Unofficial Pow: Powder Watch Issued For Sierra & Northern Rockies (Friday-Monday)

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Unofficial Pow: Powder Watch Issued For Sierra & Northern Rockies (Friday-Monday)

Weather

Unofficial Pow: Powder Watch Issued For Sierra & Northern Rockies (Friday-Monday)

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Report From Powderchasers

UPDATE: Confidence is increasing on late weekend Sierra storm! 10-18″ are possible in the Sierra Sunday/Monday. Highest snow totals will be above 10k feet late this week with 9-18 inches additional snow above 7500 feet Sunday and Monday.

Summary:

“Significant moisture is going to slam into the West over the next 5 days”.   The Powder Watch applies to terrain above 9500 feet in the Sierra late this week (Just beyond the summit at most resorts) and drops to 7,500 feet later this weekend into early next week.  Significant base building wet snow is possible from Mammoth through most of northern California late this weekend.  Moisture from hurricane Seymour (700 miles south of the Baja) spreads north from the Sierra into the northern Rockies late this week and again early next when temperatures will be cooler.   The Tetons, northern Wasatch and perhaps southern Montana are also in play especially Monday morning.

Details:  

High snow levels will significantly impact amounts this week! The Pacific Northwest snow levels remain above most mid mountain locations but will drop next week with a good chance of snowfall to the Cascades next week. The Sierra stays warm with the exception of the highest peaks that might grab some surprises by Friday morning (Mountain tops). One exception may be Mammoth where higher elevations bring a better shot of accumulating snowfall on upper mountain.  A more significant system slams into the Sierra Sunday/Monday with lower snow levels (7500).  8-15 additional inches are likely at many resorts with some accumulations at the bases. This might be our official kick off for the season? 

The Wasatch, central Idaho,Tetons and southern MT grab quick moving leftovers late this week peaking late Friday/Saturday AM.  Models show light snowfall above 9,000 feet  with perhaps moderate amounts over the Tetons (3-7).

A stronger and colder system will bring better odds of a “Deeper Dump” Sunday afternoon through Monday to many areas of the northern Rockies.  Currently the odds are good for the Wasatch, Tetons, northern Colorado (Central Idaho and southern Montana wildcards).

Powder Alerts will be hoisted once confidence increases on this forecast.

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Powderchaser Steve

 

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