EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
951 AM EDT MON MAY 20 2013

VALID 12Z THU MAY 23 2013 - 12Z MON MAY 27 2013


RELIED ON THE MOST RECENT ECENS MEAN FOR THE MEDIUM-RANGE FRONTS
AND PRESSURES ACROSS THE NATION. THE LAST FOUR ECENS MEANS HAVE
BEEN QUITE STABLE, WITH THE GEFS MEANS MEANDERING TOWARD THE
EUROPEAN CENTRE GUIDANCE. DID NOT INCLUDE ANY DETERMINISTIC
SOLUTIONS IN THE MANUAL FORECAST, WITH ANY GIVEN MODEL OUT OF SYNC
WITH THE ENSEMBLE MEANS AT ONE POINT OR ANOTHER DURING THE PERIOD.

EXPECT MEAN TROUGHS OVER THE NORTHWEST AND ALONG THE EASTERN
SEABOARD, WITH A SUBTROPICAL RIDGE OVER THE SOUTH CENTRAL STATES.
AFTER THE COLD FRONTAL PASSAGE EARLY IN THE PERIOD OVER THE EAST,
MOST OF THE PRECIPITATION IS EXPECTED NORTH OF THE POLAR FRONT
FROM THE NORTHERN ROCKIES ACROSS THE NORTHERN GREAT PLAINS AND
INTO THE GREAT LAKES AND MIDWEST. COOL CONDITIONS ARE ANTICIPATED
WITH THE SURFACE HIGH BUILDING INTO THE NORTHEAST BY DAY 5, WITH
HOT WEATHER OVER THE SOUTHERN PLAINS.


CISCO