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US Extended Forecast thru Jan 1

Used The 00z/25 Ecmwf For Days 3, 4, And 5, And The 00z/25 Ecens
Mean For Days 6 And 7.

The 00z/25 Gfs Outpaced The Other Global Guidance With The Progression Of The Northern Stream Waves, With The 06z/25 Gfs Coming In Much Closer To The Timing Of The Majority.

The 00z/25 Ecmwf Correlates Well With The Ensemble Means Until Late In The Period, When It Sharply Amplifies A Southern Stream Wave Near Texas.

The Big News Is That The Flow Over North America Appears To Be Going Into High-Meridional Mode At The End Of The Medium Range, With A Direct Transport Of Arctic Air Into The Eastern United States After The Turn Of The Year.

Before The Arctic Onslaught, One More Juicy Wave Should Spread
Rain Through The Gulf States, Southeast, And Coastal Atlantic
During The First Half Of The Forecast.

By Days 6 And 7, The West Should See Building Heights While Continental Air Floods The East--Shutting Down Ocean-Fueled Precipitation For A While.


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