42
Recorded events
0
Direct deaths
0
Direct injuries
$1.5M
Property damage
Flash Flood in Weld County, Colorado: 42 recorded events between 1996 and 2025. The strongest on record measured 0. That places the county #779 nationally and #8 statewide for this hazard.
Decade by decade
Flash Flood in Weld County, Colorado: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Weld County is the 2010s, when 17 of the county's 42 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Weld County archive, flash flood makes up 2.2% of all recorded severe weather across 8 hazard types. Nationally the county sits at #779 for this hazard and #8 within Colorado, putting it in the 74.5 percentile of all U.S. counties.
Seasonality
Events by month
Jul is the peak month for flash flood in Weld County with 15 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Aug 1, 2025 | HEREFORD | 0 | $0 |
| Aug 1, 2025 | PURCELL | 0 | $0 |
| Jun 20, 2024 | AULT | 0 | $0 |
| Jun 12, 2023 | WINDSOR | 0 | $50K |
| Jul 1, 2021 | GREELEY | 0 | $50K |
| Jul 1, 2021 | ROCKPORT | 0 | $5K |
| Jul 1, 2021 | ROCKPORT | 0 | $0 |
| Jul 1, 2021 | ROCKPORT | 0 | $5K |
| Jul 1, 2021 | ROCKPORT | 0 | $0 |
| Jun 19, 2018 | KEENESBURG | 0 | $10K |
Other hazards here
More from Weld County
- Hail 1,168
- Thunderstorm Wind 339
- Tornado 292
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Anywhere from 3 to 5 inches of rainfall reportedly fell in the Greeley area in less the 2 hours. As a result, several roads were inundated with up to 2 feet of water and many basements of homes and businesses were flooded. In the basement of Greeley City Hall, several boxes of documents dating back to the 1800's were drenched in the floodwaters. The roof of a local business collapsed during the deluge. Approximately 2300 homes and businesses in town suffered electrical outages.
Heavy rain combined with torrential hail, clogged drains and caused flash flooding throughout Greeley. The intersection near U.S. 34 and U.S. 85 was inundated with up to 3 feet of water. Firefighters rescued several residents from garden level apartments that had flooded. Several businesses and buildings suffered flood damage, including Greeley City Hall and an apartment complex in Evans. The Greeley Mall was extensively damaged as water poured into the mall from the roof and debris inundated the main floor. The Frontier Academy Elementary School was also flooded, with administrators canceling classes the following day.
Heavy rain caused flash flooding in Greeley. Many roads in and around town were either flooded or washed out. Floodwaters along 10th Street, the main thoroughfare in Greeley, had anywhere from 1 to 3 feet of water covering the roadway. Several cars were stalled in the floodwaters. Extensive flooding was also observed in Evans, along U.S. Highways 34 and 85. The rain flooded the basement of Greeley City Hall, along with numerous other homes and businesses in the city.
Quick answers
Frequently asked
How many flash flood events are on record in Weld County, Colorado?
42 flash flood events are recorded in Weld County between 1996 and 2025, causing 0 direct deaths.
What is the strongest flash flood recorded in Weld County?
The strongest flash flood on record in Weld County measured 0.
Where does the flash flood data for Weld County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flash Flood in Weld County, Colorado.” Severe Weather History. severeweatherhistory.com/county/colorado/weld-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.