Alert archive / Montana / Dawson County

Weather alerts in Dawson County, Montana, 2018

128 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts
128
Warnings
42
Watches
16
Advisories
40
Busiest month
June31 alerts
Busiest day
June 8, 201810 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 reports fell inside a warning.

Dawson County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings010%
Severe thunderstorm warnings252020%1883%30 min
Flash flood warnings330%2100%51 min

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Glasgow, MT: tornado warnings3167%250%16 min
NWS Glasgow, MT: severe thunderstorm warnings1086540%16683%28 min
NWS Glasgow, MT: flash flood warnings6517%967%87 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 5, 3:18 AM MSTDense Fog AdvisoryGGW11 hr
Jan 9, 3:39 AM MSTWinter Weather AdvisoryGGW42 hr
Jan 10, 9:02 AM MSTWind Chill AdvisoryGGW3 days
Jan 10, 9:02 AM MSTWinter Storm WarningGGW10 hr
Jan 11, 3:04 AM MSTWinter Weather AdvisoryGGW27 hr
Jan 12, 3:32 AM MSTWind Chill AdvisoryGGW30 hr
Jan 14, 2:43 AM MSTWind Chill AdvisoryGGW55 hr
Jan 18, 1:34 PM MSTWinter Weather AdvisoryGGW18 hr
Jan 29, 2:39 PM MSTHigh Wind WatchGGW13 hr
Feb 1, 1:45 PM MSTWinter Storm WatchGGW37 hr
Feb 3, 2:37 AM MSTWind Chill AdvisoryGGW32 hr
Feb 3, 2:37 AM MSTWinter Weather AdvisoryGGW24 hr
Feb 5, 3:34 AM MSTWind Chill AdvisoryGGW31 hr
Feb 6, 11:29 AM MSTWinter Storm WatchGGW25 hr
Feb 7, 12:14 PM MSTWinter Weather AdvisoryGGW39 hr
Feb 8, 4:56 PM MSTWind Chill AdvisoryGGW42 hr
Feb 9, 1:31 PM MSTWind Chill WarningGGW21 hr
Feb 10, 10:52 AM MSTWind Chill AdvisoryGGW16 hr
Feb 11, 2:25 PM MSTWind Chill AdvisoryGGW45 hr
Feb 12, 11:48 AM MSTWind Chill AdvisoryGGW21 hr
Feb 16, 3:30 AM MSTWinter Storm WatchGGW24 hr
Feb 17, 3:13 AM MSTWinter Weather AdvisoryGGW32 hr
Feb 19, 2:18 PM MSTWind Chill AdvisoryGGW21 hr
Feb 20, 10:45 AM MSTWind Chill AdvisoryGGW24 hr
Feb 21, 10:42 AM MSTWind Chill AdvisoryGGW24 hr
Feb 22, 9:31 PM MSTWind Chill AdvisoryGGW30 hr
Feb 25, 10:29 AM MSTWinter Weather AdvisoryGGW12 hr
Mar 2, 3:06 AM MSTWinter Storm WatchGGW48 hr
Mar 3, 7:31 AM MSTDense Fog AdvisoryGGW119 min
Mar 3, 2:27 PM MSTWinter Storm WarningGGW57 hr
Mar 5, 9:03 AM MSTBlizzard WarningGGW10 hr
Mar 5, 6:59 PM MSTWinter Weather AdvisoryGGW17 hr
Mar 12, 2:42 PM MDTDense Fog AdvisoryGGW21 hr
Mar 14, 5:28 AM MDTDense Fog AdvisoryGGW7 hr
Mar 17, 9:08 PM MDTDense Fog AdvisoryGGW6 hr
Mar 18, 10:26 AM MDTFlood WatchGGW9 days
Mar 21, 12:36 PM MDTFlash Flood WatchGGW8 hr
Mar 22, 7:14 PM MDTAreal Flood WarningGGW24 hr
Mar 23, 5:28 PM MDTAreal Flood AdvisoryGGW17 hr
Mar 24, 8:02 AM MDTAreal Flood AdvisoryGGW24 hr
Mar 31, 2:21 PM MDTWinter Storm WatchGGW24 hr
Apr 1, 3:09 AM MDTWinter Storm WarningGGW48 hr
Apr 6, 2:28 PM MDTWinter Weather AdvisoryGGW45 hr
Apr 11, 3:28 AM MDTWinter Storm WatchGGW24 hr
Apr 12, 3:08 AM MDTWinter Storm WarningGGW33 hr
Apr 19, 7:13 AM MDTDense Fog AdvisoryGGW4 hr
Apr 28, 2:56 AM MDTRed Flag WarningGGW17 hr
Apr 29, 5:06 PM MDTMesoscale DiscussionSPC2 hr
Apr 29, 6:05 PM MDTSevere Thunderstorm WarningGGW55 min
Apr 29, 6:46 PM MDTSpecial Weather StatementGGW44 min
Apr 29, 7:07 PM MDTAreal Flood WarningGGW3 hr
Apr 29, 7:45 PM MDTSpecial Weather StatementGGW60 min
May 17, 8:29 PM MDTSevere Thunderstorm WarningGGW61 min
May 23, 6:38 PM MDTSevere Thunderstorm WarningGGW37 min
May 23, 6:55 PM MDTSevere Thunderstorm WarningGGW50 min
May 23, 7:18 PM MDTSevere Thunderstorm WarningGGW57 min
May 23, 8:17 PM MDTSevere Thunderstorm WarningGGW29 min
May 26, 2:21 PM MDTMesoscale DiscussionSPC114 min
May 26, 4:46 PM MDTMesoscale DiscussionSPC119 min
May 26, 5:36 PM MDTSevere Thunderstorm WatchSPC9 hr
May 26, 8:38 PM MDTSevere Thunderstorm WarningGGW67 min
May 26, 9:13 PM MDTMesoscale DiscussionSPC2 hr
May 26, 9:14 PM MDTSevere Thunderstorm WarningGGW61 min
May 26, 9:44 PM MDTSevere Thunderstorm WarningGGW61 min
May 26, 10:21 PM MDTFlash Flood WarningGGW4 hr
May 26, 10:44 PM MDTSpecial Weather StatementGGW61 min
May 26, 11:02 PM MDTSevere Thunderstorm WarningGGW58 min
May 27, 12:43 AM MDTAreal Flood AdvisoryGGW3 hr
May 31, 1:47 PM MDTMesoscale DiscussionSPC118 min
Jun 1, 3:14 AM MDTSpecial Weather StatementGGW46 min
Jun 1, 11:03 AM MDTMesoscale DiscussionSPC117 min
Jun 1, 11:45 AM MDTSevere Thunderstorm WatchSPC6 hr
Jun 1, 2:15 PM MDTSevere Thunderstorm WarningGGW60 min
Jun 1, 3:04 PM MDTMesoscale DiscussionSPC86 min
Jun 4, 6:14 PM MDTMesoscale DiscussionSPC3 hr
Jun 6, 11:04 PM MDTSevere Thunderstorm WarningGGW26 min
Jun 7, 10:24 AM MDTMesoscale DiscussionSPC66 min
Jun 7, 1:51 PM MDTMesoscale DiscussionSPC84 min
Jun 7, 5:16 PM MDTMesoscale DiscussionSPC119 min
Jun 7, 6:09 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 7, 6:42 PM MDTSpecial Weather StatementGGW63 min
Jun 7, 7:12 PM MDTSevere Thunderstorm WarningGGW63 min
Jun 7, 7:34 PM MDTAreal Flood AdvisoryGGW2 hr
Jun 7, 7:48 PM MDTSevere Thunderstorm WarningGGW27 min
Jun 7, 7:50 PM MDTFlash Flood WarningGGW3 hr
Jun 7, 8:05 PM MDTSevere Thunderstorm WarningGGW43 min
Jun 7, 8:08 PM MDTSevere Thunderstorm WarningGGW67 min
Jun 7, 8:37 PM MDTFlash Flood WarningGGW3 hr
Jun 7, 8:47 PM MDTSpecial Weather StatementGGW43 min
Jun 8, 8:23 PM MDTSpecial Weather StatementGGW52 min
Jun 28, 1:07 PM MDTFlash Flood WatchGGW9 hr
Jun 28, 2:35 PM MDTMesoscale DiscussionSPC2 hr
Jun 28, 3:42 PM MDTTornado WatchSPC7 hr
Jun 28, 5:59 PM MDTMesoscale DiscussionSPC91 min
Jun 28, 6:31 PM MDTSevere Thunderstorm WarningGGW59 min
Jun 28, 6:54 PM MDTSevere Thunderstorm WarningGGW66 min
Jun 28, 7:05 PM MDTSevere Thunderstorm WarningGGW55 min
Jun 28, 7:33 PM MDTSevere Thunderstorm WarningGGW57 min
Jun 28, 7:44 PM MDTSevere Thunderstorm WarningGGW61 min
Jun 28, 8:06 PM MDTMesoscale DiscussionSPC84 min
Jul 3, 2:49 PM MDTHeat AdvisoryGGW3 days
Jul 3, 7:43 PM MDTSpecial Weather StatementGGW62 min
Jul 3, 7:57 PM MDTSevere Thunderstorm WarningGGW63 min
Jul 3, 8:13 PM MDTMesoscale DiscussionSPC2 hr
Jul 3, 8:37 PM MDTSevere Thunderstorm WarningGGW53 min
Jul 3, 8:39 PM MDTSevere Thunderstorm WatchSPC6 hr
Jul 3, 9:51 PM MDTSpecial Weather StatementGGW54 min
Jul 9, 2:28 PM MDTHeat AdvisoryGGW30 hr
Jul 10, 1:50 PM MDTMesoscale DiscussionSPC115 min
Jul 10, 6:32 PM MDTMesoscale DiscussionSPC118 min
Jul 19, 12:52 AM MDTSpecial Weather StatementGGW53 min
Jul 21, 5:18 PM MDTMesoscale DiscussionSPC87 min
Aug 1, 11:26 AM MDTRed Flag WarningGGW59 hr
Aug 3, 7:12 PM MDTSpecial Weather StatementGGW78 min
Aug 3, 7:23 PM MDTSevere Thunderstorm WarningGGW52 min
Aug 3, 8:27 PM MDTSpecial Weather StatementGGW93 min
Aug 8, 3:09 AM MDTHeat AdvisoryGGW48 hr
Aug 9, 2:46 PM MDTFire Weather WatchGGW48 hr
Aug 9, 3:07 PM MDTExcessive Heat WarningGGW54 hr
Aug 11, 3:31 AM MDTRed Flag WarningGGW19 hr
Aug 11, 2:49 PM MDTRed Flag WarningGGW30 hr
Aug 11, 2:53 PM MDTExcessive Heat WarningGGW30 hr
Aug 23, 6:14 AM MDTSevere Thunderstorm WarningGGW61 min
Nov 15, 3:07 AM MSTWinter Weather AdvisoryGGW38 hr
Nov 29, 3:52 AM MSTDense Fog AdvisoryGGW8 hr
Nov 30, 4:09 AM MSTWinter Weather AdvisoryGGW62 hr
Dec 1, 3:15 PM MSTDense Fog AdvisoryGGW18 hr
Dec 25, 3:01 AM MSTWinter Weather AdvisoryGGW39 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 archive20172019

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.