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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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