Alert archive / Idaho / Valley County

Weather alerts in Valley County, Idaho, 2026

54 weather alerts in 2026, 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 2026. Tap one for its archive.

Alerts
54
Warnings
20
Watches
12
Advisories
5
Busiest month
July16 alerts
Busiest day
May 25, 20264 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, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5340%4100%27 min
Flash flood warnings00

Each office's whole area, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boise, ID: severe thunderstorm warnings461078%4360%23 min
NWS Boise, ID: flash flood warnings13192%367%69 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

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.

IssuedProductOfficeLasted
Jan 5, 2:00 AM MSTWinter Weather AdvisoryBOI3 days
Jan 9, 1:27 PM MSTAir Stagnation AdvisoryBOI15 days
Feb 16, 2:24 AM MSTWinter Weather AdvisoryBOI30 hr
Mar 12, 2:32 AM MDTHigh Wind WatchBOI35 hr
Mar 13, 1:48 PM MDTWind AdvisoryBOI31 hr
Apr 2, 12:59 AM MDTWinter Weather AdvisoryBOI17 hr
May 25, 4:44 PM MDTSevere Thunderstorm WarningBOI46 min
May 25, 5:01 PM MDTSpecial Weather StatementBOI44 min
May 25, 5:28 PM MDTSevere Thunderstorm WarningBOI47 min
May 25, 5:46 PM MDTMesoscale DiscussionSPC119 min
May 25, 6:11 PM MDTSevere Thunderstorm WarningBOI34 min
May 25, 6:47 PM MDTSpecial Weather StatementBOI43 min
May 27, 2:50 PM MDTMesoscale DiscussionSPC85 min
May 27, 3:19 PM MDTSevere Thunderstorm WarningBOI41 min
May 28, 4:09 PM MDTSevere Thunderstorm Warning Considerable damage threatBOI44 min
Jun 18, 1:22 PM MDTFire Weather WatchPIH23 hr
Jun 19, 12:38 PM MDTRed Flag WarningPIH32 hr
Jun 27, 10:42 PM MDTFlood WatchBOI13 hr
Jul 10, 11:46 AM MDTRed Flag WarningPIH33 hr
Jul 16, 11:08 AM MDTRed Flag WarningPIH34 hr
Jul 16, 8:17 PM MDTSpecial Weather StatementBOI43 min
Jul 16, 9:07 PM MDTSpecial Weather StatementBOI53 min
Jul 17, 5:04 PM MDTSpecial Weather StatementBOI41 min
Jul 17, 7:06 PM MDTSpecial Weather StatementBOI39 min
Jul 18, 9:37 AM MDTSpecial Weather StatementBOI38 min
Jul 18, 10:12 AM MDTSpecial Weather StatementBOI48 min
Jul 18, 10:29 AM MDTSpecial Weather StatementPIH31 min
Jul 22, 2:51 PM MDTFire Weather WatchBOI23 hr
Jul 23, 2:12 PM MDTRed Flag WarningBOI55 hr
Jul 26, 10:58 AM MDTRed Flag WarningPIH33 hr
Jul 30, 8:13 AM MDTFire Weather WatchBOI28 hr
Jul 30, 12:11 PM MDTFire Weather WatchPIH24 hr
Jul 31, 12:29 PM MDTRed Flag WarningPIH57 hr
Jul 31, 12:39 PM MDTRed Flag WarningBOI32 hr
Aug 7, 12:33 PM MDTRed Flag WarningPIH32 hr
Aug 8, 9:05 PM MDTRed Flag WarningPIH24 hr
Aug 9, 9:37 PM MDTRed Flag WarningPIH23 hr
Aug 11, 1:27 PM MDTFire Weather WatchBOI24 hr
Aug 12, 1:20 PM MDTRed Flag WarningBOI3 days
Aug 12, 1:30 PM MDTRed Flag WarningPIH32 hr
Aug 13, 9:11 AM MDTFlash Flood WatchBOI60 hr
Aug 15, 2:50 PM MDTSpecial Weather StatementBOI25 min
Aug 15, 6:01 PM MDTSpecial Weather StatementBOI44 min
Aug 15, 7:07 PM MDTSpecial Weather StatementBOI38 min
Aug 15, 7:37 PM MDTSpecial Weather StatementBOI53 min
Aug 15, 8:16 PM MDTSpecial Weather StatementMSO29 min
Aug 21, 12:41 PM MDTRed Flag WarningPIH32 hr
Aug 21, 5:20 PM MDTRed Flag WarningBOI31 hr
Sep 2, 2:03 PM MDTFlash Flood WatchBOI53 hr
Sep 16, 10:40 AM MDTFire Weather WatchBOI18 hr
Sep 17, 4:31 AM MDTRed Flag WarningBOI16 hr
Sep 17, 1:42 PM MDTFire Weather WatchBOI18 hr
Sep 17, 2:09 PM MDTSpecial Weather StatementBOI51 min
Sep 18, 10:50 AM MDTFlash Flood WatchBOI13 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive2025

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.