000
AGXX40 KNHC 230557
MIMATS

MARINE WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
215 AM EDT SAT APR 23 2011

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

GULF OF MEXICO...
NO MAJOR CHANGE IS EXPECTED ACROSS THE GULF WATERS OVER THE NEXT 
SEVERAL DAYS AS HIGH PRES REMAINS IN CONTROL OF THE WEATHER 
PATTERN ACROSS THE REGION. THE PRES GRADIENT BETWEEN THIS HIGH 
PRES AND LOWER PRES OVER THE PLAINS AND NE MEXICO WILL RESULT IN 
20 TO 25 KT SLY RETURN FLOW OVER THE GULF THROUGH TUE AHEAD OF A 
COLD FRONT MOVING OFF THE TEXAS COAST LATE WED. THE COLD FRONT 
WILL RACE E AND EXTEND FROM THE FLORIDA BIG BEND TO THE BAY OF 
CAMPECHE LATE WED NIGHT. N WINDS OF 20 TO 25 KT AND BUILDING 
SEAS TO 8 FT ARE EXPECTED IN THE WAKE OF THE FRONT.

SOUTHWEST N ATLC...
A NON-TROPICAL LOW PRES SYSTEM LOCATED NEAR 25N65W COMBINED WITH 
A STRONG RIDGE ACROSS THE REMAINDER OF THE AREA IS PRODUCING 
20-30 KT NE WINDS OVER THE EASTERN PORTION OF THE SW N ATLC. A 
TROUGH EXTENDS FROM LOW CENTER TO THE US/UK VIRGIN ISLANDS. 
DISORGANIZED SHOWER ACTIVITY IS ASSOCIATED WITH THIS LOW...AND 
UPPER-LEVEL WINDS ARE FORECAST TO BECOME HIGHLY UNFAVORABLE FOR 
DEVELOPMENT DURING THE NEXT 48 HOURS. THERE IS A LOW CHANCE OF 
THIS SYSTEM DEVELOPING INTO A SUBTROPICAL OR TROPICAL CYCLONE 
DURING THAT TIME. THE LOW IS FORECAST TO MOVE SW REACHING 23N67W 
SAT EVENING THEN WEAKEN INTO A TROUGH ON SUN AS IT MOVES WWD 
ACROSS THE SE BAHAMAS. THE TROUGH IS FORECAST TO REACH THE NW 
BAHAMAS MON EVENING AND MOVE ACROSS SOUTH FLORIDA MON NIGHT INTO 
TUE. ONCE AGAIN...A RIDGE WILL DOMINATE MOST OF THE AREA BY WED. 
SLY RETURN FLOW WILL INCREASE ACROSS THE NW CORNER OF THE ZONE 
LATE WED AS A COLD FRONT APPROACHES SE UNITED STATES COAST LATE 
WED NIGHT.

CARIBBEAN SEA AND TROPICAL ATLC W OF 55W...
STRONG HIGH PRES N OF AREA WILL PRODUCE A BELT OF NE WINDS OF 20 
KT JUST S OF CUBA AND ACROSS THE WINDWARD AND MONA PASSAGES. ELY 
WINDS OF 20 KT ARE ALSO BLOWING IN THE GULF OF HONDURAS. THESE 
CONDITIONS ARE EXPECTED TO DIMINISH BY SUN AS THE PRES GRADIENT 
RELAXES OVER THE NORTHERN CARIBBEAN AND A TROUGH MOVES ACROSS 
THE SE BAHAMAS. RATHER TRANQUIL CONDITIONS PERSIST ACROSS THE 
REMAINDER OF THE BASIN WITH THE EXCEPTION OF NEAR THE COAST OF 
COLOMBIA WHERE NE TO E WINDS OF 20 TO 25 KT ARE EXPECTED.

WARNINGS..

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

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

$$
FORECASTER GR