Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2008
93 severe thunderstorm warnings in 2008. 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 2008. Tap one for its archive.
- Severe Thunderstorm Warnings
- 93
- Busiest month
- July37 severe thunderstorm warnings
- Busiest day
- July 22, 200822 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 93 severe thunderstorm warnings covering Idaho in 2008 had a qualifying storm report inside them; 28 of 62 hail, wind and damage reports fell inside a warning, on average 17 minutes after it went out.
Idaho, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 93 | 21 | 77% | 62 | 45% | 17 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 38 | 11 | 71% | 30 | 67% | 17 min |
| NWS Spokane, WA: severe thunderstorm warnings | 31 | 15 | 52% | 27 | 85% | 22 min |
| NWS Boise, ID: severe thunderstorm warnings | 21 | 9 | 57% | 29 | 62% | 16 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 53 | 5 | 91% | 23 | 26% | 7 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 21, 12:16 AM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 50 min |
| May 28, 12:35 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 40 min |
| May 28, 12:55 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Cassia, Power | 50 min |
| May 28, 2:54 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Butte, Jefferson | 36 min |
| May 28, 3:03 PM MDT | Severe Thunderstorm Warning | OTX | Latah | 57 min |
| May 28, 3:29 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson, Madison | 46 min |
| May 28, 5:54 PM MDT | Severe Thunderstorm Warning | PIH | Oneida, Power | 36 min |
| May 28, 6:49 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 33 min |
| May 28, 7:18 PM MDT | Severe Thunderstorm Warning | PIH | Bannock | 25 min |
| Jun 11, 6:40 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 50 min |
| Jun 21, 6:32 PM MDT | Severe Thunderstorm Warning | BOI | Ada | 43 min |
| Jun 21, 7:01 PM MDT | Severe Thunderstorm Warning | BOI | Elmore | 44 min |
| Jun 21, 9:36 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Lincoln, Minidoka | 54 min |
| Jun 25, 6:26 PM MDT | Severe Thunderstorm Warning | PIH | Clark | 33 min |
| Jun 25, 6:40 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 35 min |
| Jun 30, 2:40 PM MDT | Severe Thunderstorm Warning | PIH | Power | 50 min |
| Jun 30, 3:00 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 30 min |
| Jun 30, 3:00 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 30 min |
| Jun 30, 3:12 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 63 min |
| Jun 30, 3:33 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 42 min |
| Jun 30, 3:52 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 38 min |
| Jun 30, 5:00 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 45 min |
| Jun 30, 6:36 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 39 min |
| Jul 1, 12:20 PM MDT | Severe Thunderstorm Warning | PIH | Clark | 25 min |
| Jul 1, 4:18 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater | 30 min |
| Jul 1, 4:49 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 56 min |
| Jul 1, 7:48 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 42 min |
| Jul 1, 8:24 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 76 min |
| Jul 4, 6:20 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 40 min |
| Jul 4, 6:57 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 26 min |
| Jul 6, 7:43 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark | 32 min |
| Jul 6, 8:14 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark | 21 min |
| Jul 6, 9:12 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 48 min |
| Jul 20, 4:35 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Power | 30 min |
| Jul 21, 2:53 PM MDT | Severe Thunderstorm Warning | PIH | Teton | 43 min |
| Jul 22, 10:35 AM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon | 25 min |
| Jul 22, 11:43 AM MDT | Severe Thunderstorm Warning | BOI | Boise | 47 min |
| Jul 22, 1:10 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 50 min |
| Jul 22, 1:41 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 64 min |
| Jul 22, 2:02 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 43 min |
| Jul 22, 2:06 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee, Twin Falls | 39 min |
| Jul 22, 2:11 PM MDT | Severe Thunderstorm Warning | MSO | Idaho, Lemhi | 64 min |
| Jul 22, 2:20 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 25 min |
| Jul 22, 2:30 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 45 min |
| Jul 22, 2:33 PM MDT | Severe Thunderstorm Warning | BOI | Jerome | 42 min |
| Jul 22, 2:39 PM MDT | Severe Thunderstorm Warning | PIH | Lincoln, Minidoka | 51 min |
| Jul 22, 2:42 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 59 min |
| Jul 22, 3:13 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 45 min |
| Jul 22, 3:28 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Minidoka | 32 min |
| Jul 22, 3:35 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Madison, Teton | 33 min |
| Jul 22, 3:43 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 14 min |
| Jul 22, 4:00 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Minidoka, Power | 45 min |
| Jul 22, 4:12 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Madison, Teton | 48 min |
| Jul 22, 4:26 PM MDT | Severe Thunderstorm Warning | PIH | Teton | 19 min |
| Jul 22, 4:45 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 45 min |
| Jul 22, 4:58 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Teton | 32 min |
| Jul 22, 5:31 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 29 min |
| Jul 22, 6:30 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 37 min |
| Jul 22, 6:37 PM MDT | Severe Thunderstorm Warning | PIH | Madison, Teton | 23 min |
| Aug 7, 6:21 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 24 min |
| Aug 7, 7:09 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 36 min |
| Aug 8, 3:53 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 52 min |
| Aug 8, 4:03 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 57 min |
| Aug 8, 4:21 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 54 min |
| Aug 8, 4:42 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 34 min |
| Aug 8, 4:54 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 51 min |
| Aug 8, 5:08 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 55 min |
| Aug 8, 5:42 PM MDT | Severe Thunderstorm Warning | PIH | Blaine | 33 min |
| Aug 8, 5:51 PM MDT | Severe Thunderstorm Warning | OTX | Nez Perce | 39 min |
| Aug 8, 6:25 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 65 min |
| Aug 8, 6:36 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 24 min |
| Aug 8, 6:59 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 46 min |
| Aug 8, 7:30 PM MDT | Severe Thunderstorm Warning | OTX | Latah, Lewis, Nez Perce | 20 min |
| Aug 8, 7:37 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater | 38 min |
| Aug 8, 7:45 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Jefferson | 60 min |
| Aug 8, 8:06 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Butte, Jefferson | 39 min |
| Aug 8, 8:25 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 50 min |
| Aug 8, 8:43 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 32 min |
| Aug 9, 11:39 AM MDT | Severe Thunderstorm Warning | PIH | Custer | 36 min |
| Aug 9, 12:23 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 52 min |
| Aug 9, 12:23 PM MDT | Severe Thunderstorm Warning | PIH | Clark | 22 min |
| Aug 9, 1:01 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 44 min |
| Aug 9, 1:59 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 16 min |
| Aug 9, 2:06 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 39 min |
| Aug 9, 4:17 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 28 min |
| Aug 10, 3:42 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 33 min |
| Aug 18, 9:01 PM MDT | Severe Thunderstorm Warning | OTX | Latah | 44 min |
| Aug 18, 9:33 PM MDT | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 57 min |
| Aug 18, 9:57 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Kootenai | 48 min |
| Aug 18, 10:25 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Boundary, Kootenai | 50 min |
| Aug 21, 12:50 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 40 min |
| Aug 31, 4:02 PM MDT | Severe Thunderstorm Warning | PIH | Jefferson, Madison | 28 min |
| Aug 31, 4:15 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 32 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bingham County9
- Clark County9
- Twin Falls County8
- Power County8
- Bonneville County8
- Custer County8
- Butte County7
- Cassia County6
- Fremont County6
- Kootenai County6
- Teton County6
- Lemhi County5
- Bannock County5
- Jefferson County5
- Madison County5
- Jerome County4
- Ada County4
- Minidoka County4
- Owyhee County4
- Latah County3
- Bonner County3
- Canyon County3
- Caribou County3
- Washington County3
- Clearwater County3
- Idaho County3
- Blaine County3
- Nez Perce County3
- Oneida County2
- Elmore County2
- Lincoln County2
- Lewis County2
- Boise County1
- Benewah County1
- Boundary County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20072009
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.