Alert archive / Montana / Powell County

Weather alerts in Powell County, Montana, 2014

114 weather alerts in 2014, 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 2014. Tap one for its archive.

Alerts
114
Warnings
26
Watches
14
Advisories
60
Busiest month
February28 alerts
Busiest day
August 15, 20145 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, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5260%1100%25 min
Flash flood warnings00

Each office's whole area, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings10460%1822%13 min
NWS Missoula, MT: flash flood warnings80100%20%

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 1, 1:42 PM MSTWind AdvisoryMSO45 hr
Jan 2, 2:37 PM MSTWinter Weather AdvisoryMSO50 hr
Jan 3, 10:52 PM MSTWinter Weather AdvisoryMSO12 hr
Jan 5, 1:33 AM MSTWind Chill AdvisoryMSO12 hr
Jan 8, 1:33 PM MSTHigh Wind WatchMSO68 hr
Jan 8, 1:33 PM MSTWinter Weather AdvisoryMSO21 hr
Jan 10, 3:17 AM MSTWinter Weather AdvisoryMSO9 hr
Jan 10, 12:09 PM MSTHigh Wind WarningMSO34 hr
Jan 10, 12:18 PM MSTWinter Storm WarningMSO3 days
Jan 11, 9:16 PM MSTWinter Weather AdvisoryMSO42 hr
Jan 12, 11:06 AM MSTWind AdvisoryMSO28 hr
Jan 13, 7:23 AM MSTHigh Wind WarningMSO8 hr
Jan 25, 3:08 AM MSTWinter Weather AdvisoryMSO38 hr
Jan 28, 4:13 AM MSTWinter Storm WarningMSO3 days
Jan 28, 4:13 AM MSTWinter Weather AdvisoryMSO4 days
Feb 2, 11:06 AM MSTWinter Weather AdvisoryMSO48 hr
Feb 3, 2:23 PM MSTWind Chill WarningMSO63 hr
Feb 6, 7:33 AM MSTExtreme Cold WarningMSO3 hr
Feb 7, 1:36 PM MSTWinter Weather AdvisoryMSO48 hr
Feb 10, 4:03 AM MSTWinter Weather AdvisoryMSO34 hr
Feb 10, 2:36 PM MSTWinter Storm WatchMSO24 hr
Feb 11, 2:27 PM MSTWinter Storm WarningMSO48 hr
Feb 11, 2:27 PM MSTWinter Weather AdvisoryMSO51 hr
Feb 11, 2:28 PM MSTWind AdvisoryMSO27 hr
Feb 13, 2:32 AM MSTFreezing Rain AdvisoryMSO6 hr
Feb 13, 2:38 AM MSTWind AdvisoryMSO6 hr
Feb 15, 1:03 PM MSTWinter Weather AdvisoryMSO68 hr
Feb 16, 4:11 AM MSTWinter Weather AdvisoryMSO53 hr
Feb 16, 1:51 PM MSTWind AdvisoryMSO6 hr
Feb 18, 1:51 PM MSTWinter Weather AdvisoryMSO19 hr
Feb 19, 2:41 PM MSTWinter Weather AdvisoryMSO48 hr
Feb 19, 6:57 PM MSTWinter Weather AdvisoryMSO5 hr
Feb 21, 4:47 AM MSTWinter Storm WarningMSO6 hr
Feb 21, 3:03 PM MSTWinter Storm WatchMSO24 hr
Feb 22, 2:54 PM MSTWinter Storm WarningMSO44 hr
Feb 22, 2:54 PM MSTWinter Weather AdvisoryMSO65 hr
Feb 24, 6:36 PM MSTWinter Storm WarningMSO10 hr
Feb 26, 2:57 PM MSTBlizzard WatchMSO24 hr
Feb 26, 8:46 PM MSTWinter Storm WatchMSO23 hr
Feb 27, 12:44 PM MSTFreezing Rain AdvisoryMSO7 hr
Feb 27, 2:56 PM MSTBlizzard WarningMSO44 hr
Feb 27, 2:56 PM MSTWinter Storm WarningMSO48 hr
Feb 27, 7:50 PM MSTWinter Weather AdvisoryMSO42 hr
Mar 1, 4:51 AM MSTWind Chill WarningMSO27 hr
Mar 1, 10:59 AM MSTWind Chill WarningMSO21 hr
Mar 1, 1:52 PM MSTWinter Weather AdvisoryMSO43 hr
Mar 3, 2:01 PM MSTWinter Weather AdvisoryMSO20 hr
Mar 5, 2:35 AM MSTAreal Flood AdvisoryMSO55 hr
Mar 9, 11:27 AM MDTWinter Weather AdvisoryMSO45 hr
Mar 16, 3:20 AM MDTWinter Weather AdvisoryMSO45 hr
Mar 23, 7:05 AM MDTWinter Weather AdvisoryMSO3 hr
Mar 28, 2:11 PM MDTWinter Weather AdvisoryMSO34 hr
Apr 22, 9:47 AM MDTWind AdvisoryMSO8 hr
Apr 22, 9:14 PM MDTWinter Weather AdvisoryMSO12 hr
Apr 25, 9:22 AM MDTWinter Weather AdvisoryMSO25 hr
May 10, 2:08 PM MDTWinter Weather AdvisoryMSO22 hr
May 27, 6:12 PM MDTMesoscale DiscussionSPC48 min
Jun 16, 2:46 PM MDTWinter Weather AdvisoryMSO21 hr
Jun 20, 2:24 PM MDTMesoscale DiscussionSPC66 min
Jul 3, 5:41 PM MDTSpecial Weather StatementMSO34 min
Jul 14, 2:05 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 14, 5:42 PM MDTMesoscale DiscussionSPC63 min
Jul 14, 8:16 PM MDTMesoscale DiscussionSPC59 min
Jul 15, 12:47 PM MDTSpecial Weather StatementMSO43 min
Jul 15, 1:54 PM MDTSpecial Weather StatementMSO36 min
Jul 15, 2:37 PM MDTAreal Flood AdvisoryMSO113 min
Jul 22, 2:49 PM MDTMesoscale DiscussionSPC86 min
Jul 23, 7:43 PM MDTSevere Thunderstorm WarningMSO29 min
Jul 23, 8:11 PM MDTSevere Thunderstorm WarningMSO23 min
Aug 11, 3:51 AM MDTFire Weather WatchMSO24 hr
Aug 12, 3:53 AM MDTRed Flag WarningMSO20 hr
Aug 14, 12:47 PM MDTMesoscale DiscussionSPC88 min
Aug 15, 11:55 AM MDTSpecial Weather StatementMSO35 min
Aug 15, 12:05 PM MDTSevere Thunderstorm WarningMSO25 min
Aug 15, 12:08 PM MDTSevere Thunderstorm WarningMSO22 min
Aug 15, 1:05 PM MDTAreal Flood AdvisoryMSO115 min
Aug 15, 5:36 PM MDTSpecial Weather StatementMSO54 min
Aug 15, 7:52 PM MDTSevere Thunderstorm WarningMSO53 min
Aug 15, 8:38 PM MDTSpecial Weather StatementMSO37 min
Aug 21, 5:40 PM MDTAreal Flood AdvisoryMSO2 hr
Aug 21, 6:09 PM MDTSpecial Weather StatementMSO51 min
Aug 22, 4:09 AM MDTFlood WatchMSO24 hr
Aug 22, 12:11 PM MDTWinter Weather AdvisoryMSO24 hr
Sep 8, 2:14 PM MDTWinter Weather AdvisoryMSO68 hr
Sep 10, 10:46 AM MDTFreeze WarningMSO46 hr
Oct 10, 9:43 AM MDTWind AdvisoryMSO34 hr
Oct 15, 10:02 AM MDTWind AdvisoryMSO11 hr
Oct 20, 11:40 AM MDTWinter Weather AdvisoryMSO32 hr
Oct 30, 2:55 PM MDTWinter Storm WatchMSO55 hr
Nov 1, 3:36 AM MDTWinter Storm WarningMSO36 hr
Nov 1, 2:35 PM MDTWinter Weather AdvisoryMSO25 hr
Nov 1, 6:55 PM MDTSpecial Weather StatementMSO50 min
Nov 7, 8:59 AM MSTWinter Storm WatchMSO50 hr
Nov 9, 10:52 AM MSTWinter Storm WarningMSO24 hr
Nov 10, 12:16 PM MSTWind Chill WarningMSO53 hr
Nov 13, 2:26 PM MSTWinter Weather AdvisoryMSO42 hr
Nov 14, 4:42 AM MSTWind Chill AdvisoryMSO27 hr
Nov 20, 11:53 AM MSTWinter Weather AdvisoryMSO4 days
Nov 20, 11:53 AM MSTWinter Weather AdvisoryMSO4 days
Nov 23, 2:41 PM MSTWinter Storm WatchMSO25 hr
Nov 24, 3:30 PM MSTWinter Storm WarningMSO47 hr
Nov 24, 3:30 PM MSTWinter Weather AdvisoryMSO44 hr
Nov 27, 2:33 PM MSTWinter Storm WatchMSO18 hr
Nov 28, 8:33 AM MSTWinter Weather AdvisoryMSO39 hr
Dec 3, 4:27 AM MSTWinter Weather AdvisoryMSO56 hr
Dec 6, 8:28 AM MSTWinter Weather AdvisoryMSO15 hr
Dec 12, 11:59 AM MSTWinter Weather AdvisoryMSO56 hr
Dec 19, 3:20 PM MSTWinter Storm WatchMSO19 hr
Dec 20, 10:28 AM MSTWinter Weather AdvisoryMSO49 hr
Dec 23, 2:44 PM MSTWinter Weather AdvisoryMSO44 hr
Dec 26, 3:54 AM MSTWinter Storm WatchMSO24 hr
Dec 26, 1:53 PM MSTWinter Weather AdvisoryMSO69 hr
Dec 27, 3:39 AM MSTWinter Storm WarningMSO55 hr
Dec 29, 11:41 AM MSTWind Chill AdvisoryMSO21 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 archive20132015

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.