Alert archive / Montana / Silver Bow County

Weather alerts in Silver Bow County, Montana, 2008

95 weather alerts in 2008, 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 2008. Tap one for its archive.

Alerts
95
Warnings
31
Watches
13
Advisories
39
Busiest month
August20 alerts
Busiest day
January 18, 20083 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, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5180%250%10 min
Flash flood warnings00

Each office's whole area, 2008

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings381171%3067%17 min
NWS Missoula, MT: flash flood warnings110%978%50 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 3, 3:41 AM MSTWind AdvisoryMSO42 hr
Jan 14, 2:00 PM MSTSnow and Blowing Snow AdvisoryMSO27 hr
Jan 18, 2:19 PM MSTSnow AdvisoryMSO51 hr
Jan 18, 2:19 PM MSTWinter Storm WarningMSO39 hr
Jan 18, 2:19 PM MSTWinter Weather AdvisoryMSO34 hr
Jan 19, 2:29 PM MSTWind Chill AdvisoryMSO14 hr
Jan 20, 4:48 AM MSTWind Chill WarningMSO29 hr
Jan 20, 4:48 AM MSTWinter Weather AdvisoryMSO15 hr
Jan 28, 9:03 AM MSTWinter Weather AdvisoryMSO12 hr
Jan 30, 2:10 PM MSTHigh Wind WatchMSO19 hr
Jan 30, 2:10 PM MSTWind AdvisoryMSO27 hr
Jan 31, 6:12 PM MSTSnow and Blowing Snow AdvisoryMSO10 hr
Feb 1, 3:45 AM MSTBlowing Snow AdvisoryMSO5 hr
Feb 6, 10:54 AM MSTHigh Wind WatchMSO17 hr
Feb 6, 10:54 AM MSTHigh Wind WarningMSO23 hr
Feb 6, 10:54 AM MSTWinter Storm WarningMSO52 hr
Feb 8, 8:32 AM MSTBlowing Snow AdvisoryMSO13 hr
Feb 24, 4:44 PM MSTSnow AdvisoryMSO22 hr
Mar 3, 4:55 AM MSTSnow and Blowing Snow AdvisoryMSO42 hr
Mar 12, 2:29 PM MDTSnow AdvisoryMSO28 hr
Mar 19, 2:14 PM MDTSnow AdvisoryMSO16 hr
Mar 30, 3:42 AM MDTSnow AdvisoryMSO32 hr
Apr 4, 2:38 PM MDTWinter Storm WarningMSO21 hr
Apr 5, 11:54 AM MDTSnow AdvisoryMSO5 hr
Apr 9, 9:00 PM MDTSnow AdvisoryMSO2 hr
Apr 17, 2:22 PM MDTWinter Storm WatchMSO24 hr
Apr 18, 4:38 AM MDTWind AdvisoryMSO16 hr
Apr 18, 2:49 PM MDTHeavy Snow WarningMSO37 hr
Apr 18, 2:49 PM MDTWinter Storm WarningMSO51 hr
Apr 29, 10:54 AM MDTSnow and Blowing Snow AdvisoryMSO17 hr
May 20, 6:15 PM MDTSevere Thunderstorm WarningMSO30 min
May 20, 11:21 PM MDTSevere Thunderstorm WarningMSO39 min
May 22, 5:39 AM MDTSnow AdvisoryMSO4 hr
May 22, 9:37 AM MDTHeavy Snow WarningMSO23 hr
Jun 2, 1:19 PM MDTMesoscale DiscussionSPC86 min
Jun 4, 7:50 AM MDTSnow AdvisoryMSO13 hr
Jun 10, 3:41 AM MDTHeavy Snow WarningMSO40 hr
Jun 10, 3:41 AM MDTWinter Storm WatchMSO11 hr
Jun 10, 9:54 AM MDTMesoscale DiscussionSPC66 min
Jun 17, 2:09 PM MDTMesoscale DiscussionSPC66 min
Jul 1, 1:26 PM MDTMesoscale DiscussionSPC2 hr
Jul 4, 1:45 PM MDTMesoscale DiscussionSPC60 min
Jul 4, 2:04 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 4, 5:45 PM MDTMesoscale DiscussionSPC60 min
Jul 4, 8:36 PM MDTMesoscale DiscussionSPC54 min
Jul 4, 9:57 PM MDTSevere Thunderstorm WarningMSO48 min
Jul 9, 1:56 PM MDTFire Weather WatchMSO14 hr
Jul 9, 2:27 PM MDTHigh Wind WarningMSO31 hr
Jul 10, 4:01 AM MDTRed Flag WarningMSO18 hr
Jul 22, 3:12 PM MDTMesoscale DiscussionSPC63 min
Jul 30, 2:27 AM MDTWind AdvisoryMSO12 hr
Jul 30, 8:24 AM MDTRed Flag WarningMSO13 hr
Aug 1, 3:43 AM MDTRed Flag WarningMSO17 hr
Aug 2, 4:47 PM MDTMesoscale DiscussionSPC58 min
Aug 5, 2:32 PM MDTFire Weather WatchMSO41 hr
Aug 7, 3:45 AM MDTRed Flag WarningMSO29 hr
Aug 9, 11:46 AM MDTMesoscale DiscussionSPC59 min
Aug 9, 12:16 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 9, 5:50 PM MDTMesoscale DiscussionSPC55 min
Aug 17, 1:54 PM MDTRed Flag WarningMSO54 hr
Aug 18, 2:46 PM MDTFire Weather WatchMSO13 hr
Aug 19, 12:43 PM MDTMesoscale DiscussionSPC92 min
Aug 19, 1:31 PM MDTSevere Thunderstorm WatchSPC5 hr
Aug 21, 2:18 PM MDTRed Flag WarningMSO6 hr
Aug 24, 4:33 AM MDTFire Weather WatchMSO16 hr
Aug 24, 4:42 PM MDTRed Flag WarningMSO4 hr
Aug 24, 8:47 PM MDTRed Flag WarningMSO26 hr
Aug 28, 2:58 PM MDTFire Weather WatchMSO24 hr
Aug 29, 2:49 PM MDTRed Flag WarningMSO30 hr
Aug 31, 2:07 PM MDTSevere Thunderstorm WarningMSO8 min
Aug 31, 2:51 PM MDTWinter Weather AdvisoryMSO23 hr
Aug 31, 3:49 PM MDTSevere Thunderstorm WarningMSO41 min
Oct 7, 12:53 PM MDTWind AdvisoryMSO7 hr
Oct 9, 3:45 AM MDTWinter Weather AdvisoryMSO10 hr
Oct 9, 2:12 PM MDTWinter Storm WarningMSO25 hr
Oct 9, 2:12 PM MDTWinter Weather AdvisoryMSO38 hr
Oct 11, 3:44 AM MDTWinter Storm WarningMSO38 hr
Nov 3, 2:37 PM MSTWinter Weather AdvisoryMSO29 hr
Nov 8, 7:36 AM MSTDense Fog AdvisoryMSO3 hr
Nov 11, 2:31 PM MSTWind AdvisoryMSO28 hr
Nov 19, 2:41 PM MSTWind AdvisoryMSO18 hr
Nov 26, 4:54 AM MSTFreezing Rain AdvisoryMSO3 hr
Dec 1, 6:30 AM MSTDense Fog AdvisoryMSO3 hr
Dec 6, 9:38 PM MSTWinter Weather AdvisoryMSO30 hr
Dec 11, 3:41 AM MSTWinter Storm WatchMSO49 hr
Dec 12, 3:54 AM MSTWinter Storm WarningMSO55 hr
Dec 12, 11:57 AM MSTWinter Weather AdvisoryMSO40 hr
Dec 13, 2:59 PM MSTWind Chill WarningMSO50 hr
Dec 16, 1:41 PM MSTWinter Storm WarningMSO62 hr
Dec 19, 4:07 AM MSTWind Chill WarningMSO10 hr
Dec 20, 2:35 PM MSTWinter Weather AdvisoryMSO50 hr
Dec 27, 4:07 AM MSTWinter Weather AdvisoryMSO36 hr
Dec 28, 7:45 PM MSTWinter Storm WarningMSO25 hr
Dec 28, 7:45 PM MSTWinter Weather AdvisoryMSO25 hr
Dec 30, 2:35 PM MSTWinter Weather AdvisoryMSO32 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 archive20072009

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.