Alert archive / Utah / Sevier County
Weather alerts in Sevier County, Utah, 2024
107 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sevier County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 107
- Warnings
- 24
- Watches
- 29
- Advisories
- 34
- Busiest month
- June18 alerts
- Busiest day
- June 27, 20249 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sevier County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 0 | 100% | 3 | 0% | |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Salt Lake City, UT: severe thunderstorm warnings | 100 | 37 | 63% | 272 | 25% | 16 min |
| NWS Salt Lake City, UT: flash flood warnings | 68 | 34 | 50% | 58 | 69% | 97 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 |
|---|---|---|---|
| Jan 4, 2:01 PM MST | Winter Weather Advisory | SLC | 33 hr |
| Jan 5, 2:03 PM MST | Winter Storm Watch | SLC | 24 hr |
| Jan 6, 1:37 PM MST | Winter Storm Warning | SLC | 39 hr |
| Jan 8, 1:59 PM MST | Winter Weather Advisory | SLC | 64 hr |
| Jan 10, 1:37 PM MST | Winter Storm Watch | SLC | 38 hr |
| Jan 11, 3:53 PM MST | Winter Storm Warning | SLC | 4 days |
| Jan 16, 2:04 AM MST | Winter Weather Advisory | SLC | 54 hr |
| Jan 24, 3:03 AM MST | Winter Weather Advisory | SLC | 48 hr |
| Jan 31, 2:38 AM MST | Winter Weather Advisory | SLC | 4 days |
| Feb 4, 2:22 PM MST | Winter Storm Watch | SLC | 37 hr |
| Feb 5, 2:45 PM MST | Winter Storm Warning | SLC | 3 days |
| Feb 7, 1:47 PM MST | Winter Weather Advisory | SLC | 37 hr |
| Feb 9, 1:33 PM MST | Winter Weather Advisory | SLC | 13 hr |
| Feb 19, 2:43 AM MST | Winter Weather Advisory | SLC | 71 hr |
| Feb 24, 2:57 AM MST | Winter Storm Watch | SLC | 24 hr |
| Feb 25, 3:01 AM MST | Winter Storm Warning | SLC | 62 hr |
| Feb 25, 3:04 AM MST | Wind Advisory | SLC | 53 hr |
| Feb 28, 1:49 PM MST | High Wind Watch | SLC | 24 hr |
| Feb 28, 1:49 PM MST | Wind Advisory | SLC | 3 days |
| Feb 29, 3:07 AM MST | Winter Storm Watch | SLC | 34 hr |
| Feb 29, 3:07 AM MST | Winter Storm Warning | SLC | 4 days |
| Feb 29, 2:08 PM MST | High Wind Watch | SLC | 13 hr |
| Feb 29, 2:08 PM MST | High Wind Warning | SLC | 69 hr |
| Mar 1, 1:09 PM MST | Winter Weather Advisory | SLC | 62 hr |
| Mar 11, 1:20 PM MDT | Winter Weather Advisory | SLC | 5 days |
| Mar 12, 3:33 PM MDT | Winter Storm Watch | SLC | 35 hr |
| Mar 13, 2:44 PM MDT | Wind Advisory | SLC | 45 hr |
| Mar 13, 2:51 PM MDT | Winter Storm Warning | SLC | 3 days |
| Mar 23, 2:50 AM MDT | Winter Weather Advisory | SLC | 44 hr |
| Apr 3, 2:07 PM MDT | High Wind Watch | SLC | 24 hr |
| Apr 4, 2:08 PM MDT | Wind Advisory | SLC | 31 hr |
| Apr 5, 3:13 AM MDT | Winter Weather Advisory | SLC | 45 hr |
| Apr 9, 9:28 PM MDT | Flash Flood Watch | SLC | 67 hr |
| Apr 14, 2:33 PM MDT | Winter Weather Advisory | SLC | 30 hr |
| Apr 25, 1:15 PM MDT | Winter Weather Advisory | SLC | 62 hr |
| May 3, 2:16 PM MDT | Wind Advisory | SLC | 56 hr |
| May 3, 2:35 PM MDT | High Wind Watch | SLC | 24 hr |
| May 6, 1:10 PM MDT | Freeze Watch | SLC | 20 hr |
| May 7, 9:03 AM MDT | Freeze Warning | SLC | 25 hr |
| May 25, 1:47 PM MDT | Special Weather Statement | SLC | 28 min |
| Jun 4, 3:24 PM MDT | Heat Advisory | SLC | 3 days |
| Jun 7, 3:42 PM MDT | Special Weather Statement | SLC | 48 min |
| Jun 17, 2:53 AM MDT | Wind Advisory | SLC | 24 hr |
| Jun 20, 2:11 AM MDT | Flood Watch | SLC | 42 hr |
| Jun 21, 11:10 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 12:02 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 21, 2:39 PM MDT | Severe Thunderstorm Warning | SLC | 36 min |
| Jun 22, 2:07 AM MDT | Heat Advisory | SLC | 43 hr |
| Jun 24, 9:22 AM MDT | Heat Advisory | SLC | 38 hr |
| Jun 26, 8:01 PM MDT | Special Weather Statement | SLC | 29 min |
| Jun 27, 12:43 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 1:17 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 27, 1:47 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Jun 27, 3:33 PM MDT | Special Weather Statement | SLC | 27 min |
| Jun 27, 4:10 PM MDT | Special Weather Statement | SLC | 35 min |
| Jun 27, 4:12 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 27, 4:18 PM MDT | Special Weather Statement | SLC | 27 min |
| Jun 27, 4:48 PM MDT | Special Weather Statement | SLC | 27 min |
| Jul 3, 12:48 PM MDT | Excessive Heat Warning | SLC | 10 days |
| Jul 5, 2:20 PM MDT | Red Flag Warning | SLC | 55 hr |
| Jul 7, 1:37 PM MDT | Excessive Heat Watch | SLC | 24 hr |
| Jul 8, 11:04 AM MDT | Red Flag Warning | SLC | 58 hr |
| Jul 8, 2:05 PM MDT | Excessive Heat Watch | SLC | 48 hr |
| Jul 11, 1:34 PM MDT | Fire Weather Watch | SLC | 25 hr |
| Jul 12, 2:34 PM MDT | Red Flag Warning | SLC | 54 hr |
| Jul 13, 2:14 PM MDT | Special Weather Statement | SLC | 46 min |
| Jul 13, 2:33 PM MDT | Red Flag Warning | SLC | 30 hr |
| Jul 14, 3:03 PM MDT | Special Weather Statement | SLC | 42 min |
| Jul 25, 2:32 AM MDT | Fire Weather Watch | SLC | 35 hr |
| Jul 26, 1:39 PM MDT | Red Flag Warning | SLC | 4 days |
| Jul 28, 1:44 PM MDT | Red Flag Warning | SLC | 56 hr |
| Aug 2, 2:10 AM MDT | Heat Advisory | SLC | 43 hr |
| Aug 3, 1:00 PM MDT | Heat Advisory | SLC | 3 days |
| Aug 8, 1:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 10, 2:18 PM MDT | Flood Watch | SLC | 34 hr |
| Aug 11, 2:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 11, 5:47 PM MDT | Special Weather Statement | SLC | 43 min |
| Aug 11, 7:25 PM MDT | Severe Thunderstorm Warning | SLC | 50 min |
| Aug 11, 9:04 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Aug 16, 11:27 AM MDT | Flood Watch | SLC | 35 hr |
| Aug 17, 11:52 AM MDT | Mesoscale Discussion | SPC | 113 min |
| Aug 17, 1:01 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 17, 3:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 18, 10:08 AM MDT | Flood Watch | SLC | 12 hr |
| Aug 18, 12:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 21, 12:59 PM MDT | Flood Watch | SLC | 35 hr |
| Aug 22, 11:45 AM MDT | Wind Advisory | SLC | 58 hr |
| Aug 22, 2:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 12:56 PM MDT | Special Weather Statement | SLC | 49 min |
| Oct 3, 12:25 PM MDT | Red Flag Warning | SLC | 33 hr |
| Oct 16, 2:39 AM MDT | Winter Storm Watch | SLC | 13 hr |
| Oct 16, 2:39 AM MDT | Winter Storm Warning | SLC | 3 days |
| Oct 16, 2:44 AM MDT | Freeze Watch | SLC | 24 hr |
| Oct 16, 2:44 AM MDT | Freeze Watch | SLC | 47 hr |
| Oct 17, 2:32 AM MDT | Freeze Warning | SLC | 30 hr |
| Oct 27, 2:15 PM MDT | Winter Weather Advisory | SLC | 64 hr |
| Oct 28, 10:25 AM MDT | Freeze Watch | SLC | 17 hr |
| Oct 29, 3:07 AM MDT | Freeze Warning | SLC | 31 hr |
| Nov 1, 3:12 PM MDT | Winter Weather Advisory | SLC | 51 hr |
| Nov 11, 3:25 AM MST | Winter Weather Advisory | SLC | 40 hr |
| Nov 12, 2:37 AM MST | Wind Advisory | SLC | 18 hr |
| Nov 22, 2:09 PM MST | Winter Weather Advisory | SLC | 46 hr |
| Nov 24, 2:52 PM MST | Winter Storm Watch | SLC | 12 hr |
| Nov 25, 3:02 AM MST | Winter Storm Warning | SLC | 53 hr |
| Nov 25, 3:02 AM MST | Winter Weather Advisory | SLC | 43 hr |
| Dec 25, 2:25 PM MST | Winter Weather Advisory | SLC | 54 hr |
| Dec 29, 2:57 AM MST | Winter Weather Advisory | SLC | 32 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.