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#1010601 (Received by flhurricane at: 10:48 AM 01.Aug.2020) TCMAT4 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 |