Tomer’s Take: Three different storm systems are lined-up for the West through 12/6 with major grand totals.
- Excellent forcing with this storm cycle including orographics, much colder air pushing efficient ratios, weak atmospheric river (AR) setup for California, and southern jet branch involvement.
- Grand totals by 12/6 will be measured in feet at numerous ski areas.
Jackson Hole is already reporting a foot of new snow in the last 24 hours. This is only storm #1.
Current Setup
Infrared satellite shows a crowded Pacific with low pressure systems lined-up and southern jet branch involvement.
Active Pattern
Forecast jet stream valid 11pm 11/28 shows the first of three different storm systems with major jet support. This first storm largely misses CA’s Sierra. High wind and much colder air follows this storm system.
Forecast jet stream valid 12/6 shows an active storm track continuing. The overall track is further north versus yesterday’s data. This favors the northern tier of the Rockies for heaviest snowfall including PNW, BC, ID, MT, WY, UT, CO.
Forecast Timing
Forecast radar and satellite valid 11/28-12/3.
Forecast Totals
Forecast snow totals (inches) valid 11/28-11/30.
Forecast totals (inches) valid 12/1-12/6.
Forecast totals (inches) valid 11/28-12/6.
My forecast video 11/28:
Just watched you on this morning’s forecast on youtube and while you talked us through the flow and activity over the next few days, the screen remained frozen on the jet stream. Not the first time this happened. I enjoy and rely on your info…appreciate it.
Thanks! I see that now too…odd! I’ll have to double check this next time. Chris
I can’t see Denver–don’t know what the forecast is.
Hi Julie – Denver is not in this forecasts – These are mountain forecasts. Chris
Chris, do you have any thoughts on how the Hunga Tonga-Hunga Ha’apai volcano eruption last January may be affecting our weather this winter? Some have suggested it could lead to a colder, snowier winter?
Hi Michael – I haven’t really thought about it yet. Maybe I’ll put a post together. Chris