Weather alerts in Wyoming

By year

Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.

By month of the year

From 2008 to 2025, 64% of tornado reports in Wyoming fell inside a tornado warning issued on average 15 minutes before, and 67% of the tornado warnings had no report inside them.

Tornado warnings by year

Severe thunderstorm warnings by year

Flash flood warnings by year

Years from 2008, the first full year of storm-based warnings. The year still running is on its own page.

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.

• Laramie County6,685
• Albany County4,752
• Fremont County4,675
• Platte County4,466
• Natrona County3,771
• Goshen County3,707
• Crook County3,625
• Johnson County3,406
• Weston County3,332
• Carbon County3,233
• Campbell County3,054
• Niobrara County2,905
• Converse County2,681
• Hot Springs County2,571
• Park County2,352
• Sublette County2,256
• Sweetwater County2,223
• Sheridan County2,111
• Lincoln County2,044
• Big Horn County2,009
• Teton County1,995
• Washakie County1,981
• Uinta County1,070

Alerts in force nowTornadoes on recordThe radar archive

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.