Alert archive / Montana / Roosevelt County

Weather alerts in Roosevelt County, Montana, 2012

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

Roosevelt County and its neighbors

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

Alerts
142
Warnings
53
Watches
27
Advisories
33
Busiest month
June32 alerts
Busiest day
June 24, 201215 alerts

Over time

By month

Warning verification

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

Roosevelt County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings262215%2190%39 min
Flash flood warnings10100%10%

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 10, 2:29 PM MSTWind Chill AdvisoryGGW37 hr
Jan 15, 5:16 AM MSTWind Chill AdvisoryGGW28 hr
Jan 17, 12:45 AM MSTWind Chill AdvisoryGGW11 hr
Jan 17, 3:11 PM MSTWind Chill WarningGGW43 hr
Jan 17, 3:11 PM MSTWind Chill AdvisoryGGW54 hr
Jan 25, 3:17 AM MSTFreezing Rain AdvisoryGGW4 hr
Jan 25, 3:32 AM MSTHigh Wind WarningGGW17 hr
Feb 3, 9:03 AM MSTDense Fog AdvisoryGGW26 hr
Feb 10, 3:04 AM MSTWind Chill AdvisoryGGW6 hr
Feb 14, 9:36 AM MSTWinter Weather AdvisoryGGW10 hr
Feb 24, 3:27 PM MSTWinter Weather AdvisoryGGW43 hr
Mar 1, 2:18 AM MSTWinter Weather AdvisoryGGW9 hr
Mar 1, 2:51 PM MSTWinter Weather AdvisoryGGW20 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 20, 3:00 PM MDTFire Weather WatchGGW24 hr
Mar 21, 2:34 PM MDTRed Flag WarningGGW30 hr
Mar 28, 6:24 AM MDTDense Fog AdvisoryGGW5 hr
Mar 29, 4:20 AM MDTFire Weather WatchGGW24 hr
Mar 30, 3:53 AM MDTRed Flag WarningGGW17 hr
Mar 31, 2:41 PM MDTRed Flag WarningGGW30 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, 3:20 PM MDTWinter Weather AdvisoryGGW17 hr
Apr 11, 3:44 AM MDTRed Flag WarningGGW17 hr
Apr 20, 5:23 AM MDTDense Fog AdvisoryGGW5 hr
Apr 23, 2:56 PM MDTFire Weather WatchGGW13 hr
May 4, 11:30 PM MDTDense Fog AdvisoryGGW11 hr
May 5, 1:06 PM MDTSpecial Weather StatementGGW54 min
May 5, 1:37 PM MDTSpecial Weather StatementGGW53 min
May 5, 2:59 PM MDTHigh Wind WatchGGW13 hr
May 6, 3:56 AM MDTHigh Wind WarningGGW17 hr
Jun 2, 2:10 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 8, 5:07 PM MDTMesoscale DiscussionSPC53 min
Jun 8, 5:41 PM MDTSevere Thunderstorm WatchSPC9 hr
Jun 8, 10:38 PM MDTMesoscale DiscussionSPC67 min
Jun 9, 1:11 AM MDTSevere Thunderstorm WarningGGW64 min
Jun 9, 1:43 AM MDTFlash Flood WarningGGW113 min
Jun 9, 1:58 AM MDTSevere Thunderstorm WarningGGW62 min
Jun 9, 2:09 AM MDTSevere Thunderstorm WarningGGW51 min
Jun 13, 6:57 PM MDTSpecial Weather StatementGGW63 min
Jun 13, 7:15 PM MDTSevere Thunderstorm WarningGGW42 min
Jun 18, 3:54 PM MDTSpecial Weather StatementGGW36 min
Jun 18, 4:29 PM MDTSpecial Weather StatementGGW46 min
Jun 24, 3:43 AM MDTSevere Thunderstorm WarningGGW62 min
Jun 24, 3:47 AM MDTMesoscale DiscussionSPC88 min
Jun 24, 5:57 AM MDTSevere Thunderstorm WarningGGW63 min
Jun 24, 6:55 AM MDTSevere Thunderstorm WarningGGW65 min
Jun 24, 7:25 AM MDTSevere Thunderstorm WarningGGW65 min
Jun 24, 8:16 AM MDTMesoscale DiscussionSPC89 min
Jun 24, 8:20 AM MDTSevere Thunderstorm WarningGGW40 min
Jun 24, 8:31 AM MDTSevere Thunderstorm WatchSPC5 hr
Jun 24, 9:02 AM MDTSevere Thunderstorm WarningGGW58 min
Jun 24, 10:08 AM MDTSpecial Weather StatementGGW52 min
Jun 24, 10:47 AM MDTSpecial Weather StatementGGW43 min
Jun 24, 10:51 AM MDTAreal Flood AdvisoryGGW7 hr
Jun 24, 10:57 AM MDTSevere Thunderstorm WarningGGW33 min
Jun 24, 11:24 AM MDTMesoscale DiscussionSPC2 hr
Jun 24, 11:27 AM MDTSevere Thunderstorm WarningGGW63 min
Jun 25, 4:01 PM MDTSevere Thunderstorm WatchSPC9 hr
Jun 25, 7:12 PM MDTMesoscale DiscussionSPC93 min
Jun 26, 2:06 PM MDTMesoscale DiscussionSPC54 min
Jun 26, 5:55 PM MDTHigh Wind WarningGGW2 hr
Jun 26, 7:55 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 1, 2:40 PM MDTMesoscale DiscussionSPC2 hr
Jul 1, 4:04 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 1, 6:02 PM MDTSpecial Weather StatementGGW58 min
Jul 1, 6:35 PM MDTMesoscale DiscussionSPC115 min
Jul 1, 11:40 PM MDTSevere Thunderstorm WarningGGW65 min
Jul 2, 12:23 AM MDTMesoscale DiscussionSPC97 min
Jul 2, 12:43 AM MDTSevere Thunderstorm WarningGGW62 min
Jul 3, 12:58 PM MDTMesoscale DiscussionSPC92 min
Jul 3, 1:41 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 3:58 PM MDTSevere Thunderstorm WarningGGW32 min
Jul 3, 4:25 PM MDTSevere Thunderstorm WarningGGW65 min
Jul 3, 4:29 PM MDTSevere Thunderstorm WarningGGW61 min
Jul 3, 5:15 PM MDTMesoscale DiscussionSPC2 hr
Jul 3, 5:26 PM MDTSevere Thunderstorm WarningGGW64 min
Jul 3, 6:23 PM MDTSevere Thunderstorm WarningGGW52 min
Jul 3, 7:36 PM MDTSevere Thunderstorm WarningGGW54 min
Jul 11, 4:36 PM MDTMesoscale DiscussionSPC54 min
Jul 11, 4:43 PM MDTSevere Thunderstorm WarningGGW62 min
Jul 11, 9:54 PM MDTAreal Flood AdvisoryGGW8 hr
Jul 14, 7:02 PM MDTSpecial Weather StatementGGW58 min
Jul 21, 4:25 PM MDTMesoscale DiscussionSPC65 min
Jul 21, 4:41 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 21, 5:44 PM MDTSevere Thunderstorm WarningGGW61 min
Jul 23, 10:30 PM MDTSpecial Weather StatementGGW60 min
Jul 28, 2:56 PM MDTMesoscale DiscussionSPC64 min
Jul 28, 8:11 PM MDTSevere Thunderstorm WarningGGW64 min
Jul 28, 8:55 PM MDTSpecial Weather StatementGGW65 min
Jul 31, 9:46 PM MDTFire Weather WatchGGW30 hr
Aug 1, 2:09 PM MDTMesoscale DiscussionSPC66 min
Aug 1, 3:25 PM MDTSevere Thunderstorm WarningGGW65 min
Aug 1, 4:26 PM MDTSevere Thunderstorm WarningGGW49 min
Aug 2, 1:44 PM MDTMesoscale DiscussionSPC31 min
Aug 2, 2:03 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 2, 6:10 PM MDTMesoscale DiscussionSPC95 min
Aug 22, 2:27 PM MDTFire Weather WatchGGW24 hr
Aug 23, 2:33 PM MDTRed Flag WarningGGW33 hr
Aug 25, 3:20 AM MDTRed Flag WarningGGW18 hr
Aug 27, 2:57 AM MDTFire Weather WatchGGW24 hr
Aug 28, 3:25 AM MDTRed Flag WarningGGW43 hr
Aug 30, 3:00 PM MDTFire Weather WatchGGW12 hr
Aug 31, 2:57 AM MDTRed Flag WarningGGW66 hr
Sep 3, 2:41 AM MDTFire Weather WatchGGW12 hr
Sep 7, 2:28 PM MDTFire Weather WatchGGW48 hr
Sep 8, 2:12 PM MDTRed Flag WarningGGW3 days
Sep 12, 3:32 AM MDTRed Flag WarningGGW16 hr
Sep 12, 2:29 PM MDTFire Weather WatchGGW24 hr
Sep 13, 3:58 AM MDTRed Flag WarningGGW16 hr
Sep 13, 2:16 PM MDTRed Flag WarningGGW30 hr
Sep 18, 3:03 AM MDTRed Flag WarningGGW18 hr
Sep 18, 2:32 PM MDTFire Weather WatchGGW12 hr
Sep 19, 2:56 AM MDTRed Flag WarningGGW16 hr
Oct 15, 3:00 PM MDTFire Weather WatchGGW23 hr
Oct 15, 3:07 PM MDTHigh Wind WatchGGW12 hr
Oct 15, 3:07 PM MDTHigh Wind WarningGGW53 hr
Oct 16, 2:28 PM MDTRed Flag WarningGGW12 hr
Oct 30, 12:44 AM MDTDense Fog AdvisoryGGW8 hr
Nov 4, 10:16 PM MSTDense Fog AdvisoryGGW10 hr
Nov 5, 3:09 PM MSTWinter Storm WatchGGW48 hr
Nov 7, 3:03 PM MSTBlizzard WarningGGW48 hr
Nov 7, 3:03 PM MSTWinter Storm WarningGGW3 days
Nov 11, 1:48 PM MSTWind Chill AdvisoryGGW14 hr
Nov 14, 3:23 AM MSTDense Fog AdvisoryGGW5 hr
Nov 21, 3:24 AM MSTWinter Weather AdvisoryGGW30 hr
Nov 24, 5:03 AM MSTFreezing Rain AdvisoryGGW4 hr
Nov 26, 10:34 PM MSTDense Fog AdvisoryGGW9 hr
Nov 27, 8:36 PM MSTDense Fog AdvisoryGGW7 hr
Nov 29, 7:57 PM MSTDense Fog AdvisoryGGW2 hr
Nov 30, 4:59 PM MSTFreezing Rain AdvisoryGGW6 hr
Dec 1, 3:16 PM MSTDense Fog AdvisoryGGW15 hr
Dec 7, 2:46 PM MSTWinter Weather AdvisoryGGW29 hr
Dec 13, 6:14 PM MSTDense Fog AdvisoryGGW27 hr
Dec 15, 10:50 AM MSTDense Fog AdvisoryGGW24 hr
Dec 16, 11:02 AM MSTDense Fog AdvisoryGGW2 hr
Dec 25, 2:00 PM MSTWind Chill AdvisoryGGW21 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.