553 first-hand accounts of flood events in Colorado, ranked by impact. Each is a NOAA-written narrative of the moment.
Torrential rainfall, up to 2.6 inches was observed from southeast Denver and Aurora, and extended south southwest to Castle Pines, west of Castle Rock and into Roxborough State Park. Most of the rainfall fell in less than 45 minutes.
Read the full account →One flash flood occurred on Coal Creek during the early morning hours. A nearby spotter measured 5 inches of rainfall during the event. In the next event, a flash flood reportedly produced 3 feet of running water.
Read the full account →Severe thunderstorms produced heavy rain, large hail and damaging wind across parts of Boulder, Denver, Elbert, Larimer and Weld counties. One tornado touched down briefly near Carr, but no damage was observed.
Read the full account →Severe thunderstorms produced heavy rain, large hail and damaging wind across parts of Boulder, Denver, Elbert, Larimer and Weld counties. One tornado touched down briefly near Carr, but no damage was observed.
Read the full account →Severe thunderstorms produced large hail and damaging wind gusts across portions of Adams, Denver, Elbert, Lincoln and Logan Counties. The hail ranged in size from 1 to 2 inches in diameter. Peak wind gusts up to around 70 mph were observed.
Read the full account →Long duration severe weather event across the northeast plains, and most of the Denver metropolitan area beginning during the early afternoon hours. Scores of tornadoes occurred across Washington and Logan counties.
Read the full account →Severe thunderstorms produced large hail, from penny to tennis ball size across parts of Jefferson, Adams, Arapahoe, Denver and Washington counties. The hail along with heavy rain caused flooding and flash flooding problems.
Read the full account →Severe thunderstorms produced large hail, from penny to tennis ball size across parts of Jefferson, Adams, Arapahoe, Denver and Washington counties. The hail along with heavy rain caused flooding and flash flooding problems.
Read the full account →A severe thunderstorm developed just north of the region and drifted into northern El Paso County on the evening of September 6th. As the storm moved towards I-25 it began to produce large hail. One report of quarter size hail was sent by a trained spotter.
Read the full account →In the Glen Haven and Crystal Mountain areas heavy rain produced flash flooding. Radar estimated 0.50 to 0.75 inch of rain in 30 minutes. Miller Fork washed over Larimer County Road 43 at Streamside Drive near The Retreat, closing the roadway.
Read the full account →In the Glen Haven and Crystal Mountain areas heavy rain produced flash flooding. Radar estimated 0.50 to 0.75 inch of rain in 30 minutes. Miller Fork washed over Larimer County Road 43 at Streamside Drive near The Retreat, closing the roadway.
Read the full account →A plume of moisture advected north into the region underneath a ridge of high pressure. Residual moisture from previous days convection helped to prime the atmosphere which led to an uptick in shower and thunderstorm coverage across western Colorado.
Read the full account →Flash flooding occurred on Tonahutu Creek. Trees, mud and debris shut down Grand Lake's hydro plant. Approximately 50 downed trees piled up at the plant's head gate and ash and mud filled the ditch leading to another gate. Another flash flood impacted CO-125.
Read the full account →Flash flooding occurred on Tonahutu Creek. Trees, mud and debris shut down Grand Lake's hydro plant. Approximately 50 downed trees piled up at the plant's head gate and ash and mud filled the ditch leading to another gate. Another flash flood impacted CO-125.
Read the full account →Severe thunderstorms produced intense winds and large hail across Adams, Broomfield, Douglas, Jefferson, Morgan, Weld and Phillips counties. The hail ranged in size from one to two inches in diameter. Three short-lived brief tornadoes touched down in Phillips County.
Read the full account →Severe thunderstorm broke out across Denver and the surrounding metro area and produced large damaging hail, strong winds, heavy rain and flash flooding.
Read the full account →Very heavy rain occurred across some areas of northeast Colorado from June 11th until the early hours of June 12th with flash flooding in some areas. The worst areas were south and southeast of Fort Collins towards Timnath and Windsor and in the Milliken area.
Read the full account →Very heavy rain occurred across some areas of northeast Colorado from June 11th until the early hours of June 12th with flash flooding in some areas. The worst areas were south and southeast of Fort Collins towards Timnath and Windsor and in the Milliken area.
Read the full account →Severe thunderstorms produced large hail, from penny to tennis ball size across parts of Jefferson, Adams, Arapahoe, Denver and Washington counties. The hail along with heavy rain caused flooding and flash flooding problems.
Read the full account →Torrential rainfall, up to 2.6 inches was observed from southeast Denver and Aurora, and extended south southwest to Castle Pines, west of Castle Rock and into Roxborough State Park. Most of the rainfall fell in less than 45 minutes.
Read the full account →Flash flooding occurred on Tonahutu Creek. Trees, mud and debris shut down Grand Lake's hydro plant. Approximately 50 downed trees piled up at the plant's head gate and ash and mud filled the ditch leading to another gate. Another flash flood impacted CO-125.
Read the full account →Above normal temperatures accelerated snowmelt from a near-record snowpack. This resulted in high and fast flows on several rivers and drainages across Western Colorado.
Read the full account →High pressure began to reposition over the Great Basin, cutting off the stream of deep monsoonal moisture over the region. Even so, enough moisture lingered over the area which resulted in another round of diurnal showers and thunderstorms.
Read the full account →Heavy rain occurred over a large portion of the Waldo Canyon burn scar from late afternoon through early morning. A flow of ash and gravel covered US Highway 24 to a depth of five feet, stranding a truck and trailer.
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