Alert archive / Montana / Fallon County

Weather alerts in Fallon County, Montana, 2013

125 weather alerts in 2013, 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 2013. Tap one for its archive.

Alerts
125
Warnings
24
Watches
17
Advisories
22
Busiest month
July30 alerts
Busiest day
September 7, 20139 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.

Fallon County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings010%
Severe thunderstorm warnings181422%2090%26 min
Flash flood warnings110%3100%58 min

Each office's whole area, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Billings, MT: tornado warnings15287%540%7 min
NWS Billings, MT: severe thunderstorm warnings19611840%32075%24 min
NWS Billings, MT: flash flood warnings441566%3557%52 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 8, 3:51 PM MSTWinter Storm WatchBYZ36 hr
Jan 9, 4:06 PM MSTWinter Storm WarningBYZ60 hr
Jan 11, 2:35 PM MSTWinter Weather AdvisoryBYZ14 hr
Jan 19, 9:15 PM MSTWind Chill AdvisoryBYZ30 hr
Jan 29, 3:39 AM MSTWind Chill AdvisoryBYZ23 hr
Jan 30, 4:22 AM MSTWind Chill AdvisoryBYZ32 hr
Jan 31, 12:04 PM MSTWind Chill AdvisoryBYZ3 hr
Mar 3, 2:25 PM MSTWinter Weather AdvisoryBYZ31 hr
Mar 16, 3:16 AM MDTWinter Storm WatchBYZ12 hr
Mar 21, 4:00 AM MDTWinter Weather AdvisoryBYZ17 hr
Apr 7, 2:59 PM MDTWinter Weather AdvisoryBYZ24 hr
Apr 12, 3:20 PM MDTWinter Storm WatchBYZ24 hr
Apr 13, 3:42 PM MDTWinter Storm WarningBYZ30 hr
Apr 13, 10:51 PM MDTMesoscale DiscussionSPC5 hr
May 18, 8:23 PM MDTSevere Thunderstorm WarningBYZ22 min
May 23, 12:42 PM MDTHigh Wind WarningBYZ11 hr
May 25, 10:47 AM MDTSpecial Weather StatementBYZ58 min
May 25, 11:41 AM MDTSevere Thunderstorm WarningBYZ49 min
May 25, 11:43 AM MDTMesoscale DiscussionSPC92 min
May 25, 1:10 PM MDTSpecial Weather StatementBYZ35 min
May 25, 1:52 PM MDTTornado WatchSPC8 hr
May 25, 7:48 PM MDTMesoscale DiscussionSPC87 min
May 25, 11:09 PM MDTSpecial Weather StatementBYZ36 min
May 27, 11:51 AM MDTSevere Thunderstorm WatchSPC10 hr
May 27, 3:52 PM MDTMesoscale DiscussionSPC83 min
May 30, 3:29 AM MDTAreal Flood AdvisoryBYZ47 hr
Jun 3, 2:01 AM MDTSpecial Weather StatementBYZ44 min
Jun 11, 1:07 PM MDTSevere Thunderstorm WatchSPC8 hr
Jun 13, 12:37 PM MDTMesoscale DiscussionSPC53 min
Jun 13, 4:44 PM MDTMesoscale DiscussionSPC61 min
Jun 13, 8:06 PM MDTMesoscale DiscussionSPC54 min
Jun 14, 12:50 AM MDTSpecial Weather StatementBYZ55 min
Jun 21, 6:36 AM MDTSpecial Weather StatementBYZ39 min
Jun 22, 4:09 PM MDTSpecial Weather StatementBYZ51 min
Jun 22, 4:45 PM MDTFlash Flood WarningBYZ3 hr
Jun 24, 1:21 PM MDTMesoscale DiscussionSPC114 min
Jun 24, 6:39 PM MDTMesoscale DiscussionSPC96 min
Jul 5, 3:40 PM MDTSpecial Weather StatementBYZ35 min
Jul 7, 4:09 AM MDTSpecial Weather StatementBYZ51 min
Jul 7, 4:00 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 7, 6:31 PM MDTMesoscale DiscussionSPC119 min
Jul 8, 3:42 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 4:01 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 8, 4:58 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 5:51 PM MDTSevere Thunderstorm WarningBYZ54 min
Jul 8, 6:39 PM MDTSevere Thunderstorm WarningBYZ51 min
Jul 8, 7:29 PM MDTSevere Thunderstorm WarningBYZ61 min
Jul 8, 7:42 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 8:19 PM MDTSevere Thunderstorm WarningBYZ56 min
Jul 11, 2:55 PM MDTMesoscale DiscussionSPC65 min
Jul 11, 3:46 PM MDTSpecial Weather StatementBYZ44 min
Jul 11, 3:50 PM MDTSevere Thunderstorm WatchSPC5 hr
Jul 11, 4:43 PM MDTSpecial Weather StatementBYZ47 min
Jul 13, 2:08 PM MDTMesoscale DiscussionSPC67 min
Jul 13, 2:47 PM MDTSevere Thunderstorm WatchSPC6 hr
Jul 13, 3:52 PM MDTSpecial Weather StatementBYZ53 min
Jul 13, 5:03 PM MDTSpecial Weather StatementBYZ57 min
Jul 13, 5:33 PM MDTMesoscale DiscussionSPC87 min
Jul 15, 1:51 PM MDTMesoscale DiscussionSPC84 min
Jul 15, 2:48 PM MDTTornado WatchSPC8 hr
Jul 15, 6:27 PM MDTMesoscale DiscussionSPC63 min
Jul 20, 9:10 PM MDTSevere Thunderstorm WarningBYZ50 min
Jul 24, 6:32 PM MDTSpecial Weather StatementBYZ43 min
Jul 24, 7:48 PM MDTMesoscale DiscussionSPC87 min
Jul 28, 5:58 PM MDTSpecial Weather StatementBYZ47 min
Jul 30, 5:25 AM MDTSpecial Weather StatementBYZ65 min
Jul 30, 3:37 PM MDTMesoscale DiscussionSPC2 hr
Aug 3, 1:17 PM MDTMesoscale DiscussionSPC118 min
Aug 3, 1:50 PM MDTSevere Thunderstorm WatchSPC9 hr
Aug 3, 5:44 PM MDTMesoscale DiscussionSPC61 min
Aug 3, 8:29 PM MDTSevere Thunderstorm WarningBYZ61 min
Aug 3, 9:05 PM MDTSpecial Weather StatementBYZ40 min
Aug 3, 9:26 PM MDTSevere Thunderstorm WarningBYZ64 min
Aug 4, 12:59 AM MDTSpecial Weather StatementBYZ46 min
Aug 5, 2:31 PM MDTMesoscale DiscussionSPC89 min
Aug 5, 5:28 PM MDTSevere Thunderstorm WarningBYZ62 min
Aug 5, 6:27 PM MDTSevere Thunderstorm WarningBYZ63 min
Aug 10, 2:48 PM MDTMesoscale DiscussionSPC87 min
Aug 10, 6:14 PM MDTSpecial Weather StatementBYZ61 min
Aug 10, 7:17 PM MDTSpecial Weather StatementBYZ58 min
Aug 10, 7:41 PM MDTSevere Thunderstorm WarningBYZ64 min
Aug 13, 2:22 PM MDTMesoscale DiscussionSPC2 hr
Aug 14, 9:07 PM MDTSpecial Weather StatementBYZ53 min
Aug 14, 10:18 PM MDTSpecial Weather StatementBYZ42 min
Aug 14, 11:00 PM MDTSpecial Weather StatementBYZ45 min
Aug 23, 12:03 AM MDTSpecial Weather StatementBYZ57 min
Aug 28, 2:54 PM MDTMesoscale DiscussionSPC96 min
Aug 28, 4:23 PM MDTSevere Thunderstorm WatchSPC8 hr
Aug 28, 7:55 PM MDTMesoscale DiscussionSPC95 min
Aug 28, 9:18 PM MDTSevere Thunderstorm WarningBYZ57 min
Aug 28, 11:14 PM MDTSpecial Weather StatementBYZ61 min
Sep 7, 9:49 AM MDTFlash Flood WatchBYZ40 hr
Sep 7, 10:55 AM MDTSpecial Weather StatementBYZ50 min
Sep 7, 2:24 PM MDTMesoscale DiscussionSPC2 hr
Sep 7, 3:00 PM MDTSevere Thunderstorm WarningBYZ60 min
Sep 7, 3:58 PM MDTSevere Thunderstorm WarningBYZ47 min
Sep 7, 4:09 PM MDTSpecial Weather StatementBYZ51 min
Sep 7, 4:21 PM MDTSevere Thunderstorm WarningBYZ54 min
Sep 7, 4:21 PM MDTSevere Thunderstorm WatchSPC7 hr
Sep 7, 5:12 PM MDTSevere Thunderstorm WarningBYZ63 min
Sep 7, 6:16 PM MDTSevere Thunderstorm WarningBYZ29 min
Sep 7, 6:50 PM MDTMesoscale DiscussionSPC115 min
Sep 8, 3:52 PM MDTMesoscale DiscussionSPC2 hr
Sep 8, 6:47 PM MDTSevere Thunderstorm WatchSPC6 hr
Sep 17, 5:17 PM MDTSpecial Weather StatementBYZ58 min
Sep 17, 6:29 PM MDTMesoscale DiscussionSPC61 min
Sep 17, 7:34 PM MDTSpecial Weather StatementBYZ56 min
Sep 17, 8:14 PM MDTSpecial Weather StatementBYZ61 min
Sep 18, 1:16 PM MDTMesoscale DiscussionSPC89 min
Oct 27, 3:59 PM MDTWinter Weather AdvisoryBYZ29 hr
Nov 10, 9:47 AM MSTWinter Weather AdvisoryBYZ23 hr
Nov 19, 3:55 AM MSTWinter Weather AdvisoryBYZ47 hr
Nov 30, 3:06 PM MSTWinter Storm WarningBYZ3 days
Dec 1, 4:07 AM MSTWinter Storm WatchBYZ24 hr
Dec 2, 3:51 AM MSTWinter Weather AdvisoryBYZ47 hr
Dec 4, 2:47 AM MSTWinter Weather AdvisoryBYZ20 hr
Dec 4, 10:45 PM MSTWind Chill AdvisoryBYZ64 hr
Dec 6, 11:08 PM MSTWind Chill WarningBYZ12 hr
Dec 8, 3:59 AM MSTWind Chill AdvisoryBYZ31 hr
Dec 8, 3:59 AM MSTWinter Weather AdvisoryBYZ65 hr
Dec 18, 4:00 AM MSTWinter Weather AdvisoryBYZ36 hr
Dec 21, 2:57 AM MSTWinter Weather AdvisoryBYZ41 hr
Dec 23, 8:15 PM MSTFreezing Rain AdvisoryBYZ14 hr
Dec 28, 2:57 AM MSTWind Chill AdvisoryBYZ20 hr
Dec 31, 3:32 AM MSTWinter Weather AdvisoryBYZ38 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 archive20122014

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.