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HURRICANE ISAIAS FORECAST/ADVISORY NUMBER  18
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092020
1500 UTC SAT AUG 01 2020
 
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
 
THE TROPICAL STORM WATCH FROM THE VOLUSIA/FLAGLER COUNTY LINE TO
PONTE VEDRA BEACH FLORIDA HAS BEEN CHANGED TO A TROPICAL STORM
WARNING.
 
A TROPICAL STORM WATCH HAS BEEN ISSUED FROM NORTH OF PONTE VEDRA
BEACH FLORIDA TO ALTAMAHA SOUND GEORGIA.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A HURRICANE WARNING IS IN EFFECT FOR...
* BOCA RATON TO THE VOLUSIA/FLAGLER COUNTY LINE FLORIDA
* NORTHWESTERN BAHAMAS
 
A HURRICANE WATCH IS IN EFFECT FOR...
* HALLANDALE BEACH TO SOUTH OF BOCA RATON FLORIDA
 
A STORM SURGE WATCH IS IN EFFECT FOR...
* JUPITER INLET TO PONTE VEDRA BEACH FLORIDA
 
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* NORTH OF OCEAN REEF TO SOUTH OF BOCA RATON FLORIDA
* LAKE OKEECHOBEE
* VOLUSIA/FLAGLER COUNTY LINE TO PONTE VEDRA BEACH FLORIDA
 
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* NORTH OF PONTE VEDRA BEACH FLORIDA TO ALTAMAHA SOUND GEORGIA
 
INTERESTS ELSEWHERE ALONG THE SOUTHEAST COAST OF THE UNITED STATES
SHOULD MONITOR THE PROGRESS OF ISAIAS.  ADDITIONAL WATCHES OR
WARNINGS MAY BE REQUIRED LATER TODAY.
 
A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA. A WARNING IS TYPICALLY ISSUED
36 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF
TROPICAL-STORM-FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE
PREPARATIONS DIFFICULT OR DANGEROUS.  PREPARATIONS TO PROTECT LIFE
AND PROPERTY SHOULD BE RUSHED TO COMPLETION.
 
A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE
WITHIN THE WATCH AREA.  A WATCH IS TYPICALLY ISSUED 48 HOURS
BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE
WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR
DANGEROUS.
 
A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE-
THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE
COASTLINE...IN THE INDICATED LOCATIONS DURING THE NEXT 48 HOURS.
FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER
SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT
HURRICANES.GOV.
 
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.
 
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS.
 
HURRICANE CENTER LOCATED NEAR 24.7N  77.9W AT 01/1500Z
POSITION ACCURATE WITHIN  20 NM
 
PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT  10 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  987 MB
MAX SUSTAINED WINDS  70 KT WITH GUSTS TO  85 KT.
64 KT....... 20NE  15SE   0SW  20NW.
50 KT....... 50NE  30SE   0SW  30NW.
34 KT.......100NE  70SE  30SW 100NW.
12 FT SEAS..210NE 150SE  45SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT.  RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
 
REPEAT...CENTER LOCATED NEAR 24.7N  77.9W AT 01/1500Z
AT 01/1200Z CENTER WAS LOCATED NEAR 24.3N  77.5W
 
FORECAST VALID 02/0000Z 25.7N  78.8W
MAX WIND  70 KT...GUSTS  85 KT.
64 KT... 20NE  15SE   0SW  20NW.
50 KT... 50NE  30SE   0SW  30NW.
34 KT...100NE  70SE  30SW 100NW.
 
FORECAST VALID 02/1200Z 27.1N  79.7W
MAX WIND  70 KT...GUSTS  85 KT.
64 KT... 20NE  15SE   0SW  20NW.
50 KT... 50NE  30SE   0SW  30NW.
34 KT...100NE  70SE  30SW  90NW.
 
FORECAST VALID 03/0000Z 28.5N  80.3W
MAX WIND  70 KT...GUSTS  85 KT.
64 KT... 20NE  15SE  10SW  20NW.
50 KT... 50NE  30SE  20SW  30NW.
34 KT...100NE  70SE  30SW  80NW.
 
FORECAST VALID 03/1200Z 30.1N  80.4W
MAX WIND  65 KT...GUSTS  80 KT.
64 KT... 20NE  15SE  10SW  20NW.
50 KT... 50NE  30SE  20SW  30NW.
34 KT...100NE  80SE  30SW  80NW.
 
FORECAST VALID 04/0000Z 32.6N  79.4W
MAX WIND  60 KT...GUSTS  75 KT.
50 KT... 50NE  40SE  20SW  30NW.
34 KT...100NE  90SE  30SW  80NW.
 
FORECAST VALID 04/1200Z 36.0N  76.9W...INLAND
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 40NE  40SE   0SW  20NW.
34 KT...110NE 100SE  50SW  60NW.
 
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
 
OUTLOOK VALID 05/1200Z 43.3N  69.7W...OVER WATER
MAX WIND  45 KT...GUSTS  55 KT.
 
OUTLOOK VALID 06/1200Z 49.0N  57.9W...POST-TROP/EXTRATROP
MAX WIND  40 KT...GUSTS  50 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 24.7N  77.9W
 
INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 01/1800Z
 
NEXT ADVISORY AT 01/2100Z
 
$$
FORECASTER STEWART
 
 
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