National Weather Service United States Department of Commerce


A significant winter storm impacted southeast Wyoming on April 16, 2015. A Pacific cold front moved into Wyoming during the night of April 15th. The days leading up to the event were warm and dry. Colder temperatures produced snow in the mountains and rain changing over to snow at lower elevations. Final snow accumulations for elevations below 7000 ft were around 3 - 6 inches, and over 15 inches in the mountains. Elevations below 7000 ft received little to no snow accumulation. 

Radar Loop from 4:15 PM to 9:00 PM, showing snow developing and moving northwest into Wyoming and Nebraska.

Snow Falling at the Weather Service Office in Cheyenne


Video Massive Pile Up on I 80

Credit Marci Hugentobler

April 16, Weather Story Graphic

Snow Reports:



The markers on the map indicate snow amounts at various locations. Click on the marker for the exact snow totals and locations
  • Fire 0 - 2.9 inches
  • Airports 3 - 5.9 inches
  • DOT 6 - 9.9 inches
  • DOT  Greater then 10 inches


Photos & Video:


Snow and Pile-up on Interstate 80

Arial View of I80 Pileup Harriman Road Exit I 80 Pile-up

Arial View of the I 80 Pile-up

Credit: Wyoming Highway Patrol

Harriman Road Exit on I 80

Credit: Wyoming Highway Patrol

View of the Trucks Stuck on I 80

Credit: Wyoming Highway Patrol