INVEST 90L

[LSU TIGERS]

SATELLITE IMAGERY AND SURFACE OBSERVATIONS INDICATE THAT A BROAD LOW
PRESSURE AREA HAS FORMED OVER THE CENTRAL ATLANTIC OCEAN ABOUT
700 MILES NORTHEAST OF THE LEEWARD ISLANDS. WHILE THE ASSOCIATED
CLOUDINESS AND SHOWERS ARE POORLY ORGANIZED...CONTINUED SLOW
DEVELOPMENT OF THIS SYSTEM IS POSSIBLE DURING THE NEXT COUPLE OF
DAYS AS IT MOVES SLOWLY NORTHWARD. THERE IS A MEDIUM CHANCE...
30 PERCENT...OF SUBTROPICAL OR TROPICAL CYCLONE FORMATION FROM THIS
SYSTEM DURING THE NEXT 48 HOURS.

[Her-icane]

[Her-icane]

[Her-icane]

[dkmac]

7AM

TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
700 AM EST SUN NOV 20 2011

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

1. SHOWER AND THUNDERSTORM ACTIVITY ASSOCIATED WITH A LOW PRESSURE
SYSTEM LOCATED ABOUT 550 MILES NORTHEAST OF THE NORTHEASTERN
LEEWARD ISLANDS HAS BECOME SLIGHTLY BETTER ORGANIZED DURING THE
LAST SEVERAL HOURS. CONTINUED SLOW DEVELOPMENT OF THIS DISTURBANCE
IS POSSIBLE DURING THE NEXT DAY OR TWO AS IT MOVES SLOWLY NORTHWARD
INTO A REGION OF MORE FAVORABLE UPPER-LEVEL WINDS. THIS SYSTEM HAS
A MEDIUM CHANCE...50 PERCENT...OF BECOMING A SUBTROPICAL OR
TROPICAL CYCLONE DURING THE NEXT 48 HOURS.

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

$$
FORECASTER KIMBERLAIN
NNNN

[ROLLTIDE]

8AM

Return to Atlantic Graphical TWO
1. SHOWERS AND THUNDERSTORMS HAVE BECOME MORE CONCENTRATED NORTH OF A BROAD LOW PRESSURE SYSTEM LOCATED ABOUT 875 MILES NORTHEAST OF THE NORTHEASTERN LEEWARD ISLANDS OVERNIGHT. SATELLITE DATA INDICATE THAT WINDS TO NEAR GALE-FORCE ARE OCCURRING IN ASSOCIATION WITH THIS SYSTEM. HOWEVER...THE CIRCULATION OF THE LOW IS NOT WELL- DEFINED AT THIS TIME. ENVIRONMENTAL CONDITIONS ARE MARGINALLY CONDUCIVE FOR ADDITIONAL DEVELOPMENT...AND THIS SYSTEM COULD ACQUIRE SUBTROPICAL CHARACTERISTICS BEFORE IT MOVES OVER COOLER WATER IN A COUPLE OF DAYS. THIS SYSTEM HAS A HIGH CHANCE...60 PERCENT...OF BECOMING A SUBTROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES NORTH- NORTHEASTWARD TO NORTHEASTWARD AT 10 TO 15 MPH. ADDITIONAL INFORMATION ON THIS LARGE WEATHER SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC.