Larimer County weather alerts
There are no active weather alerts for Larimer County, CO right now.
Since 2016 the National Weather Service has issued about 1,355 alerts that included Larimer County, roughly 136 a year. The most common is the winter weather advisory (234 from 2016 to 2025). No tornado warnings were recorded here in that period. 33 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Larimer County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Jackson County, Albany County, Grand County, Weld County.
Larimer County alert history
Alert events that included Larimer County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 234 | 14 | November 2, 2026 |
| Flood Advisory | 201 | 19 | September 7, 2026 |
| Severe Thunderstorm Warning | 122 | 12 | September 7, 2026 |
| Flash Flood Warning | 116 | 2 | August 14, 2026 |
| Red Flag Warning | 116 | 34 | August 5, 2026 |
| Winter Storm Warning | 89 | 4 | May 18, 2026 |
| Winter Storm Watch | 87 | 2 | May 5, 2026 |
| High Wind Warning | 74 | 4 | March 12, 2026 |
| Fire Weather Watch | 55 | 28 | August 5, 2026 |
| High Wind Watch | 45 | 2 | March 12, 2026 |
| Severe Thunderstorm Watch | 36 | 3 | August 26, 2026 |
| Dense Fog Advisory | 31 | 3 | October 31, 2026 |
| Freeze Warning | 28 | 3 | October 16, 2026 |
| Flood Watch | 26 | 1 | August 15, 2026 |
| Frost Advisory | 22 | 1 | May 19, 2026 |
| Heat Advisory | 15 | 6 | August 8, 2026 |
| Snow Squall Warning | 13 | 2 | February 17, 2026 |
| Cold Weather Advisory | 12 | 1 | January 26, 2026 |
| Freeze Watch | 11 | 4 | October 16, 2026 |
| Tornado Watch | 6 | 0 | June 29, 2023 |
| Extreme Cold Warning | 6 | 0 | January 21, 2025 |
| Blizzard Warning | 4 | 0 | March 14, 2021 |
| Flood Warning | 3 | 0 | June 12, 2023 |
| Extreme Cold Watch | 3 | 0 | January 21, 2025 |
Tornado history in Larimer County
33 tornadoes have been recorded in Larimer County since 1950, killing 1 people and injuring 78. That ranks 21 of 64 counties in Colorado. The most recent was on May 18, 2018 (rated EF0).
Strongest tornadoes in Larimer County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 22, 2008 | EF3 | Weld County | 38.7 mi | 1,760 yd | 1 | 78 |
| June 4, 2015 | EF3 | Boulder County | 6.7 mi | 440 yd | 0 | 0 |
| June 9, 1990 | F2 | Larimer County | 23 mi | 200 yd | 0 | 0 |
| May 30, 1957 | F2 | Larimer County | 9.1 mi | 10 yd | 0 | 0 |
| June 4, 1976 | F2 | Larimer County | 0.5 mi | 300 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 18, 2018 | EF0 | Larimer County | 0 mi | 25 yd | 0 | 0 |
| June 4, 2015 | EF3 | Boulder County | 6.7 mi | 440 yd | 0 | 0 |
| May 22, 2008 | EF3 | Weld County | 38.7 mi | 1,760 yd | 1 | 78 |
| July 25, 2005 | F0 | Larimer County | 0.1 mi | 50 yd | 0 | 0 |
| May 9, 2002 | F0 | Larimer County | 0.1 mi | 50 yd | 0 | 0 |
About Larimer County
- Population: 374,574 (2024 estimate)
- State: Colorado
- NOAA Weather Radio SAME code: 008069 (how to use it)
- Cities: Fort Collins