Alert archive / Idaho / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Idaho, 2015
127 severe thunderstorm warnings in 2015. 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 2015. Tap one for its archive.
- Severe Thunderstorm Warnings
- 127
- Busiest month
- June54 severe thunderstorm warnings
- Busiest day
- June 1, 201526 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.
33 of 127 severe thunderstorm warnings covering Idaho in 2015 had a qualifying storm report inside them; 47 of 91 hail, wind and damage reports fell inside a warning, on average 19 minutes after it went out.
Idaho, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 127 | 33 | 74% | 91 | 52% | 19 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 19 | 8 | 58% | 18 | 67% | 14 min |
| NWS Spokane, WA: severe thunderstorm warnings | 21 | 5 | 76% | 31 | 42% | 32 min |
| NWS Pocatello, ID: severe thunderstorm warnings | 95 | 26 | 73% | 66 | 58% | 19 min |
| NWS Boise, ID: severe thunderstorm warnings | 22 | 5 | 77% | 15 | 40% | 19 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, 3:43 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 47 min |
| May 23, 5:21 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Butte, Lincoln, Minidoka | 39 min |
| May 24, 5:40 PM MDT | Severe Thunderstorm Warning | BOI | Camas, Elmore, Gooding | 48 min |
| May 25, 3:02 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon | 43 min |
| May 26, 9:46 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon | 44 min |
| May 27, 1:56 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson | 23 min |
| May 27, 2:03 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 42 min |
| May 27, 3:02 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Jefferson, Madison | 25 min |
| May 27, 3:24 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 51 min |
| May 29, 9:31 PM MDT | Severe Thunderstorm Warning | OTX | Kootenai | 44 min |
| May 30, 4:53 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 37 min |
| May 30, 5:13 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 47 min |
| May 30, 5:20 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 40 min |
| May 30, 5:44 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 46 min |
| May 30, 5:56 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 34 min |
| May 30, 6:17 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 58 min |
| May 30, 6:50 PM MDT | Severe Thunderstorm Warning | PIH | Teton | 24 min |
| May 30, 10:08 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Boundary | 52 min |
| May 31, 5:48 PM MDT | Severe Thunderstorm Warning | PIH | Clark | 27 min |
| May 31, 5:51 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 39 min |
| May 31, 5:57 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Lincoln, Minidoka | 63 min |
| May 31, 6:08 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Minidoka, Power | 37 min |
| May 31, 6:17 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 42 min |
| May 31, 6:46 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 44 min |
| May 31, 9:04 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Fremont, Jefferson, Madison, Teton | 41 min |
| May 31, 9:39 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Fremont, Jefferson, Madison, Teton | 36 min |
| May 31, 9:41 PM MDT | Severe Thunderstorm Warning | OTX | Lewis | 49 min |
| May 31, 10:11 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Fremont, Jefferson, Madison, Teton | 34 min |
| May 31, 10:33 PM MDT | Severe Thunderstorm Warning | OTX | Nez Perce | 57 min |
| May 31, 11:33 PM MDT | Severe Thunderstorm Warning | OTX | Nez Perce | 42 min |
| Jun 1, 1:08 PM MDT | Severe Thunderstorm Warning | BOI | Gooding, Jerome, Twin Falls | 48 min |
| Jun 1, 1:32 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 33 min |
| Jun 1, 1:56 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Power | 49 min |
| Jun 1, 2:23 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Butte, Jefferson | 52 min |
| Jun 1, 2:31 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark | 29 min |
| Jun 1, 2:36 PM MDT | Severe Thunderstorm Warning | MSO | Lemhi | 24 min |
| Jun 1, 3:05 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 40 min |
| Jun 1, 3:21 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 39 min |
| Jun 1, 3:50 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 40 min |
| Jun 1, 3:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 47 min |
| Jun 1, 4:10 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 37 min |
| Jun 1, 4:35 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Franklin, Oneida | 40 min |
| Jun 1, 4:39 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Jefferson, Madison | 35 min |
| Jun 1, 5:13 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou, Franklin, Oneida | 35 min |
| Jun 1, 5:13 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Fremont, Madison, Teton | 47 min |
| Jun 1, 5:46 PM MDT | Severe Thunderstorm Warning | PIH | Fremont | 24 min |
| Jun 1, 5:47 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Caribou, Franklin | 43 min |
| Jun 1, 6:33 PM MDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 42 min |
| Jun 1, 6:54 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 36 min |
| Jun 1, 7:12 PM MDT | Severe Thunderstorm Warning | OTX | Latah, Nez Perce | 44 min |
| Jun 3, 6:21 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 39 min |
| Jun 3, 7:59 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 46 min |
| Jun 9, 4:51 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville | 39 min |
| Jun 10, 3:50 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 40 min |
| Jun 10, 4:54 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida | 36 min |
| Jun 15, 2:50 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou | 55 min |
| Jun 15, 3:40 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 50 min |
| Jun 15, 3:54 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Jefferson, Madison | 27 min |
| Jun 15, 4:19 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Jefferson, Madison, Teton | 56 min |
| Jun 15, 4:22 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida | 38 min |
| Jun 15, 5:01 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Cassia, Power | 44 min |
| Jun 15, 5:25 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 35 min |
| Jun 15, 5:45 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Caribou, Power | 60 min |
| Jun 15, 5:58 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Cassia, Power | 47 min |
| Jun 15, 6:42 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 48 min |
| Jun 15, 6:46 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou | 59 min |
| Jun 15, 7:09 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin, Oneida | 54 min |
| Jun 15, 7:27 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 16 min |
| Jun 15, 7:40 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Caribou | 20 min |
| Jun 15, 7:54 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 51 min |
| Jun 15, 8:00 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Bonneville, Caribou, Franklin | 45 min |
| Jun 28, 6:08 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Elmore | 37 min |
| Jun 29, 7:07 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 23 min |
| Jun 30, 2:54 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 51 min |
| Jun 30, 3:41 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 30 min |
| Jun 30, 7:36 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 39 min |
| Jul 6, 1:34 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 45 min |
| Jul 14, 2:59 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 46 min |
| Jul 14, 5:35 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 25 min |
| Jul 14, 5:53 PM MDT | Severe Thunderstorm Warning | BOI | Canyon, Owyhee | 37 min |
| Jul 15, 12:59 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 46 min |
| Jul 15, 1:40 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Custer | 50 min |
| Jul 15, 4:41 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 49 min |
| Jul 15, 5:28 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 30 min |
| Jul 15, 5:35 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 55 min |
| Jul 15, 5:43 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 32 min |
| Jul 15, 6:30 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Caribou, Franklin, Oneida, Power | 32 min |
| Aug 4, 3:26 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Fremont, Jefferson, Madison | 49 min |
| Aug 4, 4:29 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Fremont, Jefferson, Madison, Teton | 35 min |
| Aug 4, 4:45 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 45 min |
| Aug 4, 5:27 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Franklin, Oneida | 23 min |
| Aug 5, 1:16 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Cassia and 3 more | 44 min |
| Aug 5, 1:57 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Caribou and 2 more | 48 min |
| Aug 5, 2:42 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Butte, Caribou, Clark and 4 more | 48 min |
| Aug 5, 2:43 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 47 min |
| Aug 5, 3:19 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Oneida, Power | 41 min |
| Aug 5, 3:24 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Clark, Fremont, Jefferson, Madison, Teton | 51 min |
| Aug 10, 4:08 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Gem | 22 min |
| Aug 10, 4:11 PM MDT | Severe Thunderstorm Warning | BOI | Ada | 34 min |
| Aug 10, 4:20 PM MDT | Severe Thunderstorm Warning | BOI | Ada | 25 min |
| Aug 10, 5:00 PM MDT | Severe Thunderstorm Warning | MSO | Idaho | 60 min |
| Aug 10, 5:22 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 53 min |
| Aug 10, 6:34 PM MDT | Severe Thunderstorm Warning | MSO | Clearwater, Idaho | 26 min |
| Aug 10, 10:27 PM MDT | Severe Thunderstorm Warning | OTX | Bonner, Boundary | 48 min |
| Aug 11, 5:17 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore, Owyhee | 43 min |
| Aug 11, 5:58 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Canyon, Elmore | 24 min |
| Aug 14, 3:37 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Butte | 53 min |
| Aug 14, 4:08 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 52 min |
| Aug 14, 4:27 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Bonneville, Butte, Jefferson | 48 min |
| Aug 14, 5:23 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Minidoka, Power | 37 min |
| Aug 14, 5:37 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson, Madison, Teton | 38 min |
| Aug 14, 5:58 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Power | 47 min |
| Aug 14, 6:08 PM MDT | Severe Thunderstorm Warning | BOI | Jerome, Twin Falls | 23 min |
| Aug 14, 6:27 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Lincoln, Minidoka, Power | 33 min |
| Aug 14, 7:11 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Caribou, Clark, Fremont, Jefferson and 2 more | 49 min |
| Aug 14, 9:00 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Lincoln, Minidoka | 45 min |
| Aug 14, 9:48 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou, Power | 42 min |
| Aug 27, 3:10 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Franklin | 50 min |
| Aug 27, 4:11 PM MDT | Severe Thunderstorm Warning | PIH | Bear Lake, Franklin | 49 min |
| Aug 27, 4:58 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville, Jefferson, Madison | 47 min |
| Aug 27, 5:42 PM MDT | Severe Thunderstorm Warning | PIH | Bonneville, Teton | 16 min |
| Aug 29, 5:06 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Power | 24 min |
| Aug 29, 5:18 PM MDT | Severe Thunderstorm Warning | PIH | Bingham | 12 min |
| Aug 29, 5:31 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Bonneville | 19 min |
| Aug 29, 7:11 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Cassia, Power | 28 min |
| Dec 21, 7:46 PM MST | Severe Thunderstorm Warning | BOI | Elmore, Gooding, Jerome, Owyhee, Twin Falls | 18 min |
| Dec 21, 8:50 PM MST | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Caribou, Power | 40 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bingham County38
- Bonneville County35
- Power County26
- Bannock County25
- Jefferson County19
- Caribou County19
- Cassia County17
- Madison County15
- Blaine County14
- Fremont County14
- Butte County13
- Oneida County13
- Teton County12
- Minidoka County9
- Clark County9
- Franklin County9
- Ada County8
- Canyon County6
- Owyhee County6
- Elmore County5
- Twin Falls County5
- Nez Perce County5
- Lincoln County4
- Jerome County4
- Bear Lake County4
- Idaho County4
- Gooding County3
- Lewis County3
- Custer County3
- Bonner County2
- Boundary County2
- Clearwater County2
- Camas County1
- Kootenai County1
- Lemhi County1
- Latah County1
- Boise County1
- Gem County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20142016
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.