Alert archive / Montana / Park County

Weather alerts in Park County, Montana, 2020

126 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Park County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
126
Warnings
30
Watches
23
Advisories
44
Busiest month
August21 alerts
Busiest day
July 7, 20203 alerts

Over time

By month

Warning verification

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

Park County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings220%825%4 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: severe thunderstorm warnings714142%14355%29 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, 12:29 PM MSTHigh Wind WatchBYZ23 hr
Jan 3, 2:58 AM MSTWind AdvisoryBYZ42 hr
Jan 5, 3:19 AM MSTHigh Wind WatchBYZ12 hr
Jan 5, 3:21 PM MSTWind AdvisoryBYZ43 hr
Jan 9, 2:34 AM MSTWinter Weather AdvisoryBYZ29 hr
Jan 10, 4:05 AM MSTWind AdvisoryBYZ29 hr
Jan 30, 2:21 PM MSTHigh Wind WarningBYZ61 hr
Jan 31, 12:27 PM MSTWinter Storm WatchBYZ26 hr
Feb 1, 2:15 PM MSTWinter Storm WarningBYZ56 hr
Feb 1, 2:15 PM MSTWinter Weather AdvisoryBYZ49 hr
Feb 3, 3:26 PM MSTWinter Storm WatchBYZ43 hr
Feb 3, 3:27 PM MSTWind AdvisoryBYZ48 hr
Feb 5, 3:38 AM MSTWinter Storm WarningBYZ4 days
Feb 5, 10:05 AM MSTWinter Weather AdvisoryBYZ52 hr
Feb 8, 7:36 AM MSTSpecial Weather StatementBYZ39 min
Feb 10, 3:08 PM MSTWind AdvisoryBYZ29 hr
Feb 13, 2:20 AM MSTWind AdvisoryBYZ31 hr
Feb 13, 7:23 PM MSTSpecial Weather StatementBYZ82 min
Feb 14, 2:17 PM MSTWinter Storm WatchBYZ23 hr
Feb 15, 1:18 PM MSTWinter Storm WarningBYZ39 hr
Feb 15, 1:18 PM MSTWinter Weather AdvisoryBYZ45 hr
Feb 23, 8:12 PM MSTSpecial Weather StatementBYZ63 min
Feb 23, 9:17 PM MSTSpecial Weather StatementBYZ88 min
Mar 2, 3:08 AM MSTWind AdvisoryBYZ65 hr
Mar 10, 3:31 AM MDTWind AdvisoryBYZ32 hr
Mar 12, 2:57 PM MDTWinter Storm WarningBYZ3 days
Mar 12, 2:57 PM MDTWinter Weather AdvisoryBYZ3 days
Mar 13, 3:07 AM MDTWinter Storm WatchBYZ23 hr
Mar 23, 1:15 PM MDTWinter Weather AdvisoryBYZ44 hr
Mar 30, 2:39 PM MDTWinter Storm WarningBYZ69 hr
Mar 31, 3:23 AM MDTWinter Weather AdvisoryBYZ61 hr
Apr 9, 3:21 AM MDTWinter Storm WatchBYZ24 hr
Apr 10, 3:01 AM MDTWinter Storm WarningBYZ56 hr
Apr 10, 3:01 AM MDTWinter Weather AdvisoryBYZ56 hr
Apr 14, 3:10 AM MDTWinter Storm WarningBYZ45 hr
Apr 14, 3:10 AM MDTWinter Weather AdvisoryBYZ45 hr
May 5, 2:45 PM MDTHigh Wind WatchBYZ20 hr
May 6, 3:46 AM MDTHigh Wind WarningBYZ35 hr
May 6, 3:46 AM MDTWind AdvisoryBYZ32 hr
May 19, 2:34 PM MDTSevere Thunderstorm WatchSPC7 hr
May 22, 1:32 PM MDTWinter Weather AdvisoryBYZ46 hr
May 29, 7:44 PM MDTSpecial Weather StatementBYZ46 min
May 30, 1:45 PM MDTMesoscale DiscussionSPC90 min
Jun 1, 9:12 AM MDTRiver Flood WarningBYZ21 days
Jun 7, 3:04 AM MDTWinter Weather AdvisoryBYZ41 hr
Jun 12, 2:49 PM MDTWind AdvisoryBYZ31 hr
Jun 16, 2:47 AM MDTWinter Weather AdvisoryBYZ49 hr
Jun 24, 2:29 PM MDTMesoscale DiscussionSPC2 hr
Jun 24, 7:30 PM MDTSpecial Weather StatementBYZ75 min
Jul 1, 3:09 PM MDTSpecial Weather StatementBYZ3 hr
Jul 7, 1:14 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 7, 1:44 PM MDTSevere Thunderstorm WarningBYZ61 min
Jul 7, 3:38 PM MDTSpecial Weather StatementBYZ52 min
Jul 9, 7:17 PM MDTSpecial Weather StatementBYZ43 min
Jul 17, 2:41 PM MDTMesoscale DiscussionSPC2 hr
Jul 23, 2:43 PM MDTSevere Thunderstorm WatchSPC4 hr
Jul 23, 3:35 PM MDTSpecial Weather StatementBYZ55 min
Jul 23, 4:31 PM MDTSpecial Weather StatementBYZ59 min
Aug 3, 4:34 PM MDTSpecial Weather StatementBYZ116 min
Aug 3, 5:36 PM MDTMesoscale DiscussionSPC114 min
Aug 3, 6:32 PM MDTSpecial Weather StatementBYZ58 min
Aug 3, 6:54 PM MDTSevere Thunderstorm WarningBYZ36 min
Aug 3, 7:30 PM MDTSpecial Weather StatementBYZ60 min
Aug 6, 1:09 PM MDTSpecial Weather StatementBYZ36 min
Aug 6, 1:53 PM MDTMesoscale DiscussionSPC2 hr
Aug 10, 1:56 PM MDTFire Weather WatchBYZ24 hr
Aug 11, 1:49 PM MDTRed Flag WarningBYZ31 hr
Aug 17, 2:11 PM MDTRed Flag WarningBYZ30 hr
Aug 19, 7:05 PM MDTSpecial Weather StatementBYZ40 min
Aug 20, 4:49 PM MDTSpecial Weather StatementBYZ41 min
Aug 20, 6:15 PM MDTSpecial Weather StatementBYZ30 min
Aug 20, 6:53 PM MDTSpecial Weather StatementBYZ52 min
Aug 25, 5:48 PM MDTMesoscale DiscussionSPC117 min
Aug 26, 2:44 PM MDTMesoscale DiscussionSPC91 min
Aug 26, 7:04 PM MDTMesoscale DiscussionSPC116 min
Aug 26, 7:12 PM MDTSpecial Weather StatementBYZ48 min
Aug 28, 2:20 PM MDTRed Flag WarningBYZ31 hr
Aug 30, 2:17 PM MDTFire Weather WatchBYZ13 hr
Aug 31, 3:27 AM MDTRed Flag WarningBYZ69 hr
Sep 3, 3:14 AM MDTFire Weather WatchBYZ32 hr
Sep 4, 11:14 AM MDTRed Flag WarningBYZ57 hr
Sep 6, 3:09 AM MDTWinter Weather AdvisoryBYZ51 hr
Sep 7, 3:15 AM MDTWinter Storm WarningBYZ26 hr
Sep 12, 2:46 AM MDTFire Weather WatchBYZ24 hr
Sep 13, 3:11 AM MDTRed Flag WarningBYZ42 hr
Sep 22, 1:46 PM MDTFire Weather WatchBYZ24 hr
Sep 23, 1:22 PM MDTRed Flag WarningBYZ31 hr
Sep 25, 10:53 AM MDTRed Flag WarningBYZ33 hr
Oct 2, 1:47 PM MDTFire Weather WatchBYZ24 hr
Oct 3, 2:04 PM MDTRed Flag WarningBYZ30 hr
Oct 6, 3:26 AM MDTRed Flag WarningBYZ17 hr
Oct 7, 3:33 AM MDTFire Weather WatchBYZ7 hr
Oct 7, 10:35 AM MDTRed Flag WarningBYZ34 hr
Oct 9, 2:29 AM MDTFire Weather WatchBYZ9 hr
Oct 9, 11:58 AM MDTRed Flag WarningBYZ32 hr
Oct 10, 2:00 AM MDTWind AdvisoryBYZ20 hr
Oct 12, 2:36 AM MDTWind AdvisoryBYZ15 hr
Oct 13, 3:20 AM MDTWind AdvisoryBYZ36 hr
Oct 15, 2:48 AM MDTWind AdvisoryBYZ48 hr
Oct 16, 2:32 PM MDTWinter Weather AdvisoryBYZ4 days
Oct 20, 3:33 AM MDTWinter Storm WatchBYZ25 hr
Oct 21, 4:34 AM MDTWinter Storm WarningBYZ37 hr
Oct 21, 4:34 AM MDTWinter Weather AdvisoryBYZ40 hr
Oct 22, 2:31 PM MDTWinter Storm WatchBYZ24 hr
Oct 23, 3:58 AM MDTWinter Storm WarningBYZ50 hr
Oct 23, 3:58 AM MDTWinter Weather AdvisoryBYZ50 hr
Oct 25, 10:01 AM MDTWinter Weather AdvisoryBYZ52 hr
Oct 30, 1:36 AM MDTWind AdvisoryBYZ19 hr
Nov 5, 9:27 AM MSTWind AdvisoryBYZ4 hr
Nov 5, 1:28 PM MSTWinter Storm WatchBYZ38 hr
Nov 7, 3:51 AM MSTWinter Storm WarningBYZ37 hr
Nov 12, 11:25 AM MSTWind AdvisoryBYZ27 hr
Nov 13, 4:12 AM MSTHigh Wind WarningBYZ38 hr
Nov 13, 8:44 PM MSTWind AdvisoryBYZ21 hr
Nov 15, 3:07 PM MSTWind AdvisoryBYZ6 hr
Nov 24, 1:55 AM MSTWind AdvisoryBYZ34 hr
Nov 27, 2:51 PM MSTWind AdvisoryBYZ22 hr
Dec 7, 1:49 PM MSTWind AdvisoryBYZ31 hr
Dec 14, 12:21 PM MSTWind AdvisoryBYZ44 hr
Dec 17, 3:10 AM MSTHigh Wind WatchBYZ24 hr
Dec 17, 6:20 AM MSTSpecial Weather StatementBYZ3 hr
Dec 18, 2:42 AM MSTHigh Wind WarningBYZ65 hr
Dec 18, 2:42 AM MSTWind AdvisoryBYZ24 hr
Dec 21, 2:33 AM MSTWind AdvisoryBYZ31 hr
Dec 24, 9:19 AM MSTWind AdvisoryBYZ25 hr
Dec 29, 1:34 PM MSTWind AdvisoryBYZ40 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 archive20192021

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.