Major Snowstorm( Saturday) Mid-Atlantic???
Posted by Doorman on 12/15/2009, 6:59 pm
Scroll Down For Map

this should grab
our man Freds
 Attention!!!

EXTENDED FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
224 PM EST TUE DEC 15 2009

VALID 12Z FRI DEC 18 2009 - 12Z TUE DEC 22 2009

A FRONTAL WAVE SHOULD MOVE FROM THE GULF OF MEXICO ACROSS FLORIDA
INTO THE WESTERN SUBTROPICAL ATLANTIC...BRINGING HEAVY RAINS TO
THE EASTERN GULF COAST AND SOUTHEAST. ONCE IT NEARS THE
BAHAMAS...THE 00Z MULTI-MODEL ENSEMBLE MEMBERS SPLIT INTO TWO
CAMPS...WITH A SMALLER SOUTHERN CAMP COMPRISED OF ONE-THIRD OF THE
MEMBERS MOVING THE SYSTEM SOUTH OF BERMUDA WITH THE LOW WEAKENING
MARKEDLY AS IT APPROACHES THE AZORES EARLY NEXT WEEK.  THE WESTERN
CAMP MOVES THE RESULTANT CYCLONE NORTHWARD OFFSHORE THE EAST
COAST.  DETAIL DIFFERENCES ACROSS THE GREAT
LAKES/NORTHEAST/ATLANTIC CANADA ON THE EXPECTED LOCATION OF THE
UPPER LEVEL CYCLONE CENTER KEEP THE FORECAST SHROUDED IN
UNCERTAINTY.  IF A MORE WESTERN UPPER CENTER FORMS IN THE GREAT
LAKES DUE TO BUILDING POSITIVE ANOMALIES IN CANADA...WHICH IS
QUITE POSSIBLE IF NOT LIKELY...THAN THE LOW MOVES DIRECTLY UP THE
EAST COAST BRINGING HEAVY SNOWS TO THE MID-ATLANTIC AND NEW
ENGLAND STATES AND POSSIBLY BRINGS A MILD/EASTERLY MARITIME POLAR
AIR MASS INTO MAINE...WHICH WOULD MODERATE TEMPERATURES NEXT
MONDAY/TUESDAY.  HOWEVER...IF THE ENSEMBLE MEAN SOLUTIONS
VERIFY...THE CYCLONE WOULD BE WHISKED WELL OFFSHORE THE
MID-ATLANTIC AND NEW ENGLAND COASTS AND SOUTHEAST OF THE 40N 70W
BENCHMARK WHICH WOULD LEAD TO MUCH LOWER SNOW TOTALS FOR THE
MID-ATLANTIC AND NEW ENGLAND STATES.  THIS IDEA WOULD ALSO KEEP
NEW ENGLAND COLD UNDER THE CORE OF THE UPPER LOW.  A COMPROMISE OF
THE 00Z CANADIAN/00Z ECMWF SPLITS THE UNCERTAINTY HERE UNTIL THE
MODELS AGREE ON THE EXPECTED UPPER PATTERN ACROSS THE GREAT
LAKES/NORTHEAST/ATLANTIC CANADA.



[Embedded content was removed from this page in a 2021 forum update since it no longer works.]
156
In this thread:
Major Snowstorm( Saturday) Mid-Atlantic??? - Doorman, 12/15/2009, 6:59 pm
< Return to the front page of the: message board | monthly archive this page is in
Post A Reply
This thread has been archived and can no longer receive replies.