Western Lemhi County storm history

The Skull Gulch RAWS at 5,878 feet recorded gusts between 60 and 73 mph between 0851MST and 1051MST. Utility companies reported power outages due to trees down across southeastern Idaho.

Nine to ten inches of snow were reported on Williams Creek Summit. Given that high elevation stations like the Red Rock Peak RAWS recorded westerly winds of 15 to 31 mph, blowing and drifting snow were likely occurring at the summit.

The Red Rock Complex wildfire took a 11 mile run due to the 50 to 60 mph winds and dry conditions.

The Indianola RAWS located west of Shoup recorded its highest temperature of 105 degrees on the 23rd.

Snow totals include: 6 to 8 inches at Williams Creek Summit and 15 inches in Cobalt.

The Morgan Creek SNOTEL at 7600 feet reported a snow depth increase of 10 inches with 0.80 inches of snow water equivalent. An estimated foot of snow fell at Williams Creek Summit by a county official.

Williams Creek Summit received between 18 and 24 inches of snowfall.

Impacts were difficult to find. However, 12 customers lost power, and a max gust of 64 mph was measured at the Skull Gulch RAWS.

Valley lows in the lower to mid 30s caused damage to sensitive vegetation.

Up to two feet of snow fell near Williams Creek Summit, which caused numerous trees to break or fall over the road, making travel impossible for much of the day. Approximately 14 inches of wet snow fell at Lost Trail Pass adversely impacting travel.

Snow amounts of 4 to 8 inches were observed above 4000 feet with some locations above 7000 feet, recording over 12 inches of snow. Also, wind gusts to 30 mph were observed on the higher terrain. Backcountry users experienced difficult travel.

Heavy snowfall impacted travel over Williams Creek Summit, where 13 inches of snowfall was reported.

Anywhere from 2 inches in the valleys to 8 inches in the mountains fell with this event. The cold front moved through on the evening of Dec. 4th which created gusty winds between 20 and 36 mph, falling temperatures, and blowing snow with below zero wind chills at Williams Creek S…

Weather obs reported temperatures down in the low to mid 20s for valleys in Western Lemhi County.

Williams Creek received 12 to 16 inches of snowfall during this period. Blowing snow was also reported.

The Morgan Creek SNOTEL at 7600 ft reported light snow overnight, with nearby winds at Skull Gulch gusting to 56 mph, making for dangerous back-country conditions.

A person from the public reported up to 5 inches of snow in the higher terrain in the vicinity of Carmen Creek area. According to nearby sensors, this snow fell in a short amount of time associated with the cold front passage.

The Morgan Creek SNOTEL located 30 miles southwest of Salmon at 7,600 ft. measured 5 inches of snow.

A 62 mph wind gust was measured 10 miles west southwest of Shoup.

A spotter measured 9 total inches of snowfall north northeast of Leadore. 5 inches fell between 9am and 9pm on the 17th, with 4 inches falling between 9pm and 9am on the 18th.

The Skull Gulch RAWS, 11 miles west-southwest of Shoup, reported a gust of 81 mph.

Road crews reported that one of the avalanches blocked nearly a quarter mile section of the road near Halfway Gulch with snow 10 feet deep on the downhill side of the road.