Severe Weather Threat Sep 3-7

The Latest Medium Range Models Indicate That A Significant Cut-Off
Closed Low Will Remain Just West Of The Pacific Northwest Coast
Through The Middle Of The Coming Work Week...Before An Upstream
Impulse Contributes To An Eastward Acceleration...Inland Along The
Canadian/U.S. Border Area.

The 31/00z Gfs And Ecmwf Are Fairly Similar With Their Forecasts... But Their Respective Ensembles Still Exhibit Considerable Spread.

f The Current Trends Hold...A Substantive Risk For Severe Storms Could Develop Across Parts Of Northeastern Oregon And Eastern Washington...Into The Mountains Of Northern Idaho And Western Montana Thursday /Day 6/...As A Vigorous Mid/Upper Jet Streak Noses Across The Region. A Gradual Moistening Of The Low/Mid Level Environment Is Expected Across This Region In The Preceding Days...And It Does Not Appear Completely Out Of The Question That Destabilization Could Become Sufficient For A Regional Type Severe Weather Event. However...At This Time...Uncertainties Still Appear Too Large To Delineate A Regional Severe Risk Area.

Some Severe Weather Potential Could Continue Across The Northern
Rockies Into The Northern Plains Friday Into Saturday. But Current
Indications Are That This May Remain Relatively Minor Or Sparse In

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