000
AGXX40 KNHC 200622
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
222 AM WED SEP 20 2006

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

UPPER LEVELS...
MIDDLE AND UPPER TROUGH OVER EAST GULF OF MEXICO...FLORIDA AND 
THE WESTERN HALF OF THE ATLANTIC AREA.  THE TROUGH WILL MOVE 
EAST AND WEAKEN AS HIGH BUILDS OVER THE GULF OF MEXICO. BY 
THURSDAY THE TROUGH WILL HAVE MOVED EAST AND BEEN ABSORBED BY 
THE TROUGH ASSOCIATED WITH TROPICAL CYCLONE HELENE.  RIDGE WILL 
BUILD OVER THE WESTERN PART OF THE ATLANTIC AREA THURSDAY 
THROUGH SUNDAY. BY SUNDAY RIDGE WILL BE OVER THE ENTIRE AREA.

SURFACE...
COLD FRONT ASSOCIATED WITH THE ABOVE MENTIONED TROUGH WILL MOVE 
OFF THE SOUTHEAST U.S. COAST TODAY WITH SOUTHWESTERLY WINDS TO 
20 KNOTS AHEAD OF THE FRONT.  THE FRONT WILL MOVE TO NEAR 
BERMUDA TO NORTHERN BAHAMAS LINE BY EARLY THURSDAY AND WEAKEN 
BECOMING ABSORBED BY THE CIRCULATION ASSOCIATED WITH HELENE 
THURSDAY NIGHT.  RIDGE BUILD NORTH OF THE AREA WEST OF THE 
FRONT.  ASSOCIATED CIRCULATION WILL CAUSE SOUTHERLY WINDS OF 
NEAR 20 KT OVER THE WEST GULF OF MEXICO BEGINNING THURSDAY.  THE 
SOUTHERLY WINDS WILL CONTINUE THROUGH SATURDAY THEN WEAKEN SOME 
SUNDAY AS A COLD FRONT MOVES OFF THE TEXAS COAST AND MOVES TO A 
LINE FROM NEAR 30N90W TO SOUTH TEXAS LATE SUNDAY.  20 KNOT 
NORTHERLY WINDS ARE FORECAST BEHIND THE FRONT. TRADES ARE WEAKER 
THAN NORMAL WITH TRADES APPROACHING 20 KT ONLY NEAR THE SOUTH 
AMERICAN COAST IN THE CENTRAL CARIBBEAN.

WINDS FROM HELENE WILL IMPACT THE NORTHERN PART OF THE TROPICAL 
ATLANTIC BUT WILL BE LESS THAN TROPICAL STORM FORCE.  SEAS WILL 
IMPACT BOTH THE TROPICAL ATLANTIC AND THE SW NORTH ATLANTIC 
AREA.

WARNINGS...

ATLANTIC...
NONE.

CARIBBEAN...
NONE. 

GULF OF MEXICO...
NONE.

FORECASTER LL