481  
FNUS72 KNHC 081906  
FWSNHC  
 
SPOT FORECAST FOR ALTA...USCG DISTRICT 5  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
306 PM EDT MON OCT 8 2018  
 
FORECAST IS BASED ON FORECAST START TIME OF 1500 EDT ON OCTOBER 08.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NWS  
NATIONAL HURRICANE CENTER/TROPICAL ANALYSIS AND FORECAST  
BRANCH AT (305)229-4425.  
   
DISCUSSION
 
TROPICAL STORM LESLIE NEAR 34.6N 47.0W 989 MB AT  
11 AM EDT MOVING ESE AT 12 KT. MAXIMUM SUSTAINED WINDS 45 KT  
GUSTS 55 KT. LESLIE WILL MOVE TO 33.6N 45.2W THIS EVENING, 32.0N  
43.5W TUE MORNING, 30.2N 42.2W TUE EVENING, 29.1N 41.2W WED  
MORNING, AND STRENGTHEN TO A HURRICANE NEAR 29.5N 37.0W THU  
MORNING. LESLIE WILL CHANGE LITTLE IN INTENSITY AS IT MOVES TO THE  
33.0N 28.0W EARLY FRI, AND CONTINUE TO THE 39.0N 18.0W EARLY SAT.  
SWELL FROM TROPICAL STORM LESLIE WILL REACH THE LOCATION MONDAY  
NIGHT, INCREASING TO NEAR 10 FT BY TUESDAY NIGHT. LESLIE IS  
CURRENTLY FORECAST TO PASS ABOUT 400 NM NE OF THE LOCATION  
TUESDAY NIGHT AND WEDNESDAY.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT).  
MAX HUMIDITY........81 PERCENT.  
DEWPOINT............71.  
SURFACE WINDS (KT)..SOUTH WINDS AROUND 7 KNOTS BECOMING LIGHT.  
SWELL HEIGHT........NORTH SWELL 5 FEET.  
WAVE HEIGHT.........8 FEET.  
WAVE PERIOD.........12 SECONDS.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........64 64 65 65 65 62 62 62 61 61 61 63  
DEWPOINT........72 72 72 72 72 72 72 72 71 71 71 70  
RH..............80 80 79 79 79 79 79 79 79 79 79 77  
SURFACE WND DIR.SE SE SE SE SE S S S S S S S  
SURFACE WND SPD.7 7 7 7 7 7 7 7 7 7 7 4  
SURFACE WND GST.10 10 10 10 10 10 10 10 10 10 10 7  
SWELL DIRECTION.N N N N N N N N N N N N  
SWELL HGT (FT)..4 4 5 5 5 5 5 5 6 6 6 6  
WAVE PERIOD (S).11 11 11 11 11 11 11 11 12 12 12 12  
WAVE HEIGHT (FT)6 6 7 7 7 7 7 7 7 7 7 8  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT).  
MIN HUMIDITY........83 PERCENT.  
DEWPOINT............70.  
SURFACE WINDS (KT)..LIGHT WINDS BECOMING SOUTHWEST AROUND 5 KNOTS  
EARLY IN THE MORNING.  
SWELL HEIGHT........NORTHWEST SWELL 6 FEET.  
WAVE HEIGHT.........8 FEET.  
WAVE PERIOD.........12 SECONDS.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........63 63 67 67 67 69 69 69 66 66 66 63  
DEWPOINT........70 70 70 70 70 70 70 70 70 70 70 70  
RH..............77 77 74 74 74 72 72 72 72 72 72 74  
SURFACE WND DIR.S S S S S S S S S S S SW  
SURFACE WND SPD.4 4 5 5 5 5 5 5 5 5 5 5  
SURFACE WND GST.7 7 8 8 8 8 8 8 8 8 8 8  
SWELL DIRECTION.N N N N N N N N NW NW NW NW  
SWELL HGT (FT)..6 6 6 6 6 6 6 6 7 7 7 7  
WAVE PERIOD (S).12 12 12 12 12 12 12 12 12 12 12 12  
WAVE HEIGHT (FT)8 8 8 8 8 8 8 8 8 8 8 8  
   
TUESDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT).  
MAX HUMIDITY........100 PERCENT.  
DEWPOINT............70.  
SURFACE WINDS (KT)..SOUTHWEST WINDS 5 TO 8 KNOTS.  
SWELL HEIGHT........NORTH SWELL 7 FEET.  
WAVE HEIGHT.........9 FEET.  
WAVE PERIOD.........13 SECONDS.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........63 63 60 60 60 58 58 58 57 57 57 53  
DEWPOINT........70 70 70 70 70 70 70 70 70 70 70 71  
RH..............74 74 76 76 76 77 77 77 76 76 76 78  
SURFACE WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW  
SURFACE WND SPD.5 5 7 7 7 7 7 7 8 8 8 8  
SURFACE WND GST.8 8 9 9 9 10 10 10 13 13 13 13  
SWELL DIRECTION.NW NW NW NW NW NW NW NW N N N N  
SWELL HGT (FT)..7 7 7 7 7 7 7 7 8 8 8 8  
WAVE PERIOD (S).12 12 12 12 12 12 12 12 13 13 13 13  
WAVE HEIGHT (FT)8 8 8 8 8 8 8 8 9 9 9 9  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).  
MIN HUMIDITY........68 PERCENT.  
DEWPOINT............70.  
SURFACE WINDS (KT)..WEST WINDS 8 TO 9 KNOTS.  
SWELL HEIGHT........NORTH SWELL 9 FEET.  
WAVE HEIGHT.........11 FEET.  
WAVE PERIOD.........13 SECONDS.  
 
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........53 53 54 54 54 54 54 54 53 53 53 52  
DEWPOINT........71 71 71 71 71 71 71 71 70 70 70 70  
RH..............78 78 79 79 79 78 78 78 76 76 76 76  
SURFACE WND DIR.SW SW W W W W W W W W W W  
SURFACE WND SPD.8 8 9 9 9 9 9 9 9 9 9 8  
SURFACE WND GST.13 13 14 14 14 14 14 14 14 14 14 13  
SWELL DIRECTION.N N N N N N N N N N N N  
SWELL HGT (FT)..8 8 9 9 9 9 9 9 10 10 10 10  
WAVE PERIOD (S).13 13 13 13 13 13 13 13 13 13 13 13  
WAVE HEIGHT (FT)9 9 10 10 10 10 10 10 10 10 10 11  
 

 
FORECASTER...LEWITSKY  
REQUESTED BY...LT RADICE  
TYPE OF REQUEST...MARINE  
.TAG 1816635.0/NHC  
.DELDT 10/08/18  
.EMAIL JAMES.T.RADICE@USCG.MIL  
 
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