Flash Flood Warnings in Idaho
664 flash flood warnings since 1986. 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Flash Flood Warnings
- 664
- Busiest year
- 201478 flash flood warnings
- Average year
- 18over 36 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bannock County90
- Power County67
- Blaine County67
- Cassia County67
- Boise County57
- Elmore County55
- Owyhee County45
- Oneida County37
- Caribou County32
- Bingham County32
- Custer County31
- Lemhi County25
- Ada County23
- Bonneville County22
- Camas County21
- Butte County18
- Gem County18
- Valley County18
- Washington County17
- Madison County17
- Idaho County16
- Shoshone County16
- Nez Perce County16
- Teton County15
- Franklin County14
- Latah County14
- Canyon County13
- Benewah County13
- Twin Falls County13
- Clark County12
- Bonner County12
- Jefferson County11
- Lewis County10
- Fremont County10
- Kootenai County9
- Adams County8
- Clearwater County7
- Payette County7
- Boundary County6
- Minidoka County5
The latest flash flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 5:47 PM MDT | Flash Flood Warning | BOI | Boise | 118 min |
| Sep 18, 5:21 PM MDT | Flash Flood Warning | BOI | Boise | 2 hr |
| Sep 18, 1:37 PM MDT | Flash Flood Warning | PIH | Blaine, Butte, Custer | 3 hr |
| Sep 18, 11:49 AM MDT | Flash Flood Warning | BOI | Elmore | 2 hr |
| Sep 18, 10:44 AM MDT | Flash Flood Warning | PIH | Jefferson, Madison | 89 min |
| Sep 18, 9:08 AM MDT | Flash Flood Warning | PIH | Blaine | 5 hr |
| Sep 17, 10:25 PM MDT | Flash Flood Warning | PIH | Jefferson, Madison | 4 hr |
| Sep 17, 10:00 PM MDT | Flash Flood Warning | PIH | Bonneville, Jefferson | 4 hr |
| Sep 17, 9:51 PM MDT | Flash Flood Warning | PIH | Madison | 5 hr |
| Sep 17, 10:04 AM MDT | Flash Flood Warning | PIH | Jefferson, Madison | 3 hr |
| Aug 22, 8:07 PM MDT | Flash Flood Warning | PIH | Jefferson, Madison | 3 hr |
| Aug 15, 9:39 PM MDT | Flash Flood Warning | PIH | Bingham, Blaine, Butte, Power | 80 min |
Nearby
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. Rebuilt daily.