416  
FONT11 KNHC 211434  
PWSAT1  
 
POST-TROPICAL CYCLONE ARLENE WIND SPEED PROBABILITIES NUMBER 9  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL012017  
1500 UTC FRI APR 21 2017  
 
AT 1500Z THE CENTER OF POST-TROPICAL CYCLONE ARLENE WAS LOCATED NEAR  
LATITUDE 39.3 NORTH...LONGITUDE 49.9 WEST WITH MAXIMUM SUSTAINED  
WINDS NEAR 45 KTS...50 MPH...85 KM/H.  
 
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  
 
WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS  
 
CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST  
...34 KT (39 MPH... 63 KM/H)...  
...50 KT (58 MPH... 93 KM/H)...  
...64 KT (74 MPH...119 KM/H)...  
FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS  
 
PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE  
OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING  
AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY)  
(CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN  
12Z 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 12Z FRI 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE  
PERIODS TO TO TO TO TO TO TO  
00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE 12Z WED  
 
FORECAST HOUR (12) (24) (36) (48) (72) (96) (120)  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
LOCATION KT  
 

 
FORECASTER AVILA  
 
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