Alert archive / Utah / Grand County
Weather alerts in Grand County, Utah, 2025
143 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Grand County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 143
- Warnings
- 57
- Watches
- 29
- Advisories
- 22
- Busiest month
- September49 alerts
- Busiest day
- September 12, 202536 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Grand County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 22 | 4 | 82% | 2 | 100% | 33 min |
| Flash flood warnings | 5 | 0 | 100% | 1 | 0% |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: tornado warnings | 5 | 1 | 80% | 3 | 33% | 19 min |
| NWS Grand Junction, CO: severe thunderstorm warnings | 72 | 12 | 83% | 35 | 49% | 16 min |
| NWS Grand Junction, CO: flash flood warnings | 44 | 10 | 77% | 31 | 48% | 73 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 12, 2:48 AM MST | Winter Storm Watch | GJT | 24 hr |
| Feb 13, 2:52 AM MST | Winter Storm Warning | GJT | 63 hr |
| Feb 13, 2:52 AM MST | Winter Weather Advisory | GJT | 48 hr |
| Mar 5, 1:48 AM MST | Winter Storm Watch | GJT | 12 hr |
| Mar 5, 1:50 PM MST | Wind Advisory | GJT | 30 hr |
| Mar 5, 1:54 PM MST | Winter Storm Warning | GJT | 49 hr |
| Mar 5, 1:54 PM MST | Winter Weather Advisory | GJT | 45 hr |
| Mar 12, 2:39 AM MDT | Winter Weather Advisory | GJT | 63 hr |
| Mar 30, 3:03 AM MDT | Wind Advisory | GJT | 50 hr |
| Mar 31, 3:45 AM MDT | Freeze Watch | GJT | 10 hr |
| Mar 31, 1:42 PM MDT | Freeze Warning | GJT | 42 hr |
| Apr 1, 1:09 PM MDT | Freeze Watch | GJT | 25 hr |
| Apr 2, 2:08 PM MDT | Winter Weather Advisory | GJT | 34 hr |
| Apr 2, 2:09 PM MDT | Freeze Warning | GJT | 19 hr |
| Apr 3, 1:29 PM MDT | Freeze Warning | GJT | 20 hr |
| Apr 5, 4:10 AM MDT | Freeze Watch | GJT | 9 hr |
| Apr 5, 1:20 PM MDT | Freeze Warning | GJT | 20 hr |
| Apr 16, 2:44 PM MDT | Winter Weather Advisory | GJT | 3 days |
| May 5, 5:25 PM MDT | Special Weather Statement | GJT | 35 min |
| May 5, 6:08 PM MDT | Special Weather Statement | GJT | 37 min |
| May 11, 12:41 PM MDT | Wind Advisory | GJT | 31 hr |
| May 12, 7:32 AM MDT | Wind Advisory | GJT | 37 hr |
| May 16, 1:57 AM MDT | Fire Weather Watch | GJT | 11 hr |
| May 16, 1:15 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 18, 2:26 PM MDT | Special Weather Statement | GJT | 34 min |
| May 21, 2:29 PM MDT | Fire Weather Watch | GJT | 13 hr |
| May 21, 2:29 PM MDT | Red Flag Warning | GJT | 30 hr |
| May 22, 3:19 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 4, 10:49 AM MDT | Flood Watch | GJT | 13 hr |
| Jun 4, 12:03 PM MDT | Flash Flood Warning | GJT | 87 min |
| Jun 4, 2:26 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jun 4, 4:23 PM MDT | Flash Flood Warning | GJT | 2 hr |
| Jun 4, 4:44 PM MDT | Areal Flood Advisory | GJT | 113 min |
| Jun 5, 9:36 PM MDT | Special Weather Statement | GJT | 24 min |
| Jun 6, 1:55 PM MDT | Special Weather Statement | GJT | 35 min |
| Jun 6, 2:04 PM MDT | Severe Thunderstorm Warning | GJT | 26 min |
| Jun 14, 2:28 AM MDT | Fire Weather Watch | GJT | 12 hr |
| Jun 14, 2:27 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 15, 2:15 AM MDT | Fire Weather Watch | GJT | 11 hr |
| Jun 15, 1:44 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 18, 1:48 AM MDT | Fire Weather Watch | GJT | 13 hr |
| Jun 18, 2:17 PM MDT | Heat Advisory | GJT | 34 hr |
| Jun 18, 2:26 PM MDT | Fire Weather Watch | GJT | 11 hr |
| Jun 18, 2:26 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 18, 2:26 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 19, 1:36 AM MDT | Red Flag Warning | GJT | 45 hr |
| Jun 19, 1:34 PM MDT | Wind Advisory | GJT | 32 hr |
| Jun 19, 1:40 PM MDT | Red Flag Warning | GJT | 56 hr |
| Jun 20, 1:41 AM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 20, 1:29 PM MDT | Wind Advisory | GJT | 33 hr |
| Jun 21, 1:24 AM MDT | Red Flag Warning | GJT | 44 hr |
| Jun 22, 2:48 PM MDT | Fire Weather Watch | GJT | 11 hr |
| Jun 23, 1:28 AM MDT | Red Flag Warning | GJT | 43 hr |
| Jul 3, 5:39 PM MDT | Areal Flood Advisory | GJT | 51 min |
| Jul 8, 1:37 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Jul 9, 2:11 AM MDT | Red Flag Warning | GJT | 42 hr |
| Jul 25, 2:05 AM MDT | Fire Weather Watch | GJT | 11 hr |
| Jul 25, 1:04 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Jul 25, 1:04 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jul 26, 2:27 AM MDT | Red Flag Warning | GJT | 42 hr |
| Jul 30, 3:35 AM MDT | Fire Weather Watch | GJT | 11 hr |
| Jul 30, 2:07 PM MDT | Red Flag Warning | GJT | 30 hr |
| Aug 1, 3:33 AM MDT | Fire Weather Watch | GJT | 10 hr |
| Aug 1, 1:22 PM MDT | Red Flag Warning | GJT | 30 hr |
| Aug 2, 1:26 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Aug 3, 1:18 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Aug 3, 1:18 PM MDT | Red Flag Warning | GJT | 32 hr |
| Aug 4, 1:48 AM MDT | Red Flag Warning | GJT | 42 hr |
| Aug 4, 1:33 PM MDT | Red Flag Warning | GJT | 54 hr |
| Aug 5, 2:15 AM MDT | Fire Weather Watch | GJT | 12 hr |
| Aug 5, 2:25 PM MDT | Red Flag Warning | GJT | 54 hr |
| Aug 5, 2:25 PM MDT | Red Flag Warning | GJT | 3 days |
| Aug 7, 1:21 PM MDT | Red Flag Warning | GJT | 55 hr |
| Aug 12, 2:12 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Aug 12, 2:12 PM MDT | Fire Weather Watch | GJT | 48 hr |
| Aug 13, 1:05 PM MDT | Red Flag Warning | GJT | 31 hr |
| Aug 25, 2:42 PM MDT | Flood Watch | GJT | 35 hr |
| Aug 25, 4:35 PM MDT | Special Weather Statement | GJT | 25 min |
| Aug 25, 5:26 PM MDT | Special Weather Statement | GJT | 34 min |
| Aug 26, 3:17 PM MDT | Severe Thunderstorm Warning | GJT | 28 min |
| Aug 26, 8:24 PM MDT | Special Weather Statement | GJT | 21 min |
| Aug 26, 9:30 PM MDT | Special Weather Statement | GJT | 30 min |
| Sep 10, 12:50 PM MDT | Flood Watch | GJT | 59 hr |
| Sep 11, 3:23 PM MDT | Special Weather Statement | GJT | 37 min |
| Sep 12, 8:05 AM MDT | Severe Thunderstorm Warning | GJT | 40 min |
| Sep 12, 8:25 AM MDT | Special Weather Statement | GJT | 35 min |
| Sep 12, 8:35 AM MDT | Areal Flood Advisory | GJT | 115 min |
| Sep 12, 8:42 AM MDT | Severe Thunderstorm Warning | GJT | 33 min |
| Sep 12, 8:50 AM MDT | Special Weather Statement | GJT | 25 min |
| Sep 12, 9:02 AM MDT | Severe Thunderstorm Warning | GJT | 43 min |
| Sep 12, 9:12 AM MDT | Severe Thunderstorm Warning | GJT | 33 min |
| Sep 12, 9:16 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 9:43 AM MDT | Flash Flood Warning | GJT | 5 hr |
| Sep 12, 9:44 AM MDT | Severe Thunderstorm Warning | GJT | 31 min |
| Sep 12, 9:44 AM MDT | Severe Thunderstorm Warning | GJT | 31 min |
| Sep 12, 9:54 AM MDT | Areal Flood Warning | GJT | 51 min |
| Sep 12, 10:08 AM MDT | Special Weather Statement | GJT | 22 min |
| Sep 12, 10:14 AM MDT | Special Weather Statement | GJT | 31 min |
| Sep 12, 10:15 AM MDT | Severe Thunderstorm Warning | GJT | 30 min |
| Sep 12, 10:23 AM MDT | Severe Thunderstorm Warning | GJT | 37 min |
| Sep 12, 10:52 AM MDT | Severe Thunderstorm Warning | GJT | 23 min |
| Sep 12, 11:12 AM MDT | Severe Thunderstorm Warning | GJT | 33 min |
| Sep 12, 11:21 AM MDT | Severe Thunderstorm Warning | GJT | 24 min |
| Sep 12, 11:46 AM MDT | Special Weather Statement | GJT | 29 min |
| Sep 12, 12:12 PM MDT | Special Weather Statement | GJT | 33 min |
| Sep 12, 12:22 PM MDT | Special Weather Statement | GJT | 23 min |
| Sep 12, 12:30 PM MDT | Severe Thunderstorm Warning | GJT | 30 min |
| Sep 12, 12:32 PM MDT | Severe Thunderstorm Warning | GJT | 15 min |
| Sep 12, 12:40 PM MDT | Special Weather Statement | GJT | 35 min |
| Sep 12, 12:51 PM MDT | Severe Thunderstorm Warning | GJT | 24 min |
| Sep 12, 12:55 PM MDT | Severe Thunderstorm Warning | GJT | 35 min |
| Sep 12, 1:08 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Sep 12, 1:13 PM MDT | Special Weather Statement | GJT | 32 min |
| Sep 12, 1:18 PM MDT | Areal Flood Warning | GJT | 87 min |
| Sep 12, 1:24 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 12, 1:27 PM MDT | Special Weather Statement | GJT | 33 min |
| Sep 12, 1:42 PM MDT | Severe Thunderstorm Warning | GJT | 33 min |
| Sep 12, 1:43 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Sep 12, 2:12 PM MDT | Special Weather Statement | GJT | 33 min |
| Sep 12, 2:28 PM MDT | Severe Thunderstorm Warning | GJT | 32 min |
| Sep 13, 3:25 AM MDT | Flood Watch | GJT | 21 hr |
| Sep 13, 7:01 AM MDT | Special Weather Statement | GJT | 29 min |
| Sep 13, 7:07 AM MDT | Severe Thunderstorm Warning | GJT | 23 min |
| Sep 13, 7:34 AM MDT | Special Weather Statement | GJT | 26 min |
| Sep 13, 8:06 AM MDT | Special Weather Statement | GJT | 24 min |
| Sep 13, 12:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Sep 13, 1:54 PM MDT | Severe Thunderstorm Warning | GJT | 18 min |
| Sep 13, 2:17 PM MDT | Special Weather Statement | GJT | 13 min |
| Sep 13, 2:19 PM MDT | Special Weather Statement | GJT | 26 min |
| Sep 13, 2:51 PM MDT | Areal Flood Advisory | GJT | 114 min |
| Sep 16, 3:50 PM MDT | Severe Thunderstorm Warning | GJT | 25 min |
| Oct 8, 1:27 PM MDT | Flood Watch | GJT | 4 days |
| Oct 12, 12:03 AM MDT | Special Weather Statement | GJT | 27 min |
| Oct 12, 12:40 AM MDT | Special Weather Statement | GJT | 35 min |
| Oct 13, 8:36 PM MDT | Special Weather Statement | GJT | 24 min |
| Oct 23, 2:06 PM MDT | Special Weather Statement | GJT | 24 min |
| Oct 23, 2:10 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Oct 23, 2:21 PM MDT | Special Weather Statement | GJT | 24 min |
| Nov 19, 12:37 AM MST | Winter Weather Advisory | GJT | 46 hr |
| Nov 20, 3:37 AM MST | Dense Fog Advisory | GJT | 4 min |
| Nov 20, 4:21 AM MST | Special Weather Statement | GJT | 4 hr |
| Nov 29, 12:23 PM MST | Winter Weather Advisory | GJT | 42 hr |
| Dec 26, 2:04 AM MST | Winter Weather Advisory | GJT | 56 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 22 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 32 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 5 |
| Flood Watch | 5 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 3 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 22 |
| Fire Weather Watch | 19 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.