Alert archive / Utah / Grand County
Weather alerts in Grand County, Utah, 2022
169 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 169
- Warnings
- 46
- Watches
- 31
- Advisories
- 49
- Busiest month
- August31 alerts
- Busiest day
- October 2, 202217 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, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 0 | 100% | 2 | 0% | |
| Flash flood warnings | 11 | 3 | 73% | 7 | 43% | 92 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: severe thunderstorm warnings | 29 | 5 | 83% | 13 | 38% | 17 min |
| NWS Grand Junction, CO: flash flood warnings | 61 | 12 | 80% | 38 | 63% | 45 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 20, 3:31 PM MST | Winter Storm Warning | GJT | 4 days |
| Feb 20, 3:31 PM MST | Winter Weather Advisory | GJT | 4 days |
| Feb 21, 9:53 AM MST | Winter Storm Watch | GJT | 17 hr |
| Mar 3, 2:13 PM MST | Winter Weather Advisory | GJT | 4 days |
| Mar 4, 2:29 PM MST | Special Weather Statement | GJT | 31 min |
| Mar 4, 3:15 PM MST | Special Weather Statement | GJT | 30 min |
| Mar 5, 5:40 PM MST | Special Weather Statement | GJT | 50 min |
| Mar 27, 2:43 PM MDT | Winter Weather Advisory | GJT | 69 hr |
| Apr 4, 3:11 AM MDT | Wind Advisory | GJT | 42 hr |
| Apr 4, 2:02 PM MDT | Freeze Watch | GJT | 13 hr |
| Apr 5, 3:06 AM MDT | Freeze Warning | GJT | 30 hr |
| Apr 6, 2:32 AM MDT | Freeze Warning | GJT | 30 hr |
| Apr 10, 2:31 PM MDT | Wind Advisory | GJT | 39 hr |
| Apr 11, 2:02 PM MDT | Freeze Watch | GJT | 5 hr |
| Apr 11, 6:46 PM MDT | Freeze Warning | GJT | 40 hr |
| Apr 11, 6:46 PM MDT | High Wind Warning | GJT | 11 hr |
| Apr 12, 1:49 PM MDT | Freeze Warning | GJT | 43 hr |
| Apr 13, 10:27 AM MDT | Red Flag Warning | GJT | 10 hr |
| Apr 13, 2:27 PM MDT | Fire Weather Watch | GJT | 11 hr |
| Apr 14, 1:48 AM MDT | Red Flag Warning | GJT | 18 hr |
| Apr 14, 2:02 PM MDT | Fire Weather Watch | GJT | 25 hr |
| Apr 15, 2:47 PM MDT | Wind Advisory | GJT | 30 hr |
| Apr 15, 2:48 PM MDT | Red Flag Warning | GJT | 29 hr |
| Apr 17, 3:03 PM MDT | Fire Weather Watch | GJT | 12 hr |
| Apr 17, 3:03 PM MDT | Red Flag Warning | GJT | 29 hr |
| Apr 18, 3:22 AM MDT | Red Flag Warning | GJT | 43 hr |
| Apr 18, 3:30 AM MDT | Wind Advisory | GJT | 42 hr |
| Apr 19, 2:48 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Apr 20, 2:29 PM MDT | Red Flag Warning | GJT | 31 hr |
| Apr 21, 1:44 AM MDT | Wind Advisory | GJT | 40 hr |
| Apr 22, 6:17 PM MDT | Special Weather Statement | GJT | 28 min |
| Apr 29, 1:23 AM MDT | Wind Advisory | GJT | 20 hr |
| May 6, 2:21 PM MDT | Wind Advisory | GJT | 31 hr |
| May 7, 3:10 AM MDT | Wind Advisory | GJT | 54 hr |
| May 7, 5:02 PM MDT | Special Weather Statement | GJT | 28 min |
| May 9, 2:04 PM MDT | Wind Advisory | GJT | 30 hr |
| May 10, 2:50 AM MDT | Wind Advisory | GJT | 42 hr |
| May 11, 3:03 AM MDT | High Wind Warning | GJT | 18 hr |
| May 18, 2:04 AM MDT | Red Flag Warning | GJT | 46 hr |
| May 18, 6:28 PM MDT | Wind Advisory | GJT | 28 hr |
| May 20, 3:16 AM MDT | Red Flag Warning | GJT | 18 hr |
| May 21, 3:12 AM MDT | Fire Weather Watch | GJT | 11 hr |
| May 21, 2:07 PM MDT | Red Flag Warning | GJT | 29 hr |
| May 22, 2:37 PM MDT | Fire Weather Watch | GJT | 20 hr |
| May 23, 10:45 AM MDT | Red Flag Warning | GJT | 34 hr |
| May 25, 1:21 PM MDT | Fire Weather Watch | GJT | 15 hr |
| May 25, 1:21 PM MDT | Fire Weather Watch | GJT | 24 hr |
| May 26, 4:30 AM MDT | Red Flag Warning | GJT | 41 hr |
| May 26, 1:06 PM MDT | Red Flag Warning | GJT | 56 hr |
| May 27, 1:45 PM MDT | Wind Advisory | GJT | 30 hr |
| May 29, 11:23 AM MDT | Special Weather Statement | GJT | 37 min |
| May 29, 11:52 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 12:22 PM MDT | Special Weather Statement | GJT | 23 min |
| Jun 9, 2:52 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 9, 3:09 PM MDT | Heat Advisory | GJT | 3 days |
| Jun 10, 1:54 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 10, 1:54 PM MDT | Red Flag Warning | GJT | 58 hr |
| Jun 11, 1:22 PM MDT | Red Flag Warning | GJT | 58 hr |
| Jun 12, 3:40 AM MDT | High Wind Watch | GJT | 11 hr |
| Jun 12, 3:40 AM MDT | Wind Advisory | GJT | 17 hr |
| Jun 12, 2:45 PM MDT | High Wind Warning | GJT | 32 hr |
| Jun 12, 2:45 PM MDT | Wind Advisory | GJT | 32 hr |
| Jun 15, 2:06 PM MDT | Fire Weather Watch | GJT | 25 hr |
| Jun 16, 3:09 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 17, 2:56 PM MDT | Fire Weather Watch | GJT | 22 hr |
| Jun 18, 1:01 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jun 19, 10:02 AM MDT | Special Weather Statement | GJT | 28 min |
| Jun 19, 10:21 AM MDT | Special Weather Statement | GJT | 39 min |
| Jun 19, 11:02 AM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 23, 1:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 23, 4:16 PM MDT | Special Weather Statement | GJT | 44 min |
| Jun 29, 2:59 PM MDT | Flood Watch | GJT | 28 hr |
| Jul 2, 1:53 PM MDT | Flash Flood Warning | GJT | 112 min |
| Jul 2, 2:51 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 6, 6:41 PM MDT | Special Weather Statement | GJT | 49 min |
| Jul 14, 10:48 PM MDT | Special Weather Statement | GJT | 42 min |
| Jul 14, 11:47 PM MDT | Special Weather Statement | GJT | 28 min |
| Jul 16, 2:26 PM MDT | Heat Advisory | GJT | 30 hr |
| Jul 16, 3:38 PM MDT | Special Weather Statement | GJT | 37 min |
| Jul 16, 4:10 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 16, 5:27 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Jul 19, 8:33 PM MDT | Special Weather Statement | GJT | 27 min |
| Jul 19, 9:03 PM MDT | Special Weather Statement | GJT | 27 min |
| Jul 20, 2:13 PM MDT | Excessive Heat Watch | GJT | 13 hr |
| Jul 21, 3:19 AM MDT | Heat Advisory | GJT | 65 hr |
| Jul 24, 2:38 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 26, 3:15 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 26, 3:42 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Jul 27, 2:11 AM MDT | Flood Watch | GJT | 22 hr |
| Jul 27, 3:23 PM MDT | Flood Watch | GJT | 31 hr |
| Jul 27, 5:47 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 28, 2:10 PM MDT | Flood Watch | GJT | 32 hr |
| Jul 30, 2:34 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 30, 6:11 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 30, 7:26 PM MDT | Special Weather Statement | GJT | 49 min |
| Jul 31, 10:48 AM MDT | Flash Flood Watch | GJT | 4 hr |
| Jul 31, 2:33 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Aug 1, 11:43 AM MDT | Flash Flood Watch | GJT | 9 hr |
| Aug 10, 4:30 PM MDT | Severe Thunderstorm Warning | GJT | 30 min |
| Aug 11, 6:16 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Aug 11, 6:35 PM MDT | Flash Flood Warning | GJT | 6 hr |
| Aug 11, 6:56 PM MDT | Special Weather Statement | GJT | 34 min |
| Aug 11, 7:03 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Aug 11, 7:18 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 11, 8:47 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 12, 2:58 PM MDT | Flash Flood Watch | GJT | 3 hr |
| Aug 12, 5:06 PM MDT | Areal Flood Advisory | GJT | 108 min |
| Aug 13, 12:29 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 14, 12:09 PM MDT | Flash Flood Watch | GJT | 9 hr |
| Aug 14, 1:31 PM MDT | Special Weather Statement | GJT | 29 min |
| Aug 14, 2:07 PM MDT | Special Weather Statement | GJT | 38 min |
| Aug 14, 2:39 PM MDT | Special Weather Statement | GJT | 36 min |
| Aug 14, 3:55 PM MDT | Special Weather Statement | GJT | 35 min |
| Aug 14, 4:23 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 15, 10:35 AM MDT | Flood Watch | GJT | 11 hr |
| Aug 15, 4:26 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 15, 5:34 PM MDT | Flash Flood Warning | GJT | 4 hr |
| Aug 15, 5:55 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Aug 15, 6:25 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 16, 12:50 PM MDT | Flash Flood Watch | GJT | 6 hr |
| Aug 19, 2:46 AM MDT | Flash Flood Watch | GJT | 16 hr |
| Aug 20, 12:52 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 20, 5:34 PM MDT | Special Weather Statement | GJT | 41 min |
| Aug 20, 7:05 PM MDT | Special Weather Statement | GJT | 25 min |
| Aug 20, 7:10 PM MDT | Flash Flood Warning | GJT | 4 hr |
| Aug 20, 7:10 PM MDT | Special Weather Statement | GJT | 35 min |
| Aug 20, 7:21 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 20, 9:49 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Sep 14, 6:55 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Sep 14, 7:45 PM MDT | Special Weather Statement | GJT | 30 min |
| Sep 19, 1:49 PM MDT | Flood Watch | GJT | 3 days |
| Sep 30, 12:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Sep 30, 1:41 PM MDT | Special Weather Statement | GJT | 34 min |
| Sep 30, 2:17 PM MDT | Special Weather Statement | GJT | 28 min |
| Oct 1, 12:32 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 1, 6:02 PM MDT | Special Weather Statement | GJT | 28 min |
| Oct 1, 6:45 PM MDT | Special Weather Statement | GJT | 30 min |
| Oct 1, 7:17 PM MDT | Special Weather Statement | GJT | 28 min |
| Oct 1, 7:52 PM MDT | Special Weather Statement | GJT | 23 min |
| Oct 1, 8:11 PM MDT | Special Weather Statement | GJT | 34 min |
| Oct 1, 8:49 PM MDT | Special Weather Statement | GJT | 26 min |
| Oct 2, 12:08 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 2, 3:29 PM MDT | Special Weather Statement | GJT | 31 min |
| Oct 2, 3:38 PM MDT | Severe Thunderstorm Warning | GJT | 37 min |
| Oct 2, 3:41 PM MDT | Special Weather Statement | GJT | 34 min |
| Oct 2, 4:03 PM MDT | Severe Thunderstorm Warning | GJT | 27 min |
| Oct 2, 4:28 PM MDT | Severe Thunderstorm Warning | GJT | 32 min |
| Oct 2, 4:30 PM MDT | Severe Thunderstorm Warning | GJT | 30 min |
| Oct 2, 4:31 PM MDT | Severe Thunderstorm Warning | GJT | 29 min |
| Oct 2, 5:01 PM MDT | Severe Thunderstorm Warning | GJT | 44 min |
| Oct 2, 5:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Oct 2, 5:32 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Oct 21, 3:06 PM MDT | Wind Advisory | GJT | 45 hr |
| Oct 22, 4:22 AM MDT | Winter Weather Advisory | GJT | 47 hr |
| Oct 23, 4:37 AM MDT | Freeze Watch | GJT | 4 hr |
| Oct 23, 8:57 AM MDT | Freeze Warning | GJT | 24 hr |
| Oct 23, 8:57 AM MDT | Freeze Warning | GJT | 49 hr |
| Nov 1, 2:08 PM MDT | Winter Weather Advisory | GJT | 64 hr |
| Nov 8, 2:54 AM MST | Winter Weather Advisory | GJT | 57 hr |
| Nov 8, 1:45 PM MST | Wind Advisory | GJT | 27 hr |
| Nov 27, 1:27 PM MST | Winter Weather Advisory | GJT | 46 hr |
| Dec 1, 3:01 AM MST | Wind Advisory | GJT | 35 hr |
| Dec 2, 8:17 AM MST | Snow Squall Warning | GJT | 28 min |
| Dec 5, 2:33 PM MST | Winter Weather Advisory | GJT | 63 hr |
| Dec 11, 2:55 AM MST | Winter Weather Advisory | GJT | 4 days |
| Dec 15, 7:13 AM MST | Winter Weather Advisory | GJT | 4 hr |
| Dec 26, 3:06 AM MST | Winter Storm Watch | GJT | 11 hr |
| Dec 26, 1:56 PM MST | Winter Storm Warning | GJT | 63 hr |
| Dec 26, 1:56 PM MST | Winter Weather Advisory | GJT | 63 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 | 7 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 36 |
| Flooding | |
| Flash Flood Warning | 11 |
| Flash Flood Watch | 6 |
| Flood Watch | 6 |
| Areal Flood Advisory | 18 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 11 |
| Heat | |
| Excessive Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 1 |
| Wind Advisory | 17 |
| Fire | |
| Red Flag Warning | 16 |
| Fire Weather Watch | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.