655  
FONT12 KNHC 112038  
PWSAT2  
TROPICAL STORM FRED WIND SPEED PROBABILITIES NUMBER 17  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL072009  
2100 UTC FRI SEP 11 2009  
 
AT 2100Z THE CENTER OF TROPICAL STORM FRED WAS LOCATED NEAR LATITUDE  
18.1 NORTH...LONGITUDE 34.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR  
60 KTS...70 MPH...110 KM/HR.  
 
Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH)  
ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME  
EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME  
CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME  
 
 
I. MAXIMUM WIND SPEED (INTENSITY) PROBABILITY TABLE  
 
CHANCES THAT THE MAXIMUM SUSTAINED (1-MINUTE AVERAGE) WIND SPEED OF  
THE TROPICAL CYCLONE WILL BE WITHIN ANY OF THE FOLLOWING CATEGORIES  
AT EACH OFFICIAL FORECAST TIME DURING THE NEXT 5 DAYS.  
PROBABILITIES ARE GIVEN IN PERCENT. X INDICATES PROBABILITIES LESS  
THAN 1 PERCENT.  
 
 
- - - MAXIMUM WIND SPEED (INTENSITY) PROBABILITIES - - -  
 
VALID TIME 06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE 18Z WED  
FORECAST HOUR 12 24 36 48 72 96 120  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
DISSIPATED X 2 8 15 24 30 31  
TROP DEPRESSION 2 14 35 40 36 34 30  
TROPICAL STORM 81 76 52 41 36 32 34  
HURRICANE 17 9 4 5 5 4 5  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
HUR CAT 1 16 8 3 4 4 4 4  
HUR CAT 2 1 1 1 1 1 1 1  
HUR CAT 3 1 X X X X X X  
HUR CAT 4 X X X X X X X  
HUR CAT 5 X X X X X X X  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
FCST MAX WIND 55KT 45KT 35KT 30KT 25KT 20KT 20KT  
 
 
II. WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS  
 
CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST  
...34 KT (39 MPH... 63 KPH)...  
...50 KT (58 MPH... 93 KPH)...  
...64 KT (74 MPH...119 KPH)...  
FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS  
 
PROBABILITIES FOR LOCATIONS ARE GIVEN AS IP(CP) WHERE  
IP IS THE PROBABILITY OF THE EVENT BEGINNING DURING  
AN INDIVIDUAL TIME PERIOD (INDIVIDUAL PROBABILITY)  
(CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN  
18Z FRI AND THE FORECAST HOUR (CUMULATIVE PROBABILITY)  
 
PROBABILITIES ARE GIVEN IN PERCENT  
X INDICATES PROBABILITIES LESS THAN 1 PERCENT  
PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN  
THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT.  
PROBABILITIES FOR 64 KT ARE SHOWN WHEN THE 5-DAY CUMULATIVE  
PROBABILITY IS AT LEAST 1 PERCENT.  
 
 
- - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - -  
 
FROM FROM FROM FROM FROM FROM FROM  
TIME 18Z FRI 06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE  
PERIODS TO TO TO TO TO TO TO  
06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE 18Z WED  
 
FORECAST HOUR (12) (24) (36) (48) (72) (96) (120)  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
LOCATION KT  
 
 
FORECASTER AVILA  
 
 
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