National Weather ServiceColoradoFlash Flood WarningArchive to October 1, 2026
Flash Flood Warnings in Colorado
The National Weather Service issued 119 flash flood warnings for Colorado in 2025 and 116 a year on average in 2008-2025; in 2021-2025 it had the 6th most of any state. 2026 through September: 229, 98% above the average of 116 for those months in 2008-2025. El Paso was covered most often (285 times since 2008).
How many flash flood warnings does Colorado get?
Every flash flood warning that covered part of Colorado. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 229 |
| 2025 | 119 |
| 2024 | 94 |
| 2023 | 175 |
| 2022 | 204 |
| 2021 | 285 |
| 2020 | 82 |
| 2019 | 99 |
| 2018 | 106 |
| 2017 | 89 |
| 2016 | 79 |
| 2015 | 107 |
| 2014 | 144 |
| 2013 | 176 |
| 2012 | 62 |
| 2011 | 89 |
| 2010 | 81 |
| 2009 | 46 |
| 2008 | 51 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Colorado get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in Colorado?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| El Paso | 285 | 59 | August 26, 2026 |
| Pueblo | 208 | 81 | September 30, 2026 |
| Larimer | 178 | 44 | August 14, 2026 |
| Huerfano | 163 | 19 | August 27, 2026 |
| Fremont | 149 | 29 | August 26, 2026 |
| Custer | 142 | 49 | September 30, 2026 |
| Kit Carson | 123 | 23 | July 4, 2026 |
| Garfield | 119 | 27 | September 20, 2026 |
| Mesa | 102 | 37 | September 19, 2026 |
| Las Animas | 93 | 27 | August 31, 2026 |
| Yuma | 89 | 8 | June 25, 2026 |
| Costilla | 83 | 6 | August 23, 2025 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
The latest flash flood warnings for Colorado in AreaZine's record
NWS PuebloWarningSeptember 30, 2026
Flash Flood Warning: Custer and Pueblo, CO
Expired 8:30 p.m. MDT, September 30, 2026
NWS PuebloWarningSeptember 30, 2026
Flash Flood Warning: Custer and Pueblo, CO
Expired 2:30 p.m. MDT, September 30, 2026
NWS PuebloWarningSeptember 29, 2026
Flash Flood Warning: Pueblo, CO
Expired 8:45 p.m. MDT, September 29, 2026
NWS Grand JunctionWarningSeptember 25, 2026
Flash Flood Warning: Rio Blanco, CO
Expired 5:00 p.m. MDT, September 25, 2026
NWS DenverWarningSeptember 22, 2026
Flash Flood Warning: Western Arapahoe and Douglas, CO
Expired 10:30 p.m. MDT, September 22, 2026
NWS Grand JunctionWarningSeptember 22, 2026
Flash Flood Warning: Dolores, CO
Expired 3:45 p.m. MDT, September 22, 2026
NWS Grand JunctionWarningSeptember 19, 2026
Flash Flood Warning: Garfield, CO
Expired 9:15 p.m. MDT, September 19, 2026
NWS Grand JunctionWarningSeptember 19, 2026
Flash Flood Warning: Rio Blanco, CO
Expired 9:00 p.m. MDT, September 19, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a flash flood warning?
A flash flood warning means flash flooding is happening or about to happen: water rising fast in streams, streets or dry washes, usually within six hours of heavy rain or a dam or levee failure. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in Colorado.