000
AGXX40 KNHC 231822
MIMATS

MARINE WEATHER DISCUSSION         
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
225 PM EDT THU APR 23 2009

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

GULF OF MEXICO...
WELL STACKED HIGH PRES CENTER SETS UP ALONG 28N MAINTAINING DRY 
AIR MASS AND CLEAR SKIES ALONG WITH LIGHT WIND AND SLIGHT SEAS 
OVER N HALF OF GULF...EXCEPT W OF 93W WHERE S-SE RETURN FLOW 
BRUSHES ALONG COAST OF TEXAS INCREASING WINDS TO 20-25 KT AFTER 
TONIGHT.  HIGH PRES CENTER DRIFT E OF BASIN FRI NIGHT WITH RIDGE 
EXTENDING W ALONG 29N.  LARGE AREA OF STRONG WINDS AROUND 
SOUTHERN PERIPHERY OF RIDGE AFFECTS S HALF OF GULF INCLUDING 
STRAITS OF FLORIDA BUILDING SEAS TO 11 FT SAT.
 
SW N ATLC...
DEEP LAYER LONGWAVE TROUGH SUPPORTS WEAK COLD FRONT EXTENDING 
FROM 31N63W TO 20N72W.  SW JET CORE 90 KT FOLLOWS TROUGH NE 
STALLING FRONT AND WEAKENING IT AS IT MOVES E OF BASIN TONIGHT.
DEEP LAYER TROUGH LIFT NE OUT OF BASIN AS UPPER LEVEL JET CORE 
MOVES E OF TROUGH AXIS.  STRONG SURFACE HIGH PRES 1032 MB BUILDS 
ALONG 31N IN SW N ATLC INCREASING NE TO E WINDS S OF 25N WITH 
SEAS DEVELOPING LONG FETCH AND LARGE SWELLS AIMING DIRECTLY INTO 
BAHAMA BANK.

CARIBBEAN AND TROPICAL N ATLC...
TRADE WINDS GET SQUEEZED BETWEEN BUILDING RIDGE TO THE N AND LOW 
PRES 1010 MB OVER COLOMBIA THROUGH MOST OF FORECAST PERIOD... 
DRIVING TRADES NEAR 30 KT ALONG COAST OF COLOMBIA AND INCREASING 
COVERAGE ACROSS EASTERN CARIBBEAN.  TROPICAL ATLC ALSO UNDER 
FRESH TO STRONG TRADES E OF AREA WITH LONG FETCH BUILDING SWELLS 
TO 9 FT.

ATLC...
.NONE.. 

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

FORECASTER WALLY BARNES. TROPICAL PREDICTION CENTER.