000
AGXX40 KNHC 131657
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
100 PM EDT FRI APR 13 2007

MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA
AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W.

UPPER LEVELS...
LARGE RIDGE OVER THE AREA CENTERED OVER THE CARIBBEAN. STRONG 
SHORTWAVE MOVE OFF TEXAS COAST SAT NIGHT THEN OFF EAST U.S. 
COAST SUNDAY NIGHT WILL THEN FORM A LARGE CUT-OFF LOW NORTH OF 
THE ATLANTIC AREA THROUGH TUESDAY. TROUGH WILL BEGIN TO MOVE 
EAST WEDNESDAY TO EAST OF 70W.  SECOND SHORTWAVE MOVE OFF TEXAS 
COAST TUESDAY AND BE OVER EAST GULF OF MEXICO AND FLORIDA LATE 
WEDNESDAY.

SURFACE...
COLD FRONTS ASSOCIATED WITH BOTH SHORTWAVES. FIRST COLD FRONT 
MOVE OFF TEXAS COAST SATURDAY AND MOVE ACROSS THE GULF AND PASS 
OVER FLORIDA SUNDAY THEN PAST BERMUDA MONDAY AND OVER THE 
SOUTHEAST PART OF THE ATLANTIC AREA TUESDAY THEN BECOME DIFFUSE 
ON WEDNESDAY.  STRONG WINDS BOTH AHEAD OF AND BEHIND THE FRONT 
WITH GALE CONDITIONS IN THE SOUTHERLY FLOW OVER THE ATLANTIC 
SUNDAY. THE WINDS ARE DUE TO STRONG LOW PRESSURE DEVELOPMENT 
OVER THE SOUTHEAST U.S. THE HIGH BEHIND THE FRONT IS WEAK AND AS 
SUCH THE WINDS WILL NOT HAVE MUCH IMPACT IN THE CARIBBEAN OR THE 
ATLANTIC MUCH SOUTH OF 25N.  THE NEXT SHORTWAVE IS FORECAST TO 
DEVELOP A LOW PRESSURE FURTHER SOUTH OVER THE GULF OF MEXICO 
LATE TUESDAY AND WEDNESDAY. BESIDES THE GULF OF MEXICO AND THE 
ATLANTIC THESE WINDS WILL HAVE AN IMPACT ON THE FAR NORTHERN 
PART OF THE CARIBBEAN. A LITTLE EARLY TO TELL THE STRENGTH OF 
THE SYSTEM BUT THE 06Z GFS HAD GALE CONDITIONS IN ATLANTIC AREA 
BUT THE 12Z RUN DID NOT.  
 
WARNINGS...
ATLANTIC...
AMZ080...GALE...1200 UTC SUN APR 15...N OF 28N W OF 76W. 

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER LL