000 AGXX40 KNHC 270547 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 AM EDT SUN APR 27 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. UPPER LEVELS... WEAKENING TROUGH OVER THE ATLANTIC AREA EAST OF 72W AND THE CARIBBEAN AND A WEAK RIDGE OVER THE AREA WEST OF 72W. THE PATTERN WILL MOVE EAST WITH WEAK RIDGE OVER THE ATLANTIC AREA EAST OF FLORIDA SUNDAY NIGHT. A STRONG SHORTWAVE WILL BE OVER EAST TEXAS SUNDAY NIGHT AND WILL MOVE ACROSS THE GULF OF MEXICO MONDAY AND TUESDAY. TROUGH WILL BEGIN TO WEAKEN AS IT PASSES THROUGH THE CENTRAL GULF OF MEXICO. THE TROUGH WILL CONTINUE TO WEAKEN OVER THE ATLANTIC AREA. A BROAD RIDGE WILL DEVELOP IN THE WAKE OF THE TROUGH AND WILL COVER THE GULF OF MEXICO BY WEDNESDAY AND BY THURSDAY BROAD RIDGING WILL COVER THE ENTIRE AREA. SURFACE... STRONG COLD FRONT ASSOCIATED WITH THE ABOVE MENTIONED STRONG SHORTWAVE WILL MOVE OFF THE TEXAS COAST SUNDAY AFTERNOON AND REACH FROM NORTH FLORIDA TO BAY OF CAMPECHE MIDDAY MONDAY. GALE FORCE NORTHERLY WINDS WILL BE BEHIND THE FRONT IN THE SOUTHWESTERN GULF OF MEXICO SUNDAY NIGHT AND MONDAY BECOMING LESS THAN GALE FORCE LATE MONDAY. AS WITH THE SHORTWAVE THE FRONT WILL BEGIN TO WEAKEN IN THE CENTRAL GULF AND WILL MOVE EAST AND SOUTHEAST OF THE GULF OF MEXICO BY LATE TUESDAY. THE FRONT WILL HAVE SOME EFFECT ON THE NORTHWEST CARIBBEAN IN THAT LIGHT WINDS WILL BECOME NORTHEAST AND INCREASE TO 15 KNOTS. THE FRONT WILL MOVE OFF THE GEORGIA COAST LATE MONDAY AND BY LATE TUESDAY EXTEND FROM 31N73W TO NEAR 23N80W AND ACROSS THE FAR NORTHWEST CARIBBEAN. A LOW WILL DEVELOP JUST NORTH OF THE AREA TUESDAY NIGHT AND STRENGTHEN THE FRONT NORTH OF 25N AND BY LATE WEDNESDAY THE FRONT WILL EXTEND FROM NEAR 31N65W TO EAST CUBA. RIDGE WILL BUILD JUST NORTH OF THE AREA BEHIND THE FRONT MAINLY OVER THE ATLANTIC AREA WITH RETURN FLOW IN THE WEST GULF OF MEXICO BEGINNING TUESDAY NIGHT AND BY LATE THURSDAY THE SOUTHEASTERLY TO SOUTHERLY RETURN FLOW WILL COVER ALL OF THE GULF OF MEXICO AND EVEN IN THE NORTHWESTERN CARIBBEAN WEST OF 85W. WARNINGS... ATLC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. .FORECASTER LL. TROPICAL PREDICTION CENTER.