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Hurricane Henri Forecast Advisory Number 23
2021-08-21 16:40:25| National Hurricane Center (Atlantic)
Issued at 1500 UTC SAT AUG 21 2021 000 WTNT23 KNHC 211440 TCMAT3 HURRICANE HENRI FORECAST/ADVISORY NUMBER 23 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082021 1500 UTC SAT AUG 21 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE HURRICANE WARNING FOR THE SOUTHERN COAST OF NEW ENGLAND HAS BEEN EXTENDED EASTWARD TO WEST OF WESTPORT MASSACHUSETTS...INCLUDING BLOCK ISLAND. THE TROPICAL STORM WARNING FOR THE COAST OF MASSACHUSETTS HAS BEEN EXTENDED EASTWARD TO CHATHAM...INCLUDING NANTUCKET. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * SOUTH SHORE OF LONG ISLAND FROM MASTIC BEACH TO MONTAUK POINT NEW YORK * NORTH SHORE OF LONG ISLAND FROM MONTAUK POINT TO FLUSHING NEW YORK * FLUSHING NEW YORK TO CHATHAM MASSACHUSETTS * NANTUCKET...MARTHA'S VINEYARD...AND BLOCK ISLAND A STORM SURGE WATCH IS IN EFFECT FOR... * EAST ROCKAWAY INLET TO MASTIC NEW YORK * NORTH OF CHATHAM MASSACHUSETTS TO SAGAMORE BEACH MASSACHUSETTS * CAPE COD BAY A HURRICANE WARNING IS IN EFFECT FOR... * SOUTH SHORE OF LONG ISLAND FROM FIRE ISLAND INLET TO MONTAUK POINT * NORTH SHORE OF LONG ISLAND FROM PORT JEFFERSON HARBOR TO MONTAUK POINT * NEW HAVEN CONNECTICUT TO WEST OF WESTPORT MASSACHUSETTS * BLOCK ISLAND A TROPICAL STORM WARNING IS IN EFFECT FOR... * PORT JEFFERSON HARBOR TO WEST OF NEW HAVEN CONNECTICUT * SOUTH SHORE OF LONG ISLAND FROM WEST OF FIRE ISLAND INLET TO EAST ROCKAWAY INLET * WESTPORT MASSACHUSETTS TO CHATHAM MASSACHUSETTS...INCLUDING MARTHA'S VINEYARD AND NANTUCKET * COASTAL NEW YORK AND NEW JERSEY WEST OF EAST ROCKAWAY INLET TO MANASQUAN INLET...INCLUDING NEW YORK CITY A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...DURING THE NEXT 36 HOURS IN THE INDICATED LOCATIONS. FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT HURRICANES.GOV. THIS IS A LIFE-THREATENING SITUATION. PERSONS LOCATED WITHIN THESE AREAS SHOULD TAKE ALL NECESSARY ACTIONS TO PROTECT LIFE AND PROPERTY FROM RISING WATER AND THE POTENTIAL FOR OTHER DANGEROUS CONDITIONS. PROMPTLY FOLLOW EVACUATION AND OTHER INSTRUCTIONS FROM LOCAL OFFICIALS. 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 TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS. 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. INTERESTS ELSEWHERE IN THE NORTHEASTERN U.S. SHOULD MONITOR THE PROGRESS OF HENRI. HURRICANE CENTER LOCATED NEAR 34.4N 72.5W AT 21/1500Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 20 DEGREES AT 12 KT ESTIMATED MINIMUM CENTRAL PRESSURE 991 MB MAX SUSTAINED WINDS 65 KT WITH GUSTS TO 80 KT. 64 KT....... 0NE 50SE 0SW 0NW. 50 KT....... 50NE 80SE 0SW 0NW. 34 KT....... 90NE 110SE 50SW 70NW. 12 FT SEAS..180NE 180SE 90SW 160NW. 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 34.4N 72.5W AT 21/1500Z AT 21/1200Z CENTER WAS LOCATED NEAR 33.6N 72.7W FORECAST VALID 22/0000Z 36.9N 71.9W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 20NE 25SE 0SW 0NW. 50 KT... 50NE 70SE 0SW 0NW. 34 KT...100NE 120SE 70SW 70NW. FORECAST VALID 22/1200Z 39.7N 71.9W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 20NE 25SE 0SW 0NW. 50 KT... 50NE 70SE 20SW 20NW. 34 KT...100NE 120SE 70SW 50NW. FORECAST VALID 23/0000Z 41.3N 72.6W...INLAND MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 60SE 30SW 10NW. 34 KT... 70NE 120SE 70SW 50NW. FORECAST VALID 23/1200Z 42.4N 72.9W...INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 40SE 0SW 0NW. FORECAST VALID 24/0000Z 43.1N 71.9W...POST-TROP/INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 24/1200Z 43.8N 69.2W...POST-TROP/INLAND MAX WIND 25 KT...GUSTS 35 KT. 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 25/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 34.4N 72.5W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 21/1800Z NEXT ADVISORY AT 21/2100Z $$ FORECASTER CANGIALOSI
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