Alert archive / Montana / Garfield County

Weather alerts in Garfield County, Montana, 2011

243 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts
243
Warnings
74
Watches
35
Advisories
109
Busiest month
July52 alerts
Busiest day
July 26, 201112 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Garfield County in 2011 had a tornado report inside them.

Garfield County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings361558%1385%24 min
Flash flood warnings5420%1100%0 min

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Glasgow, MT: tornado warnings12375%2100%22 min
NWS Glasgow, MT: severe thunderstorm warnings1738153%17078%27 min
NWS Glasgow, MT: flash flood warnings291066%2572%93 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 2, 11:13 AM MSTWinter Weather AdvisoryGGW17 hr
Jan 6, 3:05 PM MSTWinter Storm WatchGGW24 hr
Jan 7, 3:20 PM MSTWinter Weather AdvisoryGGW43 hr
Jan 7, 9:17 PM MSTWinter Storm WarningGGW30 hr
Jan 9, 3:00 PM MSTWind Chill AdvisoryGGW19 hr
Jan 10, 3:13 PM MSTWind Chill AdvisoryGGW18 hr
Jan 10, 7:54 PM MSTWinter Weather AdvisoryGGW7 hr
Jan 14, 3:49 AM MSTWinter Weather AdvisoryGGW24 hr
Jan 16, 3:17 AM MSTFreezing Rain AdvisoryGGW23 hr
Jan 17, 7:24 PM MSTWinter Weather AdvisoryGGW17 hr
Jan 19, 3:04 PM MSTWind Chill AdvisoryGGW12 hr
Jan 20, 3:07 PM MSTWinter Storm WatchGGW13 hr
Jan 21, 3:56 AM MSTWinter Weather AdvisoryGGW32 hr
Jan 22, 7:40 AM MSTBlizzard WarningGGW4 hr
Jan 22, 10:06 AM MSTWinter Weather AdvisoryGGW3 hr
Jan 28, 2:07 PM MSTAreal Flood AdvisoryGGW52 hr
Jan 29, 12:33 AM MSTWinter Weather AdvisoryGGW6 hr
Jan 29, 9:26 AM MSTWinter Weather AdvisoryGGW36 hr
Jan 30, 2:32 PM MSTWind Chill AdvisoryGGW44 hr
Jan 31, 2:53 PM MSTWind Chill WarningGGW20 hr
Feb 1, 11:11 AM MSTWind Chill AdvisoryGGW24 hr
Feb 1, 8:50 PM MSTWind Chill WarningGGW14 hr
Feb 4, 2:30 PM MSTWinter Weather AdvisoryGGW29 hr
Feb 5, 8:42 PM MSTWinter Storm WatchGGW19 hr
Feb 6, 3:21 PM MSTWinter Weather AdvisoryGGW26 hr
Feb 6, 3:53 PM MSTAreal Flood AdvisoryGGW30 hr
Feb 7, 2:57 PM MSTWind Chill WarningGGW19 hr
Feb 8, 2:28 PM MSTWind Chill AdvisoryGGW20 hr
Feb 11, 2:56 PM MSTHigh Wind WarningGGW47 hr
Feb 12, 3:00 PM MSTHigh Wind WatchGGW12 hr
Feb 13, 12:12 AM MSTAreal Flood AdvisoryGGW36 hr
Feb 14, 11:36 AM MSTAreal Flood AdvisoryGGW4 hr
Feb 14, 2:49 PM MSTAreal Flood WarningGGW5 days
Feb 15, 2:22 PM MSTWinter Storm WatchGGW25 hr
Feb 16, 3:16 PM MSTWinter Weather AdvisoryGGW23 hr
Feb 17, 5:47 PM MSTWind Chill AdvisoryGGW17 hr
Feb 18, 2:29 PM MSTWinter Storm WatchGGW24 hr
Feb 19, 1:12 PM MSTAreal Flood AdvisoryGGW54 hr
Feb 19, 2:30 PM MSTWinter Weather AdvisoryGGW31 hr
Feb 20, 3:19 PM MSTWind Chill AdvisoryGGW6 hr
Feb 23, 3:23 AM MSTWind Chill AdvisoryGGW57 hr
Feb 25, 2:31 PM MSTWind Chill AdvisoryGGW22 hr
Feb 28, 2:53 PM MSTWinter Weather AdvisoryGGW20 hr
Mar 1, 11:00 AM MSTWind Chill AdvisoryGGW27 hr
Mar 11, 7:11 PM MSTAreal Flood AdvisoryGGW19 hr
Mar 12, 2:37 PM MSTAreal Flood WarningGGW8 days
Mar 16, 8:17 AM MDTAreal Flood WarningGGW5 days
Mar 17, 3:10 PM MDTFlash Flood WarningGGW6 hr
Mar 21, 8:15 AM MDTAreal Flood WarningGGW4 hr
Mar 21, 12:40 PM MDTAreal Flood AdvisoryGGW21 hr
Mar 21, 3:50 PM MDTWinter Weather AdvisoryGGW46 hr
Apr 1, 3:50 AM MDTWinter Storm WatchGGW24 hr
Apr 2, 3:26 AM MDTWinter Weather AdvisoryGGW34 hr
Apr 7, 3:40 AM MDTWinter Weather AdvisoryGGW35 hr
Apr 17, 3:09 PM MDTWinter Storm WatchGGW24 hr
Apr 18, 3:03 PM MDTWinter Weather AdvisoryGGW29 hr
Apr 22, 4:07 AM MDTWinter Weather AdvisoryGGW11 hr
Apr 29, 2:39 PM MDTLake Wind AdvisoryGGW29 hr
Apr 30, 10:34 AM MDTHigh Wind WarningGGW7 hr
May 3, 11:42 AM MDTLake Wind AdvisoryGGW15 hr
May 4, 3:43 AM MDTLake Wind AdvisoryGGW17 hr
May 5, 2:24 PM MDTLake Wind AdvisoryGGW29 hr
May 8, 2:53 PM MDTLake Wind AdvisoryGGW53 hr
May 9, 8:39 PM MDTFlood WatchGGW23 hr
May 10, 3:24 AM MDTAreal Flood WarningGGW6 hr
May 10, 8:31 AM MDTAreal Flood AdvisoryGGW23 hr
May 10, 9:08 AM MDTAreal Flood WarningGGW24 hr
May 10, 12:04 PM MDTAreal Flood WarningGGW12 hr
May 11, 8:09 AM MDTAreal Flood WarningGGW70 hr
May 14, 4:00 AM MDTHigh Wind WatchGGW24 hr
May 14, 4:00 AM MDTLake Wind AdvisoryGGW62 hr
May 14, 5:55 AM MDTAreal Flood AdvisoryGGW50 hr
May 17, 9:01 AM MDTFlood WatchGGW3 hr
May 17, 11:53 AM MDTAreal Flood WarningGGW48 hr
May 18, 2:47 PM MDTFlood WatchGGW44 hr
May 19, 8:19 PM MDTLake Wind AdvisoryGGW27 hr
May 20, 10:06 AM MDTAreal Flood WarningGGW67 hr
May 21, 4:00 AM MDTLake Wind AdvisoryGGW17 hr
May 23, 4:16 AM MDTAreal Flood WarningGGW36 days
May 23, 2:41 PM MDTLake Wind AdvisoryGGW29 hr
May 25, 3:30 AM MDTLake Wind AdvisoryGGW39 hr
May 27, 2:29 AM MDTLake Wind AdvisoryGGW18 hr
May 27, 3:24 AM MDTFlood WatchGGW4 days
May 28, 3:37 AM MDTLake Wind AdvisoryGGW16 hr
May 29, 3:04 AM MDTLake Wind AdvisoryGGW42 hr
May 30, 9:17 PM MDTLake Wind AdvisoryGGW17 hr
Jun 1, 3:38 AM MDTLake Wind AdvisoryGGW23 hr
Jun 2, 9:34 AM MDTLake Wind AdvisoryGGW35 hr
Jun 2, 1:54 PM MDTMesoscale DiscussionSPC66 min
Jun 2, 2:09 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 2, 2:16 PM MDTSevere Thunderstorm WarningGGW59 min
Jun 2, 2:20 PM MDTSevere Thunderstorm WarningGGW43 min
Jun 2, 2:55 PM MDTSpecial Weather StatementGGW65 min
Jun 2, 3:50 PM MDTSevere Thunderstorm WarningGGW25 min
Jun 2, 4:08 PM MDTSevere Thunderstorm WarningGGW52 min
Jun 6, 3:14 AM MDTLake Wind AdvisoryGGW43 hr
Jun 6, 5:46 PM MDTTornado WatchSPC7 hr
Jun 6, 8:25 PM MDTMesoscale DiscussionSPC95 min
Jun 6, 10:25 PM MDTMesoscale DiscussionSPC95 min
Jun 7, 12:13 AM MDTSpecial Weather StatementGGW47 min
Jun 7, 9:22 AM MDTFlash Flood WarningGGW3 hr
Jun 7, 11:51 AM MDTFlash Flood WarningGGW9 hr
Jun 9, 10:02 AM MDTLake Wind AdvisoryGGW11 hr
Jun 11, 12:55 PM MDTSevere Thunderstorm WarningGGW55 min
Jun 11, 6:53 PM MDTSpecial Weather StatementGGW67 min
Jun 13, 2:35 PM MDTFlash Flood WatchGGW21 hr
Jun 14, 12:00 PM MDTLake Wind AdvisoryGGW7 hr
Jun 16, 3:37 AM MDTFlash Flood WatchGGW40 hr
Jun 17, 10:26 AM MDTLake Wind AdvisoryGGW10 hr
Jun 23, 4:01 AM MDTLake Wind AdvisoryGGW20 hr
Jun 23, 2:57 PM MDTFlash Flood WatchGGW13 hr
Jun 23, 8:00 PM MDTSevere Thunderstorm WarningGGW60 min
Jun 23, 9:29 PM MDTSevere Thunderstorm WarningGGW61 min
Jun 29, 3:46 PM MDTSevere Thunderstorm WatchSPC5 hr
Jun 29, 6:17 PM MDTMesoscale DiscussionSPC118 min
Jul 2, 6:45 PM MDTSevere Thunderstorm WarningGGW60 min
Jul 2, 7:40 PM MDTSevere Thunderstorm WarningGGW45 min
Jul 3, 12:31 PM MDTMesoscale DiscussionSPC2 hr
Jul 3, 4:08 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 6:29 PM MDTMesoscale DiscussionSPC2 hr
Jul 3, 8:02 PM MDTMesoscale DiscussionSPC58 min
Jul 5, 5:36 PM MDTSevere Thunderstorm WarningGGW54 min
Jul 5, 6:23 PM MDTSevere Thunderstorm WarningGGW52 min
Jul 5, 7:15 PM MDTSevere Thunderstorm WarningGGW60 min
Jul 5, 8:02 PM MDTSevere Thunderstorm WarningGGW58 min
Jul 7, 9:59 AM MDTMesoscale DiscussionSPC91 min
Jul 7, 10:27 AM MDTSevere Thunderstorm WarningGGW40 min
Jul 8, 2:46 AM MDTLake Wind AdvisoryGGW13 hr
Jul 8, 7:16 PM MDTSevere Thunderstorm WarningGGW59 min
Jul 8, 8:15 PM MDTSevere Thunderstorm WarningGGW60 min
Jul 9, 3:10 AM MDTLake Wind AdvisoryGGW17 hr
Jul 11, 3:50 AM MDTLake Wind AdvisoryGGW53 hr
Jul 13, 8:44 PM MDTSpecial Weather StatementGGW31 min
Jul 14, 1:56 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 14, 5:52 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 14, 6:33 PM MDTMesoscale DiscussionSPC57 min
Jul 14, 6:43 PM MDTSevere Thunderstorm WarningGGW62 min
Jul 14, 7:19 PM MDTFlash Flood WarningGGW3 hr
Jul 14, 7:58 PM MDTSevere Thunderstorm WarningGGW62 min
Jul 15, 6:26 PM MDTMesoscale DiscussionSPC64 min
Jul 15, 6:36 PM MDTSevere Thunderstorm WarningGGW54 min
Jul 16, 4:14 PM MDTMesoscale DiscussionSPC61 min
Jul 16, 7:53 PM MDTSevere Thunderstorm WarningGGW67 min
Jul 16, 8:52 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 19, 3:18 PM MDTLake Wind AdvisoryGGW27 hr
Jul 22, 1:06 PM MDTMesoscale DiscussionSPC24 min
Jul 22, 1:25 PM MDTTornado WatchSPC8 hr
Jul 22, 3:12 PM MDTSevere Thunderstorm WarningGGW63 min
Jul 22, 3:30 PM MDTSevere Thunderstorm WarningGGW60 min
Jul 22, 4:17 PM MDTMesoscale DiscussionSPC88 min
Jul 22, 4:23 PM MDTSevere Thunderstorm WarningGGW67 min
Jul 22, 5:07 PM MDTFlash Flood WarningGGW2 hr
Jul 25, 5:15 PM MDTMesoscale DiscussionSPC2 hr
Jul 25, 5:47 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 25, 7:37 PM MDTSevere Thunderstorm WarningGGW68 min
Jul 25, 8:00 PM MDTSevere Thunderstorm WarningGGW60 min
Jul 25, 8:51 PM MDTTornado WarningGGW24 min
Jul 25, 9:11 PM MDTSevere Thunderstorm WarningGGW64 min
Jul 25, 11:45 PM MDTSpecial Weather StatementGGW60 min
Jul 26, 1:07 PM MDTMesoscale DiscussionSPC53 min
Jul 26, 2:18 PM MDTSevere Thunderstorm WarningGGW57 min
Jul 26, 2:43 PM MDTSevere Thunderstorm WatchSPC5 hr
Jul 26, 3:11 PM MDTSevere Thunderstorm WarningGGW36 min
Jul 26, 3:54 PM MDTSevere Thunderstorm WarningGGW66 min
Jul 26, 4:56 PM MDTSevere Thunderstorm WarningGGW64 min
Jul 26, 5:53 PM MDTSevere Thunderstorm WarningGGW37 min
Jul 26, 6:12 PM MDTSevere Thunderstorm WarningGGW48 min
Aug 4, 2:24 PM MDTMesoscale DiscussionSPC96 min
Aug 4, 7:36 PM MDTFlash Flood WatchGGW24 hr
Aug 5, 6:09 AM MDTLake Wind AdvisoryGGW8 hr
Aug 8, 11:32 AM MDTLake Wind AdvisoryGGW8 hr
Aug 11, 3:16 PM MDTSevere Thunderstorm WarningGGW59 min
Aug 11, 3:40 PM MDTMesoscale DiscussionSPC95 min
Aug 15, 3:11 PM MDTLake Wind AdvisoryGGW23 hr
Aug 17, 3:00 PM MDTLake Wind AdvisoryGGW26 hr
Aug 21, 3:39 AM MDTFire Weather WatchGGW23 hr
Aug 21, 7:38 PM MDTSpecial Weather StatementGGW67 min
Aug 22, 2:53 AM MDTRed Flag WarningGGW17 hr
Aug 22, 2:35 PM MDTLake Wind AdvisoryGGW30 hr
Aug 23, 2:48 AM MDTRed Flag WarningGGW18 hr
Aug 24, 2:11 PM MDTFire Weather WatchGGW13 hr
Aug 25, 3:35 AM MDTRed Flag WarningGGW17 hr
Aug 25, 3:36 AM MDTLake Wind AdvisoryGGW17 hr
Aug 29, 3:10 AM MDTLake Wind AdvisoryGGW16 hr
Aug 29, 2:34 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 31, 3:33 AM MDTLake Wind AdvisoryGGW32 hr
Aug 31, 2:20 PM MDTMesoscale DiscussionSPC115 min
Aug 31, 6:53 PM MDTSevere Thunderstorm WarningGGW67 min
Sep 1, 2:38 PM MDTLake Wind AdvisoryGGW37 hr
Sep 6, 3:05 AM MDTRed Flag WarningGGW17 hr
Sep 11, 3:00 AM MDTLake Wind AdvisoryGGW31 hr
Sep 11, 3:03 AM MDTRed Flag WarningGGW18 hr
Sep 14, 3:03 PM MDTLake Wind AdvisoryGGW36 hr
Sep 18, 3:26 AM MDTLake Wind AdvisoryGGW15 hr
Sep 18, 6:25 PM MDTLake Wind AdvisoryGGW33 hr
Sep 19, 1:15 PM MDTMesoscale DiscussionSPC2 hr
Sep 20, 3:46 AM MDTLake Wind AdvisoryGGW6 hr
Sep 22, 2:25 PM MDTFire Weather WatchGGW12 hr
Sep 23, 2:53 AM MDTRed Flag WarningGGW17 hr
Sep 24, 2:54 PM MDTFire Weather WatchGGW12 hr
Sep 25, 3:21 AM MDTRed Flag WarningGGW17 hr
Sep 25, 2:42 PM MDTLake Wind AdvisoryGGW27 hr
Sep 27, 2:27 PM MDTLake Wind AdvisoryGGW30 hr
Sep 27, 2:49 PM MDTRed Flag WarningGGW29 hr
Sep 30, 2:19 PM MDTFire Weather WatchGGW13 hr
Oct 1, 3:41 AM MDTRed Flag WarningGGW23 hr
Oct 3, 2:42 PM MDTRed Flag WarningGGW29 hr
Oct 3, 3:05 PM MDTLake Wind AdvisoryGGW27 hr
Oct 6, 2:57 PM MDTHigh Wind WatchGGW13 hr
Oct 7, 4:23 AM MDTHigh Wind WarningGGW13 hr
Oct 7, 5:10 PM MDTLake Wind AdvisoryGGW10 hr
Oct 11, 2:54 PM MDTLake Wind AdvisoryGGW29 hr
Oct 13, 2:08 AM MDTLake Wind AdvisoryGGW16 hr
Oct 21, 2:26 PM MDTLake Wind AdvisoryGGW27 hr
Oct 23, 3:02 AM MDTLake Wind AdvisoryGGW16 hr
Oct 26, 2:36 PM MDTLake Wind AdvisoryGGW24 hr
Oct 28, 2:19 PM MDTLake Wind AdvisoryGGW29 hr
Oct 31, 2:27 PM MDTLake Wind AdvisoryGGW5 hr
Nov 2, 3:37 AM MDTLake Wind AdvisoryGGW15 hr
Nov 2, 10:59 PM MDTLake Wind AdvisoryGGW13 hr
Nov 5, 3:41 AM MDTWinter Weather AdvisoryGGW38 hr
Nov 6, 8:53 AM MSTLake Wind AdvisoryGGW8 hr
Nov 8, 1:23 PM MSTLake Wind AdvisoryGGW4 hr
Nov 11, 2:33 PM MSTLake Wind AdvisoryGGW27 hr
Nov 13, 3:45 AM MSTLake Wind AdvisoryGGW14 hr
Nov 14, 3:32 AM MSTLake Wind AdvisoryGGW11 hr
Nov 15, 3:30 AM MSTLake Wind AdvisoryGGW14 hr
Nov 17, 2:54 AM MSTLake Wind AdvisoryGGW20 hr
Nov 18, 4:02 AM MSTLake Wind AdvisoryGGW15 hr
Nov 18, 3:03 PM MSTWinter Weather AdvisoryGGW24 hr
Nov 23, 10:06 AM MSTLake Wind AdvisoryGGW8 hr
Nov 25, 2:44 AM MSTLake Wind AdvisoryGGW31 hr
Nov 26, 2:53 PM MSTLake Wind AdvisoryGGW30 hr
Nov 26, 2:56 PM MSTFire Weather WatchGGW12 hr
Nov 27, 3:15 AM MSTRed Flag WarningGGW17 hr
Nov 29, 2:33 PM MSTWinter Weather AdvisoryGGW37 hr
Dec 3, 3:18 AM MSTWinter Weather AdvisoryGGW38 hr
Dec 12, 9:27 PM MSTDense Fog AdvisoryGGW35 hr
Dec 21, 1:49 AM MSTWinter Weather AdvisoryGGW13 hr
Dec 26, 2:41 AM MSTHigh Wind WarningGGW12 hr
Dec 28, 3:38 AM MSTHigh Wind WatchGGW24 hr
Dec 29, 4:05 AM MSTHigh Wind WarningGGW19 hr
Dec 30, 3:23 AM MSTHigh Wind WatchGGW23 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.