Up to 1 foot of snow fell in the Wind River Mountains yesterday, and up to 6 inches of snow fell in the Bighorn and Absaroka ranges. At lower elevations, up to an inch of rain fell. This was due to the presence of an upper-level low over the Northern Rockies with upper-level disturbances rotating about its southern side.
More than 10 inches of snow water within 4 to 6 feet of snow remains in the mountains of the northwestern part of the region, with the Uinta, Wasatch, and the San Juans, with more than 40 inches of water and 6 to 8 feet of snow. Where the snow fell this weekend, the average snowpack temperature cooled; the temperatures remained very warm across most of the rest of the region's snowpack. Snowmelt slowed in the northern mountain ranges due to the cool air and new snowfall; rapid snowmelt continued in Colorado and the Uintas.
Unsettled weather is expected today in the north as the upper low moves into the Northern Plains. Another cold front passing through the region tomorrow will bring up to 1/2 inch of rain today in northwestern Wyoming ahead of another low aloft. This second upper low will could bring up to 6 inches of snow to northwestern Wyoming again on Thursday.