Alert archive / Montana / Musselshell County

Weather alerts in Musselshell County, Montana, 2009

80 weather alerts in 2009, 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 2009. Tap one for its archive.

Alerts
80
Warnings
16
Watches
14
Advisories
17
Busiest month
July27 alerts
Busiest day
July 2, 20095 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, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings8363%667%22 min
Flash flood warnings00

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: severe thunderstorm warnings852867%6360%23 min
NWS Billings, MT: flash flood warnings8363%850%11 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, 3:37 PM MSTWinter Weather AdvisoryBYZ43 hr
Jan 8, 4:01 PM MSTWinter Weather AdvisoryBYZ17 hr
Jan 13, 3:23 PM MSTWinter Weather AdvisoryBYZ35 hr
Jan 15, 9:16 AM MSTWinter Weather AdvisoryBYZ12 hr
Feb 19, 3:06 PM MSTWinter Weather AdvisoryBYZ23 hr
Feb 26, 3:44 AM MSTWinter Storm WarningBYZ32 hr
Feb 26, 10:12 AM MSTWinter Weather AdvisoryBYZ26 hr
Mar 7, 3:16 PM MSTWinter Weather AdvisoryBYZ61 hr
Mar 27, 3:11 PM MDTWinter Storm WatchBYZ22 hr
Mar 28, 12:49 PM MDTWinter Storm WarningBYZ51 hr
Apr 2, 3:53 PM MDTWinter Weather AdvisoryBYZ42 hr
Apr 22, 9:12 AM MDTRed Flag WarningBYZ11 hr
Apr 23, 4:26 AM MDTWinter Storm WarningBYZ30 hr
Apr 23, 4:26 AM MDTWinter Weather AdvisoryBYZ30 hr
Jun 20, 9:28 PM MDTSpecial Weather StatementBYZ92 min
Jun 30, 2:35 PM MDTMesoscale DiscussionSPC55 min
Jun 30, 7:01 PM MDTSpecial Weather StatementBYZ44 min
Jul 2, 3:41 PM MDTMesoscale DiscussionSPC34 min
Jul 2, 4:09 PM MDTSpecial Weather StatementTFX36 min
Jul 2, 4:12 PM MDTSevere Thunderstorm WatchSPC4 hr
Jul 2, 4:16 PM MDTSevere Thunderstorm WarningBYZ59 min
Jul 2, 5:14 PM MDTSevere Thunderstorm WarningBYZ30 min
Jul 2, 6:18 PM MDTSpecial Weather StatementBYZ57 min
Jul 2, 6:59 PM MDTMesoscale DiscussionSPC61 min
Jul 4, 1:39 PM MDTMesoscale DiscussionSPC3 hr
Jul 4, 7:01 PM MDTSevere Thunderstorm WarningBYZ39 min
Jul 5, 6:09 PM MDTSpecial Weather StatementBYZ51 min
Jul 5, 6:46 PM MDTSpecial Weather StatementBYZ59 min
Jul 6, 1:05 PM MDTMesoscale DiscussionSPC55 min
Jul 6, 1:33 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 6, 4:02 PM MDTMesoscale DiscussionSPC58 min
Jul 6, 6:07 PM MDTSpecial Weather StatementBYZ53 min
Jul 6, 6:23 PM MDTMesoscale DiscussionSPC67 min
Jul 6, 8:14 PM MDTMesoscale DiscussionSPC31 min
Jul 7, 7:46 PM MDTSpecial Weather StatementBYZ59 min
Jul 7, 8:45 PM MDTSpecial Weather StatementBYZ60 min
Jul 7, 10:24 PM MDTSpecial Weather StatementBYZ66 min
Jul 12, 4:33 PM MDTMesoscale DiscussionSPC2 hr
Jul 13, 12:10 PM MDTMesoscale DiscussionSPC95 min
Jul 13, 1:02 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 13, 4:53 PM MDTSevere Thunderstorm WarningBYZ37 min
Jul 13, 5:51 PM MDTSpecial Weather StatementBYZ54 min
Jul 26, 3:02 PM MDTSpecial Weather StatementBYZ58 min
Aug 6, 2:16 PM MDTMesoscale DiscussionSPC59 min
Aug 6, 2:58 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 6, 6:28 PM MDTMesoscale DiscussionSPC92 min
Aug 7, 11:50 AM MDTMesoscale DiscussionSPC115 min
Aug 7, 2:38 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 7, 4:15 PM MDTFlash Flood WatchBYZ6 hr
Aug 7, 5:35 PM MDTSevere Thunderstorm WarningBYZ55 min
Aug 7, 6:15 PM MDTSevere Thunderstorm WarningBYZ60 min
Aug 8, 10:31 AM MDTSpecial Weather StatementBYZ59 min
Aug 13, 2:39 PM MDTMesoscale DiscussionSPC2 hr
Aug 13, 3:59 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 13, 8:00 PM MDTSpecial Weather StatementBYZ60 min
Aug 13, 8:20 PM MDTSevere Thunderstorm WarningBYZ53 min
Aug 13, 8:24 PM MDTMesoscale DiscussionSPC66 min
Aug 14, 2:01 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 14, 5:10 PM MDTMesoscale DiscussionSPC65 min
Aug 14, 6:42 PM MDTSpecial Weather StatementBYZ63 min
Aug 14, 7:15 PM MDTSevere Thunderstorm WarningBYZ53 min
Aug 14, 8:11 PM MDTSpecial Weather StatementBYZ64 min
Sep 4, 3:37 PM MDTFire Weather WatchBYZ37 hr
Sep 6, 4:46 AM MDTRed Flag WarningBYZ16 hr
Sep 10, 4:12 AM MDTRed Flag WarningBYZ17 hr
Sep 18, 3:19 AM MDTFire Weather WatchBYZ36 hr
Sep 24, 2:57 PM MDTFire Weather WatchBYZ24 hr
Sep 25, 2:56 PM MDTRed Flag WarningBYZ31 hr
Oct 2, 2:48 PM MDTWinter Storm WatchBYZ49 hr
Oct 3, 3:54 PM MDTWinter Storm WarningBYZ54 hr
Oct 5, 1:44 AM MDTMesoscale DiscussionSPC5 hr
Nov 11, 9:37 AM MSTWinter Weather AdvisoryBYZ35 hr
Dec 4, 3:45 PM MSTWinter Weather AdvisoryBYZ36 hr
Dec 8, 2:24 PM MSTWind Chill AdvisoryBYZ21 hr
Dec 9, 2:53 PM MSTWind Chill AdvisoryBYZ12 hr
Dec 11, 2:58 PM MSTWinter Storm WatchBYZ24 hr
Dec 12, 2:57 PM MSTWinter Weather AdvisoryBYZ50 hr
Dec 20, 11:16 PM MSTWinter Weather AdvisoryBYZ16 hr
Dec 21, 5:10 PM MSTDense Fog AdvisoryBYZ24 hr
Dec 22, 4:17 AM MSTWinter Weather AdvisoryBYZ41 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 archive20082010

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.