Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2023
94 severe thunderstorm warnings in 2023. 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 2023. Tap one for its archive.
- Severe Thunderstorm Warnings
- 94
- Busiest month
- May34 severe thunderstorm warnings
- Busiest day
- May 26, 20239 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.
30 of 94 severe thunderstorm warnings covering Idaho in 2023 had a qualifying storm report inside them; 84 of 237 hail, wind and damage reports fell inside a warning, on average 16 minutes after it went out.
Idaho, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 94 | 30 | 68% | 237 | 35% | 16 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Spokane, WA: severe thunderstorm warnings | 36 | 19 | 47% | 116 | 57% | 16 min |
| NWS Boise, ID: severe thunderstorm warnings | 40 | 8 | 80% | 40 | 45% | 11 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 55 | 17 | 69% | 155 | 27% | 20 min |
| NWS Missoula, MT: severe thunderstorm warnings | 13 | 3 | 77% | 25 | 20% | 10 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 2, 6:14 PM MDT | Severe Thunderstorm Warning | OTX | Shoshone | 46 min |
| May 15, 2:32 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 43 min |
| May 15, 4:57 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 33 min |
| May 15, 5:29 PM MDT | Severe Thunderstorm Warning | PIH | Oneida, Power | 31 min |
| May 21, 5:14 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 26 min |
| May 21, 5:29 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 46 min |
| May 21, 6:08 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 37 min |
| May 21, 8:29 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 31 min |
| May 21, 10:29 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Boundary | 46 min |
| May 23, 4:56 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 49 min |
| May 23, 5:44 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville | 46 min |
| May 23, 6:23 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 37 min |
| May 24, 2:50 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Cassia, Power | 40 min |
| May 24, 2:57 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Lincoln, Minidoka | 63 min |
| May 24, 2:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 47 min |
| May 24, 3:33 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 42 min |
| May 24, 4:01 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Lincoln, Minidoka, Power | 59 min |
| May 24, 5:44 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Power | 29 min |
| May 25, 2:50 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 40 min |
| May 25, 3:26 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee, Twin Falls | 49 min |
| May 25, 4:11 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee, Twin Falls | 34 min |
| May 25, 8:31 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 44 min |
| May 26, 2:16 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 44 min |
| May 26, 2:55 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 35 min |
| May 26, 3:27 PM MDT | Severe Thunderstorm Warning | PIH | Lincoln | 33 min |
| May 26, 3:31 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 29 min |
| May 26, 3:37 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Power | 53 min |
| May 26, 4:15 PM MDT | Severe Thunderstorm Warning | PIH | Blaine | 16 min |
| May 26, 4:16 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Butte, Minidoka, Power | 59 min |
| May 26, 5:12 PM MDT | Severe Thunderstorm Warning | PIH | Butte | 48 min |
| May 30, 5:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 42 min |
| May 31, 4:12 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 48 min |
| May 31, 4:24 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Owyhee | 36 min |
| May 31, 4:55 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Owyhee, Twin Falls | 50 min |
| Jun 1, 4:16 PM MDT | Severe Thunderstorm Warning | PIH | Franklin, Oneida | 29 min |
| Jun 1, 4:50 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin | 25 min |
| Jun 1, 5:06 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Franklin, Oneida | 24 min |
| Jun 6, 5:17 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 31 min |
| Jun 6, 5:57 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Cassia, Oneida, Power | 48 min |
| Jun 6, 7:59 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 46 min |
| Jun 6, 8:22 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 38 min |
| Jun 6, 8:54 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 51 min |
| Jun 7, 5:24 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise | 51 min |
| Jun 8, 4:08 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 22 min |
| Jun 8, 4:28 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 47 min |
| Jun 8, 5:10 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 50 min |
| Jun 9, 5:08 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 25 min |
| Jun 9, 5:10 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Latah, Shoshone | 50 min |
| Jun 9, 5:51 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 39 min |
| Jun 10, 2:48 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 27 min |
| Jun 11, 2:49 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham | 26 min |
| Jun 11, 5:33 PM MDT | Severe Thunderstorm Warning | BOI | Ada | 27 min |
| Jun 13, 2:15 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 30 min |
| Jun 13, 4:17 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 22 min |
| Jun 13, 5:02 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 28 min |
| Jun 13, 5:15 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Kootenai | 30 min |
| Jun 13, 7:31 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 29 min |
| Jun 13, 9:57 PM MDT | Severe Thunderstorm Warning | BOI | Payette, Washington | 33 min |
| Jun 13, 11:21 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise | 39 min |
| Jun 23, 1:40 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Jefferson | 35 min |
| Jun 23, 2:54 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Clark, Fremont, Jefferson, Madison | 38 min |
| Jun 27, 2:41 PM MDT | Severe Thunderstorm Warning | OTX | Shoshone | 34 min |
| Jul 1, 2:26 PM MDT | Severe Thunderstorm Warning | PIH | Butte | 34 min |
| Jul 1, 5:52 PM MDT | Severe Thunderstorm Warning | PIH | Teton | 23 min |
| Jul 3, 1:32 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou | 43 min |
| Jul 3, 2:05 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Caribou | 25 min |
| Jul 4, 5:40 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Jefferson | 35 min |
| Jul 10, 8:11 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 37 min |
| Jul 20, 4:08 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Butte, Jefferson | 37 min |
| Jul 21, 5:06 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Franklin | 24 min |
| Jul 21, 5:48 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 14 min |
| Jul 23, 6:43 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Butte, Caribou, Power | 31 min |
| Jul 24, 7:00 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Cassia, Franklin, Oneida, Power | 60 min |
| Jul 24, 8:38 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 52 min |
| Jul 27, 4:19 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou | 26 min |
| Jul 27, 4:41 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Caribou | 34 min |
| Aug 5, 9:22 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 38 min |
| Aug 7, 3:58 PM MDT | Severe Thunderstorm Warning | BOI | Payette, Washington | 47 min |
| Aug 7, 4:48 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Gem | 27 min |
| Aug 8, 1:32 AM MDT | Severe Thunderstorm Warning | PIH | Caribou | 25 min |
| Aug 22, 4:56 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 49 min |
| Aug 22, 8:46 PM MDT | Severe Thunderstorm Warning | BOI | Boise, Elmore | 44 min |
| Aug 26, 1:50 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 25 min |
| Aug 29, 5:10 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 35 min |
| Aug 29, 5:55 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 35 min |
| Aug 29, 6:59 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Jefferson | 46 min |
| Sep 1, 3:44 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 23 min |
| Sep 1, 8:20 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 22 min |
| Sep 3, 1:25 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson, Madison | 44 min |
| Sep 3, 5:43 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin | 32 min |
| Sep 3, 5:54 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 34 min |
| Sep 3, 6:20 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin, Oneida | 40 min |
| Sep 13, 2:44 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson | 31 min |
| Sep 20, 4:02 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou | 26 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bannock County20
- Bingham County16
- Power County15
- Owyhee County13
- Caribou County13
- Bonneville County12
- Cassia County11
- Franklin County9
- Ada County8
- Oneida County7
- Butte County7
- Jefferson County7
- Elmore County6
- Bonner County5
- Blaine County5
- Twin Falls County5
- Kootenai County5
- Bear Lake County5
- Shoshone County3
- Idaho County3
- Lincoln County3
- Minidoka County3
- Boise County3
- Benewah County3
- Washington County3
- Clark County3
- Fremont County3
- Canyon County2
- Payette County2
- Madison County2
- Boundary County1
- Gooding County1
- Lewis County1
- Nez Perce County1
- Latah County1
- Teton County1
- Gem County1
- Clearwater County1
- Jerome County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe 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.