Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2025
72 severe thunderstorm warnings in 2025. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Severe Thunderstorm Warnings
- 72
- Busiest month
- July28 severe thunderstorm warnings
- Busiest day
- July 4, 202511 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
21 of 72 severe thunderstorm warnings covering Idaho in 2025 had a qualifying storm report inside them; 62 of 276 hail, wind and damage reports fell inside a warning, on average 20 minutes after it went out.
Idaho, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 72 | 21 | 71% | 276 | 22% | 20 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 39 | 5 | 87% | 62 | 19% | 24 min |
| NWS Missoula, MT: severe thunderstorm warnings | 9 | 2 | 78% | 12 | 17% | 21 min |
| NWS Spokane, WA: severe thunderstorm warnings | 11 | 1 | 91% | 17 | 12% | 11 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 35 | 14 | 60% | 212 | 22% | 19 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 | Counties | Lasted |
|---|---|---|---|---|
| May 10, 3:33 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Butte, Jefferson | 31 min |
| May 10, 5:38 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson | 22 min |
| May 11, 12:27 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou, Cassia, Oneida and 1 more | 48 min |
| May 11, 1:50 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou | 40 min |
| May 11, 2:07 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 38 min |
| May 11, 2:25 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 50 min |
| May 11, 2:37 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake | 23 min |
| May 11, 2:38 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Teton | 37 min |
| May 11, 6:39 PM MDT | Severe Thunderstorm Warning | OTX | Shoshone | 36 min |
| Jun 11, 1:53 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida | 37 min |
| Jun 11, 2:15 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou, Power | 45 min |
| Jun 11, 2:24 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 51 min |
| Jun 11, 2:53 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 37 min |
| Jun 11, 3:13 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 47 min |
| Jun 11, 3:14 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 46 min |
| Jun 11, 3:43 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin | 47 min |
| Jul 1, 2:27 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 33 min |
| Jul 2, 6:25 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 35 min |
| Jul 4, 12:05 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 40 min |
| Jul 4, 12:39 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 36 min |
| Jul 4, 12:57 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 33 min |
| Jul 4, 1:07 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 38 min |
| Jul 4, 3:55 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 35 min |
| Jul 4, 4:11 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 34 min |
| Jul 4, 4:12 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Power | 33 min |
| Jul 4, 4:23 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 52 min |
| Jul 4, 4:32 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou, Power | 28 min |
| Jul 4, 4:38 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 18 min |
| Jul 4, 4:56 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou | 34 min |
| Jul 4, 7:49 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Caribou | 26 min |
| Jul 9, 7:20 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore | 40 min |
| Jul 14, 4:34 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 26 min |
| Jul 15, 6:09 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou, Franklin, Oneida | 36 min |
| Jul 15, 6:25 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Caribou and 1 more | 50 min |
| Jul 15, 6:41 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou, Franklin | 49 min |
| Jul 26, 6:11 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore, Owyhee | 64 min |
| Jul 26, 8:21 PM MDT | Severe Thunderstorm Warning | BOI | Payette, Washington | 39 min |
| Jul 27, 7:18 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 42 min |
| Jul 31, 1:30 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 45 min |
| Jul 31, 2:08 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 52 min |
| Jul 31, 2:15 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 45 min |
| Jul 31, 2:38 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 37 min |
| Jul 31, 2:57 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 48 min |
| Jul 31, 3:24 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai, Shoshone | 23 min |
| Aug 1, 5:57 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 12 min |
| Aug 1, 10:00 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 45 min |
| Aug 4, 5:55 PM MDT | Severe Thunderstorm Warning | BOI | Payette, Washington | 35 min |
| Aug 7, 1:53 PM MDT | Severe Thunderstorm Warning | OTX | Nez Perce | 23 min |
| Aug 7, 2:20 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 25 min |
| Aug 29, 2:54 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Boundary | 25 min |
| Aug 29, 4:00 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 30 min |
| Aug 29, 4:12 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 33 min |
| Aug 29, 4:35 PM MDT | Severe Thunderstorm Warning | BOI | Gooding | 25 min |
| Aug 29, 5:23 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 37 min |
| Sep 6, 5:03 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 42 min |
| Sep 7, 2:33 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 42 min |
| Sep 7, 2:54 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 21 min |
| Sep 11, 5:35 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 25 min |
| Sep 11, 8:21 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 24 min |
| Sep 11, 8:24 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 21 min |
| Sep 21, 2:29 PM MDT | Severe Thunderstorm Warning | BOI | Gooding, Jerome | 46 min |
| Sep 21, 2:56 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 34 min |
| Dec 17, 6:29 AM MST | Severe Thunderstorm Warning | OTX | Latah, Lewis, Nez Perce | 46 min |
| Dec 17, 7:14 AM MST | Severe Thunderstorm Warning | OTX | Shoshone | 46 min |
| Dec 17, 7:28 AM MST | Severe Thunderstorm Warning | BOI | Adams, Gem, Valley, Washington | 47 min |
| Dec 17, 8:09 AM MST | Severe Thunderstorm Warning | BOI | Gem, Valley, Washington | 21 min |
| Dec 17, 8:33 AM MST | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Jerome, Owyhee, Twin Falls | 42 min |
| Dec 17, 9:09 AM MST | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Jerome, Owyhee, Twin Falls | 51 min |
| Dec 17, 9:52 AM MST | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Bingham, Blaine, Bonneville, Caribou and 4 more | 53 min |
| Dec 17, 9:56 AM MST | Severe Thunderstorm Warning | BOI | Jerome, Owyhee, Twin Falls | 49 min |
| Dec 17, 10:43 AM MST | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Bingham, Bonneville, Caribou, Cassia and 3 more | 47 min |
| Dec 17, 11:30 AM MST | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou, Cassia, Franklin, Oneida | 30 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Caribou County18
- Owyhee County16
- Bingham County15
- Bannock County15
- Cassia County12
- Power County12
- Bonneville County11
- Oneida County8
- Bear Lake County6
- Franklin County6
- Washington County5
- Elmore County5
- Ada County4
- Twin Falls County4
- Bonner County4
- Gooding County4
- Jerome County4
- Butte County3
- Shoshone County3
- Canyon County3
- Blaine County3
- Lewis County3
- Jefferson County2
- Clark County2
- Fremont County2
- Custer County2
- Payette County2
- Nez Perce County2
- Gem County2
- Valley County2
- Teton County1
- Kootenai County1
- Boundary County1
- Idaho County1
- Latah County1
- Adams County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.