High wind event across Natrona County and southern portions of Fremont County. Gusts to 66 mph at KTWO radio station in Casper, and sustained 40 to 50 mph winds across parts of southern Fremont County.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS RIW wrote it up.
High wind event across Natrona County and southern portions of Fremont County. Gusts to 66 mph at KTWO radio station in Casper, and sustained 40 to 50 mph winds across parts of southern Fremont County.
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 1999Every state in 1999This day in weather historyWarnings in Wyoming, December 1999
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5720807, 5720808.