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BULLETIN
Tropical Storm Henri Intermediate Advisory Number 26A
NWS National Hurricane Center Miami FL       AL082021
800 AM EDT Sun Aug 22 2021
 
...CENTER OF HENRI MOVING CLOSER EASTERN LONG ISLAND AND SOUTHERN 
NEW ENGLAND...
...DANGEROUS STORM SURGE, STRONG GUSTY WINDS, AND FLOODING RAINFALL 
ARE EXPECTED IN PORTIONS OF THE NORTHEASTERN UNITED STATES...
 
 
SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION
----------------------------------------------
LOCATION...40.7N 71.3W
ABOUT 40 MI...65 KM SSE OF MONTAUK POINT NEW YORK
ABOUT 75 MI...125 KM S OF PROVIDENCE RHODE ISLAND
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NNW OR 345 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...986 MB...29.12 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
The Hurricane Warning for Long Island, the southern coast of New 
England, and Block Island has been changed to a Tropical Storm 
Warning. 
 
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 Tropical Storm Warning is in effect for...
* Manasquan Inlet New Jersey to Chatham Massachusetts, including 
Long Island and New York City
* Block Island, Nantucket and Martha's Vineyard
 
A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline. 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 Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
 
A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline. 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.
 
For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 800 AM EDT (1200 UTC), the center of Tropical Storm Henri was 
located by reconnaissance aircraft and NOAA Doppler weather radars 
near latitude 40.7 North, longitude 71.3 West. Henri is moving 
toward the north-northwest near 16 mph (26 km/h). A north- 
northwestward motion with a decrease in forward speed is expected 
this morning. On the forecast track, Henri is expected to make 
landfall in southern New England or on Long Island later this 
morning or early this afternoon.  After landfall, a turn back toward 
the north and an even slower forward speed are expected as Henri 
moves over southern New England.
 
Maximum sustained winds are near 70 mph (110 km/h) with higher 
gusts.  Some slight weakening will be possible this morning, but 
Henri is still forecast to be a strong tropical storm when it 
reaches the coasts of southern New England and Long island.  Rapid 
weakening is expected after Henri makes landfall.
 
Tropical-storm-force winds extend outward up to 125 miles (205 
km). A Weatherflow station on Block Island, Rhode Island, recently 
reported a sustained wind of 41 mph (66 km/h) and a gust to 50 mph 
(80 km/h). A Weatherflow station near Narragansett, Rhode Island, 
recently measured a sustained wind of 44 mph (71 km/h) and a gust to 
55 mph (89 km/h). 
 
The latest minimum central pressure estimated from Air Force 
Reserve reconnaissance aircraft data is 986 mb (29.12 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Henri can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC
and on the web at
www.hurricanes.gov/graphics_at3.shtml?key_messages.
 
STORM SURGE:  The combination of a dangerous storm surge and the
tide will cause normally dry areas near the coast to be flooded by
rising waters moving inland from the shoreline.  The water could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...
 
Flushing, NY to Chatham, MA including Narragansett Bay, Buzzards
Bay, Vineyard Sound, and Nantucket Sound...3-5 ft
North shore of Long Island from Flushing to Montauk Point, NY
including Long Island Sound...3-5 ft
South shore of Long Island from Mastic Beach to Montauk Point,
NY...3-5 ft
Chatham, MA to Sagamore Beach, MA including Cape Cod Bay...2-4 ft
South shore of Long Island from East Rockaway Inlet to Mastic Beach,
NY...2-4 ft
Cape May, NJ to East Rockaway Inlet, NY...1-3 ft
Sagamore Beach, MA to Merrimack River including Massachusetts
Bay...1-3 ft
 
The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
dangerous waves.  Surge-related flooding depends on the relative
timing of the surge and the tidal cycle, and can vary greatly over
short distances.  For information specific to your area, please see
products issued by your local National Weather Service forecast
office.
 
WIND:  Tropical storm conditions are expected to continue in the 
tropical storm warning area into tonight.
 
RAINFALL:  Henri is expected to produce rainfall amounts of 3 to 6
inches over portions of Long Island, New England, southeast New
York, New Jersey, and northeast Pennsylvania today into Monday, with
isolated maximum totals near 10 inches. Heavy rainfall from Henri
may result in considerable flash, urban, and small stream flooding,
along with the potential for widespread minor to isolated moderate
river flooding.
 
TORNADOES:  A tornado or two may occur today over southern
New England.
 
SURF:  Swells generated by Henri should continue to affect Bermuda
today.  Swells are expected to increase across much of the east
coast of the U.S. and Atlantic Canada today and continue into
Monday.  These swells could cause life-threatening surf and rip
current conditions.  Please consult products from your local
weather office.
 
 
NEXT ADVISORY
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Next complete advisory at 1100 AM EDT.
 
$$
Forecaster Stewart
 
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