Alert archive / Montana / Garfield County

Weather alerts in Garfield County, Montana, 2012

189 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Garfield County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts
189
Warnings
56
Watches
30
Advisories
71
Busiest month
June39 alerts
Busiest day
June 9, 201211 alerts

Over time

By month

Warning verification

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

Garfield County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings232013%1573%24 min
Flash flood warnings00

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Glasgow, MT: severe thunderstorm warnings906627%13579%29 min
NWS Glasgow, MT: flash flood warnings10100%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
Jan 4, 2:38 PM MSTHigh Wind WatchGGW13 hr
Jan 15, 5:16 AM MSTWind Chill AdvisoryGGW28 hr
Jan 17, 3:11 PM MSTWind Chill AdvisoryGGW54 hr
Jan 18, 4:01 AM MSTWinter Weather AdvisoryGGW48 hr
Jan 24, 3:31 AM MSTHigh Wind WatchGGW24 hr
Jan 25, 3:32 AM MSTHigh Wind WarningGGW17 hr
Feb 22, 2:24 PM MSTSpecial Weather StatementGGW66 min
Feb 22, 2:50 PM MSTSpecial Weather StatementGGW55 min
Feb 24, 3:27 PM MSTWinter Weather AdvisoryGGW43 hr
Mar 1, 2:18 AM MSTWinter Weather AdvisoryGGW9 hr
Mar 8, 2:27 PM MSTFire Weather WatchGGW13 hr
Mar 9, 3:38 AM MSTRed Flag WarningGGW16 hr
Mar 12, 2:52 PM MDTFire Weather WatchGGW13 hr
Mar 13, 3:35 AM MDTHigh Wind WarningGGW20 hr
Mar 13, 3:54 AM MDTRed Flag WarningGGW24 hr
Mar 15, 3:54 AM MDTFire Weather WatchGGW24 hr
Mar 16, 3:53 AM MDTRed Flag WarningGGW41 hr
Mar 18, 2:20 PM MDTWinter Weather AdvisoryGGW13 hr
Mar 19, 3:49 AM MDTWinter Storm WarningGGW16 hr
Mar 25, 6:50 AM MDTLake Wind AdvisoryGGW29 hr
Mar 26, 3:23 PM MDTLake Wind AdvisoryGGW29 hr
Mar 28, 3:38 AM MDTLake Wind AdvisoryGGW14 hr
Mar 29, 4:20 AM MDTFire Weather WatchGGW24 hr
Mar 30, 3:53 AM MDTRed Flag WarningGGW17 hr
Mar 30, 3:58 AM MDTLake Wind AdvisoryGGW17 hr
Mar 31, 3:51 AM MDTRed Flag WarningGGW16 hr
Mar 31, 2:16 PM MDTLake Wind AdvisoryGGW49 hr
Mar 31, 2:41 PM MDTRed Flag WarningGGW30 hr
Apr 2, 3:37 AM MDTRed Flag WarningGGW14 hr
Apr 3, 3:39 AM MDTLake Wind AdvisoryGGW41 hr
Apr 3, 3:55 AM MDTFire Weather WatchGGW11 hr
Apr 3, 2:51 PM MDTRed Flag WarningGGW30 hr
Apr 5, 4:18 AM MDTBlizzard WatchGGW36 hr
Apr 6, 3:45 AM MDTBlizzard WarningGGW17 hr
Apr 6, 3:20 PM MDTWinter Weather AdvisoryGGW17 hr
Apr 7, 10:16 AM MDTLake Wind AdvisoryGGW10 hr
Apr 8, 3:19 AM MDTLake Wind AdvisoryGGW17 hr
Apr 10, 2:51 PM MDTLake Wind AdvisoryGGW54 hr
Apr 14, 3:01 PM MDTLake Wind AdvisoryGGW30 hr
Apr 17, 9:50 AM MDTLake Wind AdvisoryGGW11 hr
Apr 18, 3:34 AM MDTLake Wind AdvisoryGGW13 hr
Apr 20, 3:03 AM MDTLake Wind AdvisoryGGW18 hr
Apr 23, 2:56 PM MDTFire Weather WatchGGW13 hr
Apr 24, 4:17 PM MDTLake Wind AdvisoryGGW4 hr
Apr 25, 4:04 AM MDTLake Wind AdvisoryGGW53 hr
Apr 27, 8:50 PM MDTLake Wind AdvisoryGGW23 hr
Apr 30, 2:33 PM MDTLake Wind AdvisoryGGW30 hr
May 5, 4:01 AM MDTLake Wind AdvisoryGGW16 hr
May 5, 2:59 PM MDTHigh Wind WatchGGW13 hr
May 6, 3:56 AM MDTHigh Wind WarningGGW17 hr
May 7, 3:37 AM MDTLake Wind AdvisoryGGW16 hr
May 9, 2:34 PM MDTLake Wind AdvisoryGGW29 hr
May 21, 2:38 PM MDTLake Wind AdvisoryGGW30 hr
May 23, 3:17 AM MDTLake Wind AdvisoryGGW18 hr
May 25, 3:21 PM MDTLake Wind AdvisoryGGW3 days
Jun 2, 9:22 AM MDTMesoscale DiscussionSPC53 min
Jun 2, 12:52 PM MDTMesoscale DiscussionSPC113 min
Jun 2, 2:10 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 2, 6:08 PM MDTMesoscale DiscussionSPC97 min
Jun 2, 7:23 PM MDTSpecial Weather StatementGGW37 min
Jun 2, 7:30 PM MDTSevere Thunderstorm WarningGGW30 min
Jun 2, 7:57 PM MDTSpecial Weather StatementGGW33 min
Jun 2, 8:23 PM MDTSpecial Weather StatementGGW37 min
Jun 4, 2:41 PM MDTLake Wind AdvisoryGGW48 hr
Jun 4, 9:56 PM MDTSpecial Weather StatementGGW49 min
Jun 8, 2:37 PM MDTLake Wind AdvisoryGGW24 hr
Jun 8, 2:52 PM MDTMesoscale DiscussionSPC53 min
Jun 8, 5:07 PM MDTMesoscale DiscussionSPC53 min
Jun 8, 5:41 PM MDTSevere Thunderstorm WatchSPC9 hr
Jun 8, 8:40 PM MDTSevere Thunderstorm WarningGGW35 min
Jun 8, 9:13 PM MDTSevere Thunderstorm WarningGGW47 min
Jun 8, 9:29 PM MDTSpecial Weather StatementGGW46 min
Jun 8, 10:30 PM MDTSpecial Weather StatementGGW30 min
Jun 8, 10:34 PM MDTSevere Thunderstorm WarningGGW26 min
Jun 8, 10:38 PM MDTMesoscale DiscussionSPC67 min
Jun 8, 10:47 PM MDTSevere Thunderstorm WarningGGW43 min
Jun 8, 10:55 PM MDTSevere Thunderstorm WarningGGW50 min
Jun 8, 11:13 PM MDTSevere Thunderstorm WarningGGW47 min
Jun 8, 11:57 PM MDTSevere Thunderstorm WarningGGW48 min
Jun 9, 12:30 AM MDTSevere Thunderstorm WarningGGW60 min
Jun 10, 3:32 AM MDTLake Wind AdvisoryGGW35 hr
Jun 13, 2:19 PM MDTLake Wind AdvisoryGGW27 hr
Jun 16, 2:53 PM MDTLake Wind AdvisoryGGW29 hr
Jun 19, 3:21 AM MDTLake Wind AdvisoryGGW19 hr
Jun 20, 3:36 AM MDTLake Wind AdvisoryGGW17 hr
Jun 21, 2:36 PM MDTLake Wind AdvisoryGGW4 days
Jun 25, 2:40 PM MDTFire Weather WatchGGW13 hr
Jun 25, 3:35 PM MDTMesoscale DiscussionSPC85 min
Jun 25, 4:01 PM MDTSevere Thunderstorm WatchSPC9 hr
Jun 25, 5:34 PM MDTSevere Thunderstorm WarningGGW47 min
Jun 25, 7:12 PM MDTMesoscale DiscussionSPC93 min
Jun 25, 10:27 PM MDTMesoscale DiscussionSPC93 min
Jun 26, 3:55 AM MDTRed Flag WarningGGW18 hr
Jun 26, 4:05 AM MDTLake Wind AdvisoryGGW41 hr
Jul 1, 9:36 AM MDTLake Wind AdvisoryGGW11 hr
Jul 1, 2:40 PM MDTMesoscale DiscussionSPC2 hr
Jul 1, 4:04 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 1, 10:46 PM MDTSevere Thunderstorm WarningGGW59 min
Jul 1, 11:40 PM MDTSevere Thunderstorm WarningGGW65 min
Jul 2, 2:35 PM MDTLake Wind AdvisoryGGW37 hr
Jul 2, 3:05 PM MDTFire Weather WatchGGW12 hr
Jul 3, 3:13 AM MDTRed Flag WarningGGW24 hr
Jul 3, 12:58 PM MDTMesoscale DiscussionSPC92 min
Jul 3, 1:41 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 3:18 PM MDTSevere Thunderstorm WarningGGW42 min
Jul 3, 3:58 PM MDTSevere Thunderstorm WarningGGW32 min
Jul 10, 2:10 PM MDTRed Flag WarningGGW31 hr
Jul 13, 2:59 PM MDTLake Wind AdvisoryGGW36 hr
Jul 13, 3:03 PM MDTRed Flag WarningGGW28 hr
Jul 21, 4:25 PM MDTMesoscale DiscussionSPC65 min
Jul 21, 6:38 PM MDTSevere Thunderstorm WarningGGW52 min
Jul 23, 1:27 PM MDTMesoscale DiscussionSPC3 hr
Jul 23, 7:20 PM MDTSpecial Weather StatementGGW55 min
Jul 23, 8:10 PM MDTSpecial Weather StatementGGW65 min
Jul 23, 9:25 PM MDTAreal Flood AdvisoryGGW3 hr
Jul 25, 3:56 AM MDTLake Wind AdvisoryGGW17 hr
Jul 28, 8:07 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 28, 8:11 PM MDTSevere Thunderstorm WarningGGW64 min
Jul 28, 8:41 PM MDTSpecial Weather StatementGGW64 min
Jul 31, 12:13 AM MDTSevere Thunderstorm WarningGGW31 min
Jul 31, 9:46 PM MDTFire Weather WatchGGW30 hr
Aug 1, 2:31 PM MDTRed Flag WarningGGW32 hr
Aug 2, 11:47 AM MDTSpecial Weather StatementGGW58 min
Aug 2, 12:47 PM MDTSpecial Weather StatementGGW58 min
Aug 2, 2:03 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 2, 3:17 PM MDTLake Wind AdvisoryGGW30 hr
Aug 6, 8:48 PM MDTRed Flag WarningGGW24 hr
Aug 13, 3:29 AM MDTFire Weather WatchGGW24 hr
Aug 13, 4:58 AM MDTSpecial Weather StatementGGW62 min
Aug 13, 5:49 AM MDTSpecial Weather StatementGGW56 min
Aug 13, 6:07 AM MDTSevere Thunderstorm WarningGGW24 min
Aug 13, 6:49 AM MDTSpecial Weather StatementGGW56 min
Aug 13, 11:53 AM MDTMesoscale DiscussionSPC2 hr
Aug 13, 12:25 PM MDTSpecial Weather StatementGGW50 min
Aug 13, 12:31 PM MDTSevere Thunderstorm WarningGGW44 min
Aug 13, 1:09 PM MDTSevere Thunderstorm WarningGGW66 min
Aug 13, 2:05 PM MDTSevere Thunderstorm WarningGGW25 min
Aug 13, 4:47 PM MDTSevere Thunderstorm WarningGGW58 min
Aug 14, 3:12 AM MDTLake Wind AdvisoryGGW41 hr
Aug 14, 3:42 AM MDTRed Flag WarningGGW17 hr
Aug 22, 2:27 PM MDTFire Weather WatchGGW24 hr
Aug 23, 2:31 PM MDTLake Wind AdvisoryGGW33 hr
Aug 23, 2:33 PM MDTRed Flag WarningGGW33 hr
Aug 27, 2:57 AM MDTFire Weather WatchGGW24 hr
Aug 27, 2:57 AM MDTRed Flag WarningGGW18 hr
Aug 28, 3:25 AM MDTRed Flag WarningGGW43 hr
Aug 29, 3:28 AM MDTLake Wind AdvisoryGGW17 hr
Aug 30, 3:00 PM MDTFire Weather WatchGGW12 hr
Aug 31, 2:57 AM MDTRed Flag WarningGGW66 hr
Sep 1, 2:37 PM MDTLake Wind AdvisoryGGW30 hr
Sep 3, 2:41 AM MDTFire Weather WatchGGW12 hr
Sep 3, 2:33 PM MDTRed Flag WarningGGW29 hr
Sep 3, 2:35 PM MDTLake Wind AdvisoryGGW29 hr
Sep 7, 2:28 PM MDTFire Weather WatchGGW48 hr
Sep 8, 2:12 PM MDTRed Flag WarningGGW3 days
Sep 10, 3:13 AM MDTLake Wind AdvisoryGGW42 hr
Sep 12, 3:32 AM MDTRed Flag WarningGGW16 hr
Sep 12, 2:29 PM MDTFire Weather WatchGGW24 hr
Sep 13, 2:16 PM MDTRed Flag WarningGGW30 hr
Sep 19, 2:24 PM MDTLake Wind AdvisoryGGW28 hr
Sep 19, 2:36 PM MDTFire Weather WatchGGW13 hr
Oct 1, 2:40 PM MDTRed Flag WarningGGW24 hr
Oct 1, 2:44 PM MDTLake Wind AdvisoryGGW54 hr
Oct 7, 2:29 PM MDTLake Wind AdvisoryGGW30 hr
Oct 9, 2:33 PM MDTLake Wind AdvisoryGGW30 hr
Oct 14, 2:50 PM MDTHigh Wind WatchGGW24 hr
Oct 14, 10:43 PM MDTLake Wind AdvisoryGGW20 hr
Oct 15, 3:00 PM MDTFire Weather WatchGGW23 hr
Oct 15, 3:07 PM MDTHigh Wind WarningGGW53 hr
Oct 16, 2:28 PM MDTRed Flag WarningGGW12 hr
Oct 18, 3:24 AM MDTLake Wind AdvisoryGGW11 hr
Oct 19, 3:54 AM MDTLake Wind AdvisoryGGW12 hr
Oct 20, 3:21 AM MDTLake Wind AdvisoryGGW16 hr
Oct 22, 3:26 AM MDTLake Wind AdvisoryGGW41 hr
Oct 24, 9:29 AM MDTLake Wind AdvisoryGGW8 hr
Oct 25, 2:38 AM MDTLake Wind AdvisoryGGW15 hr
Oct 30, 12:44 AM MDTDense Fog AdvisoryGGW8 hr
Nov 3, 2:20 PM MDTLake Wind AdvisoryGGW27 hr
Nov 5, 3:09 AM MSTLake Wind AdvisoryGGW10 hr
Nov 5, 1:12 PM MSTHigh Wind WarningGGW5 hr
Nov 5, 3:09 PM MSTWinter Storm WatchGGW48 hr
Nov 6, 3:07 AM MSTLake Wind AdvisoryGGW41 hr
Nov 7, 3:03 PM MSTWinter Storm WarningGGW3 days
Nov 21, 2:40 PM MSTLake Wind AdvisoryGGW28 hr
Nov 29, 7:57 PM MSTDense Fog AdvisoryGGW2 hr
Dec 7, 2:46 PM MSTWinter Weather AdvisoryGGW29 hr
Dec 8, 8:24 AM MSTMesoscale DiscussionSPC4 hr
Dec 13, 6:14 PM MSTDense Fog AdvisoryGGW27 hr
Dec 23, 2:23 PM MSTWinter Weather AdvisoryGGW30 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 archive20112013

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.