Another storm system brought extremely heavy snow to the southeastern Idaho mountains and widespread snow across the entire region.

Heavy Snow in BLACKFOOT MOUNTAINS, IDAHO
From 10-DEC-22 03:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ten inches of snow fell in Soda Springs.

Heavy Snow in FRANK CHURCH WILDERNESS, IDAHO
From 10-DEC-22 05:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

An estimated 17.6 inches of snow fell at the Mill Creek Summit SNOTEL site.

Heavy Snow in LOST RIVER RANGE, IDAHO
From 10-DEC-22 04:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

An estimated 16.6 inches of snow fell at the Hilt's Creek SNOTEL.

Heavy Snow in LOST RIVER VALLEYS, IDAHO
From 09-DEC-22 21:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy snow fell over an extended period of time.  Due to the road condition Butte County School District 111 was closed on the 12th.   Observed snowfall totals were 13.5 inches in Howe, 13 inches in Moore, and 12 inches in Mackay.

Heavy Snow in SAWTOOTH-STANLEY BASIN, IDAHO
From 09-DEC-22 20:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

An estimated 34 inches of snow fell at the Vienna Mine SNOTEL site.   7 inches fell in Stanley.

Heavy Snow in WOOD RIVER FOOTHILLS, IDAHO
From 09-DEC-22 20:00:00 to 12-DEC-22 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Extended period snow amounts were 18.8 inches by the Bellevue COOP observer and 20 inches by a spotter near Hailey.   Blaine County School District was closed on the 12th due to the road conditions.

Heavy Snow in BEAR LAKE VALLEY, IDAHO
From 10-DEC-22 01:00:00 to 12-DEC-22 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy snow reports were 6 inches in Montpelier and 9 inches in Bern.

Heavy Snow in ARCO-MUD LAKE DESERT, IDAHO
From 09-DEC-22 21:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy snow combined with winds caused poor road conditions which closed butte County School District 111 on the 12th.   The Craters of the Moon COOP site recorded 14 inches of snow during the storm.

Heavy Snow in BEAR RIVER RANGE, IDAHO
From 10-DEC-22 03:00:00 to 12-DEC-22 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

SNOTEL estimated snow amounts were 15 inches at Emigrant Summit and Franklin Basin.

Heavy Snow in BEAVERHEAD-LEMHI HIGHLANDS, IDAHO
From 10-DEC-22 03:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts were 7.5 inches by the Dubois COOP observer and 18.2 inches by the Small COOP observer.

Winter Weather in MARSH AND ARBON HIGHLANDS, IDAHO
From 09-DEC-22 22:00:00 to 12-DEC-22 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A total of 11.5 inches of snow fell over an extended event at Inkom. The event was a very long duration storm with lesser amounts, generally below 8 inches, falling at lower elevations.

Heavy Snow in BIG LOST HIGHLANDS-COPPER BASIN, IDAHO
From 10-DEC-22 03:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Estimated SNOTEL amounts were the following:  Bear Canyon 23 inches, Garfield Ranger Station 19 inches, Smiley Mountain 33 inches, Stickney Mill 15 inches, and Swede Peak 33 inches.

Winter Weather in FRANKLIN-EASTERN ONEIDA REGION, IDAHO
From 10-DEC-22 05:00:00 to 12-DEC-22 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Over the extended event COOP observers reported 5 inches in Preston and 6 inches in McCammon.

Winter Weather in LOWER SNAKE RIVER PLAIN, IDAHO
From 10-DEC-22 05:00:00 to 12-DEC-22 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An extended period of snow dropped 4 to 6 inches of snow in the Pocatello and Chubbuck area from the 10th into the 12th.

Winter Weather in UPPER SNAKE RIVER PLAIN, IDAHO
From 10-DEC-22 05:00:00 to 12-DEC-22 23:00:00 (MST-7)
Crop damage: 0.00K
Reported by: COOP Observer

A long period of snow brought widespread 6 to 8 inches of snow to the region.   Over 50 accidents were reported by Bonneville County police department on the 12th.

Heavy Snow in MARSH AND ARBON HIGHLANDS, IDAHO
From 09-DEC-22 22:00:00 to 12-DEC-22 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A total of 11.5 inches of snow fell over an extended event at Inkom.

Avalanche in SUN VALLEY REGION, IDAHO
From 11-DEC-22 03:00:00 to 12-DEC-22 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

An avalanche brought debris across highway 75 and it was shut down going over Galena Summit on the 11th and 12th.  It was closed from 22 miles north of Ketchum to 24 miles sough of Stanley.

Heavy Snow in SUN VALLEY REGION, IDAHO
From 09-DEC-22 20:00:00 to 12-DEC-22 22:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Extremely heavy snow fell in the Sun Valley area with 24 to 28 inches measured in Ketchum and Sun Valley.   SNOTEL site amounts were estimated to be the following:  Chocolate Gulch 27 inches, Dollarhide Summit 27 inches, Galena 19 inches, Galena Summit 29 inches, Hyndman 17 inches, and Lost Wood Divide 27 inches.  Blaine County School District was closed on the 12th due to road conditions.