Alert archive / Wyoming / Park County

Weather alerts in Park County, Wyoming, 2026

91 weather alerts in 2026, 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 2026. Tap one for its archive.

Alerts
91
Warnings
29
Watches
27
Advisories
17
Busiest month
July22 alerts
Busiest day
August 18, 20265 alerts

Over time

By month

Warning verification

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

Park County, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10100%40%
Flash flood warnings00

Each office's whole area, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Riverton, WY: tornado warnings110%333%2 min
NWS Riverton, WY: severe thunderstorm warnings631970%12731%26 min
NWS Riverton, WY: flash flood warnings3233%367%79 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

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, 1:27 AM MSTWinter Weather AdvisoryRIW58 hr
Jan 5, 1:47 PM MSTWinter Weather AdvisoryRIW51 hr
Feb 8, 1:14 AM MSTWinter Weather AdvisoryRIW40 hr
Feb 15, 10:43 AM MSTWinter Weather AdvisoryRIW50 hr
Feb 16, 9:40 AM MSTHigh Wind WarningRIW33 hr
Feb 17, 12:16 PM MSTWinter Weather AdvisoryRIW47 hr
Feb 22, 11:23 AM MSTHigh Wind WatchRIW13 hr
Feb 22, 11:42 AM MSTWinter Storm WatchRIW14 hr
Feb 23, 12:45 AM MSTHigh Wind WarningRIW40 hr
Feb 23, 1:12 AM MSTWinter Storm WarningRIW64 hr
Feb 25, 2:51 AM MSTHigh Wind WatchRIW23 hr
Feb 26, 1:59 AM MSTHigh Wind WarningRIW40 hr
Mar 4, 1:16 PM MSTWinter Weather AdvisoryRIW51 hr
Mar 7, 1:48 AM MSTHigh Wind WatchRIW10 hr
Mar 7, 11:34 AM MSTHigh Wind WarningRIW34 hr
Mar 10, 11:36 AM MDTHigh Wind WatchRIW23 hr
Mar 11, 2:24 AM MDTWinter Storm WatchRIW8 hr
Mar 11, 3:01 AM MDTHigh Wind WarningRIW45 hr
Mar 11, 10:51 AM MDTWinter Weather AdvisoryRIW37 hr
Mar 13, 2:12 AM MDTWinter Storm WatchRIW11 hr
Mar 13, 12:54 PM MDTHigh Wind WarningRIW34 hr
Mar 13, 1:23 PM MDTWinter Weather AdvisoryRIW34 hr
Mar 14, 6:43 PM MDTMesoscale DiscussionSPC4 hr
Mar 17, 2:23 AM MDTFire Weather WatchRIW11 hr
Mar 17, 1:19 PM MDTRed Flag WarningRIW61 hr
Mar 20, 2:02 AM MDTRed Flag WarningRIW43 hr
Mar 23, 2:48 AM MDTFire Weather WatchRIW33 hr
Mar 24, 11:29 AM MDTRed Flag WarningRIW58 hr
Mar 27, 1:24 AM MDTFire Weather WatchRIW13 hr
Mar 27, 2:02 PM MDTFire Weather WatchRIW24 hr
Mar 27, 2:02 PM MDTRed Flag WarningRIW3 days
Apr 1, 1:47 AM MDTWinter Storm WatchRIW9 hr
Apr 1, 11:14 AM MDTWinter Storm WarningRIW55 hr
Apr 2, 2:17 AM MDTWinter Weather AdvisoryRIW40 hr
Apr 11, 2:44 PM MDTMesoscale DiscussionSPC2 hr
Apr 12, 2:48 PM MDTMesoscale DiscussionSPC117 min
Apr 14, 1:10 AM MDTWinter Storm WatchRIW24 hr
Apr 15, 12:40 AM MDTWinter Storm WarningRIW53 hr
Apr 16, 1:35 PM MDTFreeze WarningRIW43 hr
Apr 21, 1:23 AM MDTFire Weather WatchRIW24 hr
Apr 21, 2:45 AM MDTWinter Weather AdvisoryRIW68 hr
Apr 22, 1:27 AM MDTRed Flag WarningRIW19 hr
Apr 23, 6:24 PM MDTSpecial Weather StatementRIW66 min
May 3, 1:06 PM MDTFreeze WatchRIW34 hr
May 4, 11:05 PM MDTFreeze WarningRIW34 hr
May 13, 1:52 PM MDTSevere Thunderstorm WatchSPC6 hr
May 13, 4:27 PM MDTSevere Thunderstorm WarningRIW63 min
May 16, 11:52 AM MDTWinter Weather AdvisoryRIW54 hr
May 18, 5:57 PM MDTFreeze WarningRIW15 hr
Jun 24, 7:38 PM MDTSpecial Weather StatementRIW37 min
Jun 25, 5:10 PM MDTSpecial Weather StatementRIW35 min
Jul 8, 1:39 PM MDTMesoscale DiscussionSPC2 hr
Jul 8, 5:05 PM MDTSpecial Weather StatementRIW25 min
Jul 9, 10:11 AM MDTExtreme Heat WatchRIW16 hr
Jul 10, 1:59 AM MDTExtreme Heat WarningRIW5 days
Jul 10, 9:30 AM MDTFire Weather WatchRIW24 hr
Jul 11, 9:15 AM MDTRed Flag WarningRIW37 hr
Jul 13, 4:21 PM MDTSpecial Weather StatementRIW24 min
Jul 15, 1:03 PM MDTMesoscale DiscussionSPC87 min
Jul 15, 2:36 PM MDTSpecial Weather StatementRIW39 min
Jul 15, 3:04 PM MDTSpecial Weather StatementRIW26 min
Jul 16, 1:49 AM MDTFlood WatchRIW21 hr
Jul 17, 1:55 AM MDTFlood WatchRIW20 hr
Jul 17, 3:09 PM MDTAreal Flood AdvisoryRIW3 hr
Jul 17, 3:48 PM MDTAreal Flood AdvisoryRIW3 hr
Jul 18, 2:37 AM MDTFlood WatchRIW19 hr
Jul 18, 2:10 PM MDTAreal Flood AdvisoryRIW3 hr
Jul 21, 1:57 AM MDTFlood WatchRIW66 hr
Jul 22, 3:21 PM MDTAreal Flood AdvisoryRIW3 hr
Jul 24, 11:26 AM MDTHeat AdvisoryRIW58 hr
Jul 26, 2:26 PM MDTMesoscale DiscussionSPC94 min
Jul 31, 12:49 AM MDTHeat AdvisoryRIW68 hr
Jul 31, 9:54 AM MDTFire Weather WatchRIW28 hr
Aug 1, 1:28 PM MDTRed Flag WarningRIW56 hr
Aug 7, 12:27 PM MDTRed Flag WarningRIW57 hr
Aug 10, 2:23 AM MDTRed Flag WarningRIW19 hr
Aug 10, 2:00 PM MDTRed Flag WarningRIW31 hr
Aug 17, 6:03 PM MDTSpecial Weather StatementRIW27 min
Aug 18, 1:51 PM MDTMesoscale DiscussionSPC84 min
Aug 18, 2:31 PM MDTSevere Thunderstorm WatchSPC5 hr
Aug 18, 4:32 PM MDTSpecial Weather StatementRIW28 min
Aug 18, 5:08 PM MDTSpecial Weather StatementRIW37 min
Aug 23, 1:19 PM MDTMesoscale DiscussionSPC116 min
Aug 28, 10:43 AM MDTFlood WatchRIW41 hr
Sep 2, 2:05 AM MDTFire Weather WatchRIW7 hr
Sep 2, 9:22 AM MDTRed Flag WarningRIW36 hr
Sep 3, 11:12 AM MDTRed Flag WarningRIW34 hr
Sep 7, 12:52 AM MDTRed Flag WarningRIW18 hr
Sep 8, 12:58 AM MDTRed Flag WarningRIW68 hr
Sep 13, 11:10 AM MDTHigh Wind WarningRIW27 hr
Sep 17, 10:33 AM MDTFlood WatchRIW3 days

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 archive2025

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.