Alert archive / Idaho / Jefferson County
Weather alerts in Jefferson County, Idaho, 2023
119 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 119
- Warnings
- 29
- Watches
- 8
- Advisories
- 55
- Busiest month
- July14 alerts
- Busiest day
- June 23, 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.
Jefferson County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 1 | 86% | 19 | 0% | |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pocatello, ID: tornado warnings | 2 | 0 | 100% | 2 | 0% | |
| NWS Pocatello, ID: severe thunderstorm warnings | 55 | 17 | 69% | 155 | 27% | 20 min |
| NWS Pocatello, ID: flash flood warnings | 42 | 8 | 81% | 30 | 77% | 60 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 9, 2:05 AM MST | Winter Weather Advisory | PIH | 59 hr |
| Jan 10, 5:26 PM MST | Special Weather Statement | PIH | 109 min |
| Jan 10, 7:12 PM MST | Special Weather Statement | PIH | 108 min |
| Jan 14, 5:55 AM MST | Dense Fog Advisory | PIH | 3 hr |
| Jan 18, 2:22 AM MST | Freezing Fog Advisory | PIH | 8 hr |
| Jan 20, 11:17 PM MST | Freezing Fog Advisory | PIH | 10 hr |
| Jan 25, 1:45 PM MST | Winter Storm Watch | PIH | 24 hr |
| Jan 26, 1:58 PM MST | Winter Weather Advisory | PIH | 68 hr |
| Jan 28, 2:41 PM MST | Wind Chill Warning | PIH | 67 hr |
| Jan 31, 8:39 PM MST | Wind Chill Warning | PIH | 13 hr |
| Feb 7, 4:25 AM MST | Freezing Fog Advisory | PIH | 8 hr |
| Feb 13, 3:11 AM MST | Winter Weather Advisory | PIH | 44 hr |
| Feb 14, 2:29 PM MST | Wind Chill Warning | PIH | 18 hr |
| Feb 15, 1:48 PM MST | Wind Chill Warning | PIH | 20 hr |
| Feb 16, 1:58 PM MST | Wind Chill Warning | PIH | 20 hr |
| Feb 17, 12:49 PM MST | Winter Weather Advisory | PIH | 39 hr |
| Feb 19, 2:47 PM MST | Winter Storm Watch | PIH | 13 hr |
| Feb 20, 3:54 AM MST | Winter Weather Advisory | PIH | 40 hr |
| Feb 22, 11:59 AM MST | Wind Chill Warning | PIH | 23 hr |
| Feb 26, 1:42 AM MST | Winter Weather Advisory | PIH | 3 days |
| Mar 3, 3:44 PM MST | Winter Storm Warning | PIH | 45 hr |
| Mar 3, 3:44 PM MST | Winter Weather Advisory | PIH | 45 hr |
| Mar 5, 12:56 AM MST | Special Weather Statement | PIH | 109 min |
| Mar 5, 2:33 AM MST | Special Weather Statement | PIH | 87 min |
| Mar 8, 2:44 PM MST | Winter Storm Watch | PIH | 13 hr |
| Mar 9, 4:05 AM MST | Winter Storm Warning | PIH | 46 hr |
| Mar 9, 4:05 AM MST | Winter Weather Advisory | PIH | 41 hr |
| Mar 10, 1:01 PM MST | Snow Squall Warning | PIH | 44 min |
| Mar 10, 1:25 PM MST | Special Weather Statement | PIH | 65 min |
| Mar 14, 2:46 AM MDT | Wind Advisory | PIH | 36 hr |
| Mar 14, 2:39 PM MDT | Areal Flood Advisory | PIH | 21 hr |
| Mar 19, 12:50 PM MDT | Winter Weather Advisory | PIH | 46 hr |
| Apr 1, 2:33 AM MDT | Wind Advisory | PIH | 19 hr |
| Apr 8, 8:47 PM MDT | Areal Flood Warning | PIH | 18 hr |
| Apr 9, 2:35 PM MDT | Areal Flood Warning | PIH | 24 hr |
| Apr 10, 2:51 PM MDT | Areal Flood Advisory | PIH | 24 hr |
| Apr 11, 2:45 PM MDT | Areal Flood Warning | PIH | 70 hr |
| Apr 12, 3:00 AM MDT | Winter Weather Advisory | PIH | 35 hr |
| Apr 18, 2:52 AM MDT | Wind Advisory | PIH | 23 hr |
| Apr 24, 1:30 PM MDT | Special Weather Statement | PIH | 90 min |
| Apr 24, 2:35 PM MDT | Special Weather Statement | PIH | 55 min |
| Apr 26, 3:21 PM MDT | Wind Advisory | PIH | 31 hr |
| May 7, 2:34 AM MDT | Frost Advisory | PIH | 31 hr |
| May 10, 2:00 PM MDT | Frost Advisory | PIH | 19 hr |
| May 13, 2:02 AM MDT | Wind Advisory | PIH | 34 hr |
| May 15, 12:02 PM MDT | River Flood Watch | PIH | 24 hr |
| May 16, 12:25 PM MDT | River Flood Warning | PIH | 20 days |
| May 24, 2:37 AM MDT | Flood Watch | PIH | 18 hr |
| May 24, 1:03 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 7:32 PM MDT | Special Weather Statement | PIH | 43 min |
| May 24, 8:06 PM MDT | Special Weather Statement | PIH | 39 min |
| May 26, 12:42 PM MDT | Flash Flood Warning | PIH | 3 hr |
| Jun 1, 6:58 PM MDT | Special Weather Statement | PIH | 32 min |
| Jun 5, 11:14 AM MDT | River Flood Advisory | PIH | 71 hr |
| Jun 8, 6:59 PM MDT | Special Weather Statement | PIH | 46 min |
| Jun 13, 12:46 PM MDT | Wind Advisory | PIH | 33 hr |
| Jun 18, 2:47 AM MDT | Wind Advisory | PIH | 15 hr |
| Jun 19, 8:11 PM MDT | Frost Advisory | PIH | 13 hr |
| Jun 20, 1:51 PM MDT | Frost Advisory | PIH | 19 hr |
| Jun 21, 2:34 PM MDT | Frost Advisory | PIH | 18 hr |
| Jun 23, 1:40 PM MDT | Severe Thunderstorm Warning | PIH | 35 min |
| Jun 23, 2:07 PM MDT | Special Weather Statement | PIH | 23 min |
| Jun 23, 2:32 PM MDT | Special Weather Statement | PIH | 43 min |
| Jun 23, 2:54 PM MDT | Severe Thunderstorm Warning | PIH | 38 min |
| Jun 25, 5:47 PM MDT | Special Weather Statement | PIH | 28 min |
| Jul 4, 5:40 PM MDT | Severe Thunderstorm Warning | PIH | 35 min |
| Jul 13, 12:56 PM MDT | Heat Advisory | PIH | 3 days |
| Jul 16, 2:09 PM MDT | Wind Advisory | PIH | 31 hr |
| Jul 20, 2:23 PM MDT | Heat Advisory | PIH | 3 days |
| Jul 20, 4:08 PM MDT | Severe Thunderstorm Warning | PIH | 37 min |
| Jul 20, 4:41 PM MDT | Special Weather Statement | PIH | 49 min |
| Jul 24, 2:03 PM MDT | Wind Advisory | PIH | 31 hr |
| Jul 24, 2:36 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 24, 3:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 25, 2:34 PM MDT | Red Flag Warning | PIH | 30 hr |
| Jul 26, 2:04 AM MDT | Wind Advisory | PIH | 19 hr |
| Jul 26, 1:42 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 27, 1:59 PM MDT | Red Flag Warning | PIH | 31 hr |
| Jul 29, 1:50 PM MDT | Red Flag Warning | PIH | 31 hr |
| Aug 3, 2:48 AM MDT | Flood Watch | PIH | 17 hr |
| Aug 6, 5:17 PM MDT | Special Weather Statement | PIH | 58 min |
| Aug 6, 6:00 PM MDT | Special Weather Statement | PIH | 45 min |
| Aug 6, 6:26 PM MDT | Special Weather Statement | PIH | 64 min |
| Aug 18, 3:09 AM MDT | Wind Advisory | PIH | 17 hr |
| Aug 19, 1:20 PM MDT | Wind Advisory | PIH | 56 hr |
| Aug 25, 5:57 PM MDT | Special Weather Statement | PIH | 48 min |
| Aug 26, 11:48 AM MDT | Special Weather Statement | PIH | 42 min |
| Aug 28, 1:07 PM MDT | Red Flag Warning | PIH | 32 hr |
| Aug 29, 6:59 PM MDT | Severe Thunderstorm Warning | PIH | 46 min |
| Aug 30, 2:45 AM MDT | Wind Advisory | PIH | 18 hr |
| Aug 31, 2:35 PM MDT | Red Flag Warning | PIH | 30 hr |
| Sep 2, 12:17 PM MDT | Flood Watch | PIH | 37 hr |
| Sep 3, 1:25 PM MDT | Severe Thunderstorm Warning | PIH | 44 min |
| Sep 3, 1:54 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 3, 2:05 PM MDT | Areal Flood Advisory | PIH | 2 hr |
| Sep 3, 4:20 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 7, 9:10 PM MDT | Special Weather Statement | PIH | 35 min |
| Sep 13, 2:13 PM MDT | Special Weather Statement | PIH | 62 min |
| Sep 13, 2:44 PM MDT | Severe Thunderstorm Warning | PIH | 31 min |
| Sep 22, 2:40 AM MDT | Frost Advisory | PIH | 30 hr |
| Sep 22, 7:48 PM MDT | Freeze Warning | PIH | 13 hr |
| Sep 23, 1:49 PM MDT | Frost Advisory | PIH | 19 hr |
| Sep 27, 2:36 PM MDT | Frost Advisory | PIH | 18 hr |
| Sep 28, 1:16 PM MDT | Frost Advisory | PIH | 20 hr |
| Oct 12, 1:43 PM MDT | Frost Advisory | PIH | 19 hr |
| Oct 13, 1:53 PM MDT | Frost Advisory | PIH | 19 hr |
| Oct 14, 1:41 PM MDT | Frost Advisory | PIH | 19 hr |
| Nov 6, 3:26 PM MST | Special Weather Statement | PIH | 64 min |
| Nov 21, 2:35 AM MST | Winter Weather Advisory | PIH | 3 days |
| Nov 27, 11:37 AM MST | Air Stagnation Advisory | PIH | 3 days |
| Nov 30, 1:45 PM MST | Winter Weather Advisory | PIH | 55 hr |
| Dec 2, 3:31 AM MST | Wind Advisory | PIH | 13 hr |
| Dec 5, 6:14 AM MST | Special Weather Statement | PIH | 91 min |
| Dec 6, 2:34 PM MST | Wind Advisory | PIH | 27 hr |
| Dec 10, 2:45 PM MST | Winter Weather Advisory | PIH | 12 hr |
| Dec 13, 1:22 AM MST | Freezing Fog Advisory | PIH | 12 hr |
| Dec 13, 12:56 PM MST | Freezing Fog Advisory | PIH | 23 hr |
| Dec 14, 1:33 PM MST | Freezing Fog Advisory | PIH | 24 hr |
| Dec 15, 1:37 PM MST | Freezing Fog Advisory | PIH | 20 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.