Alert archive / Utah / Duchesne County
Weather alerts in Duchesne County, Utah, 2015
3 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 3
- Warnings
- 0
- Watches
- 0
- Advisories
- 0
- Busiest month
- June2 alerts
- Busiest day
- June 15, 20151 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, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 1 | 0% | |||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: tornado warnings | 3 | 1 | 67% | 3 | 33% | 25 min |
| NWS Grand Junction, CO: severe thunderstorm warnings | 45 | 7 | 84% | 22 | 27% | 20 min |
| NWS Grand Junction, CO: flash flood warnings | 17 | 3 | 82% | 19 | 16% | 51 min |
| NWS Salt Lake City, UT: severe thunderstorm warnings | 83 | 14 | 83% | 114 | 46% | 37 min |
| NWS Salt Lake City, UT: flash flood warnings | 70 | 21 | 70% | 35 | 66% | 110 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 |
|---|---|---|---|
| Jun 15, 3:51 PM MDT | Special Weather Statement | SLC | 39 min |
| Jun 15, 6:35 PM MDT | Special Weather Statement | SLC | 40 min |
| Aug 31, 2:02 PM MDT | Special Weather Statement | SLC | 43 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 | |
| Special Weather Statement | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.