Alert archive / Utah / Salt Lake County
Weather alerts in Salt Lake County, Utah, 2023
176 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 176
- Warnings
- 52
- Watches
- 20
- Advisories
- 46
- Busiest month
- March30 alerts
- Busiest day
- June 3, 202310 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Salt Lake County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 21 | 14 | 33% | 31 | 61% | 20 min |
| Flash flood warnings | 1 | 0 | 100% | 1 | 0% |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Salt Lake City, UT: tornado warnings | 0 | 1 | 0% | |||
| NWS Salt Lake City, UT: severe thunderstorm warnings | 100 | 38 | 62% | 245 | 38% | 22 min |
| NWS Salt Lake City, UT: flash flood warnings | 75 | 31 | 59% | 55 | 64% | 72 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 5, 3:28 AM MST | Winter Storm Warning | SLC | 35 hr |
| Jan 5, 2:54 PM MST | Winter Weather Advisory | SLC | 19 hr |
| Jan 8, 1:34 PM MST | Winter Weather Advisory | SLC | 3 days |
| Jan 9, 2:33 PM MST | Winter Storm Warning | SLC | 49 hr |
| Jan 13, 1:30 PM MST | Winter Storm Warning | SLC | 58 hr |
| Jan 15, 2:54 PM MST | Winter Weather Advisory | SLC | 50 hr |
| Jan 17, 4:59 PM MST | Winter Weather Advisory | SLC | 11 hr |
| Jan 22, 1:17 PM MST | Wind Advisory | SLC | 14 hr |
| Jan 23, 3:04 AM MST | Wind Advisory | SLC | 7 hr |
| Jan 26, 1:26 AM MST | Dense Fog Advisory | SLC | 9 hr |
| Jan 26, 2:47 PM MST | Winter Weather Advisory | SLC | 45 hr |
| Jan 28, 2:45 AM MST | High Wind Watch | SLC | 24 hr |
| Jan 28, 2:53 AM MST | Wind Chill Watch | SLC | 35 hr |
| Jan 28, 2:11 PM MST | Winter Weather Advisory | SLC | 53 hr |
| Jan 29, 3:14 AM MST | Wind Chill Warning | SLC | 33 hr |
| Feb 4, 2:56 PM MST | Winter Weather Advisory | SLC | 50 hr |
| Feb 14, 2:45 AM MST | Wind Advisory | SLC | 36 hr |
| Feb 19, 3:18 AM MST | Winter Storm Watch | SLC | 24 hr |
| Feb 20, 3:02 AM MST | Winter Storm Warning | SLC | 4 days |
| Feb 20, 3:02 AM MST | Winter Weather Advisory | SLC | 65 hr |
| Feb 22, 2:25 PM MST | Winter Weather Advisory | SLC | 47 hr |
| Feb 25, 10:49 PM MST | Winter Storm Watch | SLC | 15 hr |
| Feb 26, 3:38 AM MST | Winter Storm Warning | SLC | 4 days |
| Feb 28, 12:42 AM MST | Snow Squall Warning | SLC | 63 min |
| Feb 28, 1:48 AM MST | Snow Squall Warning | SLC | 42 min |
| Feb 28, 2:38 AM MST | Snow Squall Warning | SLC | 22 min |
| Mar 3, 1:33 PM MST | Winter Weather Advisory | SLC | 45 hr |
| Mar 5, 2:12 PM MST | Winter Weather Advisory | SLC | 21 hr |
| Mar 8, 1:34 PM MST | Winter Weather Advisory | SLC | 15 hr |
| Mar 8, 4:58 PM MST | Special Weather Statement | SLC | 47 min |
| Mar 8, 5:44 PM MST | Special Weather Statement | SLC | 46 min |
| Mar 9, 4:31 AM MST | Wind Advisory | SLC | 42 hr |
| Mar 9, 5:47 AM MST | Winter Storm Watch | SLC | 8 hr |
| Mar 9, 2:08 PM MST | Winter Storm Warning | SLC | 49 hr |
| Mar 10, 5:52 PM MST | Special Weather Statement | SLC | 53 min |
| Mar 12, 3:01 PM MDT | Winter Storm Watch | SLC | 12 hr |
| Mar 13, 2:40 AM MDT | Winter Storm Warning | SLC | 70 hr |
| Mar 13, 2:26 PM MDT | Wind Advisory | SLC | 40 hr |
| Mar 18, 1:22 PM MDT | Winter Weather Advisory | SLC | 13 hr |
| Mar 19, 2:45 AM MDT | Winter Storm Warning | SLC | 48 hr |
| Mar 19, 1:13 PM MDT | Winter Storm Watch | SLC | 26 hr |
| Mar 20, 1:36 PM MDT | Special Weather Statement | SLC | 39 min |
| Mar 20, 2:47 PM MDT | Winter Storm Warning | SLC | 61 hr |
| Mar 20, 2:47 PM MDT | Winter Weather Advisory | SLC | 61 hr |
| Mar 23, 3:30 PM MDT | Winter Storm Warning | SLC | 45 hr |
| Mar 23, 3:30 PM MDT | Winter Weather Advisory | SLC | 45 hr |
| Mar 24, 7:43 AM MDT | Snow Squall Warning | SLC | 17 min |
| Mar 24, 8:00 AM MDT | Special Weather Statement | SLC | 45 min |
| Mar 24, 10:57 AM MDT | Snow Squall Warning | SLC | 63 min |
| Mar 26, 9:07 AM MDT | Special Weather Statement | SLC | 83 min |
| Mar 26, 1:52 PM MDT | Winter Weather Advisory | SLC | 22 hr |
| Mar 28, 3:00 AM MDT | Wind Advisory | SLC | 42 hr |
| Mar 28, 2:28 PM MDT | Winter Storm Watch | SLC | 24 hr |
| Mar 29, 2:46 PM MDT | Winter Weather Advisory | SLC | 54 hr |
| Mar 30, 4:03 AM MDT | Winter Storm Warning | SLC | 41 hr |
| Mar 31, 2:18 PM MDT | Winter Storm Watch | SLC | 38 hr |
| Apr 1, 3:54 PM MDT | Winter Storm Warning | SLC | 4 days |
| Apr 1, 3:54 PM MDT | Winter Weather Advisory | SLC | 50 hr |
| Apr 12, 11:32 AM MDT | River Flood Advisory | SLC | 7 hr |
| Apr 12, 6:34 PM MDT | River Flood Warning | SLC | 17 hr |
| Apr 16, 9:43 AM MDT | River Flood Advisory | SLC | 59 hr |
| Apr 17, 2:56 PM MDT | Wind Advisory | SLC | 29 hr |
| Apr 17, 2:57 PM MDT | Winter Weather Advisory | SLC | 28 hr |
| Apr 18, 11:12 AM MDT | Special Weather Statement | SLC | 33 min |
| Apr 18, 11:32 AM MDT | Special Weather Statement | SLC | 28 min |
| Apr 18, 11:41 AM MDT | Severe Thunderstorm Warning | SLC | 34 min |
| Apr 18, 11:55 AM MDT | Special Weather Statement | SLC | 50 min |
| Apr 18, 11:59 AM MDT | High Wind Warning | SLC | 8 hr |
| Apr 18, 1:45 PM MDT | Special Weather Statement | SLC | 30 min |
| Apr 21, 8:28 AM MDT | Winter Weather Advisory | SLC | 19 hr |
| Apr 24, 2:04 PM MDT | Special Weather Statement | SLC | 26 min |
| Apr 24, 3:43 PM MDT | Special Weather Statement | SLC | 32 min |
| Apr 24, 4:14 PM MDT | Special Weather Statement | SLC | 46 min |
| Apr 28, 2:34 PM MDT | River Flood Watch | SLC | 21 hr |
| Apr 29, 11:32 AM MDT | River Flood Watch | SLC | 72 hr |
| Apr 30, 7:52 PM MDT | River Flood Warning | SLC | 3 days |
| May 4, 1:55 PM MDT | Special Weather Statement | SLC | 50 min |
| May 6, 1:45 PM MDT | Special Weather Statement | SLC | 30 min |
| May 23, 5:38 PM MDT | Special Weather Statement | SLC | 37 min |
| May 24, 1:03 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 5:12 PM MDT | Special Weather Statement | SLC | 33 min |
| May 25, 5:34 PM MDT | Special Weather Statement | SLC | 26 min |
| Jun 3, 11:00 AM MDT | Special Weather Statement | SLC | 30 min |
| Jun 3, 11:31 AM MDT | Special Weather Statement | SLC | 14 min |
| Jun 3, 11:59 AM MDT | Special Weather Statement | SLC | 31 min |
| Jun 3, 12:07 PM MDT | Severe Thunderstorm Warning | SLC | 23 min |
| Jun 3, 12:29 PM MDT | Severe Thunderstorm Warning | SLC | 31 min |
| Jun 3, 12:59 PM MDT | Severe Thunderstorm Warning | SLC | 31 min |
| Jun 3, 1:04 PM MDT | Severe Thunderstorm Warning | SLC | 26 min |
| Jun 3, 1:32 PM MDT | Special Weather Statement | SLC | 28 min |
| Jun 3, 2:09 PM MDT | Severe Thunderstorm Warning | SLC | 51 min |
| Jun 3, 3:29 PM MDT | Special Weather Statement | SLC | 31 min |
| Jun 6, 1:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 2:13 PM MDT | Special Weather Statement | SLC | 32 min |
| Jun 11, 2:58 PM MDT | Special Weather Statement | SLC | 32 min |
| Jun 11, 5:12 PM MDT | Special Weather Statement | SLC | 33 min |
| Jun 12, 2:59 PM MDT | Special Weather Statement | SLC | 31 min |
| Jun 18, 3:14 PM MDT | Wind Advisory | SLC | 32 hr |
| Jul 3, 1:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 3, 5:13 PM MDT | Special Weather Statement | SLC | 47 min |
| Jul 3, 5:23 PM MDT | Severe Thunderstorm Warning | SLC | 37 min |
| Jul 3, 5:30 PM MDT | Severe Thunderstorm Warning | SLC | 30 min |
| Jul 3, 5:52 PM MDT | Severe Thunderstorm Warning | SLC | 38 min |
| Jul 8, 2:09 AM MDT | Wind Advisory | SLC | 4 hr |
| Jul 12, 2:02 PM MDT | Excessive Heat Watch | SLC | 25 hr |
| Jul 12, 2:02 PM MDT | Excessive Heat Warning | SLC | 5 days |
| Jul 18, 3:12 PM MDT | Excessive Heat Watch | SLC | 47 hr |
| Jul 19, 2:21 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 5:16 PM MDT | Special Weather Statement | SLC | 29 min |
| Jul 19, 5:26 PM MDT | Severe Thunderstorm Warning | SLC | 34 min |
| Jul 19, 6:56 PM MDT | Severe Thunderstorm Warning | SLC | 49 min |
| Jul 19, 7:09 PM MDT | Severe Thunderstorm Warning | SLC | 36 min |
| Jul 20, 3:09 AM MDT | Excessive Heat Warning | SLC | 5 days |
| Jul 24, 3:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 24, 7:46 PM MDT | Special Weather Statement | SLC | 44 min |
| Jul 24, 7:54 PM MDT | Severe Thunderstorm Warning | SLC | 36 min |
| Jul 24, 10:38 PM MDT | Special Weather Statement | SLC | 52 min |
| Jul 25, 10:41 PM MDT | Special Weather Statement | SLC | 49 min |
| Jul 26, 1:58 PM MDT | Special Weather Statement | SLC | 32 min |
| Jul 26, 2:05 PM MDT | Special Weather Statement | SLC | 40 min |
| Jul 26, 5:19 PM MDT | Special Weather Statement | SLC | 41 min |
| Jul 26, 5:25 PM MDT | Severe Thunderstorm Warning | SLC | 35 min |
| Jul 26, 8:25 PM MDT | Special Weather Statement | SLC | 35 min |
| Jul 29, 8:59 AM MDT | Heat Advisory | SLC | 36 hr |
| Aug 1, 4:09 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Aug 2, 7:40 AM MDT | Flood Watch | SLC | 31 hr |
| Aug 2, 12:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 1:34 PM MDT | Areal Flood Advisory | SLC | 107 min |
| Aug 2, 2:27 PM MDT | Severe Thunderstorm Warning | SLC | 33 min |
| Aug 2, 3:01 PM MDT | Severe Thunderstorm Warning | SLC | 59 min |
| Aug 2, 3:45 PM MDT | Severe Thunderstorm Warning | SLC | 60 min |
| Aug 2, 4:03 PM MDT | Areal Flood Advisory | SLC | 117 min |
| Aug 2, 4:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 3, 8:17 PM MDT | Special Weather Statement | SLC | 28 min |
| Aug 3, 8:30 PM MDT | Severe Thunderstorm Warning | SLC | 30 min |
| Aug 3, 8:46 PM MDT | Special Weather Statement | SLC | 44 min |
| Aug 3, 8:58 PM MDT | Severe Thunderstorm Warning | SLC | 47 min |
| Aug 3, 9:14 PM MDT | Areal Flood Advisory | SLC | 3 hr |
| Aug 17, 3:11 PM MDT | Special Weather Statement | SLC | 34 min |
| Aug 17, 3:19 PM MDT | Severe Thunderstorm Warning | SLC | 41 min |
| Aug 17, 4:33 PM MDT | Special Weather Statement | SLC | 42 min |
| Aug 17, 5:07 PM MDT | Special Weather Statement | SLC | 38 min |
| Aug 17, 5:15 PM MDT | Severe Thunderstorm Warning | SLC | 16 min |
| Aug 19, 2:37 AM MDT | High Wind Watch | SLC | 23 hr |
| Aug 19, 6:11 PM MDT | Special Weather Statement | SLC | 34 min |
| Aug 19, 6:43 PM MDT | Special Weather Statement | SLC | 32 min |
| Aug 20, 1:46 AM MDT | High Wind Warning | SLC | 37 hr |
| Aug 20, 1:46 AM MDT | Wind Advisory | SLC | 43 hr |
| Aug 23, 6:14 PM MDT | Special Weather Statement | SLC | 46 min |
| Aug 23, 7:00 PM MDT | Special Weather Statement | SLC | 30 min |
| Aug 23, 7:31 PM MDT | Special Weather Statement | SLC | 14 min |
| Aug 23, 7:46 PM MDT | Special Weather Statement | SLC | 29 min |
| Aug 23, 7:49 PM MDT | Areal Flood Advisory | SLC | 42 min |
| Aug 31, 2:25 PM MDT | Wind Advisory | SLC | 30 hr |
| Sep 2, 12:02 PM MDT | Flood Watch | SLC | 39 hr |
| Sep 3, 12:32 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 1:34 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 4, 8:20 AM MDT | Areal Flood Advisory | SLC | 115 min |
| Sep 19, 7:51 PM MDT | Special Weather Statement | SLC | 24 min |
| Sep 30, 5:01 PM MDT | Special Weather Statement | SLC | 44 min |
| Oct 10, 2:39 AM MDT | Winter Weather Advisory | SLC | 57 hr |
| Oct 25, 2:15 AM MDT | Freeze Watch | SLC | 25 hr |
| Oct 25, 2:20 AM MDT | Winter Weather Advisory | SLC | 38 hr |
| Oct 26, 3:03 AM MDT | Freeze Warning | SLC | 30 hr |
| Nov 17, 1:35 PM MST | Winter Storm Watch | SLC | 25 hr |
| Nov 18, 2:39 AM MST | High Wind Watch | SLC | 12 hr |
| Nov 18, 2:18 PM MST | Winter Storm Warning | SLC | 37 hr |
| Nov 18, 2:26 PM MST | High Wind Warning | SLC | 39 hr |
| Nov 22, 2:01 AM MST | Winter Weather Advisory | SLC | 3 days |
| Nov 22, 3:03 PM MST | Winter Storm Warning | SLC | 47 hr |
| Nov 30, 2:30 PM MST | Winter Storm Warning | SLC | 4 days |
| Nov 30, 2:30 PM MST | Winter Weather Advisory | SLC | 69 hr |
| Dec 7, 2:11 PM MST | Winter Storm Warning | SLC | 30 hr |
| Dec 8, 6:59 PM MST | Special Weather Statement | SLC | 31 min |
| Dec 17, 6:40 AM MST | Dense Fog Advisory | SLC | 5 hr |
| Dec 17, 8:54 PM MST | Dense Fog Advisory | SLC | 12 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 archive20222024
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.