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AGXX40 KNHC 240708
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
210 AM EST TUE NOV 24 2009

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

UPPER LEVELS...
DEEP LAYER ANTICYCLONIC CIRCULATION IS CENTERED OVER THE EASTERN
GREATER ANTILLES AND COVERS THE ENTIRE CARIBBEAN AND MOST OF THE
ATLANTIC AREA. MODERATE WINDS ARE TO THE NORTH AND NORTHWEST OF
THE RIDGE WITH SOUTHWESTERLIES OVER THE GULF OF MEXICO AND
WESTERLIES NORTH OF 29N IN THE ATLANTIC AREA. THE HIGH WILL
CONTRACT SOME TODAY AND WEDNESDAY AS A STRONG MIDDLE LATITUDE
TROUGH DEVELOPS OVER THE CENTRAL AND EASTERN UNITED STATES. BY
EARLY FRIDAY RIDGE WILL BE SOUTH OF ABOUT 22N AND MODERATE
WESTERLIES WILL BE NORTH OF 22N WITH STRONG WESTERLIES OVER THE
NORTHEAST GULF OF MEXICO AND FLORIDA AND THE ATLANTIC AREA NORTH
OF 27N WEST OF 72W. THE STRONG SHORTWAVE WILL CONTINUE TO MOVE
EAST AND CONTRACT NORTHWARD SOME SATURDAY BUT MODERATE TO STRONG
WESTERLIES WILL CONTINUE NORTH OF ABOUT 20N.

SURFACE...
AHEAD OF THE NEXT COLD FRONT NORTH OF THE TRADES THERE IS A WEAK
PRESSURE PATTERN WITH WEAK SURFACE WINDS MOSTLY LESS THAN 15
KNOTS. NEXT COLD FRONT... ASSOCIATED WITH THE STRONG MIDDLE
LATITUDE TROUGH...WILL MOVE OFF THE TEXAS COAST TODAY AND REACH
FROM NORTH FLORIDA TO EASTERN BAY OF CAMPECHE MIDDAY WEDNESDAY
AND MOVE TO THROUGH 31N73W TO CENTRAL CUBA AND CONTINUE ON TO
THE NORTHWEST CARIBBEAN MIDDAY THURSDAY AND MOVE TO THROUGH
31N67W TO ACROSS EASTERN CUBA TO GULF OF HONDURAS MIDDAY FRIDAY
AND TO 31N60W TO HAITI THEN DIFFUSE OVER THE NORTHWEST CARIBBEAN
MIDDAY SATURDAY. A TROUGH WILL DEVELOP AHEAD OF THE FRONT OVER
THE EASTERN GULF OF MEXICO TONIGHT AND A LOW WILL DEVELOP WITHIN
THE TROUGH THAT WILL MOVE ACROSS NORTH FLORIDA WEDNESDAY AND
BECOME ABSORBED BY THE APPROACHING COLD FRONT WHEN THE LOW MOVES
OVER THE NORTHWEST PART OF THE ATLANTIC AREA WEDNESDAY. WINDS
NEAR THE LOW WILL APPROACH 30 KNOTS. FRONTAL TROUGH WILL
INTENSIFY FRIDAY AS THE STRONGEST PART OF THE SHORTWAVE MOVES
PAST THE AREA WITH INCREASING SURFACE WINDS IN THE ATLANTIC AREA
FRIDAY. WINDS WILL DECREASE SATURDAY AS THE PRESSURE GRADIENT
WEAKENS.

TRADES OF 20 KNOTS OR MORE ARE CONFINED TO SOUTH OF 17N EAST OF
82W TODAY. WINDS WILL BE UP TO 30 KNOTS IN THE SOUTH CENTRAL
CARIBBEAN. THE WINDS WILL THEN WEAKEN TONIGHT THROUGH THURSDAY
AND REMAIN WEAK FRIDAY AND SATURDAY AS THE ABOVE MENTIONED
FRONTAL TROUGH WEAKENS THE RIDGE NORTH OF THE AREA.

OTHERWISE WINDS WILL BE LESS THAN 20 KT.

WARNINGS...

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

$$
FORECASTER LL




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