000
AGXX40 KNHC 220220 AAA
MIMATS

MARINE WEATHER DISCUSSION...AMENDED 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1010 PM EST SUN MAR 21 2010

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

AMENDED TO DROP ALL WARNINGS

GULF OF MEXICO...
A STRONG COLD FRONT IS JUST ABOUT TO EXIT THE E GULF WATERS. 
SHIPS V7HC6 AND PECF REPORTED 34 AND 40 KT WINDS RESPECTIVELY 
BUT A QUICK QC OF THE SHIPS INDICATED THEY WERE RUNNING ABOUT 9 
TO 13 KT TOO HIGH. IN ANY EVENT...MOST RECENT SHIP/BUOY/CMAN 
REPORTS ELSEWHERE OVER THE N GULF INDICATED WINDS HAVE DROPPED 
BELOW GALE FORCE...THOUGH SEAS ARE STILL RUNNING UP TO 14 FT PER 
THE LATEST SEA STATE ANALYSIS. 

HIGH PRESSURE WILL SHIFT E ACROSS THE CENTRAL GULF MON AND TUE 
WITH RETURN FLOW INCREASING AGAIN IN THE W GULF TUE AND WED. A 
NEW COLD FRONT WILL MOVE OFF NW GULF COAST THU MORNING...BUT IT 
WILL NOT BE AS STRONG AS THE PREVIOUS SYSTEM AND GALES ARE NOT 
EXPECTED.

TROPICAL ATLC AND CARIBBEAN SEA...
FRESH TO STRONG TRADES WILL CONTINUE TO DOMINATE THE EAST AND 
CENTRAL CARIBBEAN DURING THE FORECAST PERIOD. AN EARLIER ASCAT 
PASS AND SURFACE DATA ACROSS THE EASTERN PORTION OF THE BASIN 
VERIFIED THESE WINDS SPEEDS WITH THE STRONGEST WINDS S OF 15N 
AND E OF 76W. THE COLD FRONT CURRENTLY IN THE GULF OF MEXICO  
WILL PASS THROUGH THE YUCATAN CHANNEL BY THIS EVENING BRINGING 
20-25 KT N WINDS BEHIND IT. THE FRONT WILL EXTEND FROM CENTRAL 
CUBA TO THE GULF OF HONDURAS MON MORNING AND FROM E CUBA TO FAR 
SW CARIBBEAN TUE MORNING AND DISSIPATE WED. TRADE WINDS IN THE 
TROPICAL N ATLC ZONE WILL DIMINISH BELOW 20 KT WED AS THE COLD 
FRONT CURRENTLY OVER THE GULF OF MEXICO MOVES EASTWARD NORTH OF 
THE AREA.

SW N ATLC W OF 65W... 
A STATIONARY FRONT OVER THE SE PORTION OF THE AREA IS SLOWLY 
MOVING NWD AS SURFACE WINDS VEER TO THE SE AHEAD OF THE NEXT 
COLD FRONT EXPECTED TO MOVE INTO THE NW WATERS LATE TONIGHT.
NE WINDS OF 20 TO 25 KT WERE NOTED THIS MORNING WITHIN 90 NM N 
OF THE FRONT DUE TO THE PRES GRADIENT BETWEEN RIDGING FROM 
BERMUDA THROUGH THE CENTRAL BAHAMAS INTO CENTRAL CUBA AND THE 
COLD FRONT IN THE GULF OF MEXICO. S TO SW WINDS AHEAD OF THE 
NEXT COLD FRONT ARE FORECAST TO INCREASE T0 20 TO 30 KT N OF 
28N TONIGHT THEN SHIFT W BEHIND IT. GALE CONDITIONS ARE NOT 
EXPECTED IN THE SW N ATLC WITH THIS FRONTAL SYSTEM. HIGH PRES 
BUILDS BEHIND THE FRONT. WINDS WILL REMAIN IN THE 20 TO 25 KT 
RANGE N OF 28N EITHER SIDE OF THE COLD FRONT DIMINISHING WED AS 
HIGH PRES IN THE WAKE OF THE FRONT TAKES CONTROL OF THE WEATHER 
CONDITIONS ACROSS THE REGION. 

WARNINGS...
ATLC...
.NONE.
 
CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

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

$$
FORECASTER GR/COBB