Strong northwest flow in the wake of a passing upper-level disturbance along with a breaking mountain wave led to high wind in the Cody Foothills. The highest gusts were recorded to the west of Clark, where gusts of 89 mph and 76 mph were recorded during the evening of October 30.
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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.
Strong northwest flow in the wake of a passing upper-level disturbance along with a breaking mountain wave led to high wind in the Cody Foothills. The highest gusts were recorded to the west of Clark, where gusts of 89 mph and 76 mph were recorded during the evening of October 30. Frequent gusts of 60 mph to 70 mph were also measured over the same 3-hour evening period. Strong winds also reached Cody on Halloween afternoon, when wind gusts of 58 mph were recorded at the sheriff's office.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before the first event at Oct 30, 1:33 PM MST, 5 hours 40 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
Numerous wind gusts past 58 mph were recorded near Clark including peak speeds of 76 and 89 mph.
Winds were sustained at over 40 mph with gusts to 58 mph in Cody.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2015Every state in 2015This day in weather historyWarnings in Wyoming, October 2015
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 2026-10-01. Each event’s entry at NCEI: 603476, 603477.