Alert archive / Montana / Fallon County

Weather alerts in Fallon County, Montana, 2025

132 weather alerts in 2025, 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 2025. Tap one for its archive.

Alerts
132
Warnings
37
Watches
18
Advisories
23
Busiest month
July45 alerts
Busiest day
July 20, 20258 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, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings291259%1861%30 min
Flash flood warnings00

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: tornado warnings4175%1100%2 min
NWS Billings, MT: severe thunderstorm warnings2607770%21367%27 min
NWS Billings, MT: flash flood warnings200100%30%

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, 1:09 AM MSTWinter Weather AdvisoryBYZ3 days
Jan 2, 1:42 PM MSTWinter Storm WatchBYZ25 hr
Jan 8, 3:13 AM MSTWinter Weather AdvisoryBYZ24 hr
Jan 9, 1:14 PM MSTWinter Storm WatchBYZ26 hr
Jan 10, 3:06 PM MSTWinter Weather AdvisoryBYZ52 hr
Jan 13, 3:36 PM MSTSpecial Weather StatementBYZ114 min
Jan 18, 1:28 AM MSTCold Weather AdvisoryBYZ3 days
Jan 19, 1:40 PM MSTCold Weather AdvisoryBYZ38 hr
Jan 19, 1:40 PM MSTExtreme Cold WarningBYZ22 hr
Jan 21, 2:17 AM MSTWinter Weather AdvisoryBYZ51 hr
Feb 2, 3:14 AM MSTWinter Weather AdvisoryBYZ41 hr
Feb 2, 8:31 PM MSTCold Weather AdvisoryBYZ38 hr
Feb 6, 1:54 AM MSTWinter Weather AdvisoryBYZ46 hr
Feb 10, 1:25 AM MSTExtreme Cold WarningBYZ34 hr
Feb 11, 2:48 PM MSTCold Weather AdvisoryBYZ21 hr
Feb 12, 2:10 PM MSTCold Weather AdvisoryBYZ20 hr
Feb 15, 1:53 PM MSTCold Weather AdvisoryBYZ22 hr
Feb 16, 1:50 PM MSTExtreme Cold WarningBYZ69 hr
Feb 19, 11:14 AM MSTCold Weather AdvisoryBYZ25 hr
Mar 9, 2:18 PM MDTRed Flag WarningBYZ29 hr
Apr 3, 5:46 PM MDTSpecial Weather StatementBYZ59 min
Apr 12, 7:28 PM MDTSpecial Weather StatementBYZ47 min
Apr 13, 2:29 AM MDTHigh Wind WarningBYZ16 hr
Apr 27, 5:34 AM MDTDense Fog AdvisoryBYZ4 hr
Apr 27, 4:34 PM MDTSevere Thunderstorm WatchSPC7 hr
Apr 27, 8:30 PM MDTMesoscale DiscussionSPC90 min
Apr 27, 8:40 PM MDTSevere Thunderstorm WarningBYZ80 min
May 11, 3:57 PM MDTMesoscale DiscussionSPC2 hr
May 11, 4:28 PM MDTSevere Thunderstorm WatchSPC7 hr
May 11, 6:51 PM MDTSpecial Weather StatementBYZ24 min
May 11, 7:23 PM MDTMesoscale DiscussionSPC97 min
May 16, 2:16 AM MDTHigh Wind WarningBYZ11 hr
Jun 13, 8:53 PM MDTMesoscale DiscussionSPC97 min
Jun 13, 9:41 PM MDTSevere Thunderstorm WarningBYZ49 min
Jun 13, 10:18 PM MDTSevere Thunderstorm WarningBYZ12 min
Jun 13, 10:27 PM MDTSevere Thunderstorm WarningBYZ33 min
Jun 15, 1:13 PM MDTMesoscale DiscussionSPC2 hr
Jun 15, 2:15 PM MDTSevere Thunderstorm WatchSPC11 hr
Jun 15, 4:53 PM MDTMesoscale DiscussionSPC97 min
Jun 15, 9:47 PM MDTSevere Thunderstorm WarningBYZ58 min
Jun 15, 10:44 PM MDTSevere Thunderstorm WarningBYZ46 min
Jun 15, 10:58 PM MDTSevere Thunderstorm WarningBYZ62 min
Jun 16, 12:39 AM MDTSevere Thunderstorm Warning Considerable damage threatBYZ66 min
Jun 20, 2:24 PM MDTMesoscale DiscussionSPC2 hr
Jun 20, 2:46 PM MDTSevere Thunderstorm WatchSPC6 hr
Jun 20, 4:01 PM MDTSevere Thunderstorm WarningBYZ59 min
Jun 20, 4:52 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ53 min
Jun 20, 4:58 PM MDTSpecial Weather StatementBYZ47 min
Jun 20, 5:14 PM MDTMesoscale DiscussionSPC91 min
Jun 25, 3:21 PM MDTMesoscale DiscussionSPC84 min
Jun 25, 4:20 PM MDTSpecial Weather StatementBYZ40 min
Jun 25, 4:57 PM MDTSevere Thunderstorm WarningBYZ63 min
Jun 25, 5:11 PM MDTSpecial Weather StatementBYZ49 min
Jun 25, 5:54 PM MDTSpecial Weather StatementBYZ66 min
Jun 26, 7:12 AM MDTSpecial Weather StatementBYZ48 min
Jul 3, 12:37 AM MDTSpecial Weather StatementBYZ38 min
Jul 3, 2:35 PM MDTMesoscale DiscussionSPC115 min
Jul 3, 9:52 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ23 min
Jul 5, 12:51 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 5, 2:14 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 1:27 AM MDTHeat AdvisoryBYZ44 hr
Jul 17, 8:48 PM MDTSevere Thunderstorm WatchSPC4 hr
Jul 17, 10:41 PM MDTMesoscale DiscussionSPC94 min
Jul 17, 11:44 PM MDTSpecial Weather StatementBYZ61 min
Jul 19, 2:46 PM MDTMesoscale DiscussionSPC119 min
Jul 19, 4:10 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 19, 6:30 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ60 min
Jul 19, 7:22 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ53 min
Jul 19, 7:59 PM MDTSevere Thunderstorm WarningBYZ46 min
Jul 19, 8:11 PM MDTMesoscale DiscussionSPC64 min
Jul 19, 8:12 PM MDTSevere Thunderstorm WarningBYZ63 min
Jul 19, 9:14 PM MDTSevere Thunderstorm WarningBYZ44 min
Jul 20, 3:45 PM MDTMesoscale DiscussionSPC90 min
Jul 20, 4:09 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 20, 6:31 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ48 min
Jul 20, 6:55 PM MDTMesoscale DiscussionSPC95 min
Jul 20, 7:17 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ58 min
Jul 20, 8:12 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ33 min
Jul 20, 9:51 PM MDTSevere Thunderstorm WarningBYZ54 min
Jul 21, 1:59 PM MDTMesoscale DiscussionSPC2 hr
Jul 21, 3:34 PM MDTSevere Thunderstorm WatchSPC9 hr
Jul 21, 5:56 PM MDTMesoscale DiscussionSPC2 hr
Jul 21, 7:09 PM MDTSpecial Weather StatementBYZ36 min
Jul 22, 2:04 AM MDTSpecial Weather StatementBYZ56 min
Jul 25, 3:47 PM MDTMesoscale DiscussionSPC88 min
Jul 25, 5:27 PM MDTSpecial Weather StatementBYZ63 min
Jul 25, 5:43 PM MDTMesoscale DiscussionSPC2 hr
Jul 25, 5:52 PM MDTSevere Thunderstorm WarningBYZ53 min
Jul 25, 6:38 PM MDTSevere Thunderstorm WarningBYZ37 min
Jul 26, 4:34 PM MDTMesoscale DiscussionSPC116 min
Jul 26, 6:52 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 27, 12:43 AM MDTSpecial Weather StatementBYZ32 min
Jul 27, 10:24 AM MDTSpecial Weather StatementBYZ36 min
Jul 28, 4:02 AM MDTMesoscale DiscussionSPC118 min
Jul 28, 8:22 AM MDTSevere Thunderstorm WarningBYZ53 min
Jul 28, 9:13 AM MDTSevere Thunderstorm WarningBYZ62 min
Jul 28, 9:42 AM MDTMesoscale DiscussionSPC2 hr
Jul 28, 10:55 AM MDTSpecial Weather StatementBYZ35 min
Jul 28, 11:48 PM MDTSevere Thunderstorm WarningBYZ29 min
Jul 29, 2:28 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 1, 12:04 AM MDTSpecial Weather StatementBYZ41 min
Aug 7, 2:03 AM MDTSpecial Weather StatementBYZ42 min
Aug 7, 2:49 AM MDTSpecial Weather StatementBYZ56 min
Aug 7, 3:50 PM MDTSevere Thunderstorm WatchSPC7 hr
Aug 7, 6:28 PM MDTMesoscale DiscussionSPC2 hr
Aug 7, 9:00 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ75 min
Aug 7, 9:28 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ47 min
Aug 7, 9:30 PM MDTMesoscale DiscussionSPC2 hr
Aug 7, 10:10 PM MDTSevere Thunderstorm Warning Considerable damage threatBYZ22 min
Aug 18, 1:37 PM MDTHeat AdvisoryBYZ55 hr
Aug 19, 6:08 PM MDTSpecial Weather StatementBYZ37 min
Sep 1, 5:15 AM MDTSpecial Weather StatementBYZ3 hr
Sep 11, 12:19 AM MDTSpecial Weather StatementBYZ56 min
Sep 11, 1:09 AM MDTSpecial Weather StatementBYZ51 min
Sep 11, 2:10 AM MDTSpecial Weather StatementBYZ65 min
Sep 12, 10:27 PM MDTSpecial Weather StatementBYZ33 min
Sep 12, 10:59 PM MDTSpecial Weather StatementBYZ46 min
Oct 19, 12:10 PM MDTHigh Wind WatchBYZ14 hr
Nov 8, 12:14 AM MSTSpecial Weather StatementBYZ2 hr
Nov 24, 1:48 AM MSTWinter Weather AdvisoryBYZ33 hr
Nov 27, 1:07 PM MSTWinter Weather AdvisoryBYZ43 hr
Dec 7, 1:17 AM MSTHigh Wind WatchBYZ36 hr
Dec 8, 1:10 AM MSTHigh Wind WarningBYZ38 hr
Dec 8, 2:08 PM MSTWinter Weather AdvisoryBYZ58 hr
Dec 9, 4:18 PM MSTWinter Storm WatchBYZ46 hr
Dec 11, 2:22 AM MSTWinter Weather AdvisoryBYZ54 hr
Dec 16, 3:05 AM MSTHigh Wind WatchBYZ11 hr
Dec 16, 1:43 PM MSTHigh Wind WarningBYZ39 hr
Dec 17, 1:45 PM MSTWinter Weather AdvisoryBYZ18 hr
Dec 19, 3:17 AM MSTWinter Weather AdvisoryBYZ6 hr
Dec 22, 7:40 AM MSTSpecial Weather StatementBYZ95 min
Dec 27, 12:51 AM MSTCold Weather AdvisoryBYZ37 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 archive20242026

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.