000
AGXX40 KNHC 211708
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
108 PM EDT MON APR 21 2008

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

UPPER LEVELS...
BROAD TROUGH EAST OF 82W AND RIDGE WEST OF 82W. STRONG 
SHORTWAVE IS MOVING SOUTHEAST FROM THE MIDDLE ATLANTIC STATES 
INTO THE TROUGH. BOTH THE TROUGH AND THE RIDGE WILL AMPLIFY AS 
THIS HAPPENS THROUGH WEDNESDAY. THE TROUGH WILL WEAKEN SLIGHTLY 
THURSDAY. ANOTHER STRONG SHORT WAVE WILL MOVE SOUTH FROM THE 
CENTRAL ATLANTIC INTO THE TROUGH FRIDAY AND SATURDAY BUT FURTHER 
EAST. BY LATE SATURDAY STRONG TROUGH WILL BE EAST OF 70W WITH A 
BROAD RIDGE WEST OF 70W.

SURFACE...
RETURN SE FLOW IN THE GULF OF MEXICO WEST OF 90W WILL 
OCCASIONALLY REACH 20 KT THROUGH THE PERIOD. 

LOW WILL DEVELOP IN THE CENTRAL ATLANTIC WATERS TUESDAY INTO 
WEDNESDAY. THE LOW WILL SLOWLY MOVE EAST AND PASS EAST OF 65W  
THURSDAY WITH A TROUGH TRAILING SOUTHWEST OVER THE SOUTHEAST 
PART OF THE ATLANTIC AREA. THURSDAY AND FRIDAY HIGH PRESSURE 
WILL DEVELOP OVER THE SOUTHEASTERN U.S. AND WILL RESULT IN 
NORTHEAST WINDS OF UP TO 20 KT BETWEEN THE LOW AND THE TROUGH 
AND THE RIDGE. THIS WILL CONTINUE THROUGH SATURDAY.

WARNINGS...

ATLC...
NONE. 

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

.FORECASTER LL. TROPICAL PREDICTION CENTER.