Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2026
111 severe thunderstorm warnings in 2026. 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 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 111
- Busiest month
- May44 severe thunderstorm warnings
- Busiest day
- May 29, 202614 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.
42 of 111 severe thunderstorm warnings covering Idaho in 2026 had a qualifying storm report inside them; 135 of 277 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.
Idaho, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 111 | 42 | 62% | 277 | 49% | 23 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Spokane, WA: severe thunderstorm warnings | 30 | 12 | 60% | 40 | 60% | 26 min |
| NWS Missoula, MT: severe thunderstorm warnings | 25 | 8 | 68% | 25 | 32% | 14 min |
| NWS Boise, ID: severe thunderstorm warnings | 46 | 10 | 78% | 43 | 60% | 23 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 58 | 27 | 53% | 220 | 47% | 24 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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 |
|---|---|---|---|---|
| Apr 11, 1:40 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 35 min |
| Apr 11, 2:22 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 38 min |
| Apr 12, 1:37 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Lincoln, Minidoka, Power | 23 min |
| Apr 12, 1:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Butte, Cassia, Minidoka and 1 more | 32 min |
| Apr 12, 2:28 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Caribou, Power | 32 min |
| Apr 12, 2:57 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Butte, Clark, Jefferson | 33 min |
| May 13, 1:28 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Clark, Fremont, Jefferson, Madison | 62 min |
| May 13, 1:46 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Cassia and 4 more | 59 min |
| May 13, 2:31 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Fremont, Jefferson | 44 min |
| May 13, 2:43 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Caribou and 5 more | 49 min |
| May 13, 3:03 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida | 42 min |
| May 13, 3:30 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Bingham, Bonneville, Caribou, Franklin and 6 more | 45 min |
| May 13, 3:47 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson | 28 min |
| May 13, 4:05 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Caribou, Franklin | 27 min |
| May 13, 4:15 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 30 min |
| May 13, 4:19 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Bingham, Bonneville, Caribou, Fremont and 5 more | 41 min |
| May 13, 5:02 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Bingham, Bonneville, Caribou, Madison and 1 more | 43 min |
| May 13, 5:15 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Butte, Cassia, Minidoka, Power | 45 min |
| May 25, 3:48 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon | 27 min |
| May 25, 4:00 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Canyon, Elmore, Gem | 45 min |
| May 25, 4:44 PM MDT | Severe Thunderstorm Warning | BOI | Boise, Gem, Payette, Valley, Washington | 46 min |
| May 25, 5:28 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Boise, Gem, Valley, Washington | 47 min |
| May 25, 6:11 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Valley | 34 min |
| May 26, 3:00 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Teton | 45 min |
| May 26, 3:41 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 34 min |
| May 27, 3:19 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Valley, Washington | 41 min |
| May 27, 4:22 PM MDT | Severe Thunderstorm Warning | BOI | Adams | 26 min |
| May 28, 3:17 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore, Owyhee | 43 min |
| May 28, 3:24 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Washington | 31 min |
| May 28, 3:38 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Canyon, Elmore, Gem, Owyhee | 37 min |
| May 28, 4:05 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Washington | 40 min |
| May 28, 4:09 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Canyon, Elmore, Gem, Payette and 2 more | 44 min |
| May 28, 4:18 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 42 min |
| May 28, 4:45 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 33 min |
| May 28, 4:48 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 38 min |
| May 28, 5:43 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Shoshone | 17 min |
| May 28, 6:09 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 31 min |
| May 28, 6:11 PM MDT | Severe Thunderstorm Warning | OTX | Latah, Shoshone | 49 min |
| May 28, 6:38 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater | 52 min |
| May 28, 6:47 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 34 min |
| May 28, 6:49 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 41 min |
| May 28, 7:29 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Latah | 31 min |
| May 28, 7:35 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater | 30 min |
| May 28, 7:44 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Latah, Shoshone | 46 min |
| May 28, 7:52 PM MDT | Severe Thunderstorm Warning | OTX | Shoshone | 38 min |
| May 28, 8:00 PM MDT | Severe Thunderstorm Warning | OTX | Shoshone | 45 min |
| May 28, 8:14 PM MDT | Severe Thunderstorm Warning | OTX | Shoshone | 47 min |
| May 28, 8:29 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai, Shoshone | 32 min |
| May 28, 8:41 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Shoshone | 32 min |
| May 28, 9:22 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 26 min |
| Jun 9, 3:38 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 37 min |
| Jun 20, 4:08 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin, Oneida | 37 min |
| Jun 25, 2:19 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 41 min |
| Jun 26, 7:15 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Payette | 34 min |
| Jun 26, 8:22 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon | 38 min |
| Jun 26, 8:41 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise | 49 min |
| Jun 27, 12:52 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou, Franklin | 38 min |
| Jun 27, 12:59 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 46 min |
| Jun 27, 1:29 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 46 min |
| Jul 1, 3:50 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 23 min |
| Jul 8, 4:03 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 10 min |
| Jul 8, 4:11 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 64 min |
| Jul 8, 4:23 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 12 min |
| Jul 8, 4:33 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 27 min |
| Jul 15, 6:21 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 27 min |
| Jul 16, 4:30 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 45 min |
| Jul 16, 5:06 PM MDT | Severe Thunderstorm Warning | BOI | Gooding, Owyhee, Twin Falls | 39 min |
| Jul 16, 5:13 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 47 min |
| Jul 16, 5:14 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 46 min |
| Jul 16, 6:00 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 15 min |
| Jul 17, 5:00 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 29 min |
| Jul 17, 6:37 PM MDT | Severe Thunderstorm Warning | BOI | Boise | 27 min |
| Jul 21, 4:10 PM MDT | Severe Thunderstorm Warning | PIH | Bannock | 35 min |
| Jul 23, 5:27 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 33 min |
| Jul 23, 5:55 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 35 min |
| Jul 23, 7:24 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater | 36 min |
| Jul 23, 8:47 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise | 43 min |
| Jul 24, 6:16 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 14 min |
| Jul 28, 5:14 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 46 min |
| Jul 29, 3:59 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 46 min |
| Jul 29, 5:28 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 47 min |
| Jul 29, 5:57 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 48 min |
| Aug 15, 3:19 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Owyhee | 41 min |
| Aug 15, 5:52 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 27 min |
| Aug 15, 8:58 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Bonneville, Butte, Power | 47 min |
| Aug 22, 2:12 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou, Power | 35 min |
| Aug 22, 6:17 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Bonneville, Butte, Jefferson, Power | 43 min |
| Aug 23, 3:09 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 36 min |
| Aug 23, 3:20 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 40 min |
| Aug 23, 3:43 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 47 min |
| Aug 23, 3:54 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 30 min |
| Aug 23, 3:57 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 48 min |
| Aug 23, 5:05 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida | 40 min |
| Aug 24, 2:29 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 46 min |
| Aug 24, 3:10 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Minidoka, Power | 35 min |
| Sep 1, 4:24 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 21 min |
| Sep 6, 6:22 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Kootenai, Shoshone | 20 min |
| Sep 17, 12:43 AM MDT | Severe Thunderstorm Warning | BOI | Gooding, Jerome, Twin Falls | 47 min |
| Sep 17, 1:47 PM MDT | Severe Thunderstorm Warning | PIH | Oneida, Power | 28 min |
| Sep 17, 2:12 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Butte | 33 min |
| Sep 17, 2:14 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 16 min |
| Sep 17, 2:29 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Butte, Minidoka, Power | 46 min |
| Sep 17, 2:43 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Butte, Jefferson | 47 min |
| Sep 17, 3:28 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Butte, Jefferson | 62 min |
| Sep 17, 4:16 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Clark, Fremont, Jefferson, Madison | 44 min |
| Sep 17, 7:32 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake | 29 min |
| Sep 17, 9:08 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 52 min |
| Sep 17, 9:32 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 43 min |
| Sep 17, 10:05 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Oneida, Power | 29 min |
| Sep 17, 10:11 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson | 36 min |
| Sep 17, 10:37 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou, Power | 38 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bingham County26
- Power County24
- Bannock County22
- Bonneville County15
- Caribou County13
- Jefferson County13
- Cassia County12
- Butte County12
- Blaine County11
- Fremont County11
- Bear Lake County10
- Oneida County10
- Owyhee County10
- Canyon County9
- Shoshone County9
- Franklin County8
- Minidoka County8
- Ada County8
- Boise County8
- Clark County6
- Washington County6
- Adams County6
- Idaho County6
- Clearwater County6
- Madison County5
- Elmore County5
- Gem County5
- Valley County5
- Lewis County5
- Teton County4
- Benewah County4
- Twin Falls County4
- Payette County3
- Latah County3
- Bonner County3
- Lincoln County2
- Kootenai County2
- Gooding County2
- Jerome County2
- Nez Perce County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
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.