia: 10th WMO Scientific Conference on Weather Modification: 1–4. 3667: 2819: 2794: 2536: 2042: 864:), as the more powerful updrafts in a stronger storm can keep larger hailstones aloft. 298: 276: 183: 144: 3063: 3020:. CHILL National Radar Facility, Colorado State University. 2008-08-25. Archived from 2918: 1838: 1106:
is another area known for damaging hailstorms. Hailstorms are also common in parts of
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issues severe thunderstorm warnings when hail that size or above is expected. The US
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Laviola, Sante; Monte, Giulio; Cattani, Elsa; Levizzani, Vincenzo (September 2022).
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Hailstones ranging in size from a few millimetres to over a centimetre in diameter
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updraft of a more intense "daughter" cell. This, however, is an exceptional case.
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Severe thunderstorms containing hail can exhibit a characteristic green coloration
677: 4292: 4045: 4026: 3655: 3487: 3081: 2563: 2422: 2271: 2246: 1843: 1731: 1662:, Colorado. On June 5, 2015, hail up to four feet deep fell on one city block in 1610: 1546:
18.74 in (47.6 cm) circumference, 7.0 in (17.8 cm) diameter;
1512: 1447: 1103: 1052: 993: 832:. An ice crystal with a diameter of >5 mm (0.20 in) is considered a 599: 374: 77: 3457: 2455:"Flight Briefing Notes: Adverse Weather Operations Optimum Use of Weather Radar" 1536:
7.9 in (20 cm) diameter, 18.622 in (47.3 cm) circumference;
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suspended aloft by air with strong upward motion until its weight overcomes the
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of automobiles, severely denting the vehicle and cracking or even shattering
1151: 1063: 1032: 812: 545: 499: 445: 394: 281: 3778: 3693:"Boulder County cleans up Nederland-area roadways after foot-deep hailstorm" 3517:. Telegraph Group Unlimited via the Internet Wayback Machine. Archived from 2810: 1686: 1059:, which also experiences an increased incidence of significant hail events. 4451: 4373: 4368: 4201: 4166: 4114: 2828: 1715: 1626: 1487: 1427: 1353: 873: 828:
Any thunderstorm which produces hail that reaches the ground is known as a
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Bruick, Zachary S.; Rasmussen, Kristen L.; Cecil, Daniel J. (2019-11-06).
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There are methods available to detect hail-producing thunderstorms using
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Downing, Thomas E.; Olsthoorn, Alexander A.; Tol, Richard S. J. (1999).
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Abshaev, M. T.; Abshaev, A. M.; Malkarova, A. M. (22–24 October 2007).
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Field, P.R.; Hand, W.H.; Cappelluti, G.; et al. (November 2010).
4476: 4471: 4419: 4334: 4329: 4324: 4127: 4122: 2915:"VIL density and Associated Hail Size Along the Northwest Gulf Coast" 1599: 1583: 1417: 1087: 1075: 861: 845: 801: 785: 574: 569: 364: 354: 266: 234: 217: 178: 156: 112: 4038: 3836:
Radar Estimation of Physical Efficiency of Hail Suppression Projects
3753: 3290:"Record Setting Hail Event in Vivian, South Dakota on July 23, 2010" 2517: 2490: 2286:
Brimelow, Julian C.; Reuter, Gerhard W.; Poolman, Eugene R. (2002).
1124: 4426: 4414: 4319: 4219: 2750:"Hail, Hail, Hail ! The Summertime Hazard of Eastern Colorado" 1614: 1120: 1107: 1040: 1036: 746: 369: 3864:
Federer, B.; Waldvogel, A.; Schmid, W.; et al. (1986-07-07).
3348:"What Places in the World Usually Have the Most Hail in One Year?" 2335:
Rauber, Robert M.; Walsh, John E.; Charlevoix, Donna Jean (2012).
1637: 4409: 4383: 4344: 4280: 4211: 4132: 3439:. European Aviation Safety Agency. RP EASA.2008/5. Archived from 3264:. San Diego, California: National Weather Service. Archived from 2721:. University Corporation for Atmospheric Research. Archived from 2366:. University Corporation for Atmospheric Research. Archived from 1556: 1265: 1115: 1111: 1056: 1044: 1021: 1013: 1005: 908: 877: 797: 742: 535: 413: 401: 349: 332: 303: 261: 224: 171: 100: 56: 1257:
imprecise, due to their varied dimensions. The UK organisation,
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reporting code for hail 5 mm (0.20 in) or greater is
337: 325: 320: 87: 82: 72: 65: 19:"Hailstone" and "Hailstorm" redirect here. For other uses, see 2941:"Remote Sensing of Hail with a Dual Linear Polarization Radar" 914: 4240: 4194: 1622: 1587: 1457: 1269: 1258: 1248: 1017: 1001: 997: 762: 540: 477: 139: 132: 4019: 2632: 888: 40:
A large hailstone, about 6 cm (2.4 in) in diameter
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10.1175/1520-0450(1986)025<1475:RSOHWA>2.0.CO;2
2795:"South American Hailstorm Characteristics and Environments" 2313:
10.1175/1520-0434(2002)017<1048:MMHSIA>2.0.CO;2
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10.1175/1520-0469(1983)040<1965:TIOSFS>2.0.CO;2
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was done to eliminate the hail threat, particularly across
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also sees persistent hail from mid april through october.
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10.1175/1520-0450(1986)025<0917:MROGI>2.0.CO;2
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also see frequent hailstorms due to their high elevation.
36: 2247:"Distant Green Thunderstorms – Frazer's Theory Revisited" 1491: 1343: 738: 552: 3296:: National Weather Service. 30 July 2010. Archived from 3192: 2841: 3848: 3833: 3630:
Schlatter, Thomas W.; Doesken, Nolan (September 2010).
3233:. ASU World Meteorological Organization. Archived from 2781: 1881:. American Meteorological Society. 2009. Archived from 3041: 1702:, people in Europe used to ring church bells and fire 1578:
Early automobiles were not equipped to deal with hail.
2334: 2288:"Modeling Maximum Hail Size in Alberta Thunderstorms" 2285: 1219: 1189: 3955: 3723:"One Denver block buried under up to 4 feet of hail" 2939:
Aydin, K.; Seliga, T.A.; Balaji, V. (October 1986).
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Rarely, massive hailstones have been known to cause
788:) and lowered heights of the freezing level. In the 3431: 3253: 3251: 2420: 2198:"The Influence of Storm Flow Struce on Hail Growth" 1503:
The largest recorded hailstone in the United States
3974: 2805:(12). American Meteorological Society: 4289–4304. 1261:, also scales for both hailstones and hailstorms. 1232: 1205: 4039:U.S. Billion-dollar Weather and Climate Disasters 3489:Introduction to international disaster management 2938: 2893:"Climatology of destructive hailstorms in Brazil" 1062:Hailstorms are also common in several regions of 883: 769:, while smaller hailstones and graupel are coded 4491: 3629: 3248: 3195:"National Weather Service Instruction 10 - 1605" 2913:Roeseler, Charles A.; Wood, Lance (2006-02-02). 1213:), in combination with horizontal reflectivity ( 3714: 3396: 3169:National Oceanic and Atmospheric Administration 2464:. Airbus. 2007-03-14. p. 2. Archived from 2397:University Corporation for Atmospheric Research 1941:National Oceanic and Atmospheric Administration 3936: 3917: 3806:"Deep Hail Project – Report your hail depth!!" 3515:"Giant hail killed more than 200 in Himalayas" 2885: 2488: 1997: 1314: 4078: 3993: 2257:(10). American Meteorological Society: 1754. 1998:Jewell, Ryan; Brimelow, Julian (2004-08-17). 1681: 1243: 700: 2912: 2835: 2743: 2741: 2739: 2489:Hand, W. H.; Cappelluti, G. (January 2011). 3752:Kalina, E.; et al. (26 October 2015). 3632:"Deep Hail: Tracking an Elusive Phenomenon" 2386: 2384: 4085: 4071: 3871:Journal of Climate and Applied Meteorology 3599: 3378:. Guinness World Records Limited. p.  3193:National Weather Service (July 26, 2021). 2945:Journal of Climate and Applied Meteorology 1544:Largest circumference officially measured: 707: 693: 3891: 3777: 3464:. Federal Aviation Administration. 2009. 3319:"Largest Hailstone in U.S. History Found" 2964: 2818: 2736: 2658: 2594: 2557: 2555: 2553: 2516: 2311: 2270: 2244: 2221: 2191: 2189: 2187: 3922:. Massachusetts: Butterworth-Heinemann. 3720: 2710: 2381: 2361: 2245:Gallagher, Frank W. III (October 2000). 1685: 1668: 1636: 1573: 1498: 1286: 1247: 1137: 1035:, hail is most common in the area where 969: 945: 913: 887: 876:clouds, particularly those with intense 35: 3485: 3371: 3311: 2747: 2279: 2157: 2155: 2153: 1869: 1867: 1865: 1673:Hand holding hail in a strawberry patch 1146: 4492: 3979:. State University of New York Press. 3751: 3690: 3563: 2561: 2550: 2328: 2195: 2184: 2078:from the original on September 7, 2011 1970:NOAA National Severe Storms Laboratory 1831: 1768: 1766: 900:water and will freeze on contact with 4066: 3786:from the original on 18 February 2021 3492:. Butterworth-Heinemann. p. 62. 3325:. National Geographic. Archived from 3134:. Alaska Air Flight Service Station, 2716: 2628: 2626: 1939:. National Severe Storms Laboratory, 1534:Largest diameter officially measured: 1291:Large hailstone with concentric rings 1119:the surface and upper atmosphere. In 3018:"Hydrometeor classification example" 2390: 2150: 2041:. Meteorological Service of Canada, 1862: 1554:Greatest average hail precipitation: 3512: 2393:"Meso-Analyst Severe Weather Guide" 2341:. Kendall/Hunt Publishing Company. 2202:Journal of the Atmospheric Sciences 2049:from the original on August 5, 2012 1763: 1570:List of costly or deadly hailstorms 848:-sized 4.4 cm (1.75 in). 13: 3911: 3642:(5). Taylor & Francis: 35–41. 3207:from the original on June 27, 2023 2623: 2533:"Where does severe weather occur?" 2196:Nelson, Stephan P. (August 1983). 961:, Northern Bangladesh (April 2022) 800:, it tends to be confined to high 14: 4536: 4013: 3866:"Main Results of Grossversuch IV" 3600:Carmichael, Harold (2009-06-15). 3165:National Severe Storms Laboratory 3078:"NeRAIN Data Site-Measuring Hail" 2991:. CHILL National Radar Facility, 2565:Encyclopedia of World Climatology 1784:. 21 January 2011. Archived from 1517:World Meteorological Organization 3733:from the original on 6 June 2015 3564:Peters, Albert J. (2003-03-03). 2748:Doesken, Nolan J. (April 1994). 1690:Hail cannon in an old castle in 1632: 853:Meteorological Service of Canada 676: 3977:Hailstorms and Hailstone Growth 3958:Hailstorms of the United States 3920:A Short Course in Cloud Physics 3857: 3842: 3827: 3798: 3745: 3684: 3623: 3593: 3557: 3532: 3506: 3479: 3468:from the original on 2010-03-25 3450: 3425: 3414:from the original on 2015-10-16 3365: 3340: 3282: 3259:"Appendix I – Weather Extremes" 3219: 3186: 3153: 3136:Federal Aviation Administration 3124: 3095: 3070: 3035: 3010: 2981: 2932: 2906: 2675: 2588: 2525: 2482: 2447: 2414: 2403:from the original on 2003-03-20 2362:Marshall, Jacque (2000-04-10). 2355: 2238: 2139:from the original on 2020-08-01 2121: 2110:from the original on 2009-04-12 2089: 2060: 2016:from the original on 2009-05-07 1976:from the original on 2023-10-11 1947:from the original on 2009-08-10 1912:American Meteorological Society 1851:from the original on 2013-01-16 1507: 3810:University of Colorado Boulder 3721:Mitchell, Kirk (5 June 2015). 2868:10.1016/j.atmosres.2019.104747 2704:10.1016/j.atmosres.2008.10.017 2617:10.1016/j.atmosres.2008.06.016 2338:Severe & Hazardous Weather 2251:Journal of Applied Meteorology 2035:"Severe Thunderstorm criteria" 2027: 1991: 1958: 1929: 1896: 1800: 986: 884:Layer nature of the hailstones 1: 4510:Snow or ice weather phenomena 3956:Snowden Dwight Flora (2003). 3941:. Gareth Stevens Publishing. 3566:"Crop Hail Damage Assessment" 3434:"Hail Threat Standardisation" 3064:10.1016/S0169-8095(96)00032-4 2427:. Routledge. pp. 41–43. 2106:Forecast Office. 2009-01-27. 1757: 823: 776:Hail is possible within most 4447:Potentially hazardous object 3656:10.1080/00431672.2010.503841 3350:. 2013-04-12. Archived from 3171:. 2006-11-15. Archived from 3138:. 2007-04-10. Archived from 2995:. 2007-08-22. Archived from 2989:"Hail Signature Development" 2272:10.1175/1520-0450-39.10.1754 1816:. 1999-08-06. Archived from 1530:, Bangladesh, 14 April 1986. 1526:1.02 kg (2.2 lb); 1161:Vertically Integrated Liquid 867: 7: 3975:Narayan R. Gokhale (1974). 3608:. Sun Media. Archived from 3375:Guinness World Records 2014 3227:"World: Heaviest Hailstone" 2496:Meteorological Applications 1782:National Geographic Society 1740: 1315:Size comparisons to objects 1274:surface weather observation 939:hailstone's cross-section. 604:Severe weather terminology 66:Temperate and polar seasons 16:Form of solid precipitation 10: 4541: 3691:Rubino, Joe (2010-07-29). 3486:Coppola, Damon P. (2007). 3408:adjustersinternational.com 2717:Munoz, Rene (2000-06-02). 2068:"NEW 1 Inch Hail Criteria" 1682:Suppression and prevention 1567: 1563: 1327:NWS Hail Conversion Chart 1319:In the United States, the 1244:Size and terminal velocity 1020:. In southeastern Europe, 29:Hailstorm (disambiguation) 25:Hailstone (disambiguation) 18: 4439: 4402: 4361: 4343: 4312: 4305: 4273: 4239: 4232: 4210: 4180: 4146: 4113: 4104: 4020:Hail Storm Research Tools 3513:Orr, David (2004-11-07). 2993:Colorado State University 2568:. Springer. p. 401. 2391:Wolf, Pete (2003-01-16). 1752:Cumulonimbus and aviation 4035:(archived) from ucar.edu 2562:Oliver, John E. (2005). 2424:Climate, change and risk 2133:theweatherprediction.com 2104:National Weather Service 2100:Columbia, South Carolina 1645:, Australia (April 2015) 1321:National Weather Service 1173:three body scatter spike 857:National Weather Service 3998:. Raintree Publishers. 3960:. Textbook Publishers. 3937:Jim Mezzanotte (2007). 3918:Rogers and Yau (1989). 3779:10.1175/WAF-D-15-0037.1 3758:Weather and Forecasting 3372:Glenday, Craig (2013). 2811:10.1175/MWR-D-19-0011.1 2292:Weather and Forecasting 1908:Glossary of Meteorology 1879:Glossary of Meteorology 1012:, southern and eastern 1008:, northern and eastern 794:interiors of continents 753:(which are smaller and 741:precipitation, such as 3994:Duncan Scheff (2001). 3404:"Hail Damage to Roofs" 3323:nationalgeographic.com 3294:Aberdeen, South Dakota 2799:Monthly Weather Review 1914:. 2009. Archived from 1778:nationalgeographic.org 1747:Sleet (disambiguation) 1695: 1674: 1646: 1579: 1504: 1292: 1272:code is used within a 1253: 1234: 1207: 1206:{\displaystyle Z_{dr}} 1143: 1066:, particularly in the 962: 919: 893: 792:, hail forms near the 780:(as it is produced by 737:Unlike other forms of 726:. It is distinct from 665:Tropical cyclone terms 41: 1937:"Aggregate hailstone" 1689: 1672: 1640: 1586:, and most commonly, 1577: 1502: 1290: 1251: 1235: 1233:{\displaystyle Z_{h}} 1208: 1141: 1078:, extending from the 970:Factors favoring hail 956: 917: 891: 872:Hail forms in strong 272:Extratropical cyclone 196:Air-mass thunderstorm 39: 21:Hail (disambiguation) 3044:Atmospheric Research 2848:Atmospheric Research 2719:"Fact Sheet on Hail" 2684:Atmospheric Research 2597:Atmospheric Research 2045:. November 3, 2010. 1641:Accumulated hail in 1538:Vivian, South Dakota 1264:When observed at an 1217: 1187: 1165:liquid water content 1147:Short-term detection 1102:, and Argentina, in 632:Weather modification 230:Anticyclonic tornado 3884:1986JApMe..25..917F 3770:2016WtFor..31..663K 3648:2010Weawi..63e..35S 3410:. Adjusting Today. 3056:1997AtmRe..43..217B 2957:1986JApMe..25.1475A 2860:2020AtmRe.23404747B 2763:(7). Archived from 2696:2009AtmRe..93..516P 2651:2022RemS...14.4320L 2609:2009AtmRe..91..459L 2509:2011MeApp..18..446H 2304:2002WtFor..17.1048B 2263:2000JApMe..39.1754G 2214:1983JAtS...40.1965N 1788:on 22 February 2021 1328: 1179:More recently, the 1068:temperate latitudes 957:Heavy hailstorm at 902:condensation nuclei 722:is a form of solid 627:Weather forecasting 463:Rain and snow mixed 289:Subtropical cyclone 4098:list by death toll 4044:2018-07-26 at the 4025:2022-02-02 at the 3996:Ice and Hailstorms 3540:"Hail Climatology" 3462:aviationweather.ws 2921:on August 18, 2007 2660:10.3390/rs14174320 2129:"Forecasting Hail" 2043:Environment Canada 1696: 1675: 1647: 1580: 1528:Gopalganj District 1505: 1332:Diameter (inches) 1326: 1293: 1254: 1230: 1203: 1163:or VIL, gives the 1144: 994:orographic lifting 963: 920: 894: 818:Earth's atmosphere 809:weather satellites 745:(which is made of 683:Weather portal 299:Atlantic hurricane 277:European windstorm 184:Volcanic lightning 145:Cumulonimbus cloud 42: 4485: 4484: 4462:Geomagnetic storm 4435: 4434: 4301: 4300: 4228: 4227: 4172:Soil liquefaction 4094:Natural disasters 4029:at hailtrends.com 4005:978-0-7398-4703-9 3986:978-0-87395-313-9 3967:978-0-7581-1698-7 3948:978-0-8368-7912-4 3499:978-0-7506-7982-4 3389:978-1-908843-15-9 2575:978-1-4020-3264-6 2503:(4). Wiley: 446. 2434:978-0-415-17031-4 2364:"Hail Fact Sheet" 2348:978-0-7575-9772-5 1813:The Straight Dope 1497: 1496: 1296:Terminal velocity 1082:eastward towards 1049:Cheyenne, Wyoming 954: 717: 716: 4532: 4394:Tropical cyclone 4388:Tornado outbreak 4310: 4309: 4237: 4236: 4190:Pyroclastic flow 4182:Volcano eruption 4111: 4110: 4087: 4080: 4073: 4064: 4063: 4054: 4009: 3990: 3971: 3952: 3933: 3906: 3905: 3895: 3861: 3855: 3854: 3846: 3840: 3839: 3831: 3825: 3824: 3822: 3821: 3812:. Archived from 3802: 3796: 3795: 3793: 3791: 3781: 3749: 3743: 3742: 3740: 3738: 3718: 3712: 3711: 3709: 3708: 3699:. Archived from 3688: 3682: 3681: 3679: 3678: 3627: 3621: 3620: 3618: 3617: 3597: 3591: 3590: 3588: 3587: 3581: 3570: 3561: 3555: 3554: 3552: 3551: 3536: 3530: 3529: 3527: 3526: 3510: 3504: 3503: 3483: 3477: 3476: 3474: 3473: 3454: 3448: 3447: 3445: 3438: 3429: 3423: 3422: 3420: 3419: 3400: 3394: 3393: 3369: 3363: 3362: 3360: 3359: 3344: 3338: 3337: 3335: 3334: 3315: 3309: 3308: 3306: 3305: 3300:on 1 August 2010 3286: 3280: 3279: 3277: 3276: 3270: 3263: 3255: 3246: 3245: 3243: 3242: 3223: 3217: 3216: 3214: 3212: 3206: 3199: 3190: 3184: 3183: 3181: 3180: 3157: 3151: 3150: 3148: 3147: 3128: 3122: 3121: 3119: 3118: 3099: 3093: 3092: 3090: 3089: 3074: 3068: 3067: 3039: 3033: 3032: 3030: 3029: 3014: 3008: 3007: 3005: 3004: 2985: 2979: 2978: 2968: 2936: 2930: 2929: 2927: 2926: 2910: 2904: 2903: 2901: 2900: 2889: 2883: 2882: 2880: 2879: 2870:. Archived from 2839: 2833: 2832: 2822: 2790: 2779: 2778: 2776: 2775: 2769: 2757:Colorado Climate 2754: 2745: 2734: 2733: 2731: 2730: 2714: 2708: 2707: 2679: 2673: 2672: 2662: 2630: 2621: 2620: 2603:(2–4): 459–465. 2592: 2586: 2585: 2583: 2582: 2559: 2548: 2547: 2545: 2544: 2529: 2523: 2522: 2520: 2486: 2480: 2479: 2477: 2476: 2470: 2459: 2451: 2445: 2444: 2442: 2441: 2418: 2412: 2411: 2409: 2408: 2388: 2379: 2378: 2376: 2375: 2359: 2353: 2352: 2332: 2326: 2325: 2315: 2298:(5): 1048–1062. 2283: 2277: 2276: 2274: 2242: 2236: 2235: 2225: 2208:(8): 1965–1983. 2193: 2182: 2181: 2179: 2178: 2159: 2148: 2147: 2145: 2144: 2125: 2119: 2118: 2116: 2115: 2093: 2087: 2086: 2084: 2083: 2064: 2058: 2057: 2055: 2054: 2031: 2025: 2024: 2022: 2021: 2015: 2004: 1995: 1989: 1988: 1982: 1981: 1962: 1956: 1955: 1953: 1952: 1933: 1927: 1926: 1924: 1923: 1900: 1894: 1893: 1891: 1890: 1871: 1860: 1859: 1857: 1856: 1835: 1829: 1828: 1826: 1825: 1804: 1798: 1797: 1795: 1793: 1770: 1732:artillery shells 1726:in clouds using 1720:the Soviet Union 1692:Banska Stiavnica 1664:Denver, Colorado 1548:Aurora, Nebraska 1335:Everyday Object 1329: 1325: 1303:, the motion of 1301:drag coefficient 1239: 1237: 1236: 1231: 1229: 1228: 1212: 1210: 1209: 1204: 1202: 1201: 1123:, the cities of 955: 796:, while, in the 709: 702: 695: 681: 680: 294:Tropical cyclone 206:Dry thunderstorm 101:Tropical seasons 44: 43: 4540: 4539: 4535: 4534: 4533: 4531: 4530: 4529: 4520:Weather hazards 4490: 4489: 4486: 4481: 4431: 4398: 4362:Cyclonic storms 4357: 4339: 4297: 4293:Limnic eruption 4269: 4243: 4224: 4212:Natural erosion 4206: 4176: 4150: 4142: 4100: 4091: 4052: 4046:Wayback Machine 4027:Wayback Machine 4016: 4006: 3987: 3968: 3949: 3930: 3914: 3912:Further reading 3909: 3862: 3858: 3847: 3843: 3832: 3828: 3819: 3817: 3804: 3803: 3799: 3789: 3787: 3750: 3746: 3736: 3734: 3727:The Denver Post 3719: 3715: 3706: 3704: 3689: 3685: 3676: 3674: 3628: 3624: 3615: 3613: 3598: 3594: 3585: 3583: 3579: 3568: 3562: 3558: 3549: 3547: 3538: 3537: 3533: 3524: 3522: 3511: 3507: 3500: 3484: 3480: 3471: 3469: 3456: 3455: 3451: 3443: 3436: 3430: 3426: 3417: 3415: 3402: 3401: 3397: 3390: 3370: 3366: 3357: 3355: 3346: 3345: 3341: 3332: 3330: 3317: 3316: 3312: 3303: 3301: 3288: 3287: 3283: 3274: 3272: 3268: 3261: 3257: 3256: 3249: 3240: 3238: 3225: 3224: 3220: 3210: 3208: 3204: 3197: 3191: 3187: 3178: 3176: 3159: 3158: 3154: 3145: 3143: 3130: 3129: 3125: 3116: 3114: 3101: 3100: 3096: 3087: 3085: 3076: 3075: 3071: 3040: 3036: 3027: 3025: 3016: 3015: 3011: 3002: 3000: 2987: 2986: 2982: 2951:(10): 1475–14. 2937: 2933: 2924: 2922: 2911: 2907: 2898: 2896: 2891: 2890: 2886: 2877: 2875: 2840: 2836: 2791: 2782: 2773: 2771: 2767: 2752: 2746: 2737: 2728: 2726: 2715: 2711: 2680: 2676: 2631: 2624: 2593: 2589: 2580: 2578: 2576: 2560: 2551: 2542: 2540: 2531: 2530: 2526: 2518:10.1002/met.236 2487: 2483: 2474: 2472: 2468: 2457: 2453: 2452: 2448: 2439: 2437: 2435: 2419: 2415: 2406: 2404: 2389: 2382: 2373: 2371: 2360: 2356: 2349: 2333: 2329: 2284: 2280: 2243: 2239: 2194: 2185: 2176: 2174: 2161: 2160: 2151: 2142: 2140: 2127: 2126: 2122: 2113: 2111: 2095: 2094: 2090: 2081: 2079: 2066: 2065: 2061: 2052: 2050: 2033: 2032: 2028: 2019: 2017: 2013: 2002: 1996: 1992: 1979: 1977: 1964: 1963: 1959: 1950: 1948: 1935: 1934: 1930: 1921: 1919: 1902: 1901: 1897: 1888: 1886: 1873: 1872: 1863: 1854: 1852: 1844:Merriam-Webster 1837: 1836: 1832: 1823: 1821: 1806: 1805: 1801: 1791: 1789: 1772: 1771: 1764: 1760: 1743: 1737: 1684: 1635: 1572: 1566: 1550:, 22 June 2003. 1540:, 23 July 2010. 1513:Megacryometeors 1510: 1317: 1246: 1224: 1220: 1218: 1215: 1214: 1194: 1190: 1188: 1185: 1184: 1149: 1104:southern Brazil 1053:Hailstorm Alley 1016:, and northern 989: 972: 946: 886: 870: 826: 713: 675: 670: 669: 645: 637: 636: 495: 485: 484: 397: 387: 386: 375:Ground blizzard 135: 125: 124: 103: 93: 92: 68: 32: 17: 12: 11: 5: 4538: 4528: 4527: 4522: 4517: 4512: 4507: 4502: 4483: 4482: 4480: 4479: 4474: 4469: 4464: 4459: 4454: 4449: 4443: 4441: 4437: 4436: 4433: 4432: 4430: 4429: 4424: 4423: 4422: 4412: 4406: 4404: 4400: 4399: 4397: 4396: 4391: 4381: 4371: 4365: 4363: 4359: 4358: 4356: 4355: 4349: 4347: 4341: 4340: 4338: 4337: 4332: 4327: 4322: 4316: 4314: 4307: 4306:Meteorological 4303: 4302: 4299: 4298: 4296: 4295: 4290: 4289: 4288: 4277: 4275: 4271: 4270: 4268: 4267: 4262: 4257: 4251: 4249: 4234: 4230: 4229: 4226: 4225: 4223: 4222: 4216: 4214: 4208: 4207: 4205: 4204: 4199: 4198: 4197: 4186: 4184: 4178: 4177: 4175: 4174: 4169: 4164: 4162:Seismic hazard 4158: 4156: 4144: 4143: 4141: 4140: 4135: 4130: 4125: 4119: 4117: 4108: 4102: 4101: 4090: 4089: 4082: 4075: 4067: 4061: 4060: 4049: 4036: 4033:Hail Factsheet 4030: 4015: 4014:External links 4012: 4011: 4010: 4004: 3991: 3985: 3972: 3966: 3953: 3947: 3934: 3928: 3913: 3910: 3908: 3907: 3878:(7): 917–957. 3856: 3841: 3826: 3797: 3744: 3713: 3697:Colorado Daily 3683: 3622: 3592: 3556: 3531: 3505: 3498: 3478: 3449: 3446:on 2013-12-07. 3424: 3395: 3388: 3364: 3339: 3310: 3281: 3271:on 28 May 2008 3247: 3218: 3185: 3152: 3142:on May 1, 2008 3123: 3094: 3069: 3034: 3009: 2980: 2931: 2905: 2884: 2834: 2780: 2735: 2709: 2674: 2639:Remote Sensing 2622: 2587: 2574: 2549: 2524: 2481: 2446: 2433: 2413: 2380: 2354: 2347: 2327: 2278: 2237: 2183: 2149: 2120: 2088: 2059: 2026: 1990: 1957: 1943:. 2007-04-23. 1928: 1895: 1861: 1830: 1799: 1761: 1759: 1756: 1755: 1754: 1749: 1742: 1739: 1683: 1680: 1660:Boulder County 1634: 1631: 1609:or fatal head 1568:Main article: 1565: 1562: 1561: 1560: 1551: 1541: 1531: 1509: 1506: 1495: 1494: 1485: 1481: 1480: 1475: 1471: 1470: 1465: 1461: 1460: 1455: 1451: 1450: 1445: 1441: 1440: 1435: 1431: 1430: 1425: 1421: 1420: 1415: 1411: 1410: 1408:Ping Pong Ball 1401: 1397: 1396: 1391: 1387: 1386: 1381: 1380:1.00 (15/16") 1377: 1376: 1371: 1367: 1366: 1361: 1357: 1356: 1351: 1347: 1346: 1341: 1337: 1336: 1333: 1316: 1313: 1245: 1242: 1227: 1223: 1200: 1197: 1193: 1148: 1145: 1133:Southern Chile 1100:Santa Catarina 1080:Mendoza region 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Index

Hail (disambiguation)
Hailstone (disambiguation)
Hailstorm (disambiguation)

a series
Weather
Temperate and polar seasons
Winter
Spring
Summer
Autumn
Tropical seasons
Dry season
Harmattan
Wet season
Storms
Cloud
Cumulonimbus cloud
Arcus cloud
Downburst
Microburst
Heat burst
Derecho
Lightning
Volcanic lightning
Thunderstorm
Air-mass thunderstorm
Thundersnow
Dry thunderstorm
Mesocyclone

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