Alert archive / Idaho / Valley County
Weather alerts in Valley County, Idaho, 2025
51 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Valley County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 51
- Warnings
- 7
- Watches
- 10
- Advisories
- 18
- Busiest month
- August11 alerts
- Busiest day
- July 31, 20256 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Valley County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 6 | 17% | 2 min |
| Flash flood warnings | 0 | 2 | 0% |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: severe thunderstorm warnings | 39 | 5 | 87% | 62 | 19% | 24 min |
| NWS Boise, ID: flash flood warnings | 11 | 4 | 64% | 20 | 30% | 30 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 | Lasted |
|---|---|---|---|
| Jan 6, 12:58 PM MST | Air Stagnation Advisory | BOI | 4 days |
| Jan 13, 1:24 PM MST | Air Stagnation Advisory | BOI | 4 days |
| Jan 25, 10:27 AM MST | Air Stagnation Advisory | BOI | 6 days |
| Jan 29, 1:00 PM MST | Winter Storm Watch | BOI | 24 hr |
| Jan 30, 1:22 PM MST | Winter Weather Advisory | BOI | 48 hr |
| Feb 1, 1:47 PM MST | Winter Storm Warning | BOI | 51 hr |
| Feb 1, 1:47 PM MST | Winter Weather Advisory | BOI | 4 days |
| Feb 6, 2:53 AM MST | Winter Weather Advisory | BOI | 35 hr |
| Feb 8, 2:07 PM MST | Cold Weather Advisory | BOI | 5 days |
| Feb 12, 4:04 AM MST | Winter Weather Advisory | BOI | 55 hr |
| Feb 15, 1:36 PM MST | Winter Weather Advisory | BOI | 24 hr |
| Mar 15, 3:09 AM MDT | Winter Weather Advisory | BOI | 33 hr |
| Mar 16, 5:46 PM MDT | Winter Weather Advisory | BOI | 12 hr |
| Mar 21, 1:36 PM MDT | Winter Weather Advisory | BOI | 14 hr |
| May 3, 9:47 PM MDT | Special Weather Statement | BOI | 28 min |
| Jun 10, 11:38 AM MDT | Flood Watch | BOI | 28 hr |
| Jun 11, 10:36 AM MDT | Special Weather Statement | BOI | 39 min |
| Jun 11, 1:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 3, 4:49 PM MDT | Flash Flood Watch | BOI | 28 hr |
| Jul 9, 8:52 PM MDT | Areal Flood Advisory | BOI | 3 hr |
| Jul 26, 10:02 PM MDT | Special Weather Statement | BOI | 58 min |
| Jul 31, 9:38 AM MDT | Flash Flood Watch | BOI | 12 hr |
| Jul 31, 2:33 PM MDT | Special Weather Statement | BOI | 27 min |
| Jul 31, 2:34 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 31, 3:00 PM MDT | Special Weather Statement | BOI | 45 min |
| Jul 31, 3:33 PM MDT | Special Weather Statement | BOI | 42 min |
| Jul 31, 4:16 PM MDT | Special Weather Statement | BOI | 29 min |
| Aug 3, 4:12 PM MDT | Special Weather Statement | BOI | 48 min |
| Aug 3, 10:24 PM MDT | Special Weather Statement | BOI | 51 min |
| Aug 4, 7:39 PM MDT | Special Weather Statement | BOI | 51 min |
| Aug 7, 4:09 PM MDT | Special Weather Statement | BOI | 36 min |
| Aug 12, 11:56 AM MDT | Red Flag Warning | PIH | 33 hr |
| Aug 13, 10:04 PM MDT | Red Flag Warning | PIH | 23 hr |
| Aug 15, 1:52 PM MDT | Flash Flood Watch | BOI | 34 hr |
| Aug 15, 8:56 PM MDT | Red Flag Warning | PIH | 24 hr |
| Aug 16, 9:04 PM MDT | Red Flag Warning | PIH | 24 hr |
| Aug 17, 2:41 AM MDT | Flash Flood Watch | BOI | 24 hr |
| Aug 25, 11:41 AM MDT | Flash Flood Watch | BOI | 58 hr |
| Sep 11, 12:59 PM MDT | Flash Flood Watch | BOI | 8 hr |
| Sep 11, 3:31 PM MDT | Special Weather Statement | BOI | 44 min |
| Sep 14, 2:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 1, 2:44 PM MDT | Flash Flood Watch | BOI | 43 hr |
| Oct 25, 5:43 PM MDT | Special Weather Statement | BOI | 47 min |
| Dec 4, 1:41 PM MST | Winter Weather Advisory | BOI | 33 hr |
| Dec 10, 1:30 PM MST | Air Stagnation Advisory | BOI | 6 days |
| Dec 15, 8:23 PM MST | Wind Advisory | BOI | 45 hr |
| Dec 16, 12:48 PM MST | Winter Storm Watch | BOI | 24 hr |
| Dec 17, 7:28 AM MST | Severe Thunderstorm Warning | BOI | 47 min |
| Dec 17, 8:09 AM MST | Severe Thunderstorm Warning | BOI | 21 min |
| Dec 25, 1:42 AM MST | Winter Weather Advisory | BOI | 51 hr |
| Dec 27, 12:56 PM MST | Air Stagnation Advisory | BOI | 4 days |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 2 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 13 |
| Flooding | |
| Flash Flood Watch | 7 |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 10 |
| Cold | |
| Cold Weather Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 4 |
| Fog and smoke | |
| Air Stagnation Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.