Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2010
123 severe thunderstorm warnings in 2010. 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 2010. Tap one for its archive.
- Severe Thunderstorm Warnings
- 123
- Busiest month
- August41 severe thunderstorm warnings
- Busiest day
- July 31, 201013 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.
35 of 123 severe thunderstorm warnings covering Idaho in 2010 had a qualifying storm report inside them; 58 of 109 hail, wind and damage reports fell inside a warning, on average 24 minutes after it went out.
Idaho, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 123 | 35 | 72% | 109 | 53% | 24 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 53 | 23 | 57% | 67 | 55% | 19 min |
| NWS Salt Lake City, UT: severe thunderstorm warnings | 101 | 15 | 85% | 73 | 41% | 23 min |
| NWS Spokane, WA: severe thunderstorm warnings | 16 | 6 | 63% | 22 | 73% | 23 min |
| NWS Boise, ID: severe thunderstorm warnings | 49 | 8 | 84% | 23 | 39% | 19 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 59 | 15 | 75% | 49 | 47% | 26 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 20, 5:54 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore, Owyhee | 51 min |
| Apr 20, 5:57 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 48 min |
| Apr 20, 6:30 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore, Owyhee | 37 min |
| Apr 27, 5:31 PM MDT | Severe Thunderstorm Warning | BOI | Boise, Valley | 24 min |
| Apr 27, 7:06 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Custer | 39 min |
| May 17, 7:45 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Canyon | 45 min |
| May 27, 1:04 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 41 min |
| Jun 4, 1:37 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Adams, Boise, Canyon, Gem, Payette and 2 more | 53 min |
| Jun 4, 3:18 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Lincoln, Minidoka | 29 min |
| Jun 4, 5:08 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Madison, Teton | 37 min |
| Jun 6, 4:23 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Gem, Payette | 67 min |
| Jun 6, 6:57 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Caribou | 39 min |
| Jun 6, 8:17 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 43 min |
| Jun 9, 5:32 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Washington | 43 min |
| Jun 9, 6:12 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Valley | 48 min |
| Jun 15, 5:37 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou | 38 min |
| Jun 15, 5:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 33 min |
| Jun 15, 6:17 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 20 min |
| Jun 15, 6:56 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Jefferson | 49 min |
| Jun 16, 3:12 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Caribou | 48 min |
| Jun 19, 3:18 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 42 min |
| Jun 19, 5:27 PM MDT | Severe Thunderstorm Warning | PIH | Madison, Teton | 33 min |
| Jun 20, 3:57 PM MDT | Severe Thunderstorm Warning | PIH | Clark | 48 min |
| Jun 20, 4:09 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 33 min |
| Jun 20, 4:48 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 13 min |
| Jun 25, 2:32 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 23 min |
| Jun 28, 10:29 PM MDT | Severe Thunderstorm Warning | OTX | Latah, Lewis, Nez Perce | 61 min |
| Jun 29, 4:54 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 51 min |
| Jun 29, 5:44 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 46 min |
| Jun 29, 6:31 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 44 min |
| Jun 29, 6:39 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Payette, Washington | 51 min |
| Jun 29, 6:40 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Gem, Owyhee, Payette | 65 min |
| Jun 29, 7:11 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 49 min |
| Jun 29, 7:13 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore, Owyhee | 47 min |
| Jun 29, 7:18 PM MDT | Severe Thunderstorm Warning | BOI | Washington | 42 min |
| Jun 29, 7:19 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson | 41 min |
| Jun 29, 7:55 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Fremont, Jefferson, Madison, Teton | 52 min |
| Jun 29, 7:57 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Gem, Valley, Washington | 63 min |
| Jun 29, 8:49 PM MDT | Severe Thunderstorm Warning | BOI | Valley | 41 min |
| Jun 29, 10:49 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 22 min |
| Jun 30, 5:11 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Caribou, Franklin | 49 min |
| Jun 30, 6:26 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Jefferson | 49 min |
| Jun 30, 6:40 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 33 min |
| Jun 30, 7:01 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson | 44 min |
| Jul 21, 4:40 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Teton | 65 min |
| Jul 22, 3:32 PM MDT | Severe Thunderstorm Warning | OTX | Boundary | 58 min |
| Jul 22, 4:04 PM MDT | Severe Thunderstorm Warning | OTX | Bonner | 55 min |
| Jul 27, 5:27 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 48 min |
| Jul 27, 6:17 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 43 min |
| Jul 27, 6:18 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 13 min |
| Jul 28, 2:05 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Jerome, Owyhee, Twin Falls | 40 min |
| Jul 28, 2:35 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 21 min |
| Jul 28, 3:49 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Custer | 25 min |
| Jul 28, 5:13 PM MDT | Severe Thunderstorm Warning | PIH | Lincoln, Minidoka | 47 min |
| Jul 28, 5:58 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Minidoka, Power | 47 min |
| Jul 28, 6:35 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 40 min |
| Jul 28, 6:54 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 36 min |
| Jul 28, 7:14 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville | 46 min |
| Jul 29, 3:30 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 45 min |
| Jul 29, 5:58 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 47 min |
| Jul 30, 2:48 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 27 min |
| Jul 30, 3:38 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Butte, Jefferson | 52 min |
| Jul 30, 4:04 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Minidoka | 29 min |
| Jul 30, 4:23 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Butte, Jefferson | 35 min |
| Jul 30, 4:57 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 48 min |
| Jul 30, 5:33 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 42 min |
| Jul 30, 6:03 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 27 min |
| Jul 30, 6:09 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson | 51 min |
| Jul 30, 6:34 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 41 min |
| Jul 31, 1:18 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Teton | 27 min |
| Jul 31, 2:33 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 27 min |
| Jul 31, 2:50 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou | 40 min |
| Jul 31, 3:30 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 30 min |
| Jul 31, 4:13 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 32 min |
| Jul 31, 4:24 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 41 min |
| Jul 31, 4:28 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 47 min |
| Jul 31, 4:54 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 36 min |
| Jul 31, 5:15 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 34 min |
| Jul 31, 5:25 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 50 min |
| Jul 31, 6:10 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 50 min |
| Jul 31, 6:38 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 37 min |
| Jul 31, 6:58 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 32 min |
| Aug 3, 4:47 AM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Oneida, Power | 28 min |
| Aug 3, 5:12 AM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou | 33 min |
| Aug 5, 2:14 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 46 min |
| Aug 5, 3:33 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 42 min |
| Aug 5, 3:37 PM MDT | Severe Thunderstorm Warning | PIH | Custer | 38 min |
| Aug 5, 3:41 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 49 min |
| Aug 5, 4:02 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 20 min |
| Aug 5, 4:15 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Minidoka | 45 min |
| Aug 5, 6:36 PM MDT | Severe Thunderstorm Warning | BOI | Boise, Valley | 54 min |
| Aug 5, 7:51 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 39 min |
| Aug 5, 8:17 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 28 min |
| Aug 5, 8:29 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 51 min |
| Aug 6, 3:21 PM MDT | Severe Thunderstorm Warning | OTX | Nez Perce | 39 min |
| Aug 6, 3:45 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 18 min |
| Aug 6, 3:53 PM MDT | Severe Thunderstorm Warning | OTX | Nez Perce | 35 min |
| Aug 6, 4:14 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou, Jefferson | 61 min |
| Aug 6, 5:13 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Butte, Clark, Fremont, Jefferson, Madison and 1 more | 47 min |
| Aug 6, 5:35 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 55 min |
| Aug 6, 5:48 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 57 min |
| Aug 6, 5:59 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Butte, Clark, Fremont, Jefferson, Madison and 1 more | 61 min |
| Aug 8, 6:53 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 52 min |
| Aug 8, 7:42 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore, Owyhee | 48 min |
| Aug 9, 5:06 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Washington | 39 min |
| Aug 9, 5:42 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Washington | 48 min |
| Aug 9, 5:59 PM MDT | Severe Thunderstorm Warning | BOI | Elmore, Gooding | 46 min |
| Aug 9, 6:25 PM MDT | Severe Thunderstorm Warning | BOI | Adams, Valley | 50 min |
| Aug 9, 9:33 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Elmore | 27 min |
| Aug 10, 4:11 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 49 min |
| Aug 10, 4:58 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 42 min |
| Aug 10, 9:45 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 45 min |
| Aug 21, 8:56 PM MDT | Severe Thunderstorm Warning | BOI | Ada | 49 min |
| Aug 21, 9:41 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Owyhee | 64 min |
| Aug 21, 9:59 PM MDT | Severe Thunderstorm Warning | BOI | Boise | 61 min |
| Aug 22, 4:42 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 48 min |
| Aug 22, 5:06 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Fremont, Jefferson, Madison, Teton | 39 min |
| Aug 28, 12:39 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou | 51 min |
| Aug 28, 1:08 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 37 min |
| Aug 28, 1:39 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Jefferson, Madison | 36 min |
| Nov 16, 2:31 AM MST | Severe Thunderstorm Warning | OTX | Latah, Lewis, Nez Perce | 44 min |
| Nov 16, 2:48 AM MST | Severe Thunderstorm Warning | OTX | Benewah, Kootenai | 42 min |
| Nov 16, 3:04 AM MST | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 52 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bingham County19
- Bonneville County17
- Bannock County16
- Idaho County16
- Power County13
- Jefferson County13
- Owyhee County12
- Ada County11
- Canyon County11
- Caribou County10
- Washington County8
- Teton County8
- Fremont County8
- Elmore County7
- Valley County7
- Twin Falls County7
- Adams County7
- Minidoka County7
- Madison County7
- Clark County7
- Cassia County7
- Boise County6
- Jerome County6
- Oneida County6
- Butte County6
- Nez Perce County6
- Blaine County5
- Custer County5
- Lewis County5
- Gem County4
- Payette County4
- Bear Lake County4
- Clearwater County3
- Lincoln County2
- Latah County2
- Franklin County2
- Gooding County2
- Boundary County1
- Bonner County1
- Lemhi County1
2 more counties
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20092011
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.