Alert archive / Utah / Grand County
Weather alerts in Grand County, Utah, 2026
132 weather alerts in 2026, 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 2026. Tap one for its archive.
- Alerts
- 132
- Warnings
- 49
- Watches
- 26
- Advisories
- 28
- Busiest month
- June34 alerts
- Busiest day
- August 30, 20268 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, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 0 | 100% | 2 | 0% | |
| Flash flood warnings | 14 | 4 | 71% | 8 | 38% | 131 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| NWS Grand Junction, CO: severe thunderstorm warnings | 45 | 5 | 89% | 28 | 39% | 22 min |
| NWS Grand Junction, CO: flash flood warnings | 132 | 27 | 80% | 103 | 45% | 75 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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 |
|---|---|---|---|
| Jan 3, 2:02 AM MST | Dense Fog Advisory | GJT | 9 hr |
| Jan 3, 7:21 PM MST | Dense Fog Advisory | GJT | 16 hr |
| Jan 7, 2:29 AM MST | Winter Weather Advisory | GJT | 57 hr |
| Jan 21, 1:58 PM MST | Winter Weather Advisory | GJT | 3 days |
| Feb 15, 12:21 PM MST | Winter Weather Advisory | GJT | 4 days |
| Feb 15, 1:38 PM MST | Wind Advisory | GJT | 51 hr |
| Feb 17, 2:39 AM MST | Special Weather Statement | GJT | 36 min |
| Feb 17, 11:06 AM MST | Wind Advisory | GJT | 30 hr |
| Feb 19, 11:24 AM MST | Winter Weather Advisory | GJT | 33 hr |
| Mar 13, 10:57 AM MDT | Wind Advisory | GJT | 56 hr |
| Apr 1, 12:20 PM MDT | Freeze Watch | GJT | 23 hr |
| Apr 1, 12:20 PM MDT | Wind Advisory | GJT | 33 hr |
| Apr 1, 2:31 PM MDT | Special Weather Statement | GJT | 29 min |
| Apr 1, 3:01 PM MDT | Special Weather Statement | GJT | 29 min |
| Apr 2, 11:24 AM MDT | Freeze Warning | GJT | 23 hr |
| Apr 2, 11:31 AM MDT | Freeze Watch | GJT | 23 hr |
| Apr 3, 10:57 AM MDT | Freeze Warning | GJT | 23 hr |
| Apr 11, 2:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 2:55 PM MDT | Special Weather Statement | GJT | 35 min |
| Apr 15, 10:00 AM MDT | Freeze Watch | GJT | 25 hr |
| Apr 15, 12:37 PM MDT | Wind Advisory | GJT | 31 hr |
| Apr 16, 10:33 AM MDT | Freeze Warning | GJT | 47 hr |
| Apr 20, 3:10 PM MDT | Wind Advisory | GJT | 54 hr |
| May 14, 10:38 AM MDT | Fire Weather Watch | GJT | 24 hr |
| May 14, 10:38 AM MDT | Red Flag Warning | GJT | 33 hr |
| May 15, 10:39 AM MDT | Red Flag Warning | GJT | 33 hr |
| May 20, 8:42 PM MDT | Red Flag Warning | GJT | 24 hr |
| May 25, 12:28 PM MDT | Fire Weather Watch | GJT | 23 hr |
| May 26, 11:51 AM MDT | Fire Weather Watch | GJT | 24 hr |
| May 26, 11:51 AM MDT | Red Flag Warning | GJT | 32 hr |
| May 27, 12:12 PM MDT | Fire Weather Watch | GJT | 23 hr |
| May 27, 12:12 PM MDT | Red Flag Warning | GJT | 32 hr |
| May 28, 11:19 AM MDT | Red Flag Warning | GJT | 33 hr |
| Jun 3, 10:10 AM MDT | Red Flag Warning | GJT | 33 hr |
| Jun 4, 11:25 AM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 5, 10:47 AM MDT | Fire Weather Watch | GJT | 49 hr |
| Jun 5, 10:47 AM MDT | Red Flag Warning | GJT | 34 hr |
| Jun 5, 10:47 AM MDT | Red Flag Warning | GJT | 59 hr |
| Jun 7, 11:38 AM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 7, 11:38 AM MDT | Red Flag Warning | GJT | 33 hr |
| Jun 7, 11:38 AM MDT | Red Flag Warning | GJT | 58 hr |
| Jun 8, 11:17 AM MDT | Red Flag Warning | GJT | 59 hr |
| Jun 10, 11:51 AM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 11, 10:23 AM MDT | Red Flag Warning | GJT | 35 hr |
| Jun 14, 10:01 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Jun 15, 10:36 AM MDT | Fire Weather Watch | GJT | 25 hr |
| Jun 15, 10:36 AM MDT | Red Flag Warning | GJT | 34 hr |
| Jun 16, 11:46 AM MDT | Red Flag Warning | GJT | 33 hr |
| Jun 18, 12:11 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 19, 11:41 AM MDT | Red Flag Warning | GJT | 34 hr |
| Jun 21, 10:15 PM MDT | Fire Weather Watch | GJT | 14 hr |
| Jun 22, 11:46 AM MDT | Red Flag Warning | GJT | 34 hr |
| Jun 23, 2:03 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 24, 1:01 PM MDT | Red Flag Warning | GJT | 3 days |
| Jun 25, 11:08 AM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 25, 2:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 26, 10:42 AM MDT | Wind Advisory | GJT | 35 hr |
| Jun 26, 10:58 AM MDT | Red Flag Warning | GJT | 59 hr |
| Jun 27, 11:57 AM MDT | Wind Advisory | GJT | 33 hr |
| Jun 27, 12:05 PM MDT | Fire Weather Watch | GJT | 34 hr |
| Jun 28, 12:07 AM MDT | Red Flag Warning | GJT | 3 hr |
| Jun 28, 10:04 PM MDT | Fire Weather Watch | GJT | 14 hr |
| Jun 28, 10:04 PM MDT | Red Flag Warning | GJT | 22 hr |
| Jun 29, 11:43 AM MDT | Red Flag Warning | GJT | 33 hr |
| Jun 29, 9:46 PM MDT | Fire Weather Watch | GJT | 16 hr |
| Jun 30, 1:19 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 30, 1:19 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jul 1, 12:34 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jul 8, 1:38 PM MDT | Extreme Heat Watch | GJT | 23 hr |
| Jul 9, 12:30 PM MDT | Extreme Heat Warning | GJT | 4 days |
| Jul 16, 5:50 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 16, 6:37 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 19, 8:23 PM MDT | Flash Flood Warning | GJT | 101 min |
| Jul 20, 9:08 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 21, 9:59 AM MDT | Flood Watch | GJT | 11 hr |
| Jul 21, 2:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 6:26 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 21, 7:11 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Jul 22, 1:17 AM MDT | Flood Watch | GJT | 26 hr |
| Jul 22, 2:28 PM MDT | Flash Flood Warning | GJT | 6 hr |
| Jul 22, 9:48 PM MDT | Areal Flood Advisory | GJT | 117 min |
| Jul 26, 1:18 AM MDT | Heat Advisory | GJT | 53 hr |
| Jul 26, 5:38 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 27, 12:38 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 27, 10:03 PM MDT | Special Weather Statement | GJT | 27 min |
| Jul 28, 9:03 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 28, 10:27 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 29, 4:48 PM MDT | Special Weather Statement | GJT | 27 min |
| Jul 29, 5:19 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 29, 5:20 PM MDT | Special Weather Statement | GJT | 40 min |
| Jul 29, 5:29 PM MDT | Severe Thunderstorm Warning | GJT | 31 min |
| Jul 29, 5:44 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 29, 6:11 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 30, 11:53 AM MDT | Heat Advisory | GJT | 5 days |
| Jul 30, 11:53 AM MDT | Extreme Heat Warning | GJT | 4 days |
| Aug 2, 10:10 PM MDT | Red Flag Warning | GJT | 22 hr |
| Aug 6, 10:11 AM MDT | Heat Advisory | GJT | 34 hr |
| Aug 6, 10:18 AM MDT | Heat Advisory | GJT | 58 hr |
| Aug 7, 12:13 PM MDT | Heat Advisory | GJT | 31 hr |
| Aug 13, 12:36 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 29, 9:41 AM MDT | Special Weather Statement | GJT | 49 min |
| Aug 29, 2:04 PM MDT | Severe Thunderstorm Warning | GJT | 26 min |
| Aug 30, 4:18 AM MDT | Flood Watch | GJT | 41 hr |
| Aug 30, 6:28 AM MDT | Special Weather Statement | GJT | 32 min |
| Aug 30, 12:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 30, 3:28 PM MDT | Special Weather Statement | GJT | 32 min |
| Aug 30, 4:10 PM MDT | Special Weather Statement | GJT | 35 min |
| Aug 30, 4:37 PM MDT | Special Weather Statement | GJT | 23 min |
| Aug 30, 4:58 PM MDT | Special Weather Statement | GJT | 32 min |
| Aug 30, 5:19 PM MDT | Flash Flood Warning | GJT | 86 min |
| Sep 2, 9:59 AM MDT | Special Weather Statement | GJT | 31 min |
| Sep 2, 11:52 AM MDT | Special Weather Statement | GJT | 38 min |
| Sep 2, 1:09 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 8:00 PM MDT | Severe Thunderstorm Warning | GJT | 30 min |
| Sep 12, 8:26 PM MDT | Severe Thunderstorm Warning | GJT | 19 min |
| Sep 12, 8:43 PM MDT | Special Weather Statement | GJT | 32 min |
| Sep 12, 9:14 PM MDT | Special Weather Statement | GJT | 31 min |
| Sep 15, 10:44 AM MDT | Flood Watch | GJT | 61 hr |
| Sep 15, 5:30 PM MDT | Special Weather Statement | GJT | 30 min |
| Sep 15, 5:31 PM MDT | Flash Flood Warning | GJT | 4 hr |
| Sep 15, 5:51 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Sep 15, 5:57 PM MDT | Special Weather Statement | GJT | 33 min |
| Sep 15, 6:34 PM MDT | Areal Flood Advisory | GJT | 4 hr |
| Sep 16, 2:22 PM MDT | Special Weather Statement | GJT | 23 min |
| Sep 16, 2:37 PM MDT | Special Weather Statement | GJT | 23 min |
| Sep 16, 2:54 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Sep 16, 11:27 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Sep 18, 2:31 PM MDT | Special Weather Statement | GJT | 29 min |
| Sep 18, 2:58 PM MDT | Severe Thunderstorm Warning | GJT | 32 min |
| Sep 19, 1:16 AM MDT | Special Weather Statement | GJT | 29 min |
| Sep 19, 1:49 AM MDT | Areal Flood Advisory | GJT | 116 min |
| Sep 22, 3:28 PM MDT | Special Weather Statement | GJT | 32 min |
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 | 5 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 24 |
| Flooding | |
| Flash Flood Warning | 14 |
| Flood Watch | 4 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Weather Advisory | 4 |
| Heat | |
| Extreme Heat Warning | 2 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 25 |
| Fire Weather Watch | 18 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.