Alert archive / Montana / Musselshell County

Weather alerts in Musselshell County, Montana, 2020

86 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Musselshell County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
86
Warnings
26
Watches
18
Advisories
13
Busiest month
August14 alerts
Busiest day
May 20, 20206 alerts

Over time

By month

Warning verification

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

Musselshell County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5420%1191%37 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: severe thunderstorm warnings714142%14355%29 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, 12:29 PM MSTHigh Wind WatchBYZ23 hr
Jan 3, 2:58 AM MSTHigh Wind WarningBYZ48 hr
Jan 9, 2:34 AM MSTWinter Weather AdvisoryBYZ29 hr
Jan 13, 3:37 AM MSTDense Fog AdvisoryBYZ5 hr
Jan 22, 4:16 AM MSTSpecial Weather StatementBYZ44 min
Feb 1, 2:15 PM MSTWinter Weather AdvisoryBYZ49 hr
Feb 8, 2:05 AM MSTWinter Weather AdvisoryBYZ30 hr
Feb 23, 9:17 PM MSTSpecial Weather StatementBYZ88 min
Feb 23, 10:45 PM MSTSpecial Weather StatementBYZ90 min
Feb 24, 1:48 AM MSTSpecial Weather StatementBYZ102 min
Mar 2, 3:08 AM MSTHigh Wind WarningBYZ65 hr
Mar 3, 3:25 AM MSTRed Flag WarningBYZ39 hr
Mar 12, 3:39 AM MDTWinter Storm WatchBYZ11 hr
Mar 12, 2:57 PM MDTWinter Storm WarningBYZ3 days
Mar 12, 2:57 PM MDTWinter Weather AdvisoryBYZ3 days
Mar 23, 1:15 PM MDTWinter Weather AdvisoryBYZ44 hr
Mar 25, 3:02 PM MDTSpecial Weather StatementBYZ58 min
Mar 31, 3:23 AM MDTWinter Weather AdvisoryBYZ61 hr
Apr 9, 3:21 AM MDTWinter Storm WatchBYZ24 hr
Apr 10, 3:01 AM MDTWinter Weather AdvisoryBYZ56 hr
May 3, 2:10 PM MDTMesoscale DiscussionSPC2 hr
May 3, 2:12 PM MDTSpecial Weather StatementBYZ63 min
May 5, 2:45 PM MDTHigh Wind WatchBYZ20 hr
May 6, 3:46 AM MDTHigh Wind WarningBYZ35 hr
May 19, 8:55 PM MDTSevere Thunderstorm WarningBYZ35 min
May 20, 12:55 AM MDTSevere Thunderstorm WarningBYZ50 min
May 20, 1:45 AM MDTSpecial Weather StatementBYZ45 min
May 20, 1:43 PM MDTMesoscale DiscussionSPC92 min
May 20, 3:11 PM MDTSevere Thunderstorm WatchSPC8 hr
May 20, 5:29 PM MDTSpecial Weather StatementBYZ46 min
May 20, 6:27 PM MDTMesoscale DiscussionSPC93 min
Jun 24, 9:09 PM MDTSpecial Weather StatementBYZ51 min
Jun 24, 10:01 PM MDTSpecial Weather StatementBYZ44 min
Jul 1, 6:40 PM MDTSpecial Weather StatementBYZ35 min
Jul 6, 12:59 PM MDTSpecial Weather StatementBYZ46 min
Jul 6, 1:44 PM MDTSpecial Weather StatementBYZ61 min
Jul 6, 2:23 PM MDTSevere Thunderstorm WarningBYZ37 min
Jul 7, 12:47 PM MDTMesoscale DiscussionSPC2 hr
Jul 7, 1:14 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 7, 3:42 PM MDTSevere Thunderstorm WarningBYZ63 min
Jul 7, 4:44 PM MDTSevere Thunderstorm WarningBYZ61 min
Jul 9, 10:34 PM MDTSpecial Weather StatementBYZ56 min
Jul 17, 2:41 PM MDTMesoscale DiscussionSPC2 hr
Jul 23, 5:24 PM MDTMesoscale DiscussionSPC2 hr
Aug 3, 12:20 PM MDTMesoscale DiscussionSPC55 min
Aug 6, 2:29 AM MDTFire Weather WatchBYZ12 hr
Aug 6, 1:53 PM MDTMesoscale DiscussionSPC2 hr
Aug 6, 2:44 PM MDTRed Flag WarningBYZ30 hr
Aug 11, 1:49 PM MDTRed Flag WarningBYZ31 hr
Aug 12, 6:13 PM MDTSpecial Weather StatementBYZ47 min
Aug 16, 1:02 PM MDTHeat AdvisoryBYZ55 hr
Aug 17, 2:11 PM MDTRed Flag WarningBYZ30 hr
Aug 20, 2:44 PM MDTMesoscale DiscussionSPC2 hr
Aug 25, 5:48 PM MDTMesoscale DiscussionSPC117 min
Aug 25, 7:53 PM MDTSpecial Weather StatementBYZ52 min
Aug 26, 2:44 PM MDTMesoscale DiscussionSPC91 min
Aug 30, 2:17 PM MDTFire Weather WatchBYZ13 hr
Aug 31, 3:27 AM MDTRed Flag WarningBYZ69 hr
Sep 3, 3:14 AM MDTFire Weather WatchBYZ32 hr
Sep 4, 11:14 AM MDTRed Flag WarningBYZ57 hr
Sep 12, 2:46 AM MDTFire Weather WatchBYZ24 hr
Sep 13, 3:11 AM MDTRed Flag WarningBYZ42 hr
Sep 22, 1:46 PM MDTFire Weather WatchBYZ24 hr
Sep 23, 1:22 PM MDTRed Flag WarningBYZ31 hr
Sep 25, 10:53 AM MDTRed Flag WarningBYZ33 hr
Oct 2, 1:47 PM MDTFire Weather WatchBYZ24 hr
Oct 3, 2:04 PM MDTRed Flag WarningBYZ30 hr
Oct 6, 3:26 AM MDTRed Flag WarningBYZ17 hr
Oct 7, 3:33 AM MDTFire Weather WatchBYZ7 hr
Oct 7, 10:35 AM MDTRed Flag WarningBYZ34 hr
Oct 9, 2:29 AM MDTFire Weather WatchBYZ9 hr
Oct 9, 11:58 AM MDTRed Flag WarningBYZ32 hr
Oct 13, 2:57 PM MDTHigh Wind WarningBYZ27 hr
Oct 16, 2:32 PM MDTWinter Weather AdvisoryBYZ4 days
Oct 20, 3:33 AM MDTWinter Storm WatchBYZ25 hr
Oct 21, 4:34 AM MDTWinter Weather AdvisoryBYZ40 hr
Oct 22, 2:31 PM MDTWinter Storm WatchBYZ24 hr
Oct 23, 3:58 AM MDTWinter Storm WarningBYZ50 hr
Nov 5, 1:28 PM MSTWinter Storm WatchBYZ38 hr
Nov 7, 3:51 AM MSTWinter Storm WarningBYZ37 hr
Nov 8, 9:27 AM MSTMesoscale DiscussionSPC5 hr
Dec 21, 11:00 AM MSTHigh Wind WatchBYZ15 hr
Dec 21, 7:49 PM MSTDense Fog AdvisoryBYZ6 hr
Dec 22, 2:18 AM MSTHigh Wind WarningBYZ24 hr
Dec 28, 4:27 AM MSTSpecial Weather StatementBYZ108 min
Dec 28, 5:44 AM MSTDense Fog AdvisoryBYZ6 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 archive20192021

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.