Idaho, 2025Heavy Snow and Winter Weather in Idaho, December 4 to 6, 2025
December 4 to 6, 2025 · NWS MSO · 4 events in 4 counties and zones
A potent atmospheric river moved into the Northern Rockies between December 4 and 7, delivering significant mountain snowfall.
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 4
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.
A potent atmospheric river moved into the Northern Rockies between December 4 and 7, delivering significant mountain snowfall.
Heavy Snow, Southern Clearwater Mountains
- When
- December 4, 8:00 AM PST to December 5, 11:00 PM PST
- Where
- Southern Clearwater Mountains forecast zone
- Reported by
- COOP Observer
- Coordinates
- 45.844, -115.467 (the zone’s center; the record gives no point)
Between 6 and 7 inches of snow fell between Elk City and Dixie, while the mountains, including both Lolo Pass and Red River Hot Springs, saw much heavier totals of 1 to 2 feet. Precipitation changed to freezing rain at Elk City during the evening of December 5, but air temperatures rose above freezing by midnight.
Heavy Snow, Northern Clearwater Mountains
- When
- December 4, 9:00 AM PST to December 5, 9:00 AM PST
- Where
- Northern Clearwater Mountains forecast zone
- Reported by
- Department of Highways
- Coordinates
- 46.674, -115.657 (the zone’s center; the record gives no point)
The period of highest impact occurred between 0900PST and 1515PST on December 4, when snowfall rates near 1 inch per hour frequently reduced visibility to less than one mile. The Grangemont area received an estimated 8 inches of new snowfall during that period. The snow changed to freezing rain at night in the lower elevations. The surrounding mountains received 8 to 14 inches of new snowfall.
Winter Weather, Orofino / Grangeville Region
- When
- December 4, 9:30 AM PST to December 5, 5:00 AM PST
- Where
- Orofino / Grangeville Region forecast zone
- Reported by
- CoCoRaHS
- Coordinates
- 46.259, -115.562 (the zone’s center; the record gives no point)
A period of light to moderate snow resulted in widespread minor accumulations across the lower elevations, including 1.8 inches in Cottonwood, 3.5 inches near Orofino, and 4.4 inches in Woodland. As the system progressed, snow transitioned to rain, causing temperatures to fluctuate and potentially leading to the formation of black ice on road surfaces.
Winter Weather, Eastern Lemhi County
- When
- December 4, 3:00 PM MST to December 6, 5:00 AM MST
- Where
- Eastern Lemhi County forecast zone
- Reported by
- COOP Observer
- Coordinates
- 44.943, -113.933 (the zone’s center; the record gives no point)
Snowfall totals ranged from 1.5 inches in Salmon, to 6.7 inches in Gibbonsville, to over a foot of snow at Lost Trail Pass. Snowfall changed to rain in the Salmon area at night while low temperatures were below freezing which implies black ice issues.
- Heavy Snow
- Snowfall reaching the local warning threshold without the other hazards of a winter storm.
- Winter Weather
- Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Winter Weather in New York, December 4, 20251 death · 1 event
- Winter Weather and Astronomical Low Tide in New York, December 4, 20258 events
- Heavy Snow and Winter Weather in Montana, December 4 to 7, 20258 events
- Heavy Snow in Idaho, December 4 to 6, 20258 events
- Winter Storm and Heavy Snow in Virginia, December 4 to 5, 20257 events
- Flash Flood and Astronomical Low Tide in Louisiana, December 4 to 8, 20256 events
- Heavy Snow and Winter Weather in Colorado, December 4 to 7, 20256 events
- Heavy Snow and Winter Weather in Montana, December 4 to 6, 20255 events
- High Wind in Wyoming, December 4 to 5, 202563 kt wind · 3 events
- Winter Weather in New Hampshire, December 4, 20253 events
- Heavy Snow and Winter Weather in Wyoming, December 4 to 6, 20253 events
- Marine High Wind in Lake Superior, December 4, 202550 kt wind · 2 events
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 2026-09-30. Each event’s entry at NCEI: 1304366, 1304356, 1304367, 1304368.