Utah
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Statewide
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June 01, 1983
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Flood
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7
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$880,410,000.00
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$300,000,000.00
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Record snowpack resulted in severe flooding from extensive runoff. Flooding occurred all along the Wasatch Front, damaging homes and public property. Creeks and rivers across the state saw record flows, including five of the six creeks in Salt Lake Valley. In June, high waters caused the failure of a dam near Delta, the resulting flood destroyed the town of Deseret. Seven people died in the floodwaters.
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Colorado
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Jefferson, Denver, Arapahoe, Kiowa
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Golden, Denver, Englewood
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May 06, 1973
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Flood
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2
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$789,989,000.00
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$120,000,000.00
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Heavy rain and snowmelt caused severe flooding on Bear Creek, Turkey Creek, Plum Creek, and the South Platte River. The worst flooding in Denver since the June 1965 flood. Stapleton Airport measured 3.27" of precipitation in 24 hours.
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Utah
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Salt Lake, Davis, Weber, Box Elder, Tooele
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June 03, 1986
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Flood
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$714,738,000.00
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$268,000,000.00
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Continued greater-than-average precipitation brought the Great Salt Lake to a 140-year record-high elevation of 4,211.85' and caused widespread flooding.
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Colorado
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Grand, Larimer
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Kremmling, Estes Park, Grand Lake, Granby
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October 14, 2020
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Wildfire
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$613,253,000.00
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$543,000,000.00
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The East Troublesome Fire is the second-largest wildfire in Colorado history as of 2020.
"The East Troublesome Fire was reported on the afternoon of October 14. The origination point was northeast of Kremmling in Grand County, Colo. on the Arapaho National Forest. The cause is still under investigation. Within three days, high winds and low humidity allowed the fire to spread to over 10,000 acres. The direction of fire spread threatened State Highway 125 and forced the closure of the road and mandatory evacuation of approximately 90 homes by October 17.
Between Oct. 20-23, the fire spread increased dramatically with 24-hour increases of around 18,000 to 87,000 acres during the four-day run. The peak fire spread of 87,093 acres occurred between late afternoon on Oct. 21 and the early afternoon of Oct. 22. The size of the fire exploded from 18,550 acres to 187,964 acres during this period. The fire crossed Highway 125 on the afternoon of Oct. 21 and spread eastward into the Rocky Mountain National Park on Oct. 22, crossing the Continental Divide and reaching the western edge of Estes Park on Oct. 23.
The fire was fueled by wide-spread drought, numerous dead and down beetle-killed trees, red flag weather conditions created by high winds and dry conditions, and poor humidity recovery overnight. The combination of these factors led to unprecedented, wind-driven, active fire behavior with rapid spread during the overnight hours. During this period the area north of US Highway 40 from near Granby and extending eastward to Grand Lake and Estes Park had over 7,000 structures threatened, and a population of over 35,000 placed under a mandatory evacuation.
A winter storm from Saturday, Oct. 24 through the morning of Oct. 26 brought very cold temperatures, precipitation in the form of snow and lighter winds, resulting in a dramatic drop in fire behavior with smoldering and reduced fire spread on both sides of the Continental Divide. Over this 3-day period, fire growth fell to a total of around 4,500 acres for a total of 192,457 acres. From that point forward, fire activity remained minimal with little change in area and a final total acreage of 193,812. The fire was declared contained on Nov. 30, 2020." - InciWeb
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Utah
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Uintah, Carbon, Emery, Wayne, Sevier, Summit, Kane, Garfield, Piute, Millard, Juab, Beaver, Delta, Salt Lake, Utah, Davis
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April 13, 1983
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Landslide, Flood
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$586,940,000.00
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$200,000,000.00
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Starting on April 13, a landslide caused by heavy precipitation dammed the Spanish Fork River, which then inundated the community of Thistle. The slide also destroyed the Rio Grande railroad tracks and US 6 and US 89. The landslide was the most costly geological event in Utah's history. Presidential Disaster declaration.
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Colorado
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El Paso
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Woodland Park, Manitou Springs, Colorado Springs
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June 23, 2012
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Wildfire
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2
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$568,388,000.00
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$446,460,000.00
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The Waldo Canyon Fire burned during severe to extreme drought conditions; strong outflow winds from a thunderstorm on June 26 pushed the fire into the western portion of Colorado Springs, where most of the 346 homes destroyed in the fire were lost. Two residents were killed. Over 18,000 acres burned. The fourth most destructive wildfire in Colorado history, in terms of homes destroyed, behind the Cameron Peak Fire in 2020 (#3), Black Forest Fire in 2013 (#2), and the Marshall Fire in 2021 (#1).
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Colorado
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Boulder
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Louisville, Superior
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December 30, 2021
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Wildfire, High Wind
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2
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$553,604,000.00
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$513,213,000.00
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The Marshall Fire is the most destructive wildfire in Colorado history, in terms of cost and structures lost, as of 2021.
See our Marshall Fire Briefing for an overview of the event. The briefing represents our state of knowledge as it exists January 13, 2022 and is provided as a service to place the disastrous fire into a climate and human context.
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Utah
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Statewide
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January 01, 2002
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Drought
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$519,926,000.00
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$320,000,000.00
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The worst year of a statewide drought from 2000-2004. One of the worst droughts on record in the Upper Colorado River Basin. Low precipitation combined with above-average temperatures reduced available water. The statewide summer Palmer Drought Index was -6.1, the 2nd lowest on record. Dryland farmers reported low yields and a state of agricultural disaster was declared for drought and then grasshopper and Mormon cricket infestations. Costs are from 2002 and 2003 combined.
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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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Utah
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Salt Lake
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Salt Lake City
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August 11, 1999
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Tornado
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1
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$403,530,000.00
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$230,000,000.00
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During the early afternoon, the most destructive tornado in Utah's history touched down in southwest Salt Lake City. Shortly after touching down the tornado intensified to an F2. It moved northeast, causing widespread damage at Delta Center including the only fatality of the storm at an outdoor retailers' convention tent. The tornado skirted the Capitol Building and ripped out several large trees there and in Memory Grove. Before lifting off, it caused significant damage in the residential area known as The Avenues. The storm resulted in 1 fatality, 80 injuries, 300 buldings and homes damaged, with 34 deemed uninhabitable. The event destroyed 500 trees and damaged 300 more. Additional damages were inflicted on vehicles and infastracture. The storm had an average width of 300 to 600 ft., a path length of 4.5 mi., and was on the ground for 14 minutes.
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