Colder temps and light to moderate snowfall likely for the Cascades and Rockies. Heavier snow is likely for the north Cascades!
Update. 3/25/18- AM report
Finally, colder air has brought temps down significantly in the Sierra (9 inches last night at Squaw, 6 at Kirkwood) where snow showers are possible throughout the day. My attention is focused on the Cascades and Wasatch in the next 24 hours where it’s possible some decent freshening are possible. Snow in the Cascades will pick up Sunday night and continue into Wednesday. Light amounts are likely in the southern zones near Crystal (2-5) through Monday where higher amounts are going to fall near Mount Baker Ski area. Steady light snow, moderate at times will bring totals in the Cascades to near a foot by Wednesday morning at many areas. Mount Baker may see 9-16 inches throughout this period. The Good: Steady snow through Wednesday adding up to double digits. The Bad: Good quality Monday with colder temps slowly warms snow levels to the bases (Rain showers by Tuesday at at mountain pass levels) keeping the heaviest snow to mid or upper mountains). The northern Panhandle will see leftovers early this week keeping Schweitzer in the flow for some decent amounts over the next 2-3 days (6-11).
The Wasatch as mentioned yesterday will see some moderate snow especially in the Cottonwoods Sunday/Monday morning. Weak leftovers from the Sierra with cold air should crank out 4-8 inches for Alta, Solitude, Brighton, Snowbird with lower amounts further north by late Sunday night. Snow intensity is peaking 2PM Sunday to midnight (Short window). Snow showers may continue into Monday (Little to no additional accumulations). Plan to ride PM Sunday or AM Monday.
The Tetons also grab light to moderate snow on Sunday (Good quality 2-5). More snow is possible for the Tetons mid week. Plan to ride on Sunday.
In Colorado moisture streaming over the north moves into the Front Range on Monday/Tuesday. Light or moderate snow is possible to areas closest to the Front Range for a freshening for Tuesday morning. Most of the snow may fall closest to metro areas versus the ski areas, however Eldora, Loveland, A Basin, and Winter Park are all on my radar for some light to moderate snow.
Mid week delivers a decent fetch of moderate snow for Montana (Bridger Bowl, Big Sky) with cold air and high quality densities. That will move over the Tetons by Wednesday bringing another good chance of moderate snow to many areas in the northern Rockies. There may not be a single deep overnight dump, however depending on timing you may score 5-10 inches at some point during the cycle. Weakening leftovers will slide over the northern areas of Colorado at some point Wednesday or Thursday.