425  
FONT15 KNHC 220257  
PWSAT5  
 
HURRICANE TAMMY WIND SPEED PROBABILITIES NUMBER 15  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL202023  
0300 UTC SUN OCT 22 2023  
 
AT 0300Z THE CENTER OF HURRICANE TAMMY WAS LOCATED NEAR LATITUDE  
17.8 NORTH...LONGITUDE 61.9 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  
00Z 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 00Z SUN 12Z SUN 00Z MON 12Z MON 00Z TUE 00Z WED 00Z THU  
PERIODS TO TO TO TO TO TO TO  
12Z SUN 00Z MON 12Z MON 00Z TUE 00Z WED 00Z THU 00Z FRI  
 
FORECAST HOUR (12) (24) (36) (48) (72) (96) (120)  
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
LOCATION KT  
 
BERMUDA 34 X X( X) X( X) X( X) X( X) 1( 1) 8( 9)  
 
PONCE PR 34 1 2( 3) 3( 6) 1( 7) 1( 8) 1( 9) X( 9)  
 
AGUADILLA PR 34 1 2( 3) 3( 6) 1( 7) 1( 8) 1( 9) X( 9)  
 
SAN JUAN PR 34 1 1( 2) 2( 4) 1( 5) 1( 6) 1( 7) X( 7)  
 
VIEQUES PR 34 2 3( 5) 3( 8) 1( 9) 3(12) 1(13) X(13)  
 
SAINT THOMAS 34 2 4( 6) 4(10) 2(12) 2(14) 2(16) X(16)  
 
SAINT JOHN 34 2 5( 7) 4(11) 2(13) 2(15) 2(17) X(17)  
 
SAINT CROIX 34 2 3( 5) 3( 8) 1( 9) 2(11) 1(12) X(12)  
 
SAINT MAARTEN 34 41 7(48) 2(50) 2(52) 1(53) 1(54) X(54)  
SAINT MAARTEN 50 9 1(10) X(10) X(10) X(10) X(10) 1(11)  
SAINT MAARTEN 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2)  
 
SABA 34 10 5(15) 3(18) 2(20) 1(21) 1(22) X(22)  
 
ST EUSTATIUS 34 14 4(18) 3(21) 1(22) 1(23) 1(24) X(24)  
 
ST KITTS-NEVIS 34 16 2(18) 3(21) 1(22) 1(23) 1(24) X(24)  
 
BARBUDA 34 99 X(99) X(99) X(99) X(99) X(99) X(99)  
BARBUDA 50 99 X(99) X(99) X(99) X(99) X(99) X(99)  
BARBUDA 64 99 X(99) X(99) X(99) X(99) X(99) X(99)  
 
ANTIGUA 34 99 X(99) X(99) X(99) X(99) X(99) X(99)  
 
GUADELOUPE 34 2 3( 5) 1( 6) X( 6) X( 6) X( 6) X( 6)  
 
AVES 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) 1( 5)  
 
DOMINICA 34 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3)  
 

 
FORECASTER PASCH  
 
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