Colorado, Utah, Wyoming
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May 22, 2012
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Drought
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In May 2012, a pocket of extreme drought develops in northwest CO. This pocket expands over most of CO and eastern UT through the summer of that year. In July, exceptional drought conditions develop in southeast CO (and this exceptional and extreme drought in this region only resolves in August of 2014). In July 2012, pockets of extreme drought start to develop in WY, with exceptional drought developing in the eastern part of the state in September 2012. In January 2013, extreme drought ends in UT. In October 2013, the last portions of extreme drought in WY disappear.
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Colorado
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June 01, 2012
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Drought
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Heat Wave/Drought. "Many record high temperatures were also set during the summer months, especially June, where June of 2012 was the hottest June in Denver since weather records began back in 1872. Many areas in western Colorado also saw record high temperatures including several 100 degree days. This record breaking and triple digit heat was felt statewide. Denver had a total of seventeen 90 degree days and a stretch of five consecutive 100 degree days during the month of June, compared to eighteen 90 degree days and six 100 degree days in Grand Junction during the same month. To put it in perspective, the normal high temperature in Denver during the month of June is 82 degrees on average, making high temperatures in June 2012 some 10 to 20 degrees above normal. On the other side of the divide, the normal high temperature in Grand Junction during the month of June is 88 degrees on average, making high temperatures in June 2012 some 8 to 12 degrees above normal which is still very hot for this time of year." - NWS
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Utah
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Washington
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St. George
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December 21, 2010
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Flood
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Virgin River Flood. "In 2010, a widespread, long duration rainfall event continued for 4 straight days. The North Fork Virgin River, which has a base flow rate of 100 cubic feet per second, rose to 6,000 cubic feet per second during this event. The Virgin River near the town of St. George recorded flows rising from 100 cubic feet per second to 25,000 cubic feet per second in a 24-hour period. Zion National Park was heavily damaged due to the flooding. The town of Washington also reported widespread flooding." - National Weather Service
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Utah
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Wayne
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Hanksville
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January 01, 2006
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Flood
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Escalante River Flood. "The flooding of the Escalante River in 2006 resulted in widespread destruction of most of the roads in the Grand Staircase Escalante National Monument. Hundreds of people were stranded during the flooding in many of the National Parks and Monuments. Many roads remained unrepaired for up to 5 years. The Grand Staircase Escalante National Monument was closed to visitors. The rainfall and runoff from this event caused Lake Powell to rise by 5 feet during this storm. Hanksville was also heavily damaged and irrigation systems were destroyed." - National Weather Service
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Wyoming
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Laramie
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Cheyenne
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July 15, 1896
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Flood
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Cheyenne Flood. "Heavy rain (4,78 inches in 3 hours) caused flooding resulting in extensive damage to buildings, transportation facilities, and utilities. There was loss of lives." - University of Wyoming
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Colorado
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El Paso
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Colorado Springs
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July 28, 2016
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Hail
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$429,663,000.00
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$352,800,000.00
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Sixth most damaging hail storm in Colorado history. "This storm was concentrated in the Colorado Springs area and the size of the hail resulted in a very high percentage of claims that were total losses." - The Gazette
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Colorado
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Denver, Douglas, Arapahoe, Elbert
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June 06, 2012
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Hail, Flood
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$1,273,100,000.00
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$1,000,000,000.00
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Part of NCDC's billion-dollar disaster list. In total, the estimated damage the severe storms and hail caused in CO is over $1B.
"Unusual overnight severe weather hit the metro area Wednesday into Thursday, bringing lightning, thunder, heavy rain, hail and flooding to much of the region. Despite several Tornado Warnings, there were no confirmed tornado touchdowns with the round of late night storms. Hail hit the southern and western parts of metro Denver especially hard. Several inches were on the ground Thursday in places such as Castle Rock, Parker and Highlands Ranch." - FOX31
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Colorado
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Boulder, Jefferson, Denver, Arapahoe, Douglas
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September 29, 2014
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Hail
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$262,989,000.00
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$213,000,000.00
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Part of NCDC's billion-dollar disaster list. Estimated to be the eighth-most costly hailstorm in Colorado history.
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Wyoming
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Campbell
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Gillette
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July 30, 1993
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Hail
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$34,387,800.00
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$17,000,000.00
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"On July 30, 1993, a number of thunderstorms worked their way through northeast Wyoming. The Gillette area was hit hard, with one report of 4-inch-diameter hail from the central tower at the Gillette airport. There was significant roof and window damage to homes and businesses. No injuries were noted. The damage was reported to be $17 million ($30.4 million in 2019 USD)." - WY Hazard Mitigation Plan
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Wyoming
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Laramie
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Cheyenne
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July 30, 1979
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Hail
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$66,430,900.00
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$16,500,000.00
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"On July 30, 1979, an extremely large and intense thunderstorm moving through the Cheyenne area caused extensive hail damage to cars, homes, and city buildings. Hail up to two inches in diameter was verified in town with reports of baseball-sized hail south of the city. Damage was in excess of $2.5 million ($8.8 million in 2020 USD) as reported by the Wyoming Tribune Eagle. State Farm Insurance reported more than $3.2 million in claims for the event, and the State of Wyoming All-Hazard Mitigation Plan from December 1999, reported that $16.5 million in damage may have occurred during the storm. The $16.5 million figure was obtained from the Western Insurance Information Service, and may have included damage from Fort Collins, Colorado." - WY Hazard Mitigation Plan
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