Alert archive / Montana / Deer Lodge County

Weather alerts in Deer Lodge County, Montana, 2021

108 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Deer Lodge County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
108
Warnings
23
Watches
16
Advisories
48
Busiest month
July20 alerts
Busiest day
July 21, 20214 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Deer Lodge County, 2021

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

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings14657%2642%11 min
NWS Missoula, MT: flash flood warnings3167%633%73 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 2, 1:37 PM MSTWind AdvisoryMSO27 hr
Jan 4, 11:45 AM MSTWinter Weather AdvisoryMSO21 hr
Jan 11, 2:39 PM MSTHigh Wind WatchMSO21 hr
Jan 12, 12:03 PM MSTHigh Wind WarningMSO32 hr
Jan 15, 12:50 PM MSTWinter Weather AdvisoryMSO10 hr
Jan 16, 1:14 PM MSTWinter Weather AdvisoryMSO39 hr
Jan 29, 1:12 PM MSTWinter Weather AdvisoryMSO10 hr
Feb 2, 9:27 AM MSTWinter Weather AdvisoryMSO20 hr
Feb 4, 11:07 AM MSTWinter Weather AdvisoryMSO26 hr
Feb 5, 2:59 PM MSTWinter Storm WatchMSO23 hr
Feb 5, 2:59 PM MSTWinter Storm WarningMSO50 hr
Feb 5, 2:59 PM MSTWinter Weather AdvisoryMSO68 hr
Feb 6, 3:12 AM MSTWinter Weather AdvisoryMSO5 hr
Feb 8, 7:47 AM MSTWind Chill AdvisoryMSO27 hr
Feb 10, 8:14 AM MSTWind Chill WarningMSO3 days
Feb 13, 10:58 AM MSTWind Chill AdvisoryMSO25 hr
Feb 14, 2:31 PM MSTWinter Weather AdvisoryMSO3 days
Feb 21, 8:20 AM MSTWinter Weather AdvisoryMSO71 hr
Feb 24, 11:07 AM MSTWinter Weather AdvisoryMSO72 hr
Mar 7, 1:51 PM MSTWinter Weather AdvisoryMSO45 hr
Mar 26, 11:59 AM MDTFire Weather WatchMSO24 hr
Mar 26, 1:49 PM MDTHigh Wind WatchMSO24 hr
Mar 27, 1:58 PM MDTHigh Wind WarningMSO43 hr
Mar 28, 11:03 AM MDTWinter Weather AdvisoryMSO24 hr
Apr 4, 1:17 PM MDTWinter Weather AdvisoryMSO29 hr
Apr 7, 12:10 PM MDTWinter Weather AdvisoryMSO22 hr
Apr 9, 11:53 AM MDTWind AdvisoryMSO36 hr
Apr 18, 11:40 AM MDTWinter Weather AdvisoryMSO23 hr
Apr 23, 3:23 AM MDTWinter Weather AdvisoryMSO6 hr
May 18, 2:37 PM MDTWinter Weather AdvisoryMSO67 hr
May 21, 8:31 PM MDTWinter Weather AdvisoryMSO3 hr
May 22, 2:13 PM MDTWinter Weather AdvisoryMSO22 hr
Jun 1, 1:55 PM MDTHeat AdvisoryMSO55 hr
Jun 3, 4:58 PM MDTMesoscale DiscussionSPC3 hr
Jun 4, 1:59 PM MDTMesoscale DiscussionSPC2 hr
Jun 8, 1:46 PM MDTSpecial Weather StatementTFX44 min
Jun 9, 2:13 PM MDTWinter Weather AdvisoryMSO29 hr
Jun 9, 4:43 PM MDTMesoscale DiscussionSPC92 min
Jun 13, 5:15 PM MDTSpecial Weather StatementMSO30 min
Jun 14, 12:00 PM MDTRed Flag WarningMSO36 hr
Jun 14, 2:27 PM MDTMesoscale DiscussionSPC2 hr
Jul 1, 1:45 PM MDTRed Flag WarningMSO30 hr
Jul 4, 4:24 PM MDTSpecial Weather StatementMSO36 min
Jul 4, 6:15 PM MDTSpecial Weather StatementMSO45 min
Jul 7, 2:18 PM MDTSpecial Weather StatementMSO42 min
Jul 7, 2:45 PM MDTSevere Thunderstorm WarningMSO30 min
Jul 8, 7:08 AM MDTRed Flag WarningMSO14 hr
Jul 9, 10:11 AM MDTFire Weather WatchMSO28 hr
Jul 10, 2:09 PM MDTRed Flag WarningMSO31 hr
Jul 14, 1:08 PM MDTRed Flag WarningMSO32 hr
Jul 15, 5:56 PM MDTSpecial Weather StatementMSO49 min
Jul 16, 6:28 PM MDTSpecial Weather StatementMSO47 min
Jul 18, 1:04 PM MDTRed Flag WarningMSO35 hr
Jul 20, 1:19 PM MDTFire Weather WatchMSO23 hr
Jul 20, 3:35 PM MDTSpecial Weather StatementTFX25 min
Jul 21, 12:17 PM MDTFire Weather WatchMSO25 hr
Jul 21, 2:40 PM MDTMesoscale DiscussionSPC95 min
Jul 21, 5:04 PM MDTSpecial Weather StatementTFX26 min
Jul 21, 5:43 PM MDTSpecial Weather StatementMSO17 min
Jul 22, 1:32 PM MDTRed Flag WarningMSO31 hr
Jul 30, 2:07 PM MDTFlash Flood WatchMSO55 hr
Aug 1, 11:33 AM MDTFlash Flood WatchMSO22 hr
Aug 2, 10:09 AM MDTFlash Flood WatchMSO9 hr
Aug 2, 2:21 PM MDTSpecial Weather StatementMSO54 min
Aug 4, 1:21 PM MDTRed Flag WarningMSO35 hr
Aug 5, 3:45 PM MDTSpecial Weather StatementTFX15 min
Aug 5, 4:12 PM MDTSpecial Weather StatementMSO48 min
Aug 6, 2:46 PM MDTFire Weather WatchMSO22 hr
Aug 7, 1:09 PM MDTRed Flag WarningMSO30 hr
Aug 8, 1:37 PM MDTSpecial Weather StatementMSO53 min
Sep 4, 12:51 PM MDTRed Flag WarningMSO32 hr
Sep 5, 10:30 AM MDTFire Weather WatchMSO10 hr
Sep 5, 8:35 PM MDTRed Flag WarningMSO24 hr
Sep 7, 3:51 AM MDTFire Weather WatchMSO8 hr
Sep 7, 12:16 PM MDTRed Flag WarningMSO32 hr
Sep 8, 8:50 PM MDTRed Flag WarningMSO24 hr
Sep 10, 6:40 PM MDTSpecial Weather StatementMSO50 min
Sep 16, 2:39 PM MDTRed Flag WarningMSO54 hr
Sep 17, 2:16 PM MDTHigh Wind WarningMSO31 hr
Oct 9, 1:57 PM MDTWinter Weather AdvisoryMSO63 hr
Oct 26, 10:54 AM MDTWind AdvisoryMSO30 hr
Nov 2, 7:42 AM MDTWinter Weather AdvisoryMSO2 hr
Nov 9, 2:23 PM MSTWinter Weather AdvisoryMSO19 hr
Nov 11, 6:58 AM MSTWinter Weather AdvisoryMSO5 hr
Nov 11, 2:28 PM MSTWinter Weather AdvisoryMSO20 hr
Nov 13, 1:30 PM MSTWind AdvisoryMSO29 hr
Nov 14, 1:12 PM MSTHigh Wind WatchMSO13 hr
Nov 15, 2:15 AM MSTHigh Wind WarningMSO30 hr
Nov 18, 3:06 PM MSTWinter Weather AdvisoryMSO36 hr
Dec 1, 7:41 AM MSTWind AdvisoryMSO9 hr
Dec 3, 1:25 PM MSTWinter Weather AdvisoryMSO46 hr
Dec 3, 1:29 PM MSTWind AdvisoryMSO30 hr
Dec 5, 3:03 PM MSTWinter Weather AdvisoryMSO42 hr
Dec 10, 3:01 PM MSTWinter Weather AdvisoryMSO65 hr
Dec 13, 12:30 AM MSTWinter Weather AdvisoryMSO8 hr
Dec 13, 1:51 PM MSTWinter Weather AdvisoryMSO32 hr
Dec 14, 7:40 AM MSTWinter Storm WarningMSO14 hr
Dec 15, 2:40 PM MSTWinter Weather AdvisoryMSO44 hr
Dec 17, 1:20 PM MSTWinter Storm WarningMSO64 hr
Dec 18, 2:38 PM MSTWinter Storm WatchMSO5 hr
Dec 18, 2:38 PM MSTWinter Weather AdvisoryMSO59 hr
Dec 22, 1:28 PM MSTWinter Weather AdvisoryMSO22 hr
Dec 23, 11:53 AM MSTWinter Weather AdvisoryMSO47 hr
Dec 23, 4:52 PM MSTSpecial Weather StatementMSO83 min
Dec 24, 12:32 PM MSTWinter Storm WatchMSO24 hr
Dec 25, 12:43 PM MSTWinter Weather AdvisoryMSO28 hr
Dec 28, 1:40 PM MSTWinter Weather AdvisoryMSO21 hr
Dec 29, 1:25 PM MSTWinter Weather AdvisoryMSO46 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 archive20202022

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.