Weather US Short Range Outlook Through Sep 18

Short Range Forecast Discussion
Nws Hydrometeorological Prediction Center Camp Springs Md
241 Am Edt Thu Sep 16 2010

Valid 12z Thu Sep 16 2010 - 12z Sat Sep 18 2010

A Strong Cold Front Barreling Southward From Western Canada Will
Bring The First Mass Of Really Cold Air To The Northern U.S. This
Friday. Temperatures Along The Northern Tier Will Drop By As Much
As 20 Degrees With This Frontal Passage. Steady Rain And Strong
Wind Will Accompany The System. A Very Strong Closed Upper-Level
Low Is Driving This System Southward. This Strong And Well
Organized Upper-Level Energy Will Help Sustain Areas Of
Precipitation Over A Prolonged Period Of Time...Giving Some Areas
Along The Northern Tier A Drenching. Snow Will Be Possible In The
Higher Terrain Of The Canadian Northern Rockies.

The Major Rain Maker For Thursday Is Currently Making Its Way
Through The Midwestern States. Energy At The Upper-Levels Has
Finally Invigorated This Once Stationary Boundary...Stirring Up
Heavy Rain And Thunderstorms As It Makes Its Way Towards The East
Coast. This Now Rapidly Advancing System Should Clear The Midwest
By Late Thursday...With The Bulk Of The Precipitation Moving Into
The Northern Mid-Atlantic And New England States To Finish Out The
Work Week. Precipitation Is Not Expected To Diminish Until The
Northern Portion Of The Front Moves Off The Atlantic Coast Late
Friday. The Southern Portion Will Hang Around The Gulf States But
Will Be Largely Precipitation Free Due To High Pressure Blocking
Returning Gulf Moisture From Reaching The Front.


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