750  
FONT15 KNHC 222035  
PWSAT5  
 
HURRICANE TAMMY WIND SPEED PROBABILITIES NUMBER 18  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL202023  
2100 UTC SUN OCT 22 2023  
 
AT 2100Z THE CENTER OF HURRICANE TAMMY WAS LOCATED NEAR LATITUDE  
19.9 NORTH...LONGITUDE 63.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR  
75 KTS...85 MPH...140 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  
18Z SUN 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 34...50...64 KT SHOWN WHEN THE 5-DAY  
64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT.  
 
 
- - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - -  
 
FROM FROM FROM FROM FROM FROM FROM  
TIME 18Z SUN 06Z MON 18Z MON 06Z TUE 18Z TUE 18Z WED 18Z THU  
PERIODS TO TO TO TO TO TO TO  
06Z MON 18Z MON 06Z TUE 18Z TUE 18Z WED 18Z THU 18Z FRI  
 
FORECAST HOUR (12) (24) (36) (48) (72) (96) (120)  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
LOCATION KT  
 
BERMUDA 34 X X( X) X( X) X( X) X( X) 5( 5) 16(21)  
BERMUDA 50 X X( X) X( X) X( X) X( X) 1( 1) 4( 5)  
BERMUDA 64 X X( X) X( X) X( X) X( X) X( X) 1( 1)  
 
PONCE PR 34 2 1( 3) 1( 4) X( 4) X( 4) X( 4) X( 4)  
 
AGUADILLA PR 34 2 1( 3) 1( 4) X( 4) X( 4) X( 4) X( 4)  
 
VIEQUES PR 34 2 3( 5) 1( 6) X( 6) X( 6) X( 6) X( 6)  
 
SAINT THOMAS 34 2 3( 5) 2( 7) 1( 8) X( 8) X( 8) X( 8)  
 
SAINT JOHN 34 2 3( 5) 2( 7) 1( 8) X( 8) X( 8) X( 8)  
 
SAINT CROIX 34 2 2( 4) 2( 6) X( 6) X( 6) X( 6) X( 6)  
 
SAINT MAARTEN 34 3 2( 5) 3( 8) 1( 9) X( 9) X( 9) X( 9)  
 
SABA 34 2 3( 5) 1( 6) 1( 7) X( 7) X( 7) X( 7)  
 
ST EUSTATIUS 34 2 3( 5) 1( 6) X( 6) X( 6) 1( 7) X( 7)  
 
ST KITTS-NEVIS 34 2 2( 4) 1( 5) X( 5) X( 5) X( 5) X( 5)  
 
BARBUDA 34 2 3( 5) 1( 6) X( 6) X( 6) X( 6) X( 6)  
 

 
FORECASTER CANGIALOSI  
 
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