Big totals with a powerful 9-day Atmospheric River

Tomer’s Take: Data continues to suggest a “strong to extreme” intensity atmospheric river (AR) 12/27-1/4 for most of the West. Grand totals (see below) of 1-5 feet or more.

My forecast video 12/26:

Current Setup

Water vapor satellite shows the organizing atmospheric river reaching all the way into the western Pacific. This is the Pineapple Express.

Water vapor satellite 1:35pm 12/26/2022.

Forecast Pattern

Forecast jet stream valid 12/30. Very impressive west to east jet stream pattern acting like a conveyor belt for the moisture. The jet reaches west beyond Hawaii.

Forecast Timing

Forecast radar/satellite valid 12/26-12/31.

Forecast Totals

Forecast snow totals (inches) valid 12/26-12/28.

Forecast snow totals (inches) valid 12/29-1/4.

My forecast grand totals 12/27-1/4:

Alta, UT: 64″

Jackson Hole, WY: 29″

Aspen/Snowmass, CO: 32″

Crested Butte, CO: 54″

Silverton, CO: 48″

Wolf Creek, CO: 46″

Mammoth Mountain, CA: 91″

Heavenly/Tahoe/Palisades/Kirkwood: 71″

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Key Snow Timeline for Wasatch:

  • 12/27: (PM) 14″
  • 12/28: (AM) 10″
  • 12/29: (PM) 2″
  • 12/30: 12″
  • 12/31: 12″
  • 1/1: 12″
  • 1/2: 1″
  • 1/3: 1″
  • 1/4: 1″

Forecast snow totals (inches) valid 12/26-1/4.

3 thoughts on “Big totals with a powerful 9-day Atmospheric River

  1. Scott McClarrinon

    Good stuff! May the Pineapple Express activate and provide the west with plenty of moisture.

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