Alert archive / Montana / Flathead County

Weather alerts in Flathead County, Montana, 2010

117 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Flathead County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts
117
Warnings
20
Watches
10
Advisories
70
Busiest month
August23 alerts
Busiest day
August 1, 20106 alerts

Over time

By month

Warning verification

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

Flathead County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings6267%425%19 min
Flash flood warnings00

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: tornado warnings010%
NWS Missoula, MT: severe thunderstorm warnings532357%6755%19 min
NWS Missoula, MT: flash flood warnings70100%20%

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
Dec 31, 8:55 PM MSTWinter Weather AdvisoryMSO13 hr
Jan 1, 5:14 AM MSTWinter Storm WarningMSO30 hr
Jan 1, 5:14 AM MSTWinter Weather AdvisoryMSO33 hr
Jan 3, 1:43 PM MSTWinter Storm WatchMSO14 hr
Jan 4, 3:37 AM MSTWinter Storm WarningMSO47 hr
Jan 4, 1:49 PM MSTWinter Weather AdvisoryMSO39 hr
Jan 10, 11:20 PM MSTDense Fog AdvisoryMSO13 hr
Jan 11, 10:26 PM MSTDense Fog AdvisoryMSO6 hr
Jan 12, 3:59 AM MSTDense Fog AdvisoryMSO4 hr
Jan 12, 1:54 PM MSTWinter Weather AdvisoryMSO17 hr
Jan 13, 6:59 AM MSTDense Fog AdvisoryMSO8 hr
Jan 14, 3:29 AM MSTDense Fog AdvisoryMSO5 hr
Jan 15, 2:45 PM MSTWinter Weather AdvisoryMSO13 hr
Jan 16, 8:16 PM MSTDense Fog AdvisoryMSO18 hr
Jan 22, 3:47 AM MSTWinter Weather AdvisoryMSO43 hr
Jan 30, 9:41 PM MSTWinter Weather AdvisoryMSO17 hr
Feb 1, 8:41 PM MSTDense Fog AdvisoryMSO8 hr
Mar 8, 2:23 PM MSTWinter Weather AdvisoryMSO21 hr
Mar 31, 3:58 AM MDTWinter Weather AdvisoryMSO6 hr
Apr 7, 2:22 PM MDTHigh Wind WarningMSO31 hr
Apr 7, 2:22 PM MDTWind AdvisoryMSO31 hr
Apr 7, 9:35 PM MDTWinter Weather AdvisoryMSO26 hr
Apr 12, 2:50 PM MDTWinter Storm WatchMSO13 hr
Apr 12, 2:50 PM MDTWinter Storm WarningMSO43 hr
Apr 13, 9:43 PM MDTWinter Weather AdvisoryMSO7 hr
Apr 24, 3:44 AM MDTLake Wind AdvisoryMSO17 hr
Apr 27, 2:27 PM MDTWinter Storm WatchMSO13 hr
Apr 27, 2:31 PM MDTLake Wind AdvisoryMSO31 hr
Apr 28, 3:32 AM MDTWinter Storm WarningMSO50 hr
May 1, 2:42 PM MDTHigh Wind WatchMSO31 hr
May 2, 11:13 AM MDTHigh Wind WarningMSO41 hr
May 2, 11:13 AM MDTWind AdvisoryMSO28 hr
May 3, 9:22 PM MDTWinter Weather AdvisoryMSO7 hr
May 4, 4:01 AM MDTWinter Storm WarningMSO20 hr
May 19, 1:07 PM MDTLake Wind AdvisoryMSO29 hr
May 20, 12:32 PM MDTFrost AdvisoryMSO19 hr
May 28, 10:09 PM MDTWinter Weather AdvisoryMSO14 hr
Jun 15, 2:27 PM MDTFlood WatchMSO53 hr
Jun 20, 1:20 AM MDTFlood WatchMSO37 hr
Jun 20, 5:32 PM MDTSpecial Weather StatementMSO43 min
Jun 24, 5:10 PM MDTSpecial Weather StatementMSO50 min
Jun 29, 1:41 PM MDTMesoscale DiscussionSPC64 min
Jun 29, 2:31 PM MDTSevere Thunderstorm WatchSPC10 hr
Jun 29, 3:37 PM MDTSevere Thunderstorm WarningMSO27 min
Jul 11, 6:55 AM MDTLake Wind AdvisoryMSO8 hr
Jul 11, 2:56 PM MDTWind AdvisoryMSO30 hr
Jul 13, 9:26 AM MDTLake Wind AdvisoryMSO7 hr
Jul 19, 1:08 PM MDTSpecial Weather StatementMSO52 min
Jul 19, 3:46 PM MDTSpecial Weather StatementMSO29 min
Jul 19, 5:10 PM MDTSpecial Weather StatementMSO20 min
Jul 22, 1:51 PM MDTLake Wind AdvisoryMSO9 hr
Jul 22, 7:06 PM MDTSevere Thunderstorm WarningMSO39 min
Jul 31, 5:31 PM MDTSevere Thunderstorm WarningMSO29 min
Jul 31, 6:43 PM MDTSpecial Weather StatementMSO32 min
Jul 31, 7:30 PM MDTSevere Thunderstorm WarningMSO45 min
Jul 31, 8:10 PM MDTSevere Thunderstorm WarningMSO30 min
Jul 31, 8:13 PM MDTSpecial Weather StatementMSO32 min
Jul 31, 8:53 PM MDTSpecial Weather StatementMSO37 min
Aug 1, 1:34 PM MDTSpecial Weather StatementMSO41 min
Aug 2, 2:56 PM MDTAreal Flood AdvisoryMSO114 min
Aug 2, 3:13 PM MDTSpecial Weather StatementMSO32 min
Aug 2, 3:44 PM MDTSpecial Weather StatementMSO31 min
Aug 2, 4:18 PM MDTSpecial Weather StatementMSO42 min
Aug 2, 5:00 PM MDTSpecial Weather StatementMSO30 min
Aug 6, 4:09 PM MDTSevere Thunderstorm WarningMSO51 min
Aug 6, 4:54 PM MDTSpecial Weather StatementMSO66 min
Aug 6, 6:45 PM MDTSpecial Weather StatementMSO45 min
Aug 10, 5:19 PM MDTSpecial Weather StatementMSO41 min
Aug 12, 12:26 PM MDTWinter Weather AdvisoryMSO22 hr
Aug 20, 12:00 PM MDTRed Flag WarningMSO33 hr
Aug 20, 1:34 PM MDTLake Wind AdvisoryMSO26 hr
Aug 23, 11:07 AM MDTFrost AdvisoryMSO22 hr
Aug 24, 1:57 PM MDTFire Weather WatchMSO24 hr
Aug 25, 2:14 PM MDTRed Flag WarningMSO34 hr
Aug 26, 3:07 AM MDTLake Wind AdvisoryMSO19 hr
Aug 31, 2:41 PM MDTWinter Weather AdvisoryMSO27 hr
Sep 4, 2:29 PM MDTWinter Weather AdvisoryMSO37 hr
Sep 16, 3:53 AM MDTWinter Weather AdvisoryMSO34 hr
Sep 16, 7:06 PM MDTLake Wind AdvisoryMSO15 hr
Oct 23, 1:35 PM MDTWinter Weather AdvisoryMSO70 hr
Oct 30, 7:44 AM MDTDense Fog AdvisoryMSO3 hr
Nov 5, 7:30 AM MDTDense Fog AdvisoryMSO6 hr
Nov 11, 2:45 PM MSTWinter Weather AdvisoryMSO21 hr
Nov 14, 2:24 PM MSTWinter Weather AdvisoryMSO69 hr
Nov 15, 4:42 AM MSTWinter Storm WarningMSO33 hr
Nov 17, 2:55 PM MSTWinter Weather AdvisoryMSO28 hr
Nov 19, 3:06 AM MSTWind Chill AdvisoryMSO56 hr
Nov 19, 3:06 AM MSTWinter Weather AdvisoryMSO44 hr
Nov 19, 2:26 PM MSTLake Wind AdvisoryMSO13 hr
Nov 20, 3:21 AM MSTLake Wind AdvisoryMSO8 hr
Nov 20, 3:37 AM MSTWind Chill AdvisoryMSO31 hr
Nov 21, 3:05 AM MSTWinter Storm WarningMSO58 hr
Nov 21, 3:05 AM MSTWinter Weather AdvisoryMSO58 hr
Nov 22, 2:27 PM MSTBlizzard WarningMSO23 hr
Nov 23, 10:21 AM MSTWind Chill AdvisoryMSO10 hr
Nov 25, 8:02 AM MSTWinter Weather AdvisoryMSO3 days
Nov 29, 1:57 PM MSTWinter Weather AdvisoryMSO43 hr
Dec 1, 2:47 PM MSTWinter Weather AdvisoryMSO38 hr
Dec 8, 3:30 AM MSTWinter Storm WatchMSO35 hr
Dec 8, 7:55 AM MSTFreezing Rain AdvisoryMSO7 hr
Dec 8, 10:26 AM MSTWinter Weather AdvisoryMSO4 hr
Dec 8, 2:40 PM MSTWinter Storm WarningMSO56 hr
Dec 8, 7:44 PM MSTWinter Weather AdvisoryMSO46 hr
Dec 9, 4:36 AM MSTWinter Weather AdvisoryMSO31 hr
Dec 10, 2:54 PM MSTWinter Weather AdvisoryMSO46 hr
Dec 19, 3:52 AM MSTWinter Weather AdvisoryMSO33 hr
Dec 21, 6:04 AM MSTFreezing Fog AdvisoryMSO7 hr
Dec 21, 5:48 PM MSTFreezing Fog AdvisoryMSO19 hr
Dec 23, 9:26 PM MSTFreezing Fog AdvisoryMSO11 hr
Dec 25, 5:44 AM MSTFreezing Fog AdvisoryMSO8 hr
Dec 25, 6:17 PM MSTFreezing Fog AdvisoryMSO19 hr
Dec 26, 3:38 AM MSTWinter Weather AdvisoryMSO38 hr
Dec 26, 6:27 AM MSTFreezing Rain AdvisoryMSO5 hr
Dec 27, 3:49 AM MSTWinter Storm WatchMSO31 hr
Dec 27, 3:49 AM MSTWinter Weather AdvisoryMSO13 hr
Dec 27, 5:17 PM MSTWinter Storm WarningMSO60 hr
Dec 30, 3:49 AM MSTWind Chill AdvisoryMSO11 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 archive20092011

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.