000
AGXX40 KNHC 210620
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
230 AM EDT WED OCT 21 2009

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

GULF OF MEXICO...
HIGH PRES RIDGE DOMINATES THE GULF OF MEXICO PRODUCING E TO SE 
WINDS OF 20 KT OVER MUCH OF GULF REGION BUT MAINLY OVER THE 
EASTERN HALF OF THE GULF. THE HIGH CENTERED OVER THE SE CONUS 
WILL MOVE E THROUGH FRI AND GRADUALLY WEAKEN. AS A RESULT...THE 
WINDS OVER THE WESTERN GULF BECOME SLY AND WINDS OVER THE E GULF 
DECREASE TO 15 KT THU NIGHT AS THE HIGH CONTINUES TO MOVE E AND 
COLD FRONT APPROACH THE TEXAS COAST. THE FRONT WILL MOVE SE INTO 
THE NW GULF THU NIGHT AND REACH FROM SE LOUISIANA TO THE NEAR 
TAMPICO MEXICO FRI EVENING THEN EXTEND FROM TAMPA BAY TO THE 
YUCATAN PENINSULA BY SAT EVENING. SLY WIND WILL BRIEFLY INCREASE 
TO 20 KT N OF 25N AHEAD OF THE FRONT. NLY WINDS OF 20-25 KT AND 
SEAS 8 TO 10 FT ARE EXPECTED IN THE WAKE OF THE FRONT FRI AND 
SAT THEN DECREASE TO 10-15 KT ON SUN.

CARIBBEAN AND TROPICAL N ATLANTIC W OF 55W...
THE STATIONARY FRONT OVER THE NW CARIBBEAN HAS DISSIPATED WITH 
NE WINDS OF 20 KT REMAINING PARTICULARLY N OF 20N W OF 78W. A 
BROAD AREA OF LOW PRESSURE OVER THE SOUTHWESTERN CARIBBEAN SEA 
IS PRODUCING A LARGE AREA OF CLOUDINESS AND SHOWERS. ANY 
DEVELOPMENT OF THIS SYSTEM IS EXPECTED TO BE SLOW TO OCCUR AS IT 
REMAINS NEARLY STATIONARY DURING THE NEXT COUPLE OF DAYS. WINDS 
AND SEAS WILL BE HIGHER NEAR THE TSTMS EMBEDDED IN THIS AREA. 
THERE IS A LOW CHANCE...LESS THAN 30 PERCENT...OF THIS SYSTEM 
BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. ELY TRADES 
HAVE DECREASE TO BELOW 20 KT OVER THE SOUTH-CENTRAL CARIBBEAN. 
THESE CONDITIONS ARE EXPECTED TO PERSIST THROUGH LATE THU. 
TRADES SHOULD INCREASE AGAIN LATE FRI INTO SAT NEAR THE COAST OF 
COLOMBIA AS THE LOW PRES OVER THE SW CARIBBEAN MOVES NWD.   
 
SW N ATLC S OF 31N AND W OF 65W...
AT 21/0000 UTC...A COLD FRONT ENTERS THE AREA NEAR 26N65W THEN 
CONTINUES SW TO NEAR 24N70W. AT THIS POINT...THE FRONT BECOMES 
STATIONARY AND CONTINUES SW TO E CUBA. THE N PORTION OF THE 
FRONT WILL CONTINUE TO MOVE OUT OF AREA AND THE S PORTION WILL 
DISSIPATE TODAY. NE WINDS OF 20-25 KT AND SEAS TO 10 FT ARE 
STILL NOTED W OF THE FRONT. HIGH PRES WILL BUILD BEHIND THE 
FRONT PRODUCING STRONG NE TO E WINDS N OF AROUND 25N THROUGH THU 
THEN DECREASE ON FRI. ANOTHER COLD FRONT WILL APPROACH THE SE 
U.S. COAST SAT WITH SW WINDS INCREASING TO 20 KT N OF 27N W OF 
73W BY SAT. THE FRONT WILL WEAKEN AND EXTEND FROM 31N77W TO 
CENTRAL FLORIDA SUN.

WARNINGS...

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

$$
FORECASTER GR