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Tropical Storm Henri Advisory Number 28
NWS National Hurricane Center Miami FL AL082021
500 PM EDT Sun Aug 22 2021
...HENRI WEAKENS A LITTLE MORE WHILE MOVING WEST-NORTHWESTWARD
ACROSS CENTRAL CONNECTICUT...
...HEAVY RAINFALL AND FLOODING EXPECTED ACROSS PORTIONS OF SOUTHERN
NEW ENGLAND AND THE NORTHERN MID-ATLANTIC STATES THROUGH MONDAY...
SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION
ABOUT 100 MI...160 KM NE OF NEW YORK CITY
ABOUT 20 MI...35 KM SE OF HARTFORD CONNECTICUT
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
All coastal Tropical Storm Warnings have been discontinued.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
There are no coastal watches or warnings in effect.
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 500 PM EDT (2100 UTC), the center of Tropical Storm Henri was
located by surface observations and and NOAA Doppler weather radars
near latitude 41.6 North, longitude 72.4 West. Henri is moving
toward the west-northwest near 7 mph (11 km/h), and this general
motion with a decrease in forward speed is expected through early
Monday morning. A slow turn toward the north is expected Monday
morning, followed by a motion toward the east-northeast Monday
afternoon. On the forecast track, Henri is expected to slow down
further and possibly stall near the Connecticut-New York border
tonight, then move across northern Connecticut or southern
Massachusetts by Monday afternoon.
Maximum sustained winds have decreased to near 40 mph (65 km/h) with
higher gusts. Additional weakening is forecast during the next
couple of days, and Henri is expected to become a tropical
depression this evening and degenerate into a post-tropical remnant
low by Monday afternoon.
Tropical-storm-force winds extend outward up to 35 miles (55 km)
from the center, mainly over Long Island Sound. A sustained wind of
29 mph (47 km/h) and a gust to 42 mph (68 km/h) were recently
measured by a private weather station at Orient Point on eastern
The estimated minimum central pressure based on nearby surface
observations is 997 mb (29.44 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
RAINFALL: Henri is expected to produce storm total rainfall of 3 to
6 inches with locally higher amounts expected over portions of Long
Island, New England, southeast New York, New Jersey, and northeast
Pennsylvania Sunday into Monday. Isolated maximum totals of 10 to 12
inches are possible across northern New Jersey into southern New
York. Heavy rainfall from Henri will continue to result in
considerable flash, urban, and small stream flooding, along with the
potential for additional minor to isolated moderate river flooding.
For the latest rainfall reports and wind gusts associated with
Henri at the following link:
WIND: Wind gusts to tropical storm force are possible along
coastal areas of Connecticut and northern Long Island during the
next few hours.
SURF: Swells are expected to continue 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
Next intermediate advisory at 800 PM EDT.
Next complete advisory at 1100 PM EDT.