Alert archive / Montana / Fallon County

Weather alerts in Fallon County, Montana, 2024

109 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Fallon County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts
109
Warnings
21
Watches
19
Advisories
16
Busiest month
August23 alerts
Busiest day
May 29, 20248 alerts

Over time

By month

Warning verification

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

Fallon County, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings6267%138%4 min
Flash flood warnings00

Each office's whole area, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: tornado warnings10100%0
NWS Billings, MT: severe thunderstorm warnings893165%12750%23 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 3, 12:23 AM MSTDense Fog AdvisoryBYZ11 hr
Jan 11, 1:47 AM MSTWinter Weather AdvisoryBYZ36 hr
Jan 12, 1:33 PM MSTWind Chill WarningBYZ69 hr
Jan 14, 1:11 AM MSTWind Chill AdvisoryBYZ58 hr
Jan 16, 1:08 AM MSTWinter Weather AdvisoryBYZ59 hr
Jan 18, 11:53 AM MSTWind Chill AdvisoryBYZ46 hr
Jan 22, 12:46 AM MSTDense Fog AdvisoryBYZ5 hr
Jan 22, 11:00 AM MSTDense Fog AdvisoryBYZ24 hr
Feb 2, 4:13 AM MSTDense Fog AdvisoryBYZ56 hr
Feb 5, 8:41 AM MSTSpecial Weather StatementBYZ2 hr
Feb 6, 8:02 AM MSTSpecial Weather StatementBYZ3 hr
Feb 6, 11:05 AM MSTSpecial Weather StatementBYZ3 hr
Feb 6, 7:38 PM MSTDense Fog AdvisoryBYZ15 hr
Feb 7, 12:14 AM MSTSpecial Weather StatementBYZ4 hr
Feb 7, 2:19 AM MSTWinter Weather AdvisoryBYZ40 hr
Feb 12, 8:59 AM MSTSpecial Weather StatementBYZ2 hr
Mar 21, 2:49 PM MDTWinter Storm WatchBYZ38 hr
Mar 22, 1:40 PM MDTWinter Storm WarningBYZ50 hr
Mar 23, 4:40 AM MDTWinter Weather AdvisoryBYZ40 hr
Apr 26, 5:55 AM MDTSpecial Weather StatementBYZ2 hr
May 2, 1:40 PM MDTSpecial Weather StatementBYZ3 hr
May 6, 11:18 AM MDTSevere Thunderstorm WatchSPC8 hr
May 17, 1:02 PM MDTMesoscale DiscussionSPC118 min
May 17, 1:30 PM MDTSevere Thunderstorm WatchSPC7 hr
May 17, 2:01 PM MDTSpecial Weather StatementBYZ44 min
May 23, 3:34 PM MDTSpecial Weather StatementBYZ41 min
May 23, 4:47 PM MDTSpecial Weather StatementBYZ43 min
May 23, 7:33 PM MDTSpecial Weather StatementBYZ42 min
May 29, 12:25 PM MDTMesoscale DiscussionSPC2 hr
May 29, 2:10 PM MDTSevere Thunderstorm WatchSPC7 hr
May 29, 3:57 PM MDTSpecial Weather StatementBYZ48 min
May 29, 4:18 PM MDTSevere Thunderstorm WarningBYZ4 min
May 29, 4:21 PM MDTSevere Thunderstorm WarningBYZ24 min
May 29, 4:36 PM MDTMesoscale DiscussionSPC84 min
May 29, 4:51 PM MDTSpecial Weather StatementBYZ39 min
May 29, 5:41 PM MDTSpecial Weather StatementBYZ34 min
Jun 2, 4:49 AM MDTSpecial Weather StatementBYZ26 min
Jun 2, 5:13 AM MDTSpecial Weather StatementBYZ47 min
Jun 2, 5:57 AM MDTSpecial Weather StatementBYZ33 min
Jun 3, 2:38 PM MDTHigh Wind WarningBYZ51 hr
Jun 3, 9:53 PM MDTSevere Thunderstorm WarningBYZ37 min
Jun 4, 1:55 AM MDTHigh Wind WatchBYZ12 hr
Jun 15, 4:00 PM MDTSevere Thunderstorm WatchSPC5 hr
Jun 15, 9:55 PM MDTSpecial Weather StatementBYZ20 min
Jun 17, 4:32 PM MDTSevere Thunderstorm WatchSPC5 hr
Jun 22, 3:10 AM MDTSpecial Weather StatementBYZ35 min
Jun 22, 2:54 PM MDTMesoscale DiscussionSPC2 hr
Jun 24, 12:40 AM MDTMesoscale DiscussionSPC2 hr
Jun 27, 1:02 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 27, 4:01 PM MDTMesoscale DiscussionSPC89 min
Jun 27, 4:47 PM MDTSpecial Weather StatementBYZ58 min
Jun 27, 5:47 PM MDTSpecial Weather StatementBYZ43 min
Jun 30, 8:46 PM MDTSevere Thunderstorm WatchSPC4 hr
Jul 5, 6:35 PM MDTSpecial Weather StatementBYZ55 min
Jul 10, 1:30 AM MDTHeat AdvisoryBYZ5 days
Jul 13, 4:41 PM MDTMesoscale DiscussionSPC2 hr
Jul 13, 5:36 PM MDTSevere Thunderstorm WatchSPC4 hr
Jul 13, 6:57 PM MDTMesoscale DiscussionSPC2 hr
Jul 13, 7:53 PM MDTMesoscale DiscussionSPC2 hr
Jul 13, 8:34 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ26 min
Jul 16, 2:09 AM MDTSpecial Weather StatementBYZ51 min
Jul 22, 3:00 AM MDTExcessive Heat WatchBYZ23 hr
Jul 23, 2:26 AM MDTExcessive Heat WarningBYZ67 hr
Jul 23, 2:09 PM MDTFire Weather WatchBYZ22 hr
Jul 24, 12:27 PM MDTRed Flag WarningBYZ33 hr
Jul 31, 1:00 PM MDTExcessive Heat WarningBYZ58 hr
Aug 2, 12:56 PM MDTHeat AdvisoryBYZ31 hr
Aug 4, 4:07 PM MDTMesoscale DiscussionSPC113 min
Aug 4, 11:29 PM MDTSpecial Weather StatementBYZ61 min
Aug 5, 12:36 AM MDTSpecial Weather StatementBYZ24 min
Aug 6, 4:07 PM MDTSevere Thunderstorm WatchSPC6 hr
Aug 6, 7:19 PM MDTSpecial Weather StatementBYZ26 min
Aug 6, 7:37 PM MDTSpecial Weather StatementBYZ23 min
Aug 12, 5:06 AM MDTSpecial Weather StatementBYZ4 hr
Aug 13, 8:13 AM MDTSpecial Weather StatementBYZ32 min
Aug 19, 1:32 PM MDTSpecial Weather StatementBYZ28 min
Aug 19, 1:44 PM MDTMesoscale DiscussionSPC91 min
Aug 21, 3:00 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 5:16 PM MDTMesoscale DiscussionSPC119 min
Aug 21, 7:53 PM MDTMesoscale DiscussionSPC2 hr
Aug 21, 9:14 PM MDTSpecial Weather StatementBYZ31 min
Aug 21, 9:30 PM MDTSevere Thunderstorm WarningBYZ30 min
Aug 21, 9:55 PM MDTSevere Thunderstorm WarningBYZ35 min
Aug 21, 10:04 PM MDTSpecial Weather StatementBYZ26 min
Aug 21, 10:13 PM MDTMesoscale DiscussionSPC92 min
Aug 23, 2:43 AM MDTFire Weather WatchBYZ12 hr
Aug 23, 2:23 PM MDTRed Flag WarningBYZ31 hr
Aug 23, 4:39 PM MDTMesoscale DiscussionSPC2 hr
Aug 28, 8:35 AM MDTSpecial Weather StatementBYZ55 min
Sep 11, 2:27 AM MDTRed Flag WarningBYZ18 hr
Sep 11, 3:00 PM MDTFire Weather WatchBYZ11 hr
Sep 12, 2:23 AM MDTRed Flag WarningBYZ17 hr
Sep 12, 12:12 PM MDTMesoscale DiscussionSPC2 hr
Sep 12, 12:59 PM MDTSevere Thunderstorm WatchSPC6 hr
Sep 17, 5:25 PM MDTMesoscale DiscussionSPC3 hr
Sep 25, 1:17 PM MDTRed Flag WarningBYZ29 hr
Sep 29, 10:31 PM MDTSpecial Weather StatementBYZ59 min
Oct 1, 1:48 AM MDTRed Flag WarningBYZ41 hr
Oct 3, 2:52 AM MDTHigh Wind WatchBYZ41 hr
Oct 3, 5:36 PM MDTRed Flag WarningBYZ48 hr
Oct 4, 2:15 AM MDTHigh Wind WarningBYZ40 hr
Oct 4, 2:33 AM MDTFire Weather WatchBYZ9 hr
Oct 5, 12:20 AM MDTSpecial Weather StatementBYZ115 min
Nov 19, 12:44 AM MSTHigh Wind WarningBYZ35 hr
Dec 8, 2:10 AM MSTWinter Weather AdvisoryBYZ34 hr
Dec 8, 7:59 PM MSTMesoscale DiscussionSPC6 hr
Dec 14, 3:14 AM MSTWinter Weather AdvisoryBYZ41 hr
Dec 17, 2:08 AM MSTHigh Wind WarningBYZ51 hr
Dec 29, 2:26 AM MSTWinter Weather AdvisoryBYZ39 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 archive20232025

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.