Alert archive / Montana / Silver Bow County

Weather alerts in Silver Bow County, Montana, 2019

119 weather alerts in 2019, 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 2019. Tap one for its archive.

Alerts
119
Warnings
27
Watches
11
Advisories
46
Busiest month
February22 alerts
Busiest day
August 10, 201912 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, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings7357%944%8 min
Flash flood warnings00

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings351460%5235%9 min
NWS Missoula, MT: flash flood warnings10100%40%

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, 3:36 AM MSTWinter Weather AdvisoryMSO46 hr
Jan 7, 5:13 AM MSTSpecial Weather StatementMSO62 min
Jan 16, 1:16 PM MSTWinter Weather AdvisoryMSO44 hr
Jan 19, 1:24 PM MSTWinter Weather AdvisoryMSO43 hr
Jan 22, 10:02 AM MSTWinter Weather AdvisoryMSO32 hr
Jan 24, 12:16 AM MSTWinter Weather AdvisoryMSO9 hr
Jan 27, 4:28 PM MSTWinter Weather AdvisoryMSO8 hr
Jan 31, 2:50 PM MSTWinter Storm WatchMSO44 hr
Feb 2, 10:51 AM MSTWinter Storm WarningMSO48 hr
Feb 3, 8:49 PM MSTWind Chill WarningMSO14 hr
Feb 4, 11:05 AM MSTWind Chill WarningMSO6 hr
Feb 4, 7:58 PM MSTWinter Weather AdvisoryMSO45 hr
Feb 7, 11:19 AM MSTWinter Storm WatchMSO23 hr
Feb 7, 11:19 AM MSTWinter Weather AdvisoryMSO3 days
Feb 8, 10:19 AM MSTWinter Storm WarningMSO17 hr
Feb 9, 9:09 AM MSTWind Chill AdvisoryMSO23 hr
Feb 12, 5:15 PM MSTWinter Weather AdvisoryMSO39 hr
Feb 14, 10:43 AM MSTWinter Weather AdvisoryMSO46 hr
Feb 15, 12:02 PM MSTWinter Weather AdvisoryMSO21 hr
Feb 16, 9:07 AM MSTWinter Weather AdvisoryMSO48 hr
Feb 17, 8:17 AM MSTWind Chill AdvisoryMSO20 hr
Feb 18, 3:03 PM MSTWinter Weather AdvisoryMSO47 hr
Feb 20, 2:27 PM MSTWinter Weather AdvisoryMSO17 hr
Feb 23, 7:45 AM MSTWinter Weather AdvisoryMSO3 days
Feb 23, 1:45 PM MSTWinter Storm WatchMSO38 hr
Feb 24, 2:20 PM MSTWinter Storm WarningMSO45 hr
Feb 24, 8:08 PM MSTSnow Squall WarningMSO67 min
Feb 27, 6:17 AM MSTWinter Weather AdvisoryMSO14 hr
Feb 27, 8:20 PM MSTWinter Weather AdvisoryMSO25 hr
Feb 28, 1:59 PM MSTWinter Storm WatchMSO22 hr
Mar 1, 3:33 AM MSTWinter Storm WarningMSO30 hr
Mar 1, 2:48 PM MSTWind Chill WatchMSO19 hr
Mar 2, 9:44 AM MSTWind Chill WarningMSO25 hr
Mar 3, 2:37 PM MSTExtreme Cold WarningMSO20 hr
Mar 7, 11:44 AM MSTWinter Weather AdvisoryMSO3 hr
Mar 12, 2:07 PM MDTWinter Weather AdvisoryMSO22 hr
Mar 26, 2:42 PM MDTWinter Weather AdvisoryMSO45 hr
Apr 9, 11:44 AM MDTWinter Weather AdvisoryMSO24 hr
Apr 15, 7:40 PM MDTWinter Weather AdvisoryMSO16 hr
Apr 20, 3:46 PM MDTSpecial Weather StatementMSO44 min
Apr 26, 1:06 PM MDTWind AdvisoryMSO41 hr
Apr 28, 7:13 AM MDTWinter Weather AdvisoryMSO5 hr
Apr 29, 3:44 AM MDTWinter Weather AdvisoryMSO23 hr
May 17, 7:42 PM MDTWinter Weather AdvisoryMSO14 hr
May 26, 3:12 PM MDTSpecial Weather StatementMSO18 min
May 26, 3:18 PM MDTSpecial Weather StatementMSO42 min
May 31, 2:24 PM MDTSpecial Weather StatementMSO51 min
May 31, 2:29 PM MDTSpecial Weather StatementTFX61 min
May 31, 2:49 PM MDTAreal Flood AdvisoryMSO56 min
Jun 6, 8:38 AM MDTWind AdvisoryMSO13 hr
Jun 6, 1:54 PM MDTMesoscale DiscussionSPC2 hr
Jun 16, 2:03 PM MDTSpecial Weather StatementMSO27 min
Jun 18, 11:40 AM MDTWind AdvisoryMSO33 hr
Jun 25, 5:38 PM MDTSpecial Weather StatementMSO22 min
Jun 27, 12:31 PM MDTMesoscale DiscussionSPC119 min
Jun 27, 2:17 PM MDTSpecial Weather StatementTFX13 min
Jun 27, 2:33 PM MDTSpecial Weather StatementTFX42 min
Jul 6, 3:52 PM MDTMesoscale DiscussionSPC113 min
Jul 13, 11:38 AM MDTSpecial Weather StatementMSO37 min
Jul 14, 2:10 PM MDTMesoscale DiscussionSPC3 hr
Jul 14, 6:19 PM MDTSpecial Weather StatementMSO41 min
Jul 16, 6:47 PM MDTSpecial Weather StatementMSO43 min
Jul 16, 7:25 PM MDTSpecial Weather StatementTFX35 min
Jul 16, 7:47 PM MDTSpecial Weather StatementMSO43 min
Jul 16, 8:05 PM MDTSpecial Weather StatementTFX40 min
Jul 16, 8:48 PM MDTSpecial Weather StatementMSO42 min
Jul 16, 8:48 PM MDTSpecial Weather StatementTFX27 min
Jul 16, 9:03 PM MDTSevere Thunderstorm WarningMSO27 min
Jul 16, 9:31 PM MDTSpecial Weather StatementMSO44 min
Jul 23, 4:13 PM MDTMesoscale DiscussionSPC2 hr
Jul 26, 2:33 PM MDTRed Flag WarningMSO29 hr
Jul 28, 2:12 PM MDTRed Flag WarningMSO31 hr
Jul 30, 5:13 AM MDTRed Flag WarningMSO16 hr
Jul 30, 5:05 PM MDTSevere Thunderstorm WarningMSO25 min
Jul 31, 4:47 AM MDTRed Flag WarningMSO16 hr
Aug 1, 2:31 PM MDTRed Flag WarningMSO32 hr
Aug 7, 2:29 PM MDTFire Weather WatchMSO13 hr
Aug 7, 7:53 PM MDTSpecial Weather StatementTFX37 min
Aug 8, 3:12 AM MDTRed Flag WarningMSO18 hr
Aug 9, 2:23 PM MDTFlash Flood WatchMSO32 hr
Aug 10, 11:41 AM MDTMesoscale DiscussionSPC2 hr
Aug 10, 1:36 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 10, 3:34 PM MDTSpecial Weather StatementTFX26 min
Aug 10, 3:46 PM MDTSpecial Weather StatementMSO29 min
Aug 10, 3:51 PM MDTSevere Thunderstorm WarningMSO24 min
Aug 10, 4:00 PM MDTSpecial Weather StatementTFX45 min
Aug 10, 4:15 PM MDTSevere Thunderstorm WarningMSO38 min
Aug 10, 4:37 PM MDTSevere Thunderstorm WarningMSO23 min
Aug 10, 4:53 PM MDTSevere Thunderstorm WarningMSO22 min
Aug 10, 4:53 PM MDTMesoscale DiscussionSPC2 hr
Aug 10, 4:56 PM MDTAreal Flood AdvisoryMSO2 hr
Aug 10, 5:17 PM MDTSpecial Weather StatementMSO13 min
Aug 10, 7:27 PM MDTSpecial Weather StatementMSO33 min
Aug 11, 11:28 AM MDTSevere Thunderstorm WarningMSO21 min
Aug 11, 11:33 AM MDTMesoscale DiscussionSPC87 min
Aug 11, 2:43 PM MDTMesoscale DiscussionSPC92 min
Sep 3, 1:44 PM MDTRed Flag WarningMSO30 hr
Sep 6, 4:36 PM MDTSpecial Weather StatementMSO24 min
Sep 24, 2:03 PM MDTWinter Storm WatchMSO5 days
Sep 26, 2:33 PM MDTWinter Storm WarningMSO3 days
Oct 6, 2:41 PM MDTWinter Storm WatchMSO33 hr
Oct 7, 2:55 PM MDTWinter Storm WarningMSO44 hr
Oct 7, 11:17 PM MDTWinter Weather AdvisoryMSO49 hr
Oct 20, 2:16 PM MDTWinter Weather AdvisoryMSO21 hr
Oct 22, 2:02 AM MDTWind AdvisoryMSO17 hr
Oct 24, 2:29 PM MDTWind AdvisoryMSO31 hr
Oct 24, 2:31 PM MDTWinter Weather AdvisoryMSO46 hr
Oct 27, 2:51 PM MDTWinter Weather AdvisoryMSO36 hr
Oct 28, 9:58 AM MDTWind Chill AdvisoryMSO26 hr
Oct 28, 9:58 AM MDTWinter Storm WarningMSO11 hr
Nov 8, 12:27 PM MSTWinter Storm WatchMSO39 hr
Nov 8, 12:27 PM MSTWinter Weather AdvisoryMSO58 hr
Nov 10, 9:28 AM MSTWinter Storm WarningMSO11 hr
Nov 18, 1:45 PM MSTWinter Weather AdvisoryMSO39 hr
Nov 27, 4:01 AM MSTWinter Weather AdvisoryMSO17 hr
Nov 28, 4:00 AM MSTWinter Weather AdvisoryMSO9 hr
Nov 28, 1:48 PM MSTWinter Weather AdvisoryMSO45 hr
Dec 6, 2:15 PM MSTWinter Weather AdvisoryMSO52 hr
Dec 14, 1:52 PM MSTWinter Weather AdvisoryMSO45 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 archive20182020

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.