000
ABNT20 KNHC 112331
TWOAT 
TROPICAL WEATHER OUTLOOK
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
800 PM EDT SAT SEP 11 2010

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

THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON TROPICAL
STORM IGOR...LOCATED ABOUT 1140 MILES WEST OF THE CAPE VERDE
ISLANDS.

SHOWERS AND THUNDERSTORMS HAVE DECREASED IN ASSOCIATION WITH A
BROAD AREA OF LOW PRESSURE LOCATED OVER THE EAST-CENTRAL CARIBBEAN
SEA. HOWEVER...ENVIRONMENTAL CONDITIONS APPEAR CONDUCIVE FOR
DEVELOPMENT OF THIS SYSTEM...AND A TROPICAL DEPRESSION COULD FORM
DURING THE NEXT COUPLE OF DAYS AS IT MOVES WESTWARD INTO THE
CENTRAL AND WESTERN CARIBBEAN SEA.  THERE IS A HIGH CHANCE...60
PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE
NEXT 48 HOURS.  REGARDLESS OF DEVELOPMENT...LOCALLY HEAVY RAINFALL
IS POSSIBLE IN THE NORTHERN LEEWARD ISLANDS...PUERTO RICO...THE
VIRGIN ISLANDS...AND HISPANIOLA DURING THE NEXT DAY OR SO.  THESE
RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD
SLIDES...ESPECIALLY IN MOUNTAINOUS TERRAIN.  

SATELLITE IMAGERY INDICATES THAT SHOWER AND THUNDERSTORMS ASSOCIATED
WITH A VIGOROUS TROPICAL WAVE AND ASSOCIATED LOW PRESSURE ABOUT 400
MILES EAST-SOUTHEAST OF THE CAPE VERDE ISLANDS ARE GRADUALLY
BECOMING BETTER ORGANIZED.  IF CURRENT TRENDS CONTINUE...A TROPICAL
DEPRESSION COULD FORM DURING THE NEXT DAY OR TWO AS THIS SYSTEM
MOVES TOWARD THE WEST-NORTHWEST AT 10 TO 15 MPH.  THERE IS A HIGH
CHANCE...70 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE
DURING THE NEXT 48 HOURS.  

SHOWERS ACTIVITY HAS DEVELOPED IN ASSOCIATION WITH A WEAK LOW
PRESSURE SYSTEM LOCATED ABOUT 900 MILES EAST OF BERMUDA.
DEVELOPMENT OF THIS SYSTEM APPEARS UNLIKELY BEFORE IT IS ABSORBED
BY A FRONTAL SYSTEM.  THERE IS A LOW CHANCE...10 PERCENT...OF THIS
SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS.

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

$$
FORECASTER KIMBERLAIN/BEVEN