The first atmospheric river (AR) of the season is underway in California and snow levels are (finally) dropping to about 6,000ft by tonight into Monday morning. The Tahoe ski areas get it first then Mammoth by tonight. Overall precipitation totals will push 500% of normal from a single event.
This is the largest impulse associated with this atmospheric river. It will then push the moisture into the interior Rockies of Utah, Idaho, Wyoming, and Colorado between Monday night and Tuesday. Accumulation appears significant in Utah and Wyoming. Less in Colorado. Click to enlarge my snow forecast:
A few highlights:
| Forecast Totals | 10/24-25 | 10/25-26 |
| Kirkwood | 36″ | |
| Mammoth | 24″ | |
| Alta | 22″ | |
| Park City | 16″ | |
| Steamboat | 1″ | 9″ |
| Loveland | 1″ | 5″ |
What’s behind this final impulse? Not much. Here’s the latest Integrated Vapor Transport forecast.
Overall, very impressive AR with implications in UT, WY, ID, and CO. The flow stays a little dirty behind this AR from the NW but then turning drier Thursday-Saturday.
So what do you see in store for A little further north about 16 or 1700 km brings you into Banff Alberta We seem to be kind of slow for snow build up in the mountains but on the other hand they say we’re going to get lots this winter
Hi Jim, active storm track right now with 2-3 different storm systems lined-up, but most snow might stay in BC with only moderate amounts hitting Alberta especially late-week. With current cold phase in the south Pacific it should be at least a normal winter.
Thank you for the information! What do you see for northern mountains of Colorado like the Never Summers, RMNP etc?
Thanks, Judi….4-10 inches at the ski areas and across the high peaks of the Northern Mountains Tuesday, Tuesday night, with lingering snow showers on Wednesday. Gusty winds Tuesday. Chris