000 AGXX40 KNHC 191915 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 230 PM EST THU NOV 19 2009 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W GULF OF MEXICO... A FRONTAL SYSTEM EXTENDING FROM NEAR TAMPA BAY FLORIDA TO THE YUCATAN PENINSULA WILL BECOME DIFFUSE LATE THIS AFTERNOON. HIGH PRES IS BUILDING IN BEHIND THE FRONT PRODUCING NE TO E WINDS 10 TO 15 KT OVER THE EASTERN HALF OF THE GULF REGION. WINDS ARE BEGINNING TO VEER TO THE SE ACROSS THE W GULF IN RESPONSE TO A DEVELOPING LOW PRES OVER TEXAS AND NE MEXICO. SLY WINDS AHEAD OF THE LOW PRES AND THE ASSOCIATED COLD FRONT ARE EXPECTED TO INCREASE TO 20 KT TONIGHT...AND TO 25 KT ON FRI. THE LOW PRES WILL MOVE OFF THE TEXAS COAST FRI AND MOVE EAST NORTHEAST OVER THE NORTH GULF STATES THROUGH EARLY SUN THEN NE OVER THE SE CONUS. THE ATTENDANT COLD FRONT WILL EXTEND FROM THE LOW NEAR 28N92W TO 21N97W SAT MORNING AND FROM THE FLORIDA PANHANDLE TO EASTERN BAY OF CAMPECHE BY SUN MORNING. THE GFS COMPUTER MODEL BRIEFLY SUGGEST GALE FORCE WINDS ASSOCIATED WITH THIS LOW FRI AFTERNOON BEFORE MOVING INLAND OVER SE LOUISIANA SAT AFTERNOON. FOR THIS FORECAST PACKAGE WILL KEEP WINDS IN THE 20 TO 30 KT RANGE WITH HIGHER GUSTS ON THE E SIDE OF THE LOW PRES AND OVER THE NW PORTION OF THE GULF REGION. SW N ATLC S OF 31N W OF 55W... TRADE WINDS ARE EXPECTED TO INCREASE TO 2O TO 25 KT NEAR THE COAST OF COLOMBIA TONIGHT...AND AGAIN BY MON AS HIGH N OF AREA STRENGTHENS. IN THE MEANTIME...HIGH PRES OVER THE SE CONUS WILL BUILD SE INTO THE NW CARIBBEAN THROUGH FRI. THE RIDGE WILL WEAKEN SAT THROUGH MON AS THE HIGH MOVES NORTH. BROAD TROUGHING CONTINUES OVER THE NE CARIBBEAN BETWEEN THE VIRGIN ISLANDS AND THE NORTHERN LEEWARD ISLANDS WITH A DECENT WIND SHIFT. A QSCAT PASS FROM AROUND 1020 UTC SHOWED NE WINDS TO 20 KT WITHIN ABOUT 100 NM OF THE COAST OF COLOMBIA. SW N ATLC S OF 31N W OF 55W... BROAD TROUGHING WILL CONTINUE OVER THE FORECAST REGION BETWEEN 70W AND 72W THROUGH FRI WHILE A COLD FRONT IS CURRENTLY CLIPPING THE FAR NW PORTION OF AREA. HIGH PRES LOCATED WELL N OF AREA IS PRODUCING NE WINDS OF 20 TO 25 KT N OF 27N E OF 75W WITH BUILDING SEAS TO 9 TO 13 FT DUE TO NE SWELLS. AN EARLIER JASON PASS CONFIRMED THESE SEA HEIGHTS. THE NEXT COLD FRONT... ASSOCIATED WITH THE ABOVE MENTIONED DEVELOPING LOW OVER THE GULF OF MEXICO...IS EXPECTED TO ENTER THE AREA ON SUN AND WILL WEAKEN AS IT REACHES FROM NEAR 31N77W TO THE NW BAHAMAS LATE MON. THE FORECAST CALLS FOR W TO NW WINDS OF 10 TO 15 KT BEHIND THE FRONT. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. $$ FORECASTER GR