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Extended Forecast Discussion
 
(Caution: Version displayed is not the latest version. - Issued 0436Z Oct 17, 2014)
 
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Abbreviations and acronyms used in this product
 
Geographic Boundaries -  Map 1: Color  Black/White       Map 2: Color  Black/White


EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1236 AM EDT FRI OCT 17 2014

VALID 12Z MON OCT 20 2014 - 12Z FRI OCT 24 2014


THE 12Z/16 ECENS MEAN WAS THE MOST PRONOUNCED ENSEMBLE MEAN FROM
THAT DATA CYCLE FOR THE UPCOMING REAMPLIFICATION OF THE PATTERN.
AS WITH THE EVENT OF THE PAST COUPLE DAYS, ONLY THE ECENS MEAN
RESOLVED THE DEEP, CLOSED NATURE OF THE UPPER TROUGH OVER THE
EASTERN UNITED STATES. THE SYSTEM AT THE MEDIUM RANGE IS PROGGED
TO CLOSE OFF FARTHER EAST THAN THE CURRENT VORTEX, WITH THE
POTENTIAL FOR A SIGNIFICANT COASTAL LOW TO DEVELOP ONCE THE
CLIPPER SYSTEM TRANSFERS ENERGY FROM THE GREAT LAKES TO THE
MID-ATLANTIC COAST. IN THE WEST, A PRONOUNCED SPLIT IS INDICATED
IN THE FLOW, WITH THE BULK OF THE ENERGY SHEARING THROUGH
WASHINGTON AND OREGON, AND A SMALLER RIBBON OF JET PEELING OFF
THROUGH THE SOUTHWEST.

THE MAIN AREAS OF PRECIPITATION THIS PERIOD WILL BE OVER THE
PACIFIC NORTHWEST, THE SOUTHERN ROCKIES AND ADJACENT HIGH PLAINS,
AND OVER THE NORTHEAST. SNOW IS LIKELY IN THE HIGHEST ELEVATIONS
OF THE WASHINGTON CASCADES, WITH SNOW POSSIBLE IN THE HIGHER
ELEVATIONS OF THE CENTRAL AND NORTHERN APPALACHIANS AS WELL AS THE
ADIRONDACKS.


CISCO