Alert archive / Montana / Carter County

Weather alerts in Carter County, Montana, 2012

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

Carter County and its neighbors

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

Alerts
118
Warnings
43
Watches
26
Advisories
9
Busiest month
July36 alerts
Busiest day
August 2, 20127 alerts

Over time

By month

Warning verification

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

Carter County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings13562%4100%22 min
Flash flood warnings00

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: severe thunderstorm warnings291645%3855%21 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 17, 11:04 AM MSTWinter Storm WarningBYZ65 hr
Jan 18, 4:19 AM MSTWind Chill AdvisoryBYZ26 hr
Jan 21, 12:33 PM MSTWinter Weather AdvisoryBYZ22 hr
Feb 3, 9:02 AM MSTDense Fog AdvisoryBYZ3 hr
Feb 20, 10:19 AM MSTHigh Wind WatchBYZ29 hr
Feb 20, 9:04 PM MSTHigh Wind WarningBYZ47 hr
Feb 22, 8:33 PM MSTWinter Weather AdvisoryBYZ8 hr
Feb 25, 3:58 PM MSTWinter Weather AdvisoryBYZ19 hr
Feb 26, 3:43 PM MSTWinter Storm WatchBYZ36 hr
Feb 28, 3:31 AM MSTWinter Weather AdvisoryBYZ23 hr
Mar 12, 3:59 PM MDTRed Flag WarningBYZ32 hr
Mar 14, 3:08 PM MDTFire Weather WatchBYZ25 hr
Mar 15, 3:58 AM MDTRed Flag WarningBYZ4 days
Mar 25, 4:15 AM MDTFire Weather WatchBYZ10 hr
Mar 25, 2:01 PM MDTRed Flag WarningBYZ30 hr
Mar 26, 4:05 AM MDTHigh Wind WatchBYZ11 hr
Mar 26, 11:43 AM MDTHigh Wind WarningBYZ12 hr
Mar 26, 2:56 PM MDTMesoscale DiscussionSPC2 hr
Mar 26, 5:46 PM MDTSpecial Weather StatementBYZ59 min
Mar 26, 11:38 PM MDTHigh Wind WarningBYZ6 hr
Mar 29, 4:49 AM MDTFire Weather WatchBYZ22 hr
Mar 30, 3:18 AM MDTRed Flag WarningBYZ65 hr
Apr 3, 2:52 AM MDTFire Weather WatchBYZ12 hr
Apr 3, 2:26 PM MDTRed Flag WarningBYZ30 hr
Apr 8, 3:24 AM MDTRed Flag WarningBYZ15 hr
Apr 11, 9:59 AM MDTHigh Wind WarningBYZ11 hr
Apr 23, 3:21 PM MDTFire Weather WatchBYZ12 hr
Apr 26, 6:29 PM MDTHigh Wind WarningBYZ9 hr
Apr 28, 3:58 AM MDTWinter Weather AdvisoryBYZ24 hr
May 22, 4:59 PM MDTSpecial Weather StatementBYZ61 min
May 22, 5:11 PM MDTMesoscale DiscussionSPC94 min
Jun 2, 2:10 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 2, 5:23 PM MDTSpecial Weather StatementBYZ52 min
Jun 2, 6:08 PM MDTMesoscale DiscussionSPC97 min
Jun 5, 10:54 PM MDTSpecial Weather StatementBYZ66 min
Jun 9, 9:06 PM MDTSpecial Weather StatementBYZ54 min
Jun 12, 2:49 PM MDTSpecial Weather StatementBYZ41 min
Jun 22, 8:49 PM MDTSpecial Weather StatementBYZ56 min
Jun 22, 10:17 PM MDTSpecial Weather StatementBYZ28 min
Jun 24, 2:42 PM MDTFire Weather WatchBYZ13 hr
Jun 25, 3:35 AM MDTRed Flag WarningBYZ44 hr
Jun 25, 2:09 PM MDTMesoscale DiscussionSPC2 hr
Jun 25, 3:07 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 25, 4:36 PM MDTSevere Thunderstorm WarningBYZ54 min
Jun 25, 5:26 PM MDTMesoscale DiscussionSPC94 min
Jun 29, 4:05 AM MDTRed Flag WarningBYZ18 hr
Jun 29, 2:54 PM MDTRed Flag WarningBYZ60 hr
Jul 1, 2:40 PM MDTMesoscale DiscussionSPC2 hr
Jul 1, 3:52 PM MDTSevere Thunderstorm WarningBYZ50 min
Jul 1, 4:04 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 1, 4:58 PM MDTSevere Thunderstorm WarningBYZ62 min
Jul 1, 5:46 PM MDTSevere Thunderstorm WarningBYZ59 min
Jul 1, 6:35 PM MDTMesoscale DiscussionSPC115 min
Jul 2, 5:02 AM MDTFire Weather WatchBYZ10 hr
Jul 2, 2:34 PM MDTRed Flag WarningBYZ33 hr
Jul 3, 12:48 AM MDTSpecial Weather StatementBYZ57 min
Jul 3, 3:33 AM MDTSpecial Weather StatementBYZ57 min
Jul 3, 4:29 AM MDTSpecial Weather StatementBYZ61 min
Jul 5, 2:40 PM MDTMesoscale DiscussionSPC95 min
Jul 5, 4:10 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 5, 5:37 PM MDTMesoscale DiscussionSPC53 min
Jul 5, 5:55 PM MDTTornado WatchSPC6 hr
Jul 5, 6:59 PM MDTSpecial Weather StatementBYZ61 min
Jul 5, 8:52 PM MDTMesoscale DiscussionSPC53 min
Jul 5, 9:15 PM MDTSpecial Weather StatementBYZ45 min
Jul 10, 2:37 PM MDTRed Flag WarningBYZ30 hr
Jul 13, 10:48 AM MDTRed Flag WarningBYZ34 hr
Jul 16, 2:07 PM MDTMesoscale DiscussionSPC113 min
Jul 16, 2:51 PM MDTSpecial Weather StatementBYZ54 min
Jul 16, 2:53 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 16, 3:04 PM MDTSevere Thunderstorm WarningBYZ26 min
Jul 16, 5:53 PM MDTMesoscale DiscussionSPC67 min
Jul 17, 12:44 PM MDTMesoscale DiscussionSPC61 min
Jul 17, 5:14 PM MDTSevere Thunderstorm WarningBYZ61 min
Jul 21, 4:25 PM MDTMesoscale DiscussionSPC65 min
Jul 21, 4:41 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 21, 5:11 PM MDTSpecial Weather StatementBYZ49 min
Jul 21, 5:35 PM MDTSevere Thunderstorm WarningBYZ31 min
Jul 21, 7:59 PM MDTSpecial Weather StatementBYZ31 min
Jul 24, 6:18 PM MDTSpecial Weather StatementBYZ57 min
Jul 27, 2:27 PM MDTMesoscale DiscussionSPC3 hr
Jul 28, 2:18 AM MDTSpecial Weather StatementBYZ57 min
Jul 31, 3:19 PM MDTFire Weather WatchBYZ49 hr
Aug 2, 1:44 PM MDTMesoscale DiscussionSPC31 min
Aug 2, 1:59 PM MDTSevere Thunderstorm WarningBYZ59 min
Aug 2, 2:03 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 2, 2:19 PM MDTSevere Thunderstorm WarningBYZ56 min
Aug 2, 3:15 PM MDTSevere Thunderstorm WarningBYZ26 min
Aug 2, 3:55 PM MDTSpecial Weather StatementBYZ65 min
Aug 2, 4:41 PM MDTSpecial Weather StatementBYZ34 min
Aug 2, 6:10 PM MDTMesoscale DiscussionSPC95 min
Aug 6, 9:03 PM MDTRed Flag WarningBYZ24 hr
Aug 13, 3:47 AM MDTFire Weather WatchBYZ11 hr
Aug 13, 11:53 AM MDTMesoscale DiscussionSPC2 hr
Aug 13, 3:10 PM MDTRed Flag WarningBYZ30 hr
Aug 13, 4:10 PM MDTMesoscale DiscussionSPC2 hr
Aug 13, 5:56 PM MDTSevere Thunderstorm WarningBYZ49 min
Aug 13, 6:05 PM MDTSevere Thunderstorm WarningBYZ55 min
Aug 13, 6:45 PM MDTSevere Thunderstorm WarningBYZ31 min
Aug 22, 2:55 PM MDTFire Weather WatchBYZ19 hr
Aug 23, 9:36 AM MDTRed Flag WarningBYZ38 hr
Aug 26, 4:24 AM MDTFire Weather WatchBYZ48 hr
Aug 26, 3:17 PM MDTRed Flag WarningBYZ30 hr
Aug 28, 4:05 AM MDTRed Flag WarningBYZ43 hr
Aug 30, 3:37 PM MDTFire Weather WatchBYZ5 hr
Aug 30, 8:49 PM MDTRed Flag WarningBYZ3 days
Sep 3, 4:56 AM MDTRed Flag WarningBYZ40 hr
Sep 6, 3:49 PM MDTFire Weather WatchBYZ22 hr
Sep 7, 2:06 PM MDTRed Flag WarningBYZ4 days
Sep 13, 4:14 AM MDTRed Flag WarningBYZ15 hr
Sep 18, 3:20 AM MDTRed Flag WarningBYZ17 hr
Sep 30, 4:07 AM MDTFire Weather WatchBYZ30 hr
Oct 1, 9:39 AM MDTRed Flag WarningBYZ34 hr
Oct 17, 12:51 AM MDTHigh Wind WarningBYZ20 hr
Nov 6, 3:36 PM MSTWinter Storm WatchBYZ3 days
Nov 8, 3:47 PM MSTWinter Weather AdvisoryBYZ47 hr
Nov 9, 5:17 PM MSTMesoscale DiscussionSPC4 hr
Dec 7, 3:42 PM MSTWinter Weather AdvisoryBYZ35 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.