Alert archive / Idaho / Ada County

Weather alerts in Ada County, Idaho, 2025

83 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Ada County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts
83
Warnings
9
Watches
4
Advisories
30
Busiest month
July25 alerts
Busiest day
July 4, 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.

Ada County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings40100%50%
Flash flood warnings110%425%72 min

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boise, ID: severe thunderstorm warnings39587%6219%24 min
NWS Boise, ID: flash flood warnings11464%2030%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.

IssuedProductOfficeLasted
Jan 6, 6:55 AM MSTDense Fog AdvisoryBOI4 hr
Jan 6, 12:58 PM MSTAir Stagnation AdvisoryBOI4 days
Jan 13, 1:24 PM MSTAir Stagnation AdvisoryBOI4 days
Jan 25, 10:27 AM MSTAir Stagnation AdvisoryBOI6 days
Feb 1, 1:47 PM MSTWinter Weather AdvisoryBOI4 days
Feb 6, 2:53 AM MSTWinter Weather AdvisoryBOI35 hr
Feb 8, 2:07 PM MSTCold Weather AdvisoryBOI5 days
Feb 11, 1:37 PM MSTWinter Storm WatchBOI14 hr
Feb 12, 4:04 AM MSTWinter Storm WarningBOI55 hr
Mar 2, 2:22 AM MSTWind AdvisoryBOI42 hr
Mar 5, 1:09 PM MSTWind AdvisoryBOI34 hr
Mar 15, 2:55 AM MDTWind AdvisoryBOI45 hr
Mar 17, 1:33 PM MDTWind AdvisoryBOI31 hr
Mar 31, 11:36 AM MDTSpecial Weather StatementBOI39 min
Apr 16, 12:40 PM MDTWind AdvisoryBOI32 hr
May 3, 2:12 PM MDTWind AdvisoryBOI30 hr
May 3, 6:00 PM MDTSpecial Weather StatementBOI45 min
May 17, 1:44 AM MDTWind AdvisoryBOI43 hr
May 18, 1:27 PM MDTFrost AdvisoryBOI19 hr
May 29, 12:39 PM MDTHeat AdvisoryBOI54 hr
Jun 10, 8:26 PM MDTSpecial Weather StatementBOI49 min
Jun 11, 9:29 AM MDTSpecial Weather StatementBOI46 min
Jun 11, 11:43 AM MDTSpecial Weather StatementBOI32 min
Jun 11, 12:17 PM MDTSpecial Weather StatementBOI43 min
Jun 19, 9:54 PM MDTSpecial Weather StatementBOI51 min
Jun 28, 2:03 PM MDTHeat AdvisoryBOI3 days
Jul 2, 4:27 PM MDTSpecial Weather StatementBOI33 min
Jul 2, 5:06 PM MDTSpecial Weather StatementBOI39 min
Jul 2, 5:38 PM MDTSpecial Weather StatementBOI52 min
Jul 2, 7:27 PM MDTSpecial Weather StatementBOI48 min
Jul 3, 9:10 PM MDTSpecial Weather StatementBOI50 min
Jul 4, 12:07 PM MDTMesoscale DiscussionSPC113 min
Jul 4, 12:19 PM MDTSpecial Weather StatementBOI41 min
Jul 4, 12:57 PM MDTSevere Thunderstorm WarningBOI33 min
Jul 4, 1:07 PM MDTSevere Thunderstorm WarningBOI38 min
Jul 4, 1:38 PM MDTSpecial Weather StatementBOI52 min
Jul 7, 1:23 PM MDTHeat AdvisoryBOI32 hr
Jul 8, 12:49 PM MDTRed Flag WarningBOI34 hr
Jul 9, 6:16 PM MDTSpecial Weather StatementBOI44 min
Jul 9, 6:17 PM MDTSpecial Weather StatementBOI43 min
Jul 9, 6:28 PM MDTSpecial Weather StatementBOI47 min
Jul 9, 7:05 PM MDTSpecial Weather StatementBOI40 min
Jul 9, 7:20 PM MDTSevere Thunderstorm WarningBOI40 min
Jul 9, 8:58 PM MDTSpecial Weather StatementBOI32 min
Jul 22, 5:56 PM MDTSpecial Weather StatementBOI49 min
Jul 26, 6:11 PM MDTSevere Thunderstorm WarningBOI64 min
Jul 26, 8:30 PM MDTSpecial Weather StatementBOI30 min
Jul 26, 8:46 PM MDTSpecial Weather StatementBOI44 min
Jul 30, 2:26 PM MDTRed Flag WarningBOI34 hr
Jul 31, 2:34 PM MDTMesoscale DiscussionSPC56 min
Jul 31, 5:59 PM MDTSpecial Weather StatementBOI31 min
Aug 2, 12:44 AM MDTSpecial Weather StatementBOI31 min
Aug 3, 8:57 PM MDTSpecial Weather StatementBOI48 min
Aug 11, 1:05 PM MDTHeat AdvisoryBOI56 hr
Aug 25, 11:41 AM MDTFlash Flood WatchBOI58 hr
Aug 26, 5:53 PM MDTSpecial Weather StatementBOI37 min
Aug 26, 6:33 PM MDTFlash Flood WarningBOI3 hr
Aug 26, 6:46 PM MDTSpecial Weather StatementBOI44 min
Aug 26, 7:35 PM MDTSpecial Weather StatementBOI40 min
Aug 27, 4:10 AM MDTAreal Flood AdvisoryBOI3 hr
Aug 27, 8:21 PM MDTSpecial Weather StatementBOI24 min
Sep 10, 6:33 PM MDTSpecial Weather StatementBOI42 min
Sep 10, 6:59 PM MDTSpecial Weather StatementBOI46 min
Sep 10, 7:41 PM MDTSpecial Weather StatementBOI49 min
Sep 14, 2:10 PM MDTMesoscale DiscussionSPC2 hr
Sep 21, 5:20 PM MDTSpecial Weather StatementBOI25 min
Sep 29, 8:06 PM MDTSpecial Weather StatementBOI24 min
Sep 29, 8:37 PM MDTSpecial Weather StatementBOI53 min
Sep 30, 3:23 PM MDTSpecial Weather StatementBOI52 min
Oct 6, 1:20 PM MDTFrost AdvisoryBOI20 hr
Oct 16, 2:05 PM MDTFrost AdvisoryBOI43 hr
Oct 20, 2:28 AM MDTFreeze WatchBOI11 hr
Oct 20, 1:06 PM MDTFreeze WarningBOI21 hr
Oct 25, 6:17 PM MDTSpecial Weather StatementBOI58 min
Nov 20, 10:00 PM MSTDense Fog AdvisoryBOI12 hr
Nov 21, 1:07 PM MSTDense Fog AdvisoryBOI21 hr
Nov 23, 1:14 AM MSTDense Fog AdvisoryBOI9 hr
Nov 27, 3:13 AM MSTDense Fog AdvisoryBOI8 hr
Nov 27, 10:05 PM MSTDense Fog AdvisoryBOI11 hr
Dec 10, 1:30 PM MSTAir Stagnation AdvisoryBOI6 days
Dec 15, 1:52 PM MSTHigh Wind WatchBOI7 hr
Dec 15, 8:23 PM MSTWind AdvisoryBOI45 hr
Dec 27, 12:56 PM MSTAir Stagnation AdvisoryBOI4 days

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 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.