000
AGXX40 KNHC 201709
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
110 PM EDT SUN APR 20 2008

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

UPPER LEVELS...
BROAD TROUGH OVER THE ATLANTIC AREA EAST OF 80W. TROUGH EXTENDS 
OVER THE CARIBBEAN TO 83W. BROAD RIDGE IS OVER THE AREA WEST OF 
THE TROUGH. THIS OVERALL PATTERN WILL PERSIST THROUGH FRIDAY. A 
PORTION OF THE TROUGH WILL MOVE EAST AND BE EAST OF THE AREA 
MONDAY BUT A NEW STRONG SHORTWAVE WILL MOVE SOUTHEAST FROM THE 
MID ATLANTIC STATES THROUGH WEDNESDAY STRENGTHENING THE OVERALL 
TROUGH. THE TROUGH WILL BEGIN TO WEAKEN THURSDAY AND MOVE EAST. 
FRIDAY THE TROUGH WILL BE EAST OF 70W. THE RIDGE WEST OF THE 
TROUGH WILL CHANGE LITTLE THROUGH THURSDAY THEN WEAKEN SOME 
FRIDAY.

SURFACE...
A RIDGE OVER THE SOUTHEAST U.S. WILL PRODUCE OCCASIONAL 20 KNOT 
SOUTHEAST RETURN FLOW OVER THE WESTERN GULF OF MEXICO. BROAD LOW 
WILL BE OVER THE CENTRAL PART OF THE ATLANTIC AREA ASSOCIATED 
WITH THE UPPER TROUGH. OTHER THAN THE GULF OF MEXICO RETURN FLOW 
AND EASTERLY TRADES IN THE SOUTHERN CARIBBEAN A WEAK PRESSURE 
PATTERN WILL BE OVER THE AREA WITH WINDS MOSTLY LESS THAN 15 KT.

NORTHEAST SWELL OF NEAR 8 FT WILL SPREAD SOUTH OVER THE 
NORTHEAST PART OF THE ATLANTIC AREA MONDAY NIGHT THROUGH 
WEDNESDAY.

WARNINGS...

ATLC...
NONE. 

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

.FORECASTER LL. TROPICAL PREDICTION CENTER.