US Short Range Weather to Nov 21

Mess In The Pacific Northwest With Rain And Mountain Snow***

Scattered Showers For The Central Plains And Midwest***

Showers For The Coastal Carolinas***

The Greatest Amounts Of Rain And Snow Through Tuesday Can Be
Expected For The West Coast States And Into The Northern Rockies
As A Series Of Strong Frontal Systems Affect The Weather.

There Will Be Many Favorable Atmospheric Parameters For A Heavy
Precipitation Event, Including A Strong Jet Stream Aloft, Orographic Forcing, And A Moist Boundary Layer. Rainfall Amounts On Westward Facing Slopes From Northern California To Washington State May Receive On The Order Of 2 To 5 Inches Of Rain During This Forecast Period, And Very Heavy Snow Is Likely For The Higher Elevations. Some Of This Atmospheric Energy Is Expected To Traverse The Northern Rockies, Where Light To Moderate Rain And Mountain Snow Are Expected.

The First Shortwave And Surface Trough To Affect The Pacific
Northwest During This Forecast Period Is Expected To Eject Out
Into The Central Plains And Upper Midwest On Monday. This Should
Result In Developing Return Flow From The Gulf Of Mexico Along
With Moisture Transport From The Southern Plains To The Upper
Midwest, Creating An Environment Favorable For Scattered Showers
From Texas To The Great Lakes.

A Wave Of Low Pressure Along An Old Frontal Boundary Over The
Offshore Waters Of The Southeast Will Keep Clouds And Patchy Areas Of Rain Around Through Monday Night Over The Coastal Carolinas. Improving Weather Conditions Are Forecast Starting Tuesday.

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