000
AGXX40 KNHC 260517
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
130 AM EDT THU APR 26 2007

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

A VIGOROUS CLOSED MID LEVEL LOW WAS OVER THE MID MS VALLEY 
TONIGHT MOVING NE. A WEAKER MID LOW WAS OVER THE ATLC NEAR 
28N66W DRIFTING E WITH SOME MID LEVEL CLOUDS WITH IT. FLAT MID 
LEVEL RIDGES WERE LOCATED OVER THE CARIB EXTENDING N OVER THE 
BAHAMAS AND ANOTHER RIDGE OVER THE ERN ATLC E OF 50W. ON THE 
SURFACE TONIGHT A 1025 MB HIGH WAS LOCATED NEAR 30N65W. A 
STATIONARY FRONT EXTENDED FROM 31N42W TO PUERTO RICO. A WEAK 
FRONT WAS OVER SE TX AND NEARLY STATIONARY.

LATER DAY 1 WLY MID LEVEL FLOW INCREASES OVER THE NRN GULF AS 
THE STRONG MID LEVEL LOW MOVES TOWARD THE OH VALLEY. THE WEAK 
MID LEVEL LOW OVER THE ATLC DRIFTS SE TO NEAR 26N64W. ON THE 
SURFACE LATER DAY 1 THE ATLC RIDGE LIES ALONG 30N OVER THE 
REGION E OF FL. THE RIDGE WILL MAINTAIN MODERATE ELY WINDS S OF 
20N E OF 80W. THE WEAK TX FRONT WILL MOVE TO THE CENTRAL GULF 
WITH MOSTLY LIGHT WINDS.

FOR DAY 2 MID LEVEL FLOW BEGINS TO RELAX OVER THE N GULF AS THE 
MID LEVEL LOW LIFTS NE. OVERALL FLAT MID LEVEL RIDGE OF HIGH 
PRES COVERS THE ENTIRE AREA. THE EMBEDDED MID LEVEL LOW OVER THE 
WRN ATLC WEAKENS FURTHER DAY 2. ON THE SURFACE DAY 2 LITTLE 
CHANGE TO THE ATLC RIDGE WITH IT'S CENTER MOVING SLOWLY E TO 
NEAR 30N57W. THE GULF FRONT DRIFTS E TO THE ERN GULF. A 1018 MB 
HIGH FOLLOWS OVER LA WITH MOSTLY LIGHT WINDS. 

OUTLOOK PERIOD...

FOR DAY 3 A MID LEVEL SHORTWAVE TROUGH DROPS RAPIDLY SE INTO THE 
LOWER MS VALLEY. OTHERWISE A FLAT MID LEVEL RIDGE WILL REMAIN 
OVER THE REGION. ON THE SURFACE DAY 3 THE ATLC RIDGE CENTER 
WEAKENS AS IT CONTINUES DRIFTING E TO NEAR 30N47W. ELY TRADES S 
OF 22N REMAIN MODERATE AS DO CARIB WINDS E OF 80W. THE E GULF 
FRONT DRIFTS E ACROSS FL WITH MOSTLY LIGHT WINDS.

FOR DAY 4 THE MID LEVEL TROUGH MAINTAINS IT'S STRENGTH AS IT 
MOVES TO 75W. THE MAIN VORTICITY SHOULD REMAIN JUST N OF OUR 
REGION. ON THE SURFACE DAY 4 WEAK CYCLOGENESIS DEVELOPS N OF THE 
AREA OFF THE MID ATLC HELPING MOVE THE FRONT E INTO THE NW 
BAHAMAS. WINDS PICK UP TO MODERATE N OF 27N W OF 65W. THE ATLC 
RIDGE MOVES E OF 40W BUT STRENGTHENS SOME WITH AN INCREASE IN 
ELY TRADES E OF 60W. CARIB WINDS DECREASE SLIGHTLY WITH THE 
DEPARTING ATLC RIDGE. GULF WINDS REMAIN LIGHT.

FOR DAY 5 A STILL VIGOROUS SHORTWAVE TROUGH BEGINS TO LIFT NE 
ALONG 64W. A SECONDARY MID LEVEL TROUGH HANGS BACK OVER THE SE 
COAST INTO THE NE GULF WITH MID LEVEL RIDGING BUILDING OVER THE 
NW GULF. ON THE SURFACE DAY 5 THE COLD FRONT PICKS UP A LITTLE 
STEAM AS IT MOVES E TO 31N65W 24N70W. STRONGEST WINDS SHOULD BE 
ON THE E SIDE N OF 27N AS THE FRONT PUSHES INTO THE ATLC RIDGE. 
OTHERWISE STRONGEST WINDS WILL BE ELY TRADES S OF 20N E OF 60W 
AT 20 KT. CARIB WINDS CHANGE LITTLE AS DO GULF WINDS.

WARNINGS...
ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER RRG