Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2019
84 severe thunderstorm warnings in 2019. 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 2019. Tap one for its archive.
- Severe Thunderstorm Warnings
- 84
- Busiest month
- June21 severe thunderstorm warnings
- Busiest day
- August 11, 20199 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.
28 of 84 severe thunderstorm warnings covering Idaho in 2019 had a qualifying storm report inside them; 63 of 144 hail, wind and damage reports fell inside a warning, on average 16 minutes after it went out.
Idaho, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 84 | 28 | 67% | 144 | 44% | 16 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pocatello, ID: severe thunderstorm warnings | 35 | 8 | 77% | 88 | 40% | 16 min |
| NWS Missoula, MT: severe thunderstorm warnings | 35 | 14 | 60% | 52 | 35% | 9 min |
| NWS Spokane, WA: severe thunderstorm warnings | 26 | 11 | 58% | 35 | 57% | 24 min |
| NWS Boise, ID: severe thunderstorm warnings | 40 | 9 | 78% | 29 | 45% | 9 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 |
|---|---|---|---|---|
| Apr 26, 1:12 PM MDT | Severe Thunderstorm Warning | PIH | Franklin, Oneida | 28 min |
| May 16, 3:35 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 25 min |
| May 16, 5:12 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Latah, Shoshone | 35 min |
| May 26, 12:11 PM MDT | Severe Thunderstorm Warning | PIH | Blaine | 49 min |
| May 26, 1:36 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 18 min |
| May 26, 2:05 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 40 min |
| May 26, 2:30 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Jefferson | 30 min |
| May 27, 2:31 PM MDT | Severe Thunderstorm Warning | BOI | Elmore | 44 min |
| May 27, 2:53 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Owyhee | 52 min |
| May 27, 3:12 PM MDT | Severe Thunderstorm Warning | BOI | Elmore | 48 min |
| May 27, 3:45 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Owyhee, Twin Falls | 45 min |
| Jun 2, 4:50 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 40 min |
| Jun 6, 2:42 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Oneida, Power | 48 min |
| Jun 6, 2:57 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 33 min |
| Jun 6, 3:17 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Butte, Cassia, Power | 43 min |
| Jun 6, 3:53 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 52 min |
| Jun 6, 3:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Power | 47 min |
| Jun 6, 4:59 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Butte, Clark, Jefferson | 22 min |
| Jun 6, 5:46 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson, Madison, Teton | 44 min |
| Jun 6, 6:42 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Caribou | 33 min |
| Jun 6, 6:45 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Cassia, Power | 45 min |
| Jun 6, 7:22 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Caribou, Power | 38 min |
| Jun 6, 7:53 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Jefferson | 37 min |
| Jun 6, 8:26 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Clark, Fremont, Jefferson, Madison and 1 more | 49 min |
| Jun 12, 6:29 PM MDT | Severe Thunderstorm Warning | BOI | Payette | 46 min |
| Jun 12, 6:45 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 30 min |
| Jun 12, 7:13 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 32 min |
| Jun 13, 2:16 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 21 min |
| Jun 13, 4:07 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 38 min |
| Jun 13, 9:05 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 40 min |
| Jun 18, 5:04 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Madison | 41 min |
| Jun 26, 4:50 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 40 min |
| Jul 8, 2:29 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 46 min |
| Jul 8, 3:55 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 50 min |
| Jul 8, 6:56 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 34 min |
| Jul 12, 4:51 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 39 min |
| Jul 12, 5:29 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Owyhee | 31 min |
| Jul 12, 5:56 PM MDT | Severe Thunderstorm Warning | BOI | Camas, Elmore, Gooding | 34 min |
| Jul 12, 9:20 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 40 min |
| Jul 14, 3:44 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou | 49 min |
| Jul 16, 7:17 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 43 min |
| Jul 22, 9:19 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 26 min |
| Jul 23, 9:57 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 48 min |
| Jul 23, 10:35 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Kootenai, Shoshone | 55 min |
| Jul 23, 10:53 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Boundary | 67 min |
| Jul 29, 5:54 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 66 min |
| Jul 29, 6:00 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin, Oneida, Power | 60 min |
| Jul 30, 3:57 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 33 min |
| Jul 30, 8:49 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 44 min |
| Aug 4, 7:47 PM MDT | Severe Thunderstorm Warning | PIH | Teton | 13 min |
| Aug 9, 7:48 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 42 min |
| Aug 10, 1:59 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 31 min |
| Aug 10, 4:26 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 49 min |
| Aug 10, 5:08 PM MDT | Severe Thunderstorm Warning | BOI | Elmore | 37 min |
| Aug 10, 5:20 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 40 min |
| Aug 10, 5:32 PM MDT | Severe Thunderstorm Warning | OTX | Latah | 43 min |
| Aug 10, 5:44 PM MDT | Severe Thunderstorm Warning | BOI | Boise, Elmore | 61 min |
| Aug 10, 5:44 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 46 min |
| Aug 10, 6:03 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai, Shoshone | 45 min |
| Aug 10, 6:08 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 52 min |
| Aug 10, 6:53 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 52 min |
| Aug 10, 7:10 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 25 min |
| Aug 10, 7:16 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 44 min |
| Aug 10, 7:37 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 53 min |
| Aug 10, 7:39 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 51 min |
| Aug 10, 8:14 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Kootenai | 24 min |
| Aug 11, 11:58 AM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 32 min |
| Sep 6, 12:31 PM MDT | Severe Thunderstorm Warning | BOI | Camas, Elmore, Gooding, Owyhee | 44 min |
| Sep 6, 12:44 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Jerome, Owyhee, Twin Falls | 46 min |
| Sep 6, 1:26 PM MDT | Severe Thunderstorm Warning | BOI | Gooding, Jerome, Twin Falls | 49 min |
| Sep 6, 4:05 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 55 min |
| Sep 6, 5:12 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Owyhee | 63 min |
| Sep 9, 6:53 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 29 min |
| Sep 9, 7:36 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 24 min |
| Sep 9, 7:54 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Lincoln, Minidoka | 51 min |
| Sep 10, 2:28 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 47 min |
| Sep 10, 4:14 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 46 min |
| Sep 10, 4:53 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida | 25 min |
| Sep 10, 5:17 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 43 min |
| Oct 19, 12:31 PM MDT | Severe Thunderstorm Warning | BOI | Elmore | 29 min |
| Oct 19, 2:28 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 32 min |
| Oct 19, 2:35 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 40 min |
| Oct 19, 2:52 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Cassia, Minidoka, Power | 38 min |
| Oct 19, 3:27 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 29 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Owyhee County17
- Bingham County13
- Elmore County12
- Cassia County10
- Power County10
- Bannock County10
- Kootenai County10
- Bonneville County8
- Blaine County7
- Twin Falls County6
- Oneida County5
- Canyon County5
- Butte County5
- Jefferson County5
- Gooding County5
- Caribou County5
- Jerome County5
- Franklin County4
- Benewah County4
- Clark County4
- Fremont County4
- Bonner County4
- Idaho County3
- Shoshone County3
- Custer County3
- Madison County3
- Teton County3
- Bear Lake County3
- Lemhi County3
- Minidoka County3
- Latah County2
- Camas County2
- Ada County2
- Clearwater County1
- Payette County1
- Lewis County1
- Nez Perce County1
- Boundary County1
- Boise County1
- Lincoln County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe 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.