000
AGXX40 KNHC 220559
MIMATS

MARINE WEATHER DISCUSSION     
NWS NATIONAL HURRICANE CENTER MIAMI FL
200 AM EDT FRI JUL 22 2011

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

GULF OF MEXICO...
HIGH PRES RIDGE ALONG 27N COMBINED WITH LOW PRES OVER CENTRAL 
PLAINS HAS TIGHTENED THE PRES GRADIENT ACROSS THE FAR NW GULF 
WITH SLY WINDS INCREASING TO 15-20 KT. OTHERWISE REMAINDER OF 
GULF HAS MOSTLY LIGHT WINDS. CONDITIONS EXPECTED TO CHANGE 
LITTLE IN SPITE OF WEAK TROPICAL WAVE WHICH ENTERS GULF LATE 
TONIGHT AND CONTINUES MOVING W THROUGH SUN. HIGH PRES BUILDS 
ACROSS THE CENTRAL GULF WITH A WEAKENING OF THE PRES GRADIENT 
MON AND TUE WITH LIGHT WINDS ACROSS THE ENTIRE AREA.

SW N ATLC...
HIGH PRES RIDGE ALONG 28N EXPECTED TO DRIFT N TO 29N/30N AS 
TROPICAL WAVE MOVES ALONG ITS SOUTHERN PERIPHERY. THE WAVE 
PRESENTLY EXPECTED TO AFFECT EXTREME SE PART OF ZONE EARLY SUN 
THROUGH MON. RIDGE AXIS BUILDS BACK S AFTER THE WAVE PASSAGE. 
THE RIDGE SHIFTS E AS A TROUGH APPROACHES THE SE COAST. THE 
GRADIENT TIGHTENS SOME BETWEEN THE RIDGE AND TROUGH AND SLY 
WINDS INCREASE TO 15-20 KT ACROSS THE NW PORTION OF THE AREA. 

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W... 
ATL HIGH PRES RIDGE AND LOW PRES OVER COLOMBIA PRODUCING STRONG 
WINDS ACROSS MUCH OF THE AREA...WITH STRONGEST WINDS UP TO 30 KT 
NEAR THE COAST OF COLOMBIA. THE PRES GRADIENT WEAKENS EARLY NEXT 
WEEK WITH WINDS DECREASING TO 15-20 KT ACROSS THE CENTRAL 
CARIBBEAN AND LESS THEN 20 KT ELSEWHERE.

WARNINGS...

GULF OF MEXICO...
.NONE.
 
SW N ATLC...
.NONE.

CARIBBEAN AND TROPICAL N ATLC...
.NONE.

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

$$
FORECASTER DGS