Costilla County weather alerts
There are no active weather alerts for Costilla County, CO right now.
Since 2016 the National Weather Service has issued about 158 alerts that included Costilla County, roughly 16 a year. The most common is the flash flood warning (79 from 2016 to 2025). No tornado warnings were recorded here in that period. 7 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 Costilla County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Conejos County, Alamosa County, Taos County, Las Animas County.
Costilla County alert history
Alert events that included Costilla County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Flash Flood Warning | 79 | 0 | August 23, 2025 |
| Flood Advisory | 33 | 0 | September 6, 2019 |
| Severe Thunderstorm Warning | 28 | 5 | October 12, 2026 |
| Snow Squall Warning | 12 | 2 | February 20, 2026 |
| Severe Thunderstorm Watch | 4 | 1 | August 26, 2026 |
| Dust Storm Warning | 1 | 3 | July 8, 2026 |
| Flood Warning | 1 | 4 | November 5, 2026 |
Tornado history in Costilla County
7 tornadoes have been recorded in Costilla County since 1950. That ranks 35 of 64 counties in Colorado. The most recent was on June 6, 2021 (rated unknown).
Strongest tornadoes in Costilla County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 31, 1955 | F3 | Costilla County | 0.5 mi | 100 yd | 0 | 0 |
| May 5, 1980 | F1 | Costilla County | 2 mi | 27 yd | 0 | 0 |
| June 26, 2006 | F0 | Alamosa County | 5 mi | 100 yd | 0 | 0 |
| July 12, 1970 | F0 | Costilla County | 0.1 mi | 10 yd | 0 | 0 |
| July 15, 1994 | F0 | Costilla County | 0.1 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 6, 2021 | ? | Costilla County | 0.1 mi | 20 yd | 0 | 0 |
| June 26, 2006 | F0 | Alamosa County | 5 mi | 100 yd | 0 | 0 |
| June 30, 1995 | F0 | Costilla County | 0.1 mi | 10 yd | 0 | 0 |
| July 15, 1994 | F0 | Costilla County | 0.1 mi | 10 yd | 0 | 0 |
| May 5, 1980 | F1 | Costilla County | 2 mi | 27 yd | 0 | 0 |
About Costilla County
- Population: 3,686 (2024 estimate)
- State: Colorado
- NOAA Weather Radio SAME code: 008023 (how to use it)