Alert archive / Utah / Duchesne County
Weather alerts in Duchesne County, Utah, 2023
84 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Duchesne County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 84
- Warnings
- 22
- Watches
- 14
- Advisories
- 31
- Busiest month
- March20 alerts
- Busiest day
- July 4, 20234 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Duchesne County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 2 | 33% | 3 | 33% | 15 min |
| Flash flood warnings | 6 | 1 | 83% | 3 | 33% | 66 min |
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 4, 2:41 AM MST | Dense Fog Advisory | SLC | 8 hr |
| Jan 5, 3:28 AM MST | Winter Storm Warning | SLC | 35 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 13, 1:30 PM MST | Winter Weather Advisory | 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 28, 2:11 PM MST | Winter Weather Advisory | SLC | 53 hr |
| Feb 4, 2:56 PM MST | Winter Weather Advisory | SLC | 50 hr |
| Feb 8, 3:29 AM MST | Wind Advisory | SLC | 24 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 22, 2:25 PM MST | Winter Weather Advisory | SLC | 47 hr |
| Feb 24, 2:03 PM MST | Winter Weather Advisory | SLC | 6 days |
| Feb 25, 10:49 PM MST | Winter Storm Watch | SLC | 15 hr |
| Feb 26, 3:38 AM MST | Winter Storm Warning | SLC | 4 days |
| 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 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, 2:11 AM MST | Winter Weather Advisory | SLC | 25 hr |
| 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, 2:25 PM MDT | Winter Weather Advisory | SLC | 55 hr |
| Mar 14, 1:55 AM MDT | Dense Fog Advisory | SLC | 7 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, 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 Weather Advisory | SLC | 45 hr |
| Mar 24, 1:05 PM MDT | Special Weather Statement | SLC | 40 min |
| 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 31, 2:18 PM MDT | Winter Storm Watch | SLC | 38 hr |
| Apr 1, 3:54 PM MDT | Winter Storm Warning | SLC | 4 days |
| Apr 17, 2:56 PM MDT | Wind Advisory | SLC | 29 hr |
| Apr 21, 8:28 AM MDT | Winter Weather Advisory | SLC | 19 hr |
| Apr 27, 2:43 AM MDT | Wind Advisory | SLC | 19 hr |
| Apr 29, 12:23 PM MDT | Flood Watch | SLC | 27 days |
| May 22, 2:17 PM MDT | Flash Flood Warning | SLC | 3 hr |
| May 24, 2:05 PM MDT | Severe Thunderstorm Warning | SLC | 40 min |
| May 24, 2:57 PM MDT | Special Weather Statement | SLC | 33 min |
| May 25, 9:31 AM MDT | River Flood Watch | SLC | 5 days |
| May 25, 2:37 PM MDT | Special Weather Statement | SLC | 23 min |
| May 25, 2:42 PM MDT | Special Weather Statement | SLC | 33 min |
| May 26, 1:10 PM MDT | Special Weather Statement | SLC | 50 min |
| May 26, 2:08 PM MDT | Special Weather Statement | SLC | 37 min |
| Jun 11, 1:44 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Jul 3, 1:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 3, 6:24 PM MDT | Severe Thunderstorm Warning | SLC | 36 min |
| Jul 3, 6:59 PM MDT | Severe Thunderstorm Warning | SLC | 46 min |
| Jul 4, 12:59 PM MDT | Special Weather Statement | SLC | 31 min |
| Jul 4, 1:39 PM MDT | Special Weather Statement | SLC | 36 min |
| Jul 13, 3:05 PM MDT | Heat Advisory | SLC | 4 days |
| Jul 26, 4:50 PM MDT | Special Weather Statement | SLC | 40 min |
| Aug 1, 4:16 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Aug 2, 7:40 AM MDT | Flood Watch | SLC | 31 hr |
| Aug 2, 1:13 PM MDT | Special Weather Statement | SLC | 17 min |
| Aug 2, 4:30 PM MDT | Special Weather Statement | SLC | 45 min |
| Aug 17, 2:06 PM MDT | Flash Flood Warning | SLC | 4 hr |
| Aug 18, 1:23 PM MDT | Flood Watch | SLC | 35 hr |
| Aug 18, 4:56 PM MDT | Special Weather Statement | SLC | 34 min |
| Aug 21, 12:26 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 5:14 AM MDT | Special Weather Statement | SLC | 46 min |
| Aug 22, 12:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 3:39 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Sep 2, 12:02 PM MDT | Flood Watch | SLC | 39 hr |
| Sep 3, 6:47 PM MDT | Areal Flood Advisory | SLC | 118 min |
| Sep 18, 2:50 PM MDT | Flash Flood Warning | SLC | 3 hr |
| Sep 20, 8:02 PM MDT | Special Weather Statement | SLC | 28 min |
| Oct 1, 8:59 AM MDT | Winter Weather Advisory | SLC | 37 hr |
| Oct 10, 2:32 AM MDT | Freeze Watch | SLC | 24 hr |
| Oct 10, 2:39 AM MDT | Winter Weather Advisory | SLC | 57 hr |
| Oct 11, 2:49 AM MDT | Freeze Warning | SLC | 54 hr |
| Oct 25, 2:20 AM MDT | Winter Weather Advisory | SLC | 38 hr |
| Nov 17, 1:35 PM MST | Winter Storm Watch | SLC | 25 hr |
| Nov 18, 2:18 PM MST | Winter Storm Warning | SLC | 37 hr |
| Nov 22, 2:01 AM MST | Winter Weather Advisory | SLC | 3 days |
| 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 Weather Advisory | SLC | 30 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 | 3 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 14 |
| Flooding | |
| Flash Flood Warning | 6 |
| Flood Watch | 4 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 12 |
| Winter Storm Watch | 8 |
| Winter Weather Advisory | 24 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| 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 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.