Alert archive / Montana / Silver Bow County

Weather alerts in Silver Bow County, Montana, 2016

95 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Silver Bow County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts
95
Warnings
15
Watches
9
Advisories
57
Busiest month
December16 alerts
Busiest day
June 7, 20166 alerts

Over time

By month

Warning verification

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

Silver Bow County, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings220%2100%7 min
Flash flood warnings00

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings191426%4146%12 min
NWS Missoula, MT: flash flood warnings10100%0

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 5, 2:08 PM MSTWinter Weather AdvisoryMSO69 hr
Jan 15, 12:19 PM MSTWinter Weather AdvisoryMSO47 hr
Jan 19, 4:22 AM MSTWinter Weather AdvisoryMSO34 hr
Jan 23, 1:23 PM MSTWinter Weather AdvisoryMSO21 hr
Jan 27, 4:58 AM MSTFreezing Rain AdvisoryMSO4 hr
Jan 29, 4:54 AM MSTWinter Weather AdvisoryMSO28 hr
Jan 30, 10:34 AM MSTWinter Weather AdvisoryMSO33 hr
Jan 31, 8:35 PM MSTWinter Weather AdvisoryMSO49 hr
Feb 5, 2:24 PM MSTWinter Weather AdvisoryMSO31 hr
Feb 13, 2:16 PM MSTWinter Weather AdvisoryMSO46 hr
Feb 15, 3:16 AM MSTHigh Wind WarningMSO14 hr
Feb 18, 9:56 AM MSTWinter Weather AdvisoryMSO23 hr
Feb 18, 2:26 PM MSTWind AdvisoryMSO19 hr
Feb 19, 12:20 PM MSTWinter Weather AdvisoryMSO28 hr
Feb 19, 10:09 PM MSTSpecial Weather StatementMSO66 min
Feb 19, 11:08 PM MSTSpecial Weather StatementMSO67 min
Feb 28, 11:53 AM MSTWind AdvisoryMSO26 hr
Mar 1, 10:35 AM MSTWinter Weather AdvisoryMSO24 hr
Mar 1, 10:46 AM MSTWind AdvisoryMSO21 hr
Mar 7, 1:59 PM MSTWinter Weather AdvisoryMSO21 hr
Mar 10, 2:12 PM MSTWind AdvisoryMSO5 hr
Mar 13, 2:09 PM MDTWinter Weather AdvisoryMSO22 hr
Mar 14, 2:18 PM MDTWinter Weather AdvisoryMSO22 hr
Mar 16, 1:14 PM MDTWinter Weather AdvisoryMSO31 hr
Mar 21, 1:35 PM MDTWinter Weather AdvisoryMSO38 hr
Mar 27, 6:50 PM MDTWinter Weather AdvisoryMSO8 hr
Mar 27, 9:14 PM MDTWinter Weather AdvisoryMSO41 hr
Mar 28, 9:57 AM MDTHigh Wind WatchMSO5 hr
Apr 3, 8:50 PM MDTWind AdvisoryMSO24 hr
Apr 4, 2:10 PM MDTWinter Weather AdvisoryMSO20 hr
Apr 4, 5:13 PM MDTSpecial Weather StatementMSO32 min
Apr 14, 6:35 AM MDTWinter Weather AdvisoryMSO5 hr
Apr 14, 12:43 PM MDTWinter Weather AdvisoryMSO29 hr
May 9, 12:25 PM MDTWinter Weather AdvisoryMSO24 hr
May 25, 7:50 AM MDTDense Fog AdvisoryMSO70 min
Jun 7, 12:50 PM MDTMesoscale DiscussionSPC2 hr
Jun 7, 2:07 PM MDTFlash Flood WatchMSO60 min
Jun 7, 3:07 PM MDTFlash Flood WatchMSO4 hr
Jun 7, 3:17 PM MDTSpecial Weather StatementMSO13 min
Jun 7, 3:28 PM MDTAreal Flood AdvisoryMSO62 min
Jun 7, 5:48 PM MDTAreal Flood AdvisoryMSO57 min
Jun 8, 2:39 PM MDTMesoscale DiscussionSPC3 hr
Jun 8, 8:41 PM MDTSpecial Weather StatementMSO64 min
Jun 8, 9:12 PM MDTSevere Thunderstorm WarningMSO33 min
Jun 17, 2:16 PM MDTWind AdvisoryMSO31 hr
Jul 3, 1:46 PM MDTRed Flag WarningMSO31 hr
Jul 10, 1:41 PM MDTSpecial Weather StatementTFX49 min
Jul 10, 1:45 PM MDTSpecial Weather StatementMSO45 min
Jul 21, 2:31 PM MDTRed Flag WarningMSO31 hr
Jul 29, 2:22 PM MDTFire Weather WatchMSO24 hr
Jul 30, 2:13 PM MDTRed Flag WarningMSO30 hr
Jul 31, 8:11 PM MDTFire Weather WatchMSO16 hr
Aug 1, 12:35 PM MDTRed Flag WarningMSO35 hr
Aug 5, 2:22 PM MDTFire Weather WatchMSO21 hr
Aug 6, 11:01 AM MDTRed Flag WarningMSO10 hr
Aug 6, 2:37 PM MDTMesoscale DiscussionSPC2 hr
Aug 7, 1:52 PM MDTMesoscale DiscussionSPC2 hr
Aug 7, 3:46 PM MDTSpecial Weather StatementMSO59 min
Aug 7, 3:59 PM MDTSevere Thunderstorm WarningMSO46 min
Aug 8, 2:06 PM MDTFire Weather WatchMSO13 hr
Aug 9, 3:14 AM MDTRed Flag WarningMSO18 hr
Aug 9, 2:19 PM MDTMesoscale DiscussionSPC116 min
Aug 20, 2:18 PM MDTFire Weather WatchMSO21 hr
Aug 21, 11:02 AM MDTRed Flag WarningMSO34 hr
Sep 1, 1:45 PM MDTRed Flag WarningMSO30 hr
Sep 2, 12:51 PM MDTWinter Weather AdvisoryMSO71 hr
Sep 10, 2:16 PM MDTWinter Weather AdvisoryMSO42 hr
Sep 12, 2:17 PM MDTFreeze WarningMSO19 hr
Oct 2, 3:14 AM MDTWinter Weather AdvisoryMSO45 hr
Oct 4, 2:08 PM MDTWinter Weather AdvisoryMSO22 hr
Oct 10, 9:54 AM MDTWind AdvisoryMSO4 hr
Oct 10, 10:37 PM MDTWinter Weather AdvisoryMSO13 hr
Oct 19, 3:50 AM MDTWinter Weather AdvisoryMSO5 hr
Nov 15, 11:12 AM MSTWinter Weather AdvisoryMSO22 hr
Nov 22, 12:15 PM MSTWinter Weather AdvisoryMSO45 hr
Nov 23, 5:37 PM MSTSpecial Weather StatementMSO38 min
Nov 27, 3:47 AM MSTWinter Weather AdvisoryMSO40 hr
Nov 28, 8:03 PM MSTWinter Weather AdvisoryMSO12 hr
Nov 29, 1:12 PM MSTWinter Weather AdvisoryMSO62 hr
Dec 2, 2:43 PM MSTWinter Storm WatchMSO43 hr
Dec 2, 2:43 PM MSTWinter Weather AdvisoryMSO20 hr
Dec 3, 2:19 PM MSTWinter Weather AdvisoryMSO45 hr
Dec 5, 2:21 PM MSTWind Chill AdvisoryMSO46 hr
Dec 9, 12:08 PM MSTWinter Weather AdvisoryMSO23 hr
Dec 11, 2:00 PM MSTWinter Weather AdvisoryMSO24 hr
Dec 12, 9:04 PM MSTWinter Weather AdvisoryMSO12 hr
Dec 14, 3:24 AM MSTWinter Weather AdvisoryMSO3 days
Dec 15, 5:58 AM MSTWinter Storm WarningMSO5 hr
Dec 15, 3:14 PM MSTWinter Storm WarningMSO31 hr
Dec 18, 8:12 AM MSTWinter Weather AdvisoryMSO32 hr
Dec 19, 4:20 AM MSTWind AdvisoryMSO12 hr
Dec 19, 2:01 PM MSTWinter Weather AdvisoryMSO34 hr
Dec 20, 2:45 AM MSTHigh Wind WarningMSO15 hr
Dec 22, 2:49 PM MSTWinter Weather AdvisoryMSO71 hr
Dec 26, 3:31 AM MSTWinter Weather AdvisoryMSO55 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 archive20152017

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.