Alert archive / Utah / Salt Lake County
Weather alerts in Salt Lake County, Utah, 2014
42 weather alerts in 2014, 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 2014. Tap one for its archive.
- Alerts
- 42
- Warnings
- 11
- Watches
- 2
- Advisories
- 11
- Busiest month
- August18 alerts
- Busiest day
- August 5, 20144 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, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 3 | 57% | 10 | 10% | 22 min |
| Flash flood warnings | 0 | 1 | 0% |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Salt Lake City, UT: severe thunderstorm warnings | 43 | 13 | 70% | 89 | 24% | 24 min |
| NWS Salt Lake City, UT: flash flood warnings | 53 | 21 | 60% | 59 | 42% | 70 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 |
|---|---|---|---|
| Apr 22, 1:58 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 4:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| May 6, 1:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 10, 5:14 PM MDT | Severe Thunderstorm Warning | SLC | 46 min |
| Jun 10, 5:22 PM MDT | Special Weather Statement | SLC | 23 min |
| Jun 10, 5:54 PM MDT | Special Weather Statement | SLC | 36 min |
| Jun 11, 1:46 PM MDT | Red Flag Warning | SLC | 56 hr |
| Jun 12, 2:39 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jun 12, 4:38 PM MDT | Severe Thunderstorm Warning | SLC | 43 min |
| Jun 12, 5:10 PM MDT | Severe Thunderstorm Warning | SLC | 35 min |
| Jun 13, 2:19 PM MDT | Fire Weather Watch | SLC | 24 hr |
| Jun 14, 3:10 AM MDT | Red Flag Warning | SLC | 4 days |
| Jul 2, 2:55 PM MDT | Red Flag Warning | SLC | 31 hr |
| Jul 3, 5:06 PM MDT | Severe Thunderstorm Warning | SLC | 24 min |
| Jul 14, 6:29 PM MDT | Special Weather Statement | SLC | 61 min |
| Jul 19, 3:01 AM MDT | Fire Weather Watch | SLC | 60 hr |
| Jul 21, 3:05 PM MDT | Red Flag Warning | SLC | 55 hr |
| Jul 28, 3:42 PM MDT | Areal Flood Advisory | SLC | 3 hr |
| Jul 29, 12:21 PM MDT | Areal Flood Advisory | SLC | 114 min |
| Jul 29, 1:12 PM MDT | Areal Flood Advisory | SLC | 2 hr |
| Aug 3, 5:08 PM MDT | Special Weather Statement | SLC | 37 min |
| Aug 4, 6:39 PM MDT | Areal Flood Advisory | SLC | 96 min |
| Aug 4, 7:54 PM MDT | Areal Flood Advisory | SLC | 96 min |
| Aug 5, 2:07 PM MDT | Special Weather Statement | SLC | 38 min |
| Aug 5, 3:10 PM MDT | Special Weather Statement | SLC | 50 min |
| Aug 6, 1:52 PM MDT | Special Weather Statement | SLC | 23 min |
| Aug 6, 1:58 PM MDT | Areal Flood Advisory | SLC | 3 hr |
| Aug 6, 2:39 PM MDT | Special Weather Statement | SLC | 36 min |
| Aug 6, 9:30 PM MDT | Severe Thunderstorm Warning | SLC | 30 min |
| Aug 6, 10:00 PM MDT | Special Weather Statement | SLC | 45 min |
| Aug 12, 5:51 PM MDT | Special Weather Statement | SLC | 54 min |
| Aug 12, 6:15 PM MDT | Severe Thunderstorm Warning | SLC | 45 min |
| Aug 12, 7:20 PM MDT | Areal Flood Advisory | SLC | 85 min |
| Aug 20, 3:19 PM MDT | Special Weather Statement | SLC | 41 min |
| Aug 20, 3:45 PM MDT | Severe Thunderstorm Warning | SLC | 45 min |
| Aug 20, 5:07 PM MDT | Areal Flood Advisory | SLC | 113 min |
| Aug 20, 7:47 PM MDT | Special Weather Statement | SLC | 43 min |
| Aug 24, 8:11 PM MDT | Special Weather Statement | SLC | 34 min |
| Sep 8, 5:13 PM MDT | Areal Flood Advisory | SLC | 3 hr |
| Sep 26, 7:05 PM MDT | Special Weather Statement | SLC | 40 min |
| Sep 27, 4:52 PM MDT | Areal Flood Advisory | SLC | 3 hr |
| Sep 29, 4:08 PM MDT | Areal Flood Advisory | SLC | 82 min |
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 | 4 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Advisory | 11 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20132015
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.