An anomalous moisture plume brought over a foot of snow to the mountains while a combination of snow and wind brought high impact to the Camas Prairie.
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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 MSO wrote it up.
An anomalous moisture plume brought over a foot of snow to the mountains while a combination of snow and wind brought high impact to the Camas Prairie.
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 Missoula, MT wrote its last area forecast discussion before the first event at Dec 1, 2:09 AM PST, 51 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
3 heavy snow, 2 winter weather. Local standard time, as filed.
Very heavy snow rates were observed by SNOTEL stations and the webcam at Grangemont corroborated this. The Hemlock Butte SNOTEL picked up close to 10 inches of snow in 9 hours.
The Gibbonsville COOP reported 5.2 inches of snow while Leadore only received 0.4 inches. The Saddle Mountain SNOTEL above Lost Trail Ski Resort reported 9 inches of snow.
An observer in Grangeville reported close to a foot of heavy snow that fell in 10 hours. A spotter located 5 miles southwest of Grangeville received 14 inches. Another spotter located 7.3 miles southeast of Kooskia received 12.5 inches. Spotters mentioned that the driving conditions were scary with vehicles getting stuck during the storm. Power outages were reported south of Grangeville.
The ITD snow depth sensor at Powell on US-12 reported very heavy snow, 4.4 inches in 3 hours, during the morning hours associated with the passage of the cold front. Other snow amounts include around 7 inches Lolo Pass and Mountain Meadows. The Elk City sensor reported heavy snow throughout the day.
Whitebird Hill on US-95 received heavy snow with ITD mentioning that snow chains were recommended. A spotter located on a bench at 4150 feet, 9 miles southwest of Whitebird Hill received around 7 inches of snow. Power outages were reported south of Grangeville.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2022Every state in 2022This day in weather historyWarnings in Idaho, December 2022
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: 1062802, 1063886, 1063861, 1063705, 1063879.