000
AGXX40 KNHC 201840
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
240 PM EDT WED OCT 20 2010

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

A VERY WEAK PRES PATTERN CONTINUES OVER THE GULF OF MEXICO WITH 
LIGHT WINDS ACROSS THE ENTIRE AREA. LITTLE CHANGE IS EXPECTED  
THROUGH FRI...BUT SLY WINDS WILL INCREASE TO 20-25 KT IN THE NW 
GULF FRI AND SAT NEAR THE COAST OF SRN TEXAS AND NRN MEXICO AS A 
RIDGE OVER THE SE U.S. INTENSIFIES. ELY WINDS WILL INCREASE OVER 
THE REST OF THE GULF THIS WEEKEND...WITH WINDS IN THE STRAITS OF 
FLORIDA APPROACHING 25 KT AND SEAS BUILDING TO 8 FT N OF CUBA.

A TROUGH EXTENDS NE FROM THE NRN BAHAMAS TO NEAR 30N70W. HIGH 
PRES BUILDING ACROSS THE NORTHERN PORTION OF THE ATLC ZONE ALONG 
30N THROUGH THU NIGHT WILL INCREASE THE PRES GRADIENT ASSOCIATED
WITH THIS TROUGH...WITH SW WINDS E OF THE TROUGH INCREASING TO 
25 KT THU AND THU NIGHT. THE PRES GRADIENT WEAKENS FRI AS A MID-
LAT TROUGH SHIFTS FURTHER E. STRONG HIGH PRES BUILDS N OF 30N 
THIS WEEKEND INCREASING ENE TRADES TO AROUND 20 KT N OF 25N.  

WINDS REMAIN GENERALLY 10-15 KT ACROSS THE CARIBBEAN. A 1007 MB 
LOW NEAR 18N83W HAS LOST ALL NEARBY CONVECTION TODAY...AND IS 
EXPECTED TO DRIFT S THROUGH FRI THEN MOVE W TOWARD THE CENTRAL 
AMERICAN COASTS OF HONDURAS AND NICARAGUA SAT AND SUN. VERTICAL 
SHEAR IS FORECAST TO DIMINISH BY FRI...AND THE LOW MAY DEVELOP 
INTO A TROPICAL CYCLONE BEFORE REACHING CENTRAL AMERICA.

WARNINGS...

ATLC...
.NONE.

CARIBBEAN...
.NONE.
  
GULF OF MEXICO...
.NONE.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER MUNDELL