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Hurricane Helene Forecast Advisory Number 20
2018-09-12 10:34:06| National Hurricane Center (Atlantic)
Issued at 0900 UTC WED SEP 12 2018 273 WTNT23 KNHC 120834 TCMAT3 HURRICANE HELENE FORECAST/ADVISORY NUMBER 20 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018 0900 UTC WED SEP 12 2018 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. INTERESTS IN THE AZORES SHOULD MONITOR THE PROGRESS OF HELENE. HURRICANE CENTER LOCATED NEAR 19.2N 35.7W AT 12/0900Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 335 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 977 MB EYE DIAMETER 20 NM MAX SUSTAINED WINDS 80 KT WITH GUSTS TO 100 KT. 64 KT....... 40NE 30SE 30SW 40NW. 50 KT....... 70NE 60SE 60SW 90NW. 34 KT.......150NE 110SE 90SW 140NW. 12 FT SEAS..240NE 240SE 300SW 300NW. 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 19.2N 35.7W AT 12/0900Z AT 12/0600Z CENTER WAS LOCATED NEAR 18.7N 35.6W FORECAST VALID 12/1800Z 20.7N 36.6W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 40NE 30SE 10SW 40NW. 50 KT... 70NE 60SE 60SW 80NW. 34 KT...150NE 110SE 90SW 140NW. FORECAST VALID 13/0600Z 22.9N 37.2W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 60NE 60SE 60SW 80NW. 34 KT...140NE 110SE 80SW 110NW. FORECAST VALID 13/1800Z 25.5N 37.3W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 60NE 60SE 50SW 60NW. 34 KT...140NE 120SE 80SW 100NW. FORECAST VALID 14/0600Z 28.9N 36.9W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 60NE 50SE 40SW 40NW. 34 KT...130NE 120SE 70SW 90NW. FORECAST VALID 15/0600Z 36.0N 34.3W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 50NE 50SE 30SW 30NW. 34 KT...120NE 130SE 60SW 70NW. 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 16/0600Z 41.0N 28.5W MAX WIND 50 KT...GUSTS 60 KT. OUTLOOK VALID 17/0600Z 45.5N 19.0W MAX WIND 50 KT...GUSTS 60 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 19.2N 35.7W NEXT ADVISORY AT 12/1500Z $$ FORECASTER ZELINSKY
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