Alert archive / Montana / Park County

Weather alerts in Park County, Montana, 2011

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

Alerts
140
Warnings
39
Watches
31
Advisories
42
Busiest month
July23 alerts
Busiest day
July 6, 20114 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.

Park County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings010%
Severe thunderstorm warnings10100%20%
Flash flood warnings10100%0

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: tornado warnings13562%875%21 min
NWS Billings, MT: severe thunderstorm warnings1717656%19074%21 min
NWS Billings, MT: flash flood warnings21576%7100%40 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, 8:39 PM MSTWind Chill AdvisoryBYZ14 hr
Jan 1, 3:46 AM MSTWinter Weather AdvisoryBYZ49 hr
Jan 4, 4:01 AM MSTWind AdvisoryBYZ59 hr
Jan 6, 6:54 PM MSTWind AdvisoryBYZ2 hr
Jan 12, 8:07 AM MSTWind AdvisoryBYZ21 hr
Jan 15, 3:00 PM MSTHigh Wind WatchBYZ12 hr
Jan 16, 3:07 AM MSTWind AdvisoryBYZ20 hr
Jan 18, 4:09 AM MSTWinter Storm WarningBYZ32 hr
Jan 18, 4:09 AM MSTWinter Weather AdvisoryBYZ32 hr
Jan 19, 2:56 PM MSTBlizzard WatchBYZ12 hr
Jan 20, 3:06 AM MSTBlizzard WarningBYZ24 hr
Jan 21, 2:18 PM MSTWind AdvisoryBYZ13 hr
Jan 22, 3:26 PM MSTWind AdvisoryBYZ25 hr
Jan 27, 3:59 AM MSTWind AdvisoryBYZ31 hr
Jan 28, 3:17 PM MSTWinter Weather AdvisoryBYZ60 hr
Jan 31, 3:33 AM MSTWind Chill AdvisoryBYZ25 hr
Feb 1, 11:08 PM MSTWind Chill AdvisoryBYZ11 hr
Feb 3, 2:55 PM MSTWind AdvisoryBYZ30 hr
Feb 4, 2:51 PM MSTWinter Storm WarningBYZ24 hr
Feb 5, 3:10 PM MSTWinter Storm WatchBYZ24 hr
Feb 6, 3:08 PM MSTWinter Storm WarningBYZ33 hr
Feb 10, 1:47 PM MSTHigh Wind WatchBYZ38 hr
Feb 11, 3:46 AM MSTHigh Wind WarningBYZ62 hr
Feb 14, 4:35 AM MSTHigh Wind WatchBYZ10 hr
Feb 14, 2:20 PM MSTWind AdvisoryBYZ31 hr
Feb 19, 3:47 AM MSTWinter Weather AdvisoryBYZ38 hr
Feb 26, 2:47 AM MSTWind Chill AdvisoryBYZ8 hr
Feb 27, 10:05 AM MSTWind AdvisoryBYZ12 hr
Feb 27, 10:30 PM MSTHigh Wind WarningBYZ25 hr
Mar 9, 2:25 PM MSTWind AdvisoryBYZ31 hr
Mar 14, 2:19 AM MDTWind AdvisoryBYZ10 hr
Mar 15, 10:49 PM MDTWind AdvisoryBYZ5 hr
Mar 16, 3:59 AM MDTWinter Storm WarningBYZ23 hr
Mar 21, 3:02 PM MDTWinter Weather AdvisoryBYZ38 hr
Mar 22, 6:25 AM MDTWinter Storm WarningBYZ23 hr
Mar 29, 3:23 AM MDTWinter Storm WatchBYZ12 hr
Mar 29, 3:17 PM MDTWinter Storm WarningBYZ60 hr
Apr 4, 10:47 AM MDTWind AdvisoryBYZ22 hr
Apr 5, 2:55 AM MDTWinter Storm WarningBYZ18 hr
Apr 6, 3:40 PM MDTWinter Storm WatchBYZ12 hr
Apr 6, 3:40 PM MDTWinter Storm WarningBYZ53 hr
Apr 17, 4:34 AM MDTWinter Storm WatchBYZ34 hr
Apr 18, 4:34 AM MDTWinter Storm WarningBYZ35 hr
Apr 20, 3:25 PM MDTWinter Storm WatchBYZ12 hr
Apr 21, 3:28 AM MDTWinter Storm WarningBYZ38 hr
May 7, 3:31 PM MDTWinter Storm WatchBYZ12 hr
May 8, 3:40 AM MDTWinter Storm WarningBYZ62 hr
May 10, 2:31 AM MDTAreal Flood WarningBYZ11 hr
May 10, 9:54 AM MDTAreal Flood WarningBYZ32 hr
May 11, 5:58 PM MDTAreal Flood AdvisoryBYZ15 hr
May 14, 9:43 AM MDTAreal Flood WarningBYZ3 days
May 14, 5:05 PM MDTAreal Flood WarningBYZ69 hr
May 17, 3:35 PM MDTFlood WatchBYZ5 days
May 18, 3:18 AM MDTWinter Storm WatchBYZ24 hr
May 19, 3:14 AM MDTWinter Storm WarningBYZ3 days
May 23, 9:52 AM MDTFlood WatchBYZ48 hr
May 23, 10:06 AM MDTRiver Flood WarningBYZ3 days
May 26, 2:15 PM MDTAreal Flood WarningBYZ20 hr
May 27, 3:48 AM MDTFlood WatchBYZ4 days
May 28, 3:52 AM MDTWinter Storm WatchBYZ24 hr
May 29, 3:49 AM MDTWinter Storm WarningBYZ40 hr
Jun 1, 9:27 PM MDTWind AdvisoryBYZ24 hr
Jun 3, 4:03 PM MDTRiver Flood WatchBYZ4 days
Jun 3, 4:03 PM MDTRiver Flood WatchBYZ7 days
Jun 6, 2:13 PM MDTMesoscale DiscussionSPC2 hr
Jun 6, 4:45 PM MDTMesoscale DiscussionSPC2 hr
Jun 6, 5:46 PM MDTTornado WatchSPC7 hr
Jun 15, 1:22 PM MDTRiver Flood WatchBYZ48 hr
Jun 22, 3:37 PM MDTRiver Flood WarningBYZ18 days
Jun 23, 4:50 PM MDTMesoscale DiscussionSPC85 min
Jun 29, 4:11 PM MDTWind AdvisoryBYZ5 hr
Jul 3, 12:31 PM MDTMesoscale DiscussionSPC2 hr
Jul 3, 4:08 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 5:11 PM MDTSpecial Weather StatementBYZ49 min
Jul 3, 7:39 PM MDTSpecial Weather StatementBYZ51 min
Jul 4, 6:58 PM MDTSpecial Weather StatementBYZ62 min
Jul 6, 2:19 PM MDTMesoscale DiscussionSPC2 hr
Jul 6, 4:25 PM MDTSpecial Weather StatementBYZ50 min
Jul 6, 5:28 PM MDTSpecial Weather StatementBYZ62 min
Jul 6, 5:37 PM MDTFlash Flood WarningBYZ3 hr
Jul 6, 6:08 PM MDTSevere Thunderstorm WarningBYZ57 min
Jul 7, 2:29 PM MDTSpecial Weather StatementBYZ61 min
Jul 8, 1:38 PM MDTMesoscale DiscussionSPC97 min
Jul 8, 3:17 PM MDTSpecial Weather StatementBYZ58 min
Jul 11, 2:53 PM MDTMesoscale DiscussionSPC97 min
Jul 12, 12:56 PM MDTMesoscale DiscussionSPC64 min
Jul 12, 1:12 PM MDTSpecial Weather StatementBYZ63 min
Jul 12, 1:38 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 12, 5:30 PM MDTMesoscale DiscussionSPC60 min
Jul 13, 2:49 PM MDTSpecial Weather StatementBYZ56 min
Jul 14, 1:56 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 15, 2:39 PM MDTMesoscale DiscussionSPC2 hr
Jul 22, 2:57 PM MDTSpecial Weather StatementBYZ63 min
Jul 25, 6:48 PM MDTSpecial Weather StatementBYZ57 min
Aug 1, 7:16 PM MDTSpecial Weather StatementBYZ59 min
Aug 1, 8:07 PM MDTSpecial Weather StatementBYZ53 min
Aug 15, 1:38 PM MDTMesoscale DiscussionSPC2 hr
Aug 21, 2:43 PM MDTSpecial Weather StatementBYZ62 min
Aug 21, 3:32 PM MDTSpecial Weather StatementBYZ58 min
Aug 24, 2:32 PM MDTFire Weather WatchBYZ13 hr
Aug 25, 3:04 AM MDTRed Flag WarningBYZ18 hr
Aug 26, 3:54 PM MDTMesoscale DiscussionSPC96 min
Aug 26, 4:26 PM MDTSevere Thunderstorm WatchSPC5 hr
Aug 30, 3:26 PM MDTRed Flag WarningBYZ30 hr
Aug 31, 2:20 PM MDTMesoscale DiscussionSPC115 min
Sep 19, 2:23 AM MDTRed Flag WarningBYZ19 hr
Sep 25, 2:45 AM MDTRed Flag WarningBYZ19 hr
Sep 27, 3:18 AM MDTRed Flag WarningBYZ18 hr
Sep 29, 3:05 PM MDTFire Weather WatchBYZ14 hr
Sep 29, 3:05 PM MDTRed Flag WarningBYZ30 hr
Sep 30, 4:04 AM MDTRed Flag WarningBYZ41 hr
Oct 2, 3:29 AM MDTRed Flag WarningBYZ18 hr
Oct 28, 9:15 PM MDTWind AdvisoryBYZ13 hr
Nov 2, 1:29 PM MDTWind AdvisoryBYZ26 hr
Nov 8, 8:52 PM MSTHigh Wind WatchBYZ18 hr
Nov 9, 3:14 PM MSTWind AdvisoryBYZ66 hr
Nov 12, 3:46 PM MSTWind AdvisoryBYZ50 hr
Nov 15, 3:51 PM MSTHigh Wind WatchBYZ12 hr
Nov 16, 3:43 AM MSTHigh Wind WarningBYZ37 hr
Nov 16, 3:05 PM MSTWinter Storm WatchBYZ38 hr
Nov 17, 3:46 AM MSTWinter Storm WarningBYZ49 hr
Nov 17, 3:37 PM MSTWinter Weather AdvisoryBYZ48 hr
Nov 21, 3:46 PM MSTWind AdvisoryBYZ54 hr
Nov 26, 3:19 AM MSTWind AdvisoryBYZ51 hr
Nov 29, 3:50 AM MSTWinter Storm WatchBYZ24 hr
Nov 29, 4:16 PM MSTWinter Weather AdvisoryBYZ35 hr
Nov 30, 4:19 AM MSTWinter Storm WarningBYZ26 hr
Dec 1, 3:09 AM MSTWind AdvisoryBYZ18 hr
Dec 3, 9:39 PM MSTWinter Weather AdvisoryBYZ15 hr
Dec 6, 2:08 AM MSTWind AdvisoryBYZ13 hr
Dec 19, 2:14 PM MSTWinter Storm WatchBYZ26 hr
Dec 20, 3:47 PM MSTWinter Storm WarningBYZ29 hr
Dec 20, 3:47 PM MSTWinter Weather AdvisoryBYZ29 hr
Dec 22, 3:17 AM MSTHigh Wind WatchBYZ12 hr
Dec 22, 3:16 PM MSTWind AdvisoryBYZ42 hr
Dec 25, 4:46 PM MSTWind AdvisoryBYZ17 hr
Dec 26, 2:56 PM MSTWind AdvisoryBYZ18 hr
Dec 27, 8:56 AM MSTHigh Wind WarningBYZ60 hr
Dec 29, 3:13 PM MSTWind AdvisoryBYZ30 hr
Dec 30, 3:36 AM MSTWinter Storm WarningBYZ30 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.