US Preliminary Extended Weather thru Dec 17

Upper Level Ridging Near Greenland And South Of Alaska
Teleconnects To Troughing Around 110w Over The Next Week.

The Models/Ensembles Generally Agree On The Synoptic Pattern Though The Gfs/Gefs Are More Amplified Than The Ecmwf/Ecens Mean. Given The Trend Toward Quicker Progression Seen Over The Past Several Model Cycles In The Short Term And Medium Range... Again Opted To Lean Toward The More Progressive Guidance Via The
Ecmwf/Ukmet/Ecens Mean.

In Addition... The Gfs Appeared To Overdevelop Energy Moving Out Of Nw Canada At The End Of The Short Term Unlike The Other Guidance. The Pacific Is Fraught With Differences Given The Fast Jet But Tried To Capitalize On The Larger Cluster Of Agreement... Being The Ecmwf/Ukmet/Ecens.

This Will Drop Systems Through The West In The Southern Stream Before Turning The Corner Toward The Great Lakes In The Following Days In A Pattern Not Unlike The Current One.


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