Mid-October snowstorm brought significant snowfall to portions of east-central Wyoming and the North Laramie Range on the 19th. Douglas received 6 inches of snowfall while the North Laramie Range received over a foot.
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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 CYS wrote it up.
Mid-October snowstorm brought significant snowfall to portions of east-central Wyoming and the North Laramie Range on the 19th. Douglas received 6 inches of snowfall while the North Laramie Range received over a foot. Additionally, a few spots west of the Laramie Range received a few inches of snow accumulation.
The national radar mosaic for the moment the first event began.
5 winter weather, 3 heavy snow. Local standard time, as filed.
Estimated 11 inches of snow accumulation at the Sand Lake SNOTEL site (Elevation 10050 feet) in the Snowy Range with 1.1 inches of snow water equivalent and 10:1 snow ratios. Nearby SNOTELs above 10,000 feet elevation estimated around 10 inches.
Estimated 4.8 inches of snow accumulation at the Crow Creek SNOTEL site (Elevation 8330 feet) in the South Laramie Range with 0.6 inches of snow water equivalent and 8:1 snow ratios. Interstate 80 between Cheyenne and Laramie was closed due to winter conditions for around 4 hours.
Received report on social media of 5.3 inches of snow accumulation 1 mile northwest of Lusk.
Received report from US Department of Agriculture Forest Service office in Douglas of 6 inches of snow accumulation.
Estimated 14 inches of snow accumulation at the Windy Peak SNOTEL site (Elevation 7900 feet) in the North Laramie Range with 1.4 inches of snow water equivalent and 10:1 snow ratios. Additionally, received report from social media of 12.5 inches of snow accumulation from 21 miles east-northeast of Shirley Basin.
Estimated 5 inches of snow on the ground.
Observer WY-CR-18 located 0.3 miles southwest Elk Mountain measured 7.1 inches of snow accumulation. Nearby WYDOT sensors along Interstate 80 reported moderate to heavy snow and visibility under one-half mile for multiple hours. Additionally, another observer in the area reported 6.5 inches of snow accumulation.
Multiple reports of 4 to 5 inches of snow accumulation around Laramie including 5 inches at CoCoRaHS station WY-AB-117 located 0.8 miles north of Laramie.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2021Every state in 2021This day in weather historyWarnings in Wyoming, October 2021
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: 984267, 984269, 984263, 984264, 984265, 984266, 984270, 984268.