000
ABNT20 KNHC 312053
TWOAT 

SPECIAL TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
455 PM EDT SUN JUL 31 2011

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

SPECIAL OUTLOOK ISSUED TO UPDATE DISCUSSION OF THE ELONGATED AREA OF
LOW PRESSURE APPROACHING THE LESSER ANTILLES. 

UPDATED...COMMUNICATIONS PROBLEMS HAVE LIMITED THE AMOUNT OF DATA
RECEIVED FROM THE AIR FORCE RESERVE AIRCRAFT INVESTIGATING THE
ELONGATED AREA OF LOW PRESSURE LOCATED ABOUT 500 MILES EAST OF THE
NORTHERN WINDWARD ISLANDS.  HOWEVER...REPORTS FROM THE AIRCRAFT
...ALONG WITH SATELLITE IMAGERY AND SURFACE OBSERVATIONS...INDICATE
THAT THE SYSTEM DOES NOT YET HAVE A WELL-DEFINED SURFACE
CIRCULATION.  A SECOND AREA OF SHOWERS AND THUNDERSTORMS HAS FORMED
TO THE WEST OF THE MAIN DISTURBANCE...AND WILL BRING LOCALLY HEAVY
RAINFALL AND GUSTY WINDS TO PORTIONS OF THE LESSER ANTILLES
TONIGHT.  CONDITIONS ARE EXPECTED TO REMAIN FAVORABLE FOR A
TROPICAL DEPRESSION OR TROPICAL STORM TO FORM...AND THIS SYSTEM HAS
A HIGH CHANCE...NEAR 100 PERCENT...OF BECOMING A TROPICAL CYCLONE
DURING THE NEXT 48 HOURS AS IT MOVES WEST-NORTHWESTWARD NEAR 15
MPH.  IF THE SYSTEM BECOMES A TROPICAL CYCLONE TONIGHT OR MONDAY
...TROPICAL STORM WATCHES OR WARNINGS WOULD BE ISSUED FOR PORTIONS
OF THE NORTHERN WINDWARD ISLANDS AND THE LEEWARD ISLANDS ON VERY
SHORT NOTICE...AND INTERESTS IN THESE AREAS SHOULD CLOSELY MONITOR
THE PROGRESS OF THIS SYSTEM.  ANOTHER HURRICANE HUNTER AIRCRAFT IS
SCHEDULED TO INVESTIGATE THIS SYSTEM MONDAY MORNING. 

ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE
NEXT 48 HOURS.

$$
FORECASTER BRENNAN/FRANKLIN