Alert archive / Montana / Dawson County

Weather alerts in Dawson County, Montana, 2013

129 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Dawson County and its neighbors

Each county as a circle sized by its count in 2013. Tap one for its archive.

Alerts
129
Warnings
45
Watches
18
Advisories
29
Busiest month
July38 alerts
Busiest day
July 8, 20137 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 4 tornado warnings covering Dawson County in 2013 had a tornado report inside them.

Dawson County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings40100%0
Severe thunderstorm warnings281932%2383%27 min
Flash flood warnings2150%1100%10 min

Each office's whole area, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Glasgow, MT: tornado warnings8450%5100%12 min
NWS Glasgow, MT: severe thunderstorm warnings1478443%19676%27 min
NWS Glasgow, MT: flash flood warnings21386%560%36 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
Dec 31, 9:22 PM MSTDense Fog AdvisoryGGW9 hr
Jan 9, 2:41 AM MSTWinter Storm WatchGGW25 hr
Jan 9, 2:45 PM MSTWinter Storm WarningGGW60 hr
Jan 11, 11:20 PM MSTWind Chill AdvisoryGGW12 hr
Jan 14, 2:33 PM MSTWinter Weather AdvisoryGGW23 hr
Jan 19, 3:17 AM MSTWind Chill AdvisoryGGW51 hr
Jan 28, 2:37 PM MSTWind Chill AdvisoryGGW37 hr
Jan 30, 4:08 AM MSTWind Chill WarningGGW30 hr
Feb 2, 8:59 AM MSTWinter Weather AdvisoryGGW8 hr
Feb 17, 3:13 AM MSTWinter Weather AdvisoryGGW23 hr
Mar 3, 4:02 AM MSTWinter Storm WarningGGW40 hr
Mar 3, 4:02 AM MSTWinter Weather AdvisoryGGW34 hr
Mar 15, 9:46 AM MDTDense Fog AdvisoryGGW3 hr
Mar 15, 2:22 PM MDTWinter Storm WatchGGW24 hr
Mar 16, 2:47 PM MDTWinter Storm WarningGGW36 hr
Mar 18, 2:34 AM MDTWind Chill AdvisoryGGW8 hr
Mar 20, 2:33 PM MDTWinter Weather AdvisoryGGW51 hr
Apr 7, 3:16 AM MDTWinter Storm WatchGGW12 hr
Apr 7, 2:44 PM MDTWinter Storm WarningGGW23 hr
Apr 12, 3:34 AM MDTWinter Storm WatchGGW24 hr
Apr 13, 3:37 AM MDTWinter Storm WarningGGW48 hr
Apr 29, 8:03 AM MDTRed Flag WarningGGW13 hr
May 11, 2:18 PM MDTFire Weather WatchGGW37 hr
May 12, 2:08 PM MDTFire Weather WatchGGW25 hr
May 13, 2:46 PM MDTRed Flag WarningGGW28 hr
May 25, 11:43 AM MDTMesoscale DiscussionSPC92 min
May 25, 1:52 PM MDTTornado WatchSPC8 hr
May 25, 3:03 PM MDTSevere Thunderstorm WarningGGW57 min
May 25, 7:12 PM MDTSevere Thunderstorm WarningGGW63 min
May 25, 7:26 PM MDTSevere Thunderstorm WarningGGW64 min
May 25, 7:48 PM MDTMesoscale DiscussionSPC87 min
May 25, 8:02 PM MDTSevere Thunderstorm WarningGGW58 min
May 29, 3:24 AM MDTFlood WatchGGW58 hr
Jun 3, 8:26 PM MDTAreal Flood WarningGGW17 hr
Jun 8, 12:58 AM MDTSpecial Weather StatementGGW62 min
Jun 13, 12:37 PM MDTMesoscale DiscussionSPC53 min
Jun 13, 4:44 PM MDTMesoscale DiscussionSPC61 min
Jun 13, 8:06 PM MDTMesoscale DiscussionSPC54 min
Jun 19, 8:25 PM MDTSevere Thunderstorm WatchSPC8 hr
Jun 19, 10:49 PM MDTMesoscale DiscussionSPC86 min
Jun 20, 12:39 AM MDTSevere Thunderstorm WarningGGW66 min
Jun 20, 12:57 AM MDTMesoscale DiscussionSPC93 min
Jun 20, 1:32 AM MDTSevere Thunderstorm WarningGGW58 min
Jun 21, 7:55 PM MDTSpecial Weather StatementGGW65 min
Jun 24, 1:21 PM MDTMesoscale DiscussionSPC114 min
Jun 24, 6:39 PM MDTMesoscale DiscussionSPC96 min
Jun 24, 7:01 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 24, 9:47 PM MDTMesoscale DiscussionSPC58 min
Jun 25, 1:06 AM MDTMesoscale DiscussionSPC54 min
Jul 3, 3:54 PM MDTMesoscale DiscussionSPC96 min
Jul 5, 2:08 PM MDTSpecial Weather StatementGGW67 min
Jul 5, 2:58 PM MDTFlash Flood WarningGGW3 hr
Jul 8, 1:23 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 8, 4:10 PM MDTSevere Thunderstorm WarningGGW65 min
Jul 8, 4:29 PM MDTSevere Thunderstorm WarningGGW61 min
Jul 8, 4:58 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 5:09 PM MDTSevere Thunderstorm WarningGGW66 min
Jul 8, 5:23 PM MDTSevere Thunderstorm WarningGGW52 min
Jul 8, 5:50 PM MDTFlash Flood WarningGGW3 hr
Jul 8, 6:02 PM MDTSevere Thunderstorm WarningGGW58 min
Jul 8, 7:22 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 8, 8:07 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 11, 2:55 PM MDTMesoscale DiscussionSPC65 min
Jul 11, 3:50 PM MDTSevere Thunderstorm WatchSPC5 hr
Jul 15, 1:51 PM MDTMesoscale DiscussionSPC84 min
Jul 15, 2:48 PM MDTTornado WatchSPC8 hr
Jul 15, 6:27 PM MDTMesoscale DiscussionSPC63 min
Jul 20, 4:44 PM MDTMesoscale DiscussionSPC91 min
Jul 20, 5:58 PM MDTSevere Thunderstorm WarningGGW62 min
Jul 20, 6:40 PM MDTSevere Thunderstorm WarningGGW65 min
Jul 20, 6:57 PM MDTTornado WarningGGW33 min
Jul 20, 7:25 PM MDTTornado WarningGGW35 min
Jul 20, 7:39 PM MDTSevere Thunderstorm WarningGGW51 min
Jul 20, 7:43 PM MDTTornado WarningGGW32 min
Jul 20, 8:29 PM MDTTornado WarningGGW31 min
Jul 24, 1:21 PM MDTMesoscale DiscussionSPC84 min
Jul 24, 5:08 PM MDTSevere Thunderstorm WarningGGW67 min
Jul 24, 5:08 PM MDTMesoscale DiscussionSPC97 min
Jul 24, 5:26 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 6:13 PM MDTSevere Thunderstorm WarningGGW62 min
Jul 24, 6:36 PM MDTSevere Thunderstorm WarningGGW54 min
Jul 24, 7:31 PM MDTSevere Thunderstorm WarningGGW59 min
Jul 24, 7:48 PM MDTMesoscale DiscussionSPC87 min
Jul 24, 8:27 PM MDTSevere Thunderstorm WarningGGW63 min
Jul 24, 11:31 PM MDTMesoscale DiscussionSPC29 min
Jul 28, 3:56 PM MDTMesoscale DiscussionSPC3 hr
Jul 30, 3:37 PM MDTMesoscale DiscussionSPC2 hr
Aug 3, 1:17 PM MDTMesoscale DiscussionSPC118 min
Aug 3, 1:50 PM MDTSevere Thunderstorm WatchSPC9 hr
Aug 3, 5:44 PM MDTMesoscale DiscussionSPC61 min
Aug 3, 7:42 PM MDTSpecial Weather StatementGGW63 min
Aug 3, 8:18 PM MDTAreal Flood AdvisoryGGW3 hr
Aug 5, 4:35 PM MDTSevere Thunderstorm WarningGGW55 min
Aug 5, 4:41 PM MDTSevere Thunderstorm WarningGGW34 min
Aug 5, 5:07 PM MDTMesoscale DiscussionSPC53 min
Aug 5, 5:21 PM MDTSevere Thunderstorm WarningGGW54 min
Aug 10, 2:48 PM MDTMesoscale DiscussionSPC87 min
Aug 13, 2:22 PM MDTMesoscale DiscussionSPC2 hr
Aug 28, 2:54 PM MDTMesoscale DiscussionSPC96 min
Aug 28, 4:23 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 28, 7:52 PM MDTSevere Thunderstorm WarningGGW53 min
Aug 28, 7:55 PM MDTMesoscale DiscussionSPC95 min
Aug 28, 9:09 PM MDTSevere Thunderstorm WarningGGW66 min
Aug 28, 10:32 PM MDTSevere Thunderstorm WarningGGW58 min
Aug 30, 3:47 PM MDTMesoscale DiscussionSPC88 min
Sep 5, 6:41 AM MDTSpecial Weather StatementGGW64 min
Sep 7, 9:07 AM MDTFlash Flood WatchGGW37 hr
Sep 17, 6:29 PM MDTMesoscale DiscussionSPC61 min
Sep 17, 9:21 PM MDTSevere Thunderstorm WarningGGW54 min
Oct 27, 2:16 PM MDTWinter Weather AdvisoryGGW37 hr
Nov 9, 2:47 PM MSTWinter Weather AdvisoryGGW42 hr
Nov 19, 1:59 PM MSTWinter Weather AdvisoryGGW28 hr
Nov 30, 2:01 AM MSTFreezing Rain AdvisoryGGW9 hr
Nov 30, 6:57 PM MSTFreezing Rain AdvisoryGGW13 hr
Dec 1, 2:54 AM MSTWinter Storm WatchGGW24 hr
Dec 2, 3:06 AM MSTWinter Storm WarningGGW49 hr
Dec 3, 9:18 PM MSTWind Chill AdvisoryGGW46 hr
Dec 4, 10:57 AM MSTWind Chill AdvisoryGGW33 hr
Dec 6, 3:07 AM MSTWind Chill AdvisoryGGW40 hr
Dec 7, 11:01 AM MSTWind Chill WarningGGW23 hr
Dec 7, 11:01 AM MSTWind Chill AdvisoryGGW48 hr
Dec 8, 2:15 PM MSTWinter Weather AdvisoryGGW30 hr
Dec 10, 7:48 PM MSTWind Chill AdvisoryGGW16 hr
Dec 18, 3:37 AM MSTWinter Weather AdvisoryGGW34 hr
Dec 20, 2:25 PM MSTWinter Weather AdvisoryGGW30 hr
Dec 22, 2:30 PM MSTWinter Weather AdvisoryGGW36 hr
Dec 27, 3:01 PM MSTWind Chill AdvisoryGGW36 hr
Dec 28, 9:42 AM MSTWinter Weather AdvisoryGGW5 hr
Dec 30, 3:20 AM MSTWinter Weather AdvisoryGGW55 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 archive20122014

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.