A vigorous, cold storm system swept through the Cowboy state Saturday night and Sunday. This system produced widespread precipitation across the region. There was plenty of cold air for significant snowfall across the northwest and northern mountains including Yellowstone National Park. Snowfall totals generally ranged between 5 and 10 inches. There was even enough cold air for the lower elevations of the Big Horn Basin to receive snow. Snow was recorded in Greybull and Worland, but the bulk of the snow in the Big Horn Basin fell in the Cody Foothills and extreme northern Big Horn County where one to three inches fell. Snow accumulations in the lower elevations were mainly on the grassy areas. Trace amounts of snow were also recorded in Buffalo, Riverton, and Lander.
Daytime temperatures were extremely cold for this time of year especially east of the Divide. Daytime highs on Sunday were generally 30 to 35 degrees below average east of the Divide, and about 10 to 20 degrees below average west of the Divide. Normal highs for early June are generally in the 70s.
Here is a listing of daytime highs on Sunday between 6 a.m. and 6 p.m., and preliminary snowfall totals across the area.
Location Snowfall Totals Daytime Highs
Big Horn County...
Bone Springs SNOTEL 10.0 inches
Shell Creek SNOTEL 7.0 inches
Greybull Airport Trace (GEY) 43 Degrees
South Pass SNOTEL 3.0 inches
Hobbs Park SNOTEL 2.0 inches
Beaver Rim 0.5 inches
Riverton Airport Trace (RIW) 45 Degrees
Lander Airport Trace (LND) 42 Degrees
Hot Springs County...
Owl Creek SNOTEL 7.0 inches
Cloud Peak Reservoir SNOTEL 4.0 inches
Hansen Sawmill SNOTEL 4.0 inches
Buffalo Airport Trace (BYG) 41 Degrees
Casper Airport None (CPR) 49 Degrees
Casper Mountain 0.3 inches
Kirwin SNOTEL 11.0 inches
Beartooth Lake SNOTEL 9.0 inches
Blackwater SNOTEL 9.0 inches
Crandall Creek 6.5 inches
Evening Star SNOTEL 6.0 inches
Wolverine SNOTEL 5.0 inches
Powell 11.8 W 3.1 inches
Cody 2 - 3 inches
Meeteetse 2.0 inches
Gunsight SNOTEL 5.0 inches
Big Piney Airport None (BPI) 56 Degrees
Pinedale Airport None (PNA) 54 Degrees
Rock Springs Airport None (RKS) 59 Degrees
Grand Targhee SNOTEL 3.0 inches
Jackson Airport None (JAC) 54 Degrees
Worland Airport Trace (WRL) 45 Degrees
Yellowstone National Park...
Two Ocean Plateau SNOTEL 9.0 inches
Sylvan Road SNOTEL 6.0 inches
Lewis Lake Divide SNOTEL 5.0 inches
Thumb Divide SNOTEL 4.0 inches
East Entrance 3.0 inches
Lake Yellowstone Missing (P60) 40 Degrees
SNOTEL...SNOpack TELemetry for mountain sites