Alert archive / Montana / Powell County

Weather alerts in Powell County, Montana, 2025

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

Powell County and its neighbors

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

Alerts
107
Warnings
9
Watches
10
Advisories
49
Busiest month
July21 alerts
Busiest day
July 2, 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.

Powell County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10100%0
Flash flood warnings00

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings9278%1217%21 min
NWS Missoula, MT: flash flood warnings30100%80%

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 2, 1:02 PM MSTWinter Weather AdvisoryMSO46 hr
Jan 4, 12:41 PM MSTWinter Weather AdvisoryMSO40 hr
Jan 10, 8:12 AM MSTWinter Weather AdvisoryMSO42 hr
Jan 16, 10:47 AM MSTWinter Weather AdvisoryMSO48 hr
Jan 17, 12:12 PM MSTExtreme Cold WarningMSO71 hr
Jan 18, 11:10 AM MSTWinter Weather AdvisoryMSO30 hr
Jan 23, 12:25 PM MSTWinter Weather AdvisoryMSO35 hr
Jan 25, 9:43 AM MSTAir Stagnation AdvisoryMSO6 days
Jan 29, 1:01 PM MSTWinter Storm WatchMSO5 days
Jan 30, 11:43 AM MSTWinter Weather AdvisoryMSO50 hr
Feb 1, 2:30 PM MSTWinter Weather AdvisoryMSO4 days
Feb 2, 1:18 PM MSTWinter Storm WarningMSO70 hr
Feb 6, 2:20 PM MSTWinter Weather AdvisoryMSO30 hr
Feb 10, 9:50 AM MSTCold Weather AdvisoryMSO3 days
Feb 13, 12:15 PM MSTWinter Weather AdvisoryMSO47 hr
Feb 15, 1:19 PM MSTWinter Storm WatchMSO24 hr
Feb 15, 1:19 PM MSTWinter Storm WarningMSO68 hr
Feb 15, 1:19 PM MSTWinter Weather AdvisoryMSO68 hr
Feb 18, 12:24 PM MSTWinter Weather AdvisoryMSO44 hr
Feb 21, 1:17 PM MSTWinter Weather AdvisoryMSO43 hr
Feb 24, 12:54 PM MSTWinter Weather AdvisoryMSO34 hr
Mar 4, 1:22 AM MSTWinter Weather AdvisoryMSO7 hr
Mar 15, 2:03 PM MDTWinter Weather AdvisoryMSO43 hr
Mar 15, 2:03 PM MDTWinter Weather AdvisoryMSO6 min
Mar 20, 9:56 AM MDTWinter Weather AdvisoryMSO50 hr
Mar 21, 1:16 PM MDTWind AdvisoryMSO29 hr
Mar 28, 10:30 AM MDTWinter Storm WatchMSO23 hr
Mar 29, 9:33 AM MDTWinter Weather AdvisoryMSO23 hr
Mar 31, 2:47 AM MDTWinter Weather AdvisoryMSO45 hr
Apr 2, 1:24 AM MDTWinter Weather AdvisoryMSO8 hr
Apr 15, 2:33 PM MDTWinter Weather AdvisoryMSO42 hr
May 5, 2:24 AM MDTWinter Weather AdvisoryMSO7 hr
May 5, 9:18 AM MDTWinter Weather AdvisoryMSO6 hr
May 10, 1:48 PM MDTWind AdvisoryMSO7 hr
May 10, 2:26 PM MDTMesoscale DiscussionSPC2 hr
May 10, 3:07 PM MDTSpecial Weather StatementMSO38 min
May 10, 3:59 PM MDTSpecial Weather StatementMSO31 min
May 10, 5:14 PM MDTSpecial Weather StatementMSO31 min
May 11, 12:39 PM MDTMesoscale DiscussionSPC3 hr
May 16, 1:24 PM MDTWinter Storm WatchMSO24 hr
May 17, 1:13 PM MDTWinter Storm WarningMSO19 hr
May 17, 1:13 PM MDTWinter Weather AdvisoryMSO29 hr
May 29, 8:06 PM MDTSpecial Weather StatementMSO39 min
Jun 10, 12:44 PM MDTMesoscale DiscussionSPC61 min
Jun 11, 1:57 PM MDTMesoscale DiscussionSPC63 min
Jun 12, 5:37 PM MDTSpecial Weather StatementMSO23 min
Jun 19, 9:28 PM MDTSpecial Weather StatementMSO47 min
Jun 20, 12:20 AM MDTSpecial Weather StatementMSO25 min
Jun 20, 12:17 PM MDTWinter Weather AdvisoryMSO48 hr
Jun 20, 12:32 PM MDTMesoscale DiscussionSPC3 hr
Jun 26, 3:49 PM MDTSpecial Weather StatementMSO26 min
Jul 2, 2:42 PM MDTMesoscale DiscussionSPC93 min
Jul 2, 3:41 PM MDTSpecial Weather StatementMSO49 min
Jul 2, 4:42 PM MDTSpecial Weather StatementMSO33 min
Jul 2, 4:49 PM MDTSpecial Weather StatementMSO26 min
Jul 2, 5:08 PM MDTSpecial Weather StatementMSO37 min
Jul 2, 5:38 PM MDTSpecial Weather StatementMSO52 min
Jul 2, 6:09 PM MDTSpecial Weather StatementMSO51 min
Jul 4, 6:05 PM MDTSpecial Weather StatementMSO25 min
Jul 13, 12:39 PM MDTWind AdvisoryMSO49 hr
Jul 26, 3:08 PM MDTSpecial Weather StatementMSO37 min
Jul 26, 7:36 PM MDTSpecial Weather StatementMSO39 min
Jul 26, 7:40 PM MDTSpecial Weather StatementMSO50 min
Jul 27, 3:29 PM MDTSpecial Weather StatementMSO46 min
Jul 27, 4:12 PM MDTSpecial Weather StatementMSO48 min
Jul 27, 4:33 PM MDTSpecial Weather StatementMSO42 min
Jul 28, 1:02 PM MDTFlood WatchMSO32 hr
Jul 28, 5:26 PM MDTSpecial Weather StatementMSO49 min
Jul 28, 5:41 PM MDTSpecial Weather StatementMSO49 min
Jul 28, 6:17 PM MDTSpecial Weather StatementMSO43 min
Jul 30, 8:37 PM MDTAreal Flood AdvisoryMSO3 hr
Jul 31, 5:28 PM MDTSevere Thunderstorm WarningMSO32 min
Aug 7, 6:09 PM MDTSpecial Weather StatementMSO36 min
Aug 11, 12:26 PM MDTFire Weather WatchMSO25 hr
Aug 12, 12:57 PM MDTRed Flag WarningMSO33 hr
Aug 19, 8:16 PM MDTSpecial Weather StatementMSO29 min
Sep 14, 6:08 PM MDTSpecial Weather StatementMSO37 min
Sep 14, 6:42 PM MDTSpecial Weather StatementMSO48 min
Oct 3, 12:15 PM MDTWinter Weather AdvisoryMSO46 hr
Oct 9, 12:16 PM MDTWinter Storm WatchMSO49 hr
Oct 10, 12:47 PM MDTWinter Weather AdvisoryMSO71 hr
Oct 18, 12:50 PM MDTWinter Weather AdvisoryMSO44 hr
Oct 24, 2:28 PM MDTWinter Weather AdvisoryMSO70 hr
Nov 3, 8:13 PM MSTWinter Weather AdvisoryMSO13 hr
Nov 7, 6:59 AM MSTSpecial Weather StatementMSO31 min
Nov 25, 1:11 PM MSTWinter Storm WatchMSO47 hr
Nov 25, 1:11 PM MSTWinter Weather AdvisoryMSO22 hr
Nov 27, 11:45 AM MSTWinter Storm WarningMSO30 hr
Nov 30, 12:05 PM MSTWinter Weather AdvisoryMSO59 hr
Dec 3, 1:26 PM MSTWinter Storm WatchMSO46 hr
Dec 4, 1:02 PM MSTWinter Storm WarningMSO45 hr
Dec 4, 1:02 PM MSTWinter Weather AdvisoryMSO45 hr
Dec 6, 10:28 AM MSTSpecial Weather StatementMSO62 min
Dec 6, 8:50 PM MSTSpecial Weather StatementMSO55 min
Dec 6, 9:28 PM MSTSpecial Weather StatementMSO62 min
Dec 9, 12:42 AM MSTWinter Weather AdvisoryMSO34 hr
Dec 10, 1:16 AM MSTWind AdvisoryMSO42 hr
Dec 14, 1:43 PM MSTHigh Wind WatchMSO45 hr
Dec 15, 1:50 AM MSTWind AdvisoryMSO30 hr
Dec 16, 10:26 AM MSTHigh Wind WarningMSO34 hr
Dec 18, 11:21 AM MSTWind AdvisoryMSO24 hr
Dec 21, 2:40 AM MSTWinter Weather AdvisoryMSO32 hr
Dec 22, 1:21 PM MSTWinter Weather AdvisoryMSO25 hr
Dec 23, 12:55 PM MSTSpecial Weather StatementMSO65 min
Dec 25, 8:05 AM MSTDense Fog AdvisoryMSO5 hr
Dec 25, 1:45 PM MSTWinter Weather AdvisoryMSO54 hr
Dec 25, 1:52 PM MSTWind AdvisoryMSO39 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 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.