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Extended Forecast Discussion
 
(Caution: Version displayed is not the latest version. - Issued 0450Z Oct 18, 2014)
 
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Geographic Boundaries -  Map 1: Color  Black/White       Map 2: Color  Black/White


EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1250 AM EDT SAT OCT 18 2014

VALID 12Z TUE OCT 21 2014 - 12Z SAT OCT 25 2014


CONTINUE TO RELY ON THE EUROPEAN CENTRE ENSEMBLE MEAN AS A GUIDE
FOR THE FLOW ACROSS CENTRAL NORTH AMERICA AT THE MEDIUM RANGE. AS
WITH THE MOST RECENT MERIDIONAL EPISODE THAT ULTIMATELY LEAD TO A
LARGE, MID-LEVEL VORTEX OVER THE UNITED STATES MIDWEST, THE ECENS
MEAN ALONE HAS RESOLVED THE BREAKING OF THE WESTERLIES INTO
SPRAWLING EDDIES. THE UPCOMING AMPLIFICATION APPEARS TO BE LEADING
TO A DEEP VORTEX CENTERED JUST OFF THE MID-ATLANTIC COAST, WITH
SIGNIFICANT RAINS WRAPPING INTO THE NORTHEAST FOR MUCH OF THE
PERIOD.

THE OTHER PARTS OF THE NATION IN LINE FOR HEAVY RAINFALL ARE THE
PACIFIC NORTHWEST FROM THE CASCADES TO THE COAST, AND THE FLORIDA
KEYS. THE PACIFIC NORTHWEST WILL RECEIVE THE LION'S SHARE OF THE
SPLITTING FLOW ALONG THE WEST COAST, WITH EXTREME SOUTHERN FLORIDA
EXPERIENCING TROPICAL MOISTURE OVERRUNNING THE POLAR FRONT WEDGED
TO THE SOUTH BY THE BIG MID-ATLANTIC VORTEX.


CISCO