Alert archive / Idaho / Jefferson County
Weather alerts in Jefferson County, Idaho, 2019
139 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 139
- Warnings
- 37
- Watches
- 13
- Advisories
- 39
- Busiest month
- June24 alerts
- Busiest day
- June 6, 20196 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 2 tornado warnings covering Jefferson County in 2019 had a tornado report inside them.
Jefferson County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 5 | 1 | 80% | 2 | 0% | |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pocatello, ID: tornado warnings | 4 | 1 | 75% | 3 | 33% | 0 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 35 | 8 | 77% | 88 | 40% | 16 min |
| NWS Pocatello, ID: flash flood warnings | 2 | 1 | 50% | 4 | 25% | 23 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, 2:59 PM MST | Winter Weather Advisory | PIH | 50 hr |
| Jan 11, 2:13 AM MST | Freezing Fog Advisory | PIH | 9 hr |
| Jan 16, 1:32 PM MST | Winter Weather Advisory | PIH | 44 hr |
| Jan 19, 2:11 PM MST | Winter Weather Advisory | PIH | 45 hr |
| Jan 26, 8:55 PM MST | Freezing Fog Advisory | PIH | 14 hr |
| Feb 2, 2:55 AM MST | Winter Weather Advisory | PIH | 4 days |
| Feb 3, 8:25 AM MST | Wind Advisory | PIH | 10 hr |
| Feb 6, 1:30 PM MST | Wind Chill Warning | PIH | 20 hr |
| Feb 9, 3:38 AM MST | Winter Weather Advisory | PIH | 45 hr |
| Feb 12, 1:28 PM MST | Winter Weather Advisory | PIH | 47 hr |
| Feb 14, 6:12 PM MST | Winter Weather Advisory | PIH | 10 hr |
| Feb 15, 1:41 PM MST | Special Weather Statement | PIH | 94 min |
| Feb 19, 2:46 AM MST | Winter Weather Advisory | PIH | 42 hr |
| Feb 21, 3:04 AM MST | Wind Chill Watch | PIH | 10 hr |
| Feb 21, 12:47 PM MST | Wind Chill Warning | PIH | 21 hr |
| Feb 23, 4:58 AM MST | Winter Weather Advisory | PIH | 5 days |
| Feb 27, 3:50 PM MST | Areal Flood Advisory | PIH | 5 days |
| Mar 7, 2:52 AM MST | Winter Weather Advisory | PIH | 51 hr |
| Mar 21, 1:41 PM MDT | Flood Watch | PIH | 3 days |
| Apr 8, 9:03 PM MDT | Special Weather Statement | PIH | 57 min |
| Apr 13, 2:14 PM MDT | Wind Advisory | PIH | 31 hr |
| Apr 24, 10:59 AM MDT | River Flood Advisory | PIH | 5 days |
| Apr 24, 1:13 PM MDT | High Wind Watch | PIH | 38 hr |
| Apr 26, 2:45 AM MDT | High Wind Warning | PIH | 18 hr |
| Apr 27, 3:02 AM MDT | Wind Advisory | PIH | 19 hr |
| Apr 27, 4:07 PM MDT | High Wind Warning | PIH | 6 hr |
| Apr 29, 2:06 PM MDT | River Flood Advisory | PIH | 15 hr |
| Apr 30, 1:59 PM MDT | Freeze Warning | PIH | 19 hr |
| May 2, 3:21 PM MDT | Wind Advisory | PIH | 6 hr |
| May 7, 12:46 PM MDT | Special Weather Statement | PIH | 29 min |
| May 9, 1:47 PM MDT | Freeze Warning | PIH | 19 hr |
| May 13, 8:10 PM MDT | Special Weather Statement | PIH | 50 min |
| May 13, 8:12 PM MDT | Special Weather Statement | PIH | 48 min |
| May 14, 3:13 PM MDT | Special Weather Statement | PIH | 62 min |
| May 14, 4:16 PM MDT | Special Weather Statement | PIH | 44 min |
| May 14, 5:49 PM MDT | Special Weather Statement | PIH | 41 min |
| May 17, 11:10 AM MDT | River Flood Advisory | PIH | 21 days |
| May 18, 9:59 AM MDT | River Flood Warning | PIH | 48 hr |
| May 20, 9:51 AM MDT | River Flood Advisory | PIH | 23 hr |
| May 21, 6:50 PM MDT | Areal Flood Advisory | PIH | 115 min |
| May 25, 2:38 PM MDT | Special Weather Statement | PIH | 67 min |
| May 25, 3:46 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 3:49 PM MDT | Special Weather Statement | PIH | 41 min |
| May 26, 2:30 PM MDT | Severe Thunderstorm Warning | PIH | 30 min |
| May 26, 2:45 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 26, 2:53 PM MDT | Special Weather Statement | PIH | 52 min |
| May 26, 3:15 PM MDT | Special Weather Statement | PIH | 45 min |
| May 26, 7:28 PM MDT | Special Weather Statement | PIH | 47 min |
| May 31, 3:20 PM MDT | Special Weather Statement | PIH | 55 min |
| May 31, 4:14 PM MDT | Special Weather Statement | PIH | 91 min |
| Jun 2, 5:26 PM MDT | Special Weather Statement | PIH | 49 min |
| Jun 2, 6:18 PM MDT | Special Weather Statement | PIH | 57 min |
| Jun 3, 1:58 PM MDT | Special Weather Statement | PIH | 92 min |
| Jun 6, 12:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 1:54 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 6, 2:18 PM MDT | Wind Advisory | PIH | 28 hr |
| Jun 6, 3:41 PM MDT | Special Weather Statement | PIH | 64 min |
| Jun 6, 4:59 PM MDT | Severe Thunderstorm Warning | PIH | 22 min |
| Jun 6, 5:46 PM MDT | Severe Thunderstorm Warning | PIH | 44 min |
| Jun 6, 7:12 PM MDT | Special Weather Statement | PIH | 33 min |
| Jun 6, 7:53 PM MDT | Severe Thunderstorm Warning | PIH | 37 min |
| Jun 6, 8:26 PM MDT | Severe Thunderstorm Warning | PIH | 49 min |
| Jun 8, 2:37 AM MDT | Freeze Warning | PIH | 29 hr |
| Jun 8, 11:19 AM MDT | River Flood Watch | PIH | 10 hr |
| Jun 8, 9:29 PM MDT | River Flood Warning | PIH | 68 hr |
| Jun 10, 8:12 PM MDT | River Flood Advisory | PIH | 14 hr |
| Jun 13, 2:41 PM MDT | Special Weather Statement | PIH | 34 min |
| Jun 16, 4:37 PM MDT | Special Weather Statement | PIH | 38 min |
| Jun 18, 1:40 PM MDT | Wind Advisory | PIH | 31 hr |
| Jun 18, 1:40 PM MDT | Wind Advisory | PIH | 53 hr |
| Jun 18, 5:23 PM MDT | Tornado Warning | PIH | 37 min |
| Jun 18, 5:54 PM MDT | Tornado Warning | PIH | 15 min |
| Jun 20, 4:35 AM MDT | High Wind Warning | PIH | 14 hr |
| Jun 26, 4:07 PM MDT | Special Weather Statement | PIH | 53 min |
| Jul 6, 6:05 PM MDT | Special Weather Statement | PIH | 55 min |
| Jul 7, 12:02 PM MDT | Red Flag Warning | PIH | 10 hr |
| Jul 8, 3:04 AM MDT | Red Flag Warning | PIH | 18 hr |
| Jul 12, 1:30 PM MDT | Fire Weather Watch | PIH | 13 hr |
| Jul 12, 7:39 PM MDT | Special Weather Statement | PIH | 51 min |
| Jul 12, 8:23 PM MDT | Special Weather Statement | PIH | 67 min |
| Jul 13, 2:27 AM MDT | Red Flag Warning | PIH | 20 hr |
| Jul 13, 3:30 PM MDT | Special Weather Statement | PIH | 45 min |
| Jul 13, 4:22 PM MDT | Special Weather Statement | PIH | 53 min |
| Jul 13, 7:01 PM MDT | Special Weather Statement | PIH | 44 min |
| Jul 13, 7:47 PM MDT | Special Weather Statement | PIH | 58 min |
| Jul 14, 12:17 PM MDT | Red Flag Warning | PIH | 33 hr |
| Jul 17, 12:28 PM MDT | Wind Advisory | PIH | 33 hr |
| Jul 18, 12:33 PM MDT | Red Flag Warning | PIH | 32 hr |
| Jul 21, 1:56 PM MDT | Heat Advisory | PIH | 30 hr |
| Jul 23, 3:00 AM MDT | Red Flag Warning | PIH | 18 hr |
| Jul 23, 1:23 PM MDT | Red Flag Warning | PIH | 32 hr |
| Jul 27, 5:45 PM MDT | Special Weather Statement | PIH | 60 min |
| Jul 27, 6:46 PM MDT | Special Weather Statement | PIH | 59 min |
| Jul 29, 3:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 1, 5:06 PM MDT | Special Weather Statement | PIH | 39 min |
| Aug 1, 5:48 PM MDT | Special Weather Statement | PIH | 42 min |
| Aug 4, 5:26 PM MDT | Special Weather Statement | PIH | 49 min |
| Aug 7, 2:25 PM MDT | Fire Weather Watch | PIH | 8 hr |
| Aug 7, 10:02 PM MDT | Red Flag Warning | PIH | 23 hr |
| Aug 9, 10:05 PM MDT | Special Weather Statement | PIH | 85 min |
| Aug 10, 4:40 PM MDT | Special Weather Statement | PIH | 95 min |
| Aug 16, 3:11 AM MDT | Fire Weather Watch | PIH | 11 hr |
| Aug 16, 2:06 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 17, 1:14 PM MDT | Red Flag Warning | PIH | 32 hr |
| Aug 22, 1:50 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 22, 4:56 PM MDT | Special Weather Statement | PIH | 49 min |
| Aug 23, 1:35 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 23, 1:35 PM MDT | Red Flag Warning | PIH | 55 hr |
| Aug 24, 2:33 AM MDT | Wind Advisory | PIH | 42 hr |
| Aug 30, 1:16 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 30, 1:16 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Aug 31, 1:34 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 31, 1:34 PM MDT | Red Flag Warning | PIH | 54 hr |
| Sep 6, 2:23 AM MDT | Red Flag Warning | PIH | 16 hr |
| Sep 10, 12:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 2:14 PM MDT | Special Weather Statement | PIH | 46 min |
| Sep 11, 3:20 PM MDT | Special Weather Statement | PIH | 85 min |
| Sep 16, 5:27 PM MDT | Special Weather Statement | PIH | 63 min |
| Sep 28, 4:02 AM MDT | Freeze Watch | PIH | 9 hr |
| Sep 28, 1:26 PM MDT | Freeze Warning | PIH | 45 hr |
| Sep 29, 3:57 AM MDT | Freeze Warning | PIH | 54 hr |
| Oct 1, 1:26 PM MDT | Freeze Warning | PIH | 20 hr |
| Oct 2, 1:36 PM MDT | Freeze Warning | PIH | 19 hr |
| Oct 3, 1:06 PM MDT | Wind Advisory | PIH | 32 hr |
| Oct 7, 1:58 PM MDT | Wind Advisory | PIH | 53 hr |
| Oct 18, 3:52 AM MDT | Wind Advisory | PIH | 14 hr |
| Oct 18, 1:40 PM MDT | Wind Advisory | PIH | 32 hr |
| Oct 27, 12:06 PM MDT | Special Weather Statement | PIH | 4 hr |
| Oct 28, 1:56 PM MDT | Winter Weather Advisory | PIH | 23 hr |
| Nov 20, 12:56 PM MST | Wind Advisory | PIH | 6 hr |
| Nov 26, 3:18 AM MST | Winter Storm Warning | PIH | 57 hr |
| Nov 26, 3:18 AM MST | Winter Weather Advisory | PIH | 50 hr |
| Nov 28, 4:37 AM MST | Winter Storm Watch | PIH | 8 hr |
| Nov 28, 12:55 PM MST | Winter Weather Advisory | PIH | 46 hr |
| Nov 30, 4:58 AM MST | Special Weather Statement | PIH | 2 hr |
| Dec 1, 8:57 AM MST | Winter Weather Advisory | PIH | 50 hr |
| Dec 2, 7:29 PM MST | Special Weather Statement | PIH | 4 hr |
| Dec 9, 1:57 AM MST | Special Weather Statement | PIH | 108 min |
| Dec 23, 3:31 AM MST | Winter Weather Advisory | PIH | 37 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 archive20182020
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.