000
AGXX40 KNHC 201733
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
145 PM EDT SUN MAR 20 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...
A RIDGE WILL EXTEND FROM NW FLORIDA TO NE TEXAS THROUGH TUE... 
THEN WEAK HIGH PRES WILL RE-DEVELOP AND DRIFT S OVER THE EASTERN 
WATERS WITH A RIDGE EXTENDING NW TO THE NE TEXAS COAST. THE HIGH 
WILL DISSIPATE LATE IN THEN WEEK AS THE RIDGE BECOMES ORIENTATED 
FROM LA TO NW CUBA. EASTERLY WINDS WILL INCREASE TO 20 KT S OF 
THE RIDGE OVER THE FL STRAITS THIS AFTERNOON...WITH THESE 
CONDITIONS SPREADING W TO THE S CENTRAL GULF TONIGHT...AND PULSE 
AT SE 15 TO 20 KT OVER THE W WATERS. THE GRADIENT WILL RELAX 
AFTER WED.

SW N ATLC W OF 55W...
A DRY COLD FRONT IS RACING S OVER THE N PORTION OF THE AREA WITH 
HIGH PRES BUILDING IN THE WAKE OF THE FRONT WITH NE WINDS AT 
20-25 KT EXPECTED TO BRIDGE THE FRONTAL BOUNDARY. SEAS WILL BUILD
TO 12 FT...EXCEPT 13 TO 16 FT OVER WATERS SE OF BERMUDA MON. THE 
GRADIENT WILL WEAKEN OVER THE NW PORTION OF THE AREA LATE MON AS 
A W TO E RIDGE BUILDS ALONG 28N BY TUE...BECOMING ORIENTATED E 
TO W ALONG 25N BY THU. A SECOND COLD FRONT WILL PASS THROUGH THE 
NE WATERS TUE NIGHT AND WED...AND A THIRD FRONT FOLLOWS ON FRI.
 
CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
TIGHT PRES GRADIENT BETWEEN HIGH PRES TO THE N OF THE AREA AND 
LOW PRES OVER COLOMBIA IS PRODUCING MODERATE TO STRONG NE TRADES 
ACROSS MUCH OF THE CARIBBEAN...WITH THE STRONGEST WINDS ALONG 
COAST OF COLOMBIA. THE GRADIENT WILL RELAX TUE NIGHT THROUGH 
THU. LIGHT NORTHERLY WINDS IN THE TROPICAL ATLC WATERS WILL 
INCREASE TONIGHT AS A COLD FRONT MOVES RAPIDLY INTO THE NW 
PORTION OF THE AREA...THEN DISSIPATES AS STRONG HIGH PRES BUILDS 
IN ITS WAKE RESULTING IN NE 20 KT WINDS OVER THE N PORTION OF 
THE AREA. THE HIGH WEAKENS AND THE PRES GRADIENT RELAXES THU 
WITH DECREASING WINDS. SEAS TO 10 FT WILL MOVE INTO THE NE ATLC 
PASSAGES TUE AND WED WITH N SWELLS PASSING S THROUGH THE WATERS 
E OF THE CARIBBEAN REACHING THE COAST OF S AMERICA EARLY THU. A 
RIDGE WILL EXTEND E TO W ALONG 22N FRI WITH WINDS BECOMING 
EASTERLY 10 TO 15 KT OVER AREA E OF 65W. 

WARNINGS..

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

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

$$
FORECASTER NELSON