Alert archive / Idaho / Jerome County

Weather alerts in Jerome County, Idaho, 2026

78 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jerome County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Alerts
78
Warnings
25
Watches
11
Advisories
20
Busiest month
July17 alerts
Busiest day
August 21, 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.

Jerome County, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings20100%10%
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 9, 1:27 PM MSTAir Stagnation AdvisoryBOI15 days
Jan 15, 2:14 PM MSTDense Fog AdvisoryBOI21 hr
Jan 18, 12:07 AM MSTDense Fog AdvisoryBOI13 hr
Jan 18, 4:14 PM MSTDense Fog AdvisoryBOI19 hr
Jan 31, 1:35 AM MSTAir Stagnation AdvisoryBOI7 days
Feb 6, 2:13 AM MSTAir Stagnation AdvisoryBOI55 hr
Feb 16, 10:48 AM MSTWind AdvisoryBOI18 hr
Mar 4, 1:23 AM MSTWind AdvisoryBOI43 hr
Mar 11, 2:44 AM MDTWind AdvisoryBOI40 hr
Mar 12, 2:32 AM MDTHigh Wind WatchBOI35 hr
Mar 13, 1:48 PM MDTHigh Wind WarningBOI31 hr
Mar 31, 1:44 PM MDTWind AdvisoryBOI55 hr
Apr 2, 1:09 AM MDTSpecial Weather StatementBOI51 min
Apr 12, 12:28 PM MDTSpecial Weather StatementBOI47 min
Apr 12, 12:40 PM MDTMesoscale DiscussionSPC2 hr
Apr 15, 2:23 AM MDTFreeze WatchBOI10 hr
Apr 15, 12:43 PM MDTFreeze WarningBOI21 hr
Apr 15, 12:43 PM MDTFreeze WarningBOI45 hr
Apr 16, 9:36 PM MDTFreeze WarningBOI35 hr
Apr 23, 9:54 PM MDTFreeze WatchBOI13 hr
Apr 24, 10:24 AM MDTFreeze WarningBOI23 hr
May 11, 12:11 PM MDTWind AdvisoryBOI58 hr
May 17, 1:31 AM MDTFreeze WarningBOI30 hr
May 18, 1:44 PM MDTFrost AdvisoryBOI18 hr
May 18, 7:22 PM MDTSpecial Weather StatementBOI38 min
Jun 2, 12:52 PM MDTRed Flag WarningBOI32 hr
Jun 5, 1:15 PM MDTFire Weather WatchPIH23 hr
Jun 5, 1:44 PM MDTFire Weather WatchBOI23 hr
Jun 6, 12:29 PM MDTRed Flag WarningPIH33 hr
Jun 6, 12:31 PM MDTRed Flag WarningBOI31 hr
Jun 10, 12:58 AM MDTWind AdvisoryBOI18 hr
Jun 14, 12:46 PM MDTFire Weather WatchBOI24 hr
Jun 15, 12:26 PM MDTRed Flag WarningBOI33 hr
Jun 15, 1:36 PM MDTRed Flag WarningPIH31 hr
Jun 16, 1:11 PM MDTRed Flag WarningBOI32 hr
Jun 16, 8:41 PM MDTRed Flag WarningPIH24 hr
Jun 21, 12:53 PM MDTRed Flag WarningPIH32 hr
Jun 25, 8:24 AM MDTFire Weather WatchBOI4 hr
Jun 25, 12:53 PM MDTRed Flag WarningBOI33 hr
Jun 26, 10:09 PM MDTSpecial Weather StatementBOI36 min
Jul 1, 5:26 PM MDTSpecial Weather StatementBOI49 min
Jul 7, 2:29 PM MDTRed Flag WarningBOI30 hr
Jul 8, 1:59 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 2:57 PM MDTSpecial Weather StatementBOI33 min
Jul 8, 6:07 PM MDTSpecial Weather StatementBOI38 min
Jul 8, 6:48 PM MDTSpecial Weather StatementBOI42 min
Jul 9, 12:56 PM MDTHeat AdvisoryBOI56 hr
Jul 11, 8:55 PM MDTHeat AdvisoryBOI48 hr
Jul 15, 1:14 PM MDTRed Flag WarningBOI32 hr
Jul 19, 12:16 AM MDTHeat AdvisoryBOI45 hr
Jul 22, 1:17 PM MDTHeat AdvisoryBOI3 days
Jul 24, 1:02 PM MDTMesoscale DiscussionSPC118 min
Jul 25, 2:52 PM MDTMesoscale DiscussionSPC113 min
Jul 29, 2:14 PM MDTMesoscale DiscussionSPC61 min
Jul 29, 4:54 PM MDTSpecial Weather StatementBOI51 min
Jul 30, 12:11 PM MDTFire Weather WatchPIH24 hr
Jul 31, 12:29 PM MDTRed Flag WarningPIH57 hr
Aug 5, 12:00 PM MDTHeat AdvisoryBOI3 days
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 19, 2:17 AM MDTHeat AdvisoryBOI67 hr
Aug 21, 12:41 PM MDTRed Flag WarningPIH32 hr
Aug 21, 12:48 PM MDTWind AdvisoryBOI8 hr
Aug 21, 2:35 PM MDTMesoscale DiscussionSPC2 hr
Aug 21, 5:20 PM MDTRed Flag WarningBOI31 hr
Aug 22, 2:49 PM MDTMesoscale DiscussionSPC116 min
Aug 22, 4:35 PM MDTSpecial Weather StatementBOI25 min
Aug 24, 1:03 PM MDTMesoscale DiscussionSPC117 min
Aug 24, 6:13 PM MDTSpecial Weather StatementBOI62 min
Sep 1, 4:24 PM MDTSevere Thunderstorm WarningBOI21 min
Sep 1, 4:44 PM MDTSpecial Weather StatementBOI46 min
Sep 1, 5:52 PM MDTSpecial Weather StatementBOI38 min
Sep 16, 11:43 PM MDTSpecial Weather StatementBOI47 min
Sep 17, 12:43 AM MDTSevere Thunderstorm WarningBOI47 min
Sep 17, 1:42 PM MDTFire Weather WatchBOI18 hr
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.