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TROPICAL STORM HENRI FORECAST/ADVISORY NUMBER  20
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL082021
2100 UTC FRI AUG 20 2021
 
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
 
A STORM SURGE WARNING IS IN EFFECT FOR THE SOUTH SHORE OF LONG
ISLAND FROM MASTIC BEACH TO MONTAUK POINT...THE NORTH SHORE OF
LONG ISLAND FROM OYSTER BAY TO MONTAUK POINT...FROM GREENWICH 
CONNECTICUT TO CHATHAM MASSACHUSETTS...INCLUDING NANTUCKET...
MARTHA'S VINEYARD...AND BLOCK ISLAND.
 
A HURRICANE WARNING IS IN EFFECT FOR THE SOUTH SHORE OF LONG ISLAND
FROM FIRE ISLAND INLET TO MONTAUK POINT...FOR THE NORTH SHORE OF
LONG ISLAND FROM PORT JEFFERSON HARBOR TO MONTAUK POINT...AND FROM 
NEW HAVEN CONNECTICUT...TO WEST OF WATCH HILL RHODE ISLAND.
 
A TROPICAL STORM WARNING IS IN EFFECT FROM WEST OF PORT JEFFERSON
HARBOR TO WEST OF NEW HAVEN CONNECTICUT...AND FOR THE SOUTH SHORE
OF LONG ISLAND FROM WEST OF FIRE ISLAND INLET TO EAST ROCKAWAY
INLET.
 
A TROPICAL STORM WATCH IN EFFECT FROM MANASQUAN INLET NEW JERSEY TO 
WEST OF EAST ROCKAWAY INLET NEW YORK...INCLUDING NEW YORK CITY.
 
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
* NORTH SHORE OF LONG ISLAND FROM OYSTER BAY TO MONTAUK POINT
* GREENWICH CONNECTICUT TO CHATHAM MASSACHUSETTS
* NANTUCKET...MARTHA'S VINEYARD...AND BLOCK ISLAND
 
A STORM SURGE WATCH IS IN EFFECT FOR...
* SOUTH SHORE OF LONG ISLAND FROM WEST OF MASTIC BEACH TO EAST
ROCKAWAY INLET
* NORTH SHORE OF LONG ISLAND FROM WEST OF OYSTER BAY TO FLUSHING
* FLUSHING NEW YORK TO WEST OF GREENWICH CONNECTICUT
* 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 WATCH HILL RHODE ISLAND
 
A HURRICANE WATCH IS IN EFFECT FOR...
* WATCH HILL RHODE ISLAND TO SAGAMORE BEACH MASSACHUSETTS
* NANTUCKET...MARTHA'S VINEYARD...AND 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
 
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* MANASQUAN INLET NEW JERSEY TO WEST OF EAST ROCKAWAY INLET NEW
YORK...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.
 
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 TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS.
 
INTERESTS ELSEWHERE IN THE NORTHEASTERN U.S. AND ATLANTIC CANADA
SHOULD MONITOR THE PROGRESS OF HENRI.  ADDITIONAL WATCHES OR
WARNINGS WILL LIKELY BE REQUIRED LATER TONIGHT OR SATURDAY.
 
TROPICAL STORM CENTER LOCATED NEAR 31.2N  73.9W AT 20/2100Z
POSITION ACCURATE WITHIN  25 NM
 
PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT   6 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  994 MB
MAX SUSTAINED WINDS  60 KT WITH GUSTS TO  75 KT.
50 KT....... 50NE  50SE   0SW   0NW.
34 KT....... 90NE 100SE  50SW  70NW.
12 FT SEAS..180NE 120SE  60SW 150NW.
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 31.2N  73.9W AT 20/2100Z
AT 20/1800Z CENTER WAS LOCATED NEAR 30.8N  73.8W
 
FORECAST VALID 21/0600Z 32.8N  73.3W
MAX WIND  65 KT...GUSTS  80 KT.
64 KT... 20NE  25SE   0SW   0NW.
50 KT... 50NE  50SE   0SW   0NW.
34 KT...100NE 110SE  90SW  50NW.
 
FORECAST VALID 21/1800Z 35.8N  72.3W
MAX WIND  75 KT...GUSTS  90 KT.
64 KT... 20NE  25SE   0SW   0NW.
50 KT... 50NE  60SE  20SW  20NW.
34 KT...110NE 130SE 100SW  50NW.
 
FORECAST VALID 22/0600Z 38.9N  71.9W
MAX WIND  75 KT...GUSTS  90 KT.
64 KT... 20NE  25SE  10SW   0NW.
50 KT... 50NE  60SE  30SW  20NW.
34 KT...100NE 130SE  90SW  60NW.
 
FORECAST VALID 22/1800Z 40.8N  72.4W
MAX WIND  65 KT...GUSTS  80 KT.
64 KT... 20NE  25SE   0SW   0NW.
50 KT... 40NE  50SE  30SW  30NW.
34 KT... 80NE 100SE  70SW  60NW.
 
FORECAST VALID 23/0600Z 42.0N  72.8W...INLAND
MAX WIND  45 KT...GUSTS  55 KT.
34 KT... 50NE  80SE  50SW  30NW.
 
FORECAST VALID 23/1800Z 42.9N  72.6W...POST-TROPICAL
MAX WIND  30 KT...GUSTS  40 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 24/1800Z 43.8N  68.9W...POST-TROPICAL
MAX WIND  25 KT...GUSTS  35 KT.
 
OUTLOOK VALID 25/1800Z...DISSIPATED
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 31.2N  73.9W
 
INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 21/0000Z
 
NEXT ADVISORY AT 21/0300Z
 
$$
FORECASTER CANGIALOSI
 
 
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