Alert archive / Montana / Lake County

Weather alerts in Lake County, Montana, 2011

139 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lake County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts
139
Warnings
20
Watches
12
Advisories
89
Busiest month
November21 alerts
Busiest day
July 13, 20116 alerts

Over time

By month

Warning verification

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

Lake County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings3233%786%14 min
Flash flood warnings00

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Missoula, MT: severe thunderstorm warnings17947%2560%16 min
NWS Missoula, MT: flash flood warnings40100%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 4, 2:49 PM MSTWinter Weather AdvisoryMSO20 hr
Jan 7, 4:00 AM MSTWinter Weather AdvisoryMSO64 hr
Jan 10, 2:07 PM MSTWinter Storm WatchMSO14 hr
Jan 11, 3:58 AM MSTWinter Storm WarningMSO61 hr
Jan 11, 3:58 AM MSTWinter Weather AdvisoryMSO11 hr
Jan 11, 3:00 PM MSTWinter Weather AdvisoryMSO50 hr
Jan 13, 10:07 PM MSTFreezing Rain AdvisoryMSO11 hr
Jan 14, 2:31 PM MSTWinter Weather AdvisoryMSO12 hr
Jan 18, 3:21 AM MSTWinter Weather AdvisoryMSO30 hr
Jan 20, 3:41 PM MSTWinter Weather AdvisoryMSO4 hr
Jan 21, 3:29 AM MSTWinter Storm WarningMSO29 hr
Jan 21, 3:29 AM MSTWinter Weather AdvisoryMSO26 hr
Jan 24, 10:51 PM MSTWinter Weather AdvisoryMSO12 hr
Jan 26, 1:36 AM MSTDense Fog AdvisoryMSO2 hr
Jan 27, 3:46 AM MSTDense Fog AdvisoryMSO9 hr
Jan 28, 3:21 AM MSTWinter Storm WatchMSO23 hr
Jan 29, 2:45 AM MSTWinter Storm WarningMSO38 hr
Jan 30, 3:00 PM MSTWind Chill WarningMSO22 hr
Feb 3, 1:32 PM MSTWinter Weather AdvisoryMSO30 hr
Feb 5, 3:04 PM MSTWinter Storm WatchMSO13 hr
Feb 6, 4:13 AM MSTWinter Storm WarningMSO53 hr
Feb 7, 11:02 PM MSTWind Chill AdvisoryMSO10 hr
Feb 11, 2:03 PM MSTWind AdvisoryMSO44 hr
Feb 11, 2:09 PM MSTWinter Weather AdvisoryMSO43 hr
Feb 14, 1:53 PM MSTWinter Weather AdvisoryMSO3 days
Feb 18, 7:25 AM MSTWinter Weather AdvisoryMSO3 hr
Feb 18, 11:39 AM MSTWind Chill AdvisoryMSO16 hr
Feb 19, 6:14 PM MSTWinter Weather AdvisoryMSO34 hr
Feb 21, 4:31 AM MSTWinter Weather AdvisoryMSO52 hr
Feb 21, 2:36 PM MSTWinter Storm WarningMSO72 hr
Feb 23, 5:18 AM MSTWinter Weather AdvisoryMSO54 hr
Feb 24, 7:34 AM MSTWind Chill WarningMSO25 hr
Feb 25, 1:22 PM MSTWinter Storm WatchMSO25 hr
Feb 26, 1:57 PM MSTWind AdvisoryMSO56 hr
Feb 26, 1:58 PM MSTWinter Storm WarningMSO3 days
Feb 26, 1:58 PM MSTWinter Weather AdvisoryMSO69 hr
Feb 28, 1:21 PM MSTWinter Weather AdvisoryMSO22 hr
Mar 4, 7:14 AM MSTWinter Weather AdvisoryMSO3 hr
Mar 5, 9:05 AM MSTWinter Weather AdvisoryMSO3 hr
Mar 6, 2:58 AM MSTWind Chill AdvisoryMSO8 hr
Mar 10, 9:56 AM MSTWinter Weather AdvisoryMSO23 hr
Mar 14, 2:37 PM MDTWinter Weather AdvisoryMSO42 hr
Mar 16, 9:06 AM MDTLake Wind AdvisoryMSO9 hr
Mar 21, 3:14 AM MDTWinter Weather AdvisoryMSO33 hr
Mar 29, 2:10 PM MDTLake Wind AdvisoryMSO20 hr
Mar 30, 10:30 AM MDTLake Wind AdvisoryMSO7 hr
Mar 31, 9:43 AM MDTLake Wind AdvisoryMSO7 hr
Apr 1, 11:31 AM MDTWinter Weather AdvisoryMSO48 hr
Apr 2, 3:38 PM MDTLake Wind AdvisoryMSO4 hr
Apr 3, 2:37 PM MDTWinter Weather AdvisoryMSO45 hr
Apr 5, 3:55 AM MDTLake Wind AdvisoryMSO16 hr
Apr 5, 3:55 AM MDTWind AdvisoryMSO16 hr
Apr 14, 2:01 PM MDTWinter Weather AdvisoryMSO22 hr
Apr 15, 1:59 PM MDTWinter Weather AdvisoryMSO20 hr
Apr 16, 2:17 PM MDTWinter Weather AdvisoryMSO21 hr
Apr 17, 11:32 AM MDTWinter Storm WarningMSO12 hr
Apr 18, 12:49 PM MDTWinter Weather AdvisoryMSO21 hr
Apr 20, 2:13 PM MDTWinter Weather AdvisoryMSO44 hr
Apr 21, 2:03 PM MDTWinter Storm WarningMSO18 hr
Apr 25, 2:22 PM MDTWinter Weather AdvisoryMSO20 hr
Apr 28, 3:13 AM MDTWinter Weather AdvisoryMSO51 hr
May 14, 3:15 AM MDTWind AdvisoryMSO19 hr
May 24, 1:24 PM MDTAreal Flood AdvisoryMSO72 hr
May 25, 3:12 AM MDTWinter Weather AdvisoryMSO54 hr
Jun 2, 2:36 PM MDTWinter Weather AdvisoryMSO17 hr
Jun 6, 4:13 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 7, 10:27 AM MDTAreal Flood WarningMSO70 hr
Jun 14, 3:03 PM MDTLake Wind AdvisoryMSO30 hr
Jun 18, 2:23 PM MDTSpecial Weather StatementMSO52 min
Jun 22, 12:16 PM MDTFlood WatchMSO68 hr
Jun 23, 12:16 PM MDTMesoscale DiscussionSPC59 min
Jun 23, 12:55 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 28, 7:03 AM MDTSpecial Weather StatementMSO27 min
Jun 29, 12:04 PM MDTLake Wind AdvisoryMSO6 hr
Jun 29, 12:35 PM MDTMesoscale DiscussionSPC115 min
Jun 30, 7:30 AM MDTLake Wind AdvisoryMSO10 hr
Jul 1, 10:14 AM MDTFlood WatchMSO49 hr
Jul 7, 11:43 AM MDTWind AdvisoryMSO33 hr
Jul 12, 12:56 PM MDTMesoscale DiscussionSPC64 min
Jul 12, 10:56 PM MDTSpecial Weather StatementMSO34 min
Jul 12, 11:01 PM MDTSpecial Weather StatementMSO44 min
Jul 13, 12:36 PM MDTMesoscale DiscussionSPC114 min
Jul 13, 1:45 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 13, 5:13 PM MDTMesoscale DiscussionSPC62 min
Jul 13, 5:46 PM MDTSpecial Weather StatementMSO44 min
Jul 13, 7:33 PM MDTMesoscale DiscussionSPC57 min
Jul 16, 6:05 PM MDTSpecial Weather StatementMSO40 min
Jul 19, 3:56 PM MDTSpecial Weather StatementMSO49 min
Jul 19, 5:30 PM MDTSevere Thunderstorm WarningMSO30 min
Jul 25, 5:38 PM MDTSpecial Weather StatementMSO52 min
Jul 25, 5:48 PM MDTSevere Thunderstorm WarningMSO42 min
Jul 25, 7:52 PM MDTSevere Thunderstorm WarningMSO38 min
Jul 31, 5:25 AM MDTSpecial Weather StatementMSO50 min
Aug 5, 3:59 PM MDTSpecial Weather StatementMSO26 min
Aug 8, 8:52 PM MDTSpecial Weather StatementMSO53 min
Aug 30, 11:33 AM MDTWinter Weather AdvisoryMSO48 hr
Sep 2, 7:12 AM MDTLake Wind AdvisoryMSO6 hr
Sep 2, 7:12 AM MDTWind AdvisoryMSO6 hr
Sep 2, 1:32 PM MDTFrost AdvisoryMSO19 hr
Sep 3, 2:19 PM MDTFrost AdvisoryMSO19 hr
Sep 19, 9:43 AM MDTLake Wind AdvisoryMSO10 hr
Sep 19, 10:53 AM MDTSpecial Weather StatementMSO67 min
Sep 20, 2:22 PM MDTFrost AdvisoryMSO19 hr
Sep 26, 2:45 PM MDTLake Wind AdvisoryMSO31 hr
Oct 6, 3:55 AM MDTWinter Weather AdvisoryMSO14 hr
Oct 7, 3:10 AM MDTWinter Weather AdvisoryMSO18 hr
Oct 14, 10:55 AM MDTWinter Weather AdvisoryMSO19 hr
Oct 19, 7:50 AM MDTDense Fog AdvisoryMSO3 hr
Oct 28, 11:12 AM MDTWinter Weather AdvisoryMSO22 hr
Nov 9, 2:11 PM MSTWinter Storm WatchMSO22 hr
Nov 10, 12:24 PM MSTWinter Storm WarningMSO45 hr
Nov 10, 2:02 PM MSTLake Wind AdvisoryMSO24 hr
Nov 11, 2:16 PM MSTLake Wind AdvisoryMSO13 hr
Nov 12, 9:14 AM MSTLake Wind AdvisoryMSO11 hr
Nov 12, 1:50 PM MSTWinter Weather AdvisoryMSO69 hr
Nov 13, 7:57 AM MSTLake Wind AdvisoryMSO12 hr
Nov 15, 2:10 PM MSTWinter Storm WatchMSO14 hr
Nov 16, 3:54 AM MSTWinter Storm WarningMSO43 hr
Nov 17, 4:48 AM MSTWinter Weather AdvisoryMSO6 hr
Nov 17, 2:36 PM MSTWind Chill AdvisoryMSO23 hr
Nov 17, 2:36 PM MSTWinter Weather AdvisoryMSO38 hr
Nov 18, 8:31 AM MSTWinter Storm WarningMSO20 hr
Nov 20, 4:27 AM MSTWinter Weather AdvisoryMSO6 hr
Nov 20, 2:48 PM MSTWinter Weather AdvisoryMSO13 hr
Nov 21, 3:42 AM MSTWinter Storm WarningMSO7 hr
Nov 21, 10:27 AM MSTWinter Weather AdvisoryMSO31 hr
Nov 23, 1:48 PM MSTWinter Weather AdvisoryMSO48 hr
Nov 28, 2:44 PM MSTWinter Storm WatchMSO14 hr
Nov 29, 4:38 AM MSTWinter Storm WarningMSO36 hr
Nov 29, 4:38 AM MSTWinter Weather AdvisoryMSO36 hr
Dec 8, 8:26 AM MSTDense Fog AdvisoryMSO4 hr
Dec 9, 2:47 PM MSTDense Fog AdvisoryMSO20 hr
Dec 10, 2:44 PM MSTDense Fog AdvisoryMSO17 hr
Dec 17, 7:35 PM MSTDense Fog AdvisoryMSO9 hr
Dec 20, 2:45 PM MSTWinter Weather AdvisoryMSO24 hr
Dec 25, 6:24 AM MSTFreezing Fog AdvisoryMSO6 hr
Dec 27, 3:15 AM MSTWinter Weather AdvisoryMSO57 hr
Dec 29, 2:30 PM MSTWinter Weather AdvisoryMSO42 hr
Dec 29, 10:14 PM MSTWinter Storm WarningMSO29 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 archive20102012

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.