Alert archive / Utah / Salt Lake County
Weather alerts in Salt Lake County, Utah, 2022
153 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Salt Lake County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 153
- Warnings
- 44
- Watches
- 15
- Advisories
- 50
- Busiest month
- July31 alerts
- Busiest day
- September 21, 20228 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado reports fell inside a warning.
Salt Lake County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 14 | 6 | 57% | 28 | 29% | 20 min |
| Flash flood warnings | 1 | 0 | 100% | 1 | 0% |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Salt Lake City, UT: tornado warnings | 0 | 4 | 0% | |||
| NWS Salt Lake City, UT: severe thunderstorm warnings | 108 | 28 | 74% | 176 | 27% | 22 min |
| NWS Salt Lake City, UT: flash flood warnings | 126 | 44 | 65% | 79 | 68% | 71 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 3, 3:04 PM MST | Winter Weather Advisory | SLC | 62 hr |
| Jan 4, 3:05 PM MST | Winter Storm Warning | SLC | 43 hr |
| Jan 17, 12:46 AM MST | Dense Fog Advisory | SLC | 10 hr |
| Jan 18, 3:42 AM MST | Dense Fog Advisory | SLC | 5 hr |
| Feb 2, 5:45 AM MST | Winter Weather Advisory | SLC | 3 hr |
| Feb 20, 3:12 PM MST | Winter Weather Advisory | SLC | 31 hr |
| Feb 21, 3:55 PM MST | Winter Weather Advisory | SLC | 52 hr |
| Feb 22, 3:46 AM MST | Wind Advisory | SLC | 30 hr |
| Mar 4, 2:51 PM MST | Winter Weather Advisory | SLC | 49 hr |
| Mar 5, 8:19 PM MST | Winter Storm Warning | SLC | 15 hr |
| Mar 7, 2:48 AM MST | Winter Storm Watch | SLC | 13 hr |
| Mar 7, 3:19 PM MST | Winter Storm Warning | SLC | 50 hr |
| Mar 7, 3:19 PM MST | Winter Weather Advisory | SLC | 56 hr |
| Mar 18, 1:55 PM MDT | Wind Advisory | SLC | 52 hr |
| Mar 19, 2:58 PM MDT | Winter Weather Advisory | SLC | 27 hr |
| Mar 27, 3:17 PM MDT | Wind Advisory | SLC | 29 hr |
| Apr 3, 12:37 PM MDT | Wind Advisory | SLC | 53 hr |
| Apr 10, 4:22 AM MDT | Winter Storm Watch | SLC | 11 hr |
| Apr 10, 3:09 PM MDT | Wind Advisory | SLC | 39 hr |
| Apr 10, 3:15 PM MDT | Winter Storm Warning | SLC | 60 hr |
| Apr 10, 3:15 PM MDT | Winter Weather Advisory | SLC | 60 hr |
| Apr 20, 3:13 PM MDT | Wind Advisory | SLC | 31 hr |
| Apr 21, 3:25 AM MDT | Winter Weather Advisory | SLC | 57 hr |
| Apr 28, 9:11 PM MDT | Wind Advisory | SLC | 5 hr |
| May 2, 8:43 PM MDT | Special Weather Statement | SLC | 77 min |
| May 2, 9:11 PM MDT | Severe Thunderstorm Warning | SLC | 41 min |
| May 11, 9:26 PM MDT | Wind Advisory | SLC | 2 hr |
| May 18, 10:52 AM MDT | Wind Advisory | SLC | 40 hr |
| May 28, 8:57 PM MDT | Winter Weather Advisory | SLC | 42 hr |
| Jun 15, 2:27 PM MDT | High Wind Watch | SLC | 22 hr |
| Jun 16, 3:48 AM MDT | Red Flag Warning | SLC | 4 days |
| Jun 16, 12:41 PM MDT | High Wind Warning | SLC | 57 hr |
| Jun 16, 12:41 PM MDT | Wind Advisory | SLC | 57 hr |
| Jun 19, 3:12 PM MDT | Special Weather Statement | SLC | 63 min |
| Jun 23, 6:12 PM MDT | Special Weather Statement | SLC | 48 min |
| Jun 23, 6:57 PM MDT | Special Weather Statement | SLC | 48 min |
| Jun 28, 2:41 PM MDT | Special Weather Statement | SLC | 34 min |
| Jun 28, 3:17 PM MDT | Special Weather Statement | SLC | 28 min |
| Jun 28, 3:24 PM MDT | Severe Thunderstorm Warning | SLC | 22 min |
| Jun 28, 4:42 PM MDT | Special Weather Statement | SLC | 33 min |
| Jun 28, 5:27 PM MDT | Special Weather Statement | SLC | 33 min |
| Jun 28, 5:51 PM MDT | Special Weather Statement | SLC | 39 min |
| Jun 29, 5:36 PM MDT | Special Weather Statement | SLC | 24 min |
| Jun 30, 3:14 PM MDT | Special Weather Statement | SLC | 46 min |
| Jun 30, 3:43 PM MDT | Areal Flood Advisory | SLC | 62 min |
| Jun 30, 7:40 PM MDT | Special Weather Statement | SLC | 50 min |
| Jul 1, 1:59 AM MDT | Red Flag Warning | SLC | 4 days |
| Jul 7, 12:47 PM MDT | Red Flag Warning | SLC | 56 hr |
| Jul 8, 1:38 PM MDT | Heat Advisory | SLC | 31 hr |
| Jul 11, 2:47 PM MDT | Excessive Heat Warning | SLC | 3 days |
| Jul 13, 11:50 AM MDT | Red Flag Warning | SLC | 12 hr |
| Jul 13, 3:15 PM MDT | Special Weather Statement | SLC | 45 min |
| Jul 13, 3:31 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 7:00 PM MDT | Special Weather Statement | SLC | 30 min |
| Jul 13, 7:31 PM MDT | Areal Flood Advisory | SLC | 59 min |
| Jul 14, 6:31 PM MDT | Special Weather Statement | SLC | 29 min |
| Jul 14, 6:50 PM MDT | Severe Thunderstorm Warning | SLC | 25 min |
| Jul 15, 2:33 PM MDT | Excessive Heat Watch | SLC | 25 hr |
| Jul 16, 3:50 PM MDT | Excessive Heat Warning | SLC | 28 hr |
| Jul 17, 3:52 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 17, 5:26 PM MDT | Special Weather Statement | SLC | 34 min |
| Jul 17, 5:42 PM MDT | Severe Thunderstorm Warning | SLC | 33 min |
| Jul 17, 6:11 PM MDT | Severe Thunderstorm Warning | SLC | 34 min |
| Jul 17, 6:45 PM MDT | Severe Thunderstorm Warning | SLC | 45 min |
| Jul 18, 6:18 PM MDT | Special Weather Statement | SLC | 42 min |
| Jul 18, 6:52 PM MDT | Severe Thunderstorm Warning | SLC | 23 min |
| Jul 18, 7:04 PM MDT | Special Weather Statement | SLC | 11 min |
| Jul 18, 7:10 PM MDT | Special Weather Statement | SLC | 35 min |
| Jul 18, 7:42 PM MDT | Special Weather Statement | SLC | 48 min |
| Jul 22, 1:05 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 22, 2:58 PM MDT | Special Weather Statement | SLC | 32 min |
| Jul 22, 3:31 PM MDT | Special Weather Statement | SLC | 44 min |
| Jul 22, 4:45 PM MDT | Severe Thunderstorm Warning | SLC | 45 min |
| Jul 22, 5:26 PM MDT | Severe Thunderstorm Warning | SLC | 49 min |
| Jul 29, 4:37 PM MDT | Special Weather Statement | SLC | 38 min |
| Jul 29, 4:44 PM MDT | Areal Flood Advisory | SLC | 2 hr |
| Aug 1, 11:06 AM MDT | Flood Watch | SLC | 13 hr |
| Aug 1, 9:30 PM MDT | Special Weather Statement | SLC | 45 min |
| Aug 1, 10:17 PM MDT | Severe Thunderstorm Warning | SLC | 28 min |
| Aug 1, 10:35 PM MDT | Areal Flood Advisory | SLC | 115 min |
| Aug 5, 2:57 PM MDT | Special Weather Statement | SLC | 48 min |
| Aug 5, 3:55 PM MDT | Areal Flood Advisory | SLC | 2 hr |
| Aug 5, 3:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Aug 6, 3:21 PM MDT | Areal Flood Advisory | SLC | 114 min |
| Aug 11, 1:44 PM MDT | Flood Watch | SLC | 3 days |
| Aug 12, 4:38 PM MDT | Special Weather Statement | SLC | 37 min |
| Aug 12, 4:42 PM MDT | Areal Flood Advisory | SLC | 2 hr |
| Aug 12, 5:37 PM MDT | Areal Flood Warning | SLC | 83 min |
| Aug 12, 6:13 PM MDT | Flash Flood Warning | SLC | 2 hr |
| Aug 12, 6:22 PM MDT | Special Weather Statement | SLC | 38 min |
| Aug 24, 5:40 PM MDT | Special Weather Statement | SLC | 65 min |
| Sep 2, 9:03 AM MDT | Heat Advisory | SLC | 5 days |
| Sep 12, 2:28 PM MDT | Flood Watch | SLC | 55 hr |
| Sep 15, 10:45 PM MDT | Severe Thunderstorm Warning | SLC | 16 min |
| Sep 21, 11:26 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 12:19 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 21, 12:32 PM MDT | Special Weather Statement | SLC | 43 min |
| Sep 21, 1:06 PM MDT | Special Weather Statement | SLC | 39 min |
| Sep 21, 1:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Sep 21, 2:07 PM MDT | Special Weather Statement | SLC | 23 min |
| Sep 21, 2:32 PM MDT | Severe Thunderstorm Warning | SLC | 28 min |
| Sep 21, 2:58 PM MDT | Severe Thunderstorm Warning | SLC | 32 min |
| Sep 21, 10:16 PM MDT | Special Weather Statement | SLC | 44 min |
| Sep 28, 7:28 PM MDT | Special Weather Statement | SLC | 47 min |
| Sep 28, 8:01 PM MDT | Severe Thunderstorm Warning | SLC | 59 min |
| Sep 28, 8:14 PM MDT | Special Weather Statement | SLC | 46 min |
| Sep 29, 12:50 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 29, 4:29 PM MDT | Special Weather Statement | SLC | 31 min |
| Sep 29, 5:01 PM MDT | Special Weather Statement | SLC | 29 min |
| Oct 14, 9:25 PM MDT | Wind Advisory | SLC | 37 hr |
| Oct 20, 12:07 PM MDT | Winter Storm Watch | SLC | 15 hr |
| Oct 20, 12:28 PM MDT | Wind Advisory | SLC | 59 hr |
| Oct 21, 3:07 AM MDT | Winter Storm Warning | SLC | 69 hr |
| Oct 22, 2:18 PM MDT | Hard Freeze Warning | SLC | 43 hr |
| Oct 23, 5:11 AM MDT | Special Weather Statement | SLC | 64 min |
| Oct 23, 6:23 AM MDT | Winter Weather Advisory | SLC | 8 hr |
| Oct 26, 2:12 AM MDT | Winter Weather Advisory | SLC | 28 hr |
| Oct 26, 2:16 AM MDT | Hard Freeze Warning | SLC | 31 hr |
| Oct 27, 2:01 PM MDT | Hard Freeze Warning | SLC | 19 hr |
| Oct 31, 3:00 AM MDT | High Wind Watch | SLC | 10 hr |
| Oct 31, 1:00 PM MDT | High Wind Warning | SLC | 41 hr |
| Oct 31, 1:00 PM MDT | Wind Advisory | SLC | 41 hr |
| Oct 31, 2:12 PM MDT | Winter Weather Advisory | SLC | 3 days |
| Nov 4, 3:21 AM MDT | Winter Weather Advisory | SLC | 55 hr |
| Nov 4, 2:38 PM MDT | Winter Storm Warning | SLC | 43 hr |
| Nov 5, 2:25 PM MDT | High Wind Watch | SLC | 24 hr |
| Nov 6, 1:50 PM MST | High Wind Warning | SLC | 25 hr |
| Nov 6, 1:50 PM MST | Wind Advisory | SLC | 62 hr |
| Nov 6, 1:52 PM MST | Winter Storm Watch | SLC | 25 hr |
| Nov 7, 2:26 PM MST | Winter Storm Warning | SLC | 66 hr |
| Nov 9, 5:38 AM MST | Snow Squall Warning | SLC | 52 min |
| Nov 27, 3:18 AM MST | Winter Weather Advisory | SLC | 59 hr |
| Nov 28, 1:04 PM MST | Winter Storm Warning | SLC | 25 hr |
| Nov 30, 3:20 AM MST | Wind Advisory | SLC | 55 hr |
| Nov 30, 2:33 PM MST | Winter Storm Watch | SLC | 24 hr |
| Dec 1, 10:02 AM MST | High Wind Warning | SLC | 18 hr |
| Dec 1, 2:13 PM MST | Winter Storm Warning | SLC | 24 hr |
| Dec 4, 2:53 AM MST | Winter Weather Advisory | SLC | 48 hr |
| Dec 6, 9:35 PM MST | Winter Weather Advisory | SLC | 28 hr |
| Dec 8, 2:48 PM MST | Winter Weather Advisory | SLC | 25 hr |
| Dec 10, 2:19 PM MST | Wind Advisory | SLC | 29 hr |
| Dec 10, 2:49 PM MST | Winter Storm Watch | SLC | 13 hr |
| Dec 10, 2:49 PM MST | Winter Storm Warning | SLC | 3 days |
| Dec 10, 2:49 PM MST | Winter Weather Advisory | SLC | 4 days |
| Dec 14, 3:21 PM MST | Winter Weather Advisory | SLC | 20 hr |
| Dec 20, 3:25 AM MST | Winter Weather Advisory | SLC | 10 hr |
| Dec 20, 1:33 PM MST | Wind Chill Warning | SLC | 45 hr |
| Dec 20, 1:33 PM MST | Winter Storm Warning | SLC | 39 hr |
| Dec 20, 1:33 PM MST | Winter Weather Advisory | SLC | 35 hr |
| Dec 21, 3:31 AM MST | High Wind Warning | SLC | 31 hr |
| Dec 26, 2:35 PM MST | Winter Weather Advisory | SLC | 54 hr |
| Dec 28, 2:55 PM MST | Winter Storm Watch | SLC | 25 hr |
| Dec 29, 3:30 PM MST | Winter Storm Warning | SLC | 4 days |
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 | 14 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 37 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flood Watch | 3 |
| Areal Flood Advisory | 7 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 12 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 23 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Hard Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 3 |
| Wind Advisory | 16 |
| Fire | |
| Red Flag Warning | 4 |
| 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 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.