National Weather Service Raw Text Product

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Tropical Storm Henri Local Statement Advisory Number 20
National Weather Service New York NY  AL082021
527 PM EDT Fri Aug 20 2021

This product covers Southeast New York, Northeast New Jersey, and Southern Connecticut

**HURRICANE CONDITIONS EXPECTED ACROSS PORTIONS OF LONG ISLAND AND 
SOUTHERN CONNECTICUT** 

NEW INFORMATION
---------------

* CHANGES TO WATCHES AND WARNINGS:
    - The Hurricane Watch has been upgraded to a Hurricane Warning 
      for Southwest Suffolk
    - The Tropical Storm Watch has been upgraded to a Tropical Storm 
      Warning for Northern Nassau, Southern Nassau, and Southern 
      Westchester
    - The Storm Surge Watch has been upgraded to a Storm Surge 
      Warning and the Tropical Storm Watch has been upgraded to a 
      Tropical Storm Warning for Southern Fairfield
    - A Tropical Storm Watch has been issued for Bronx, Eastern 
      Bergen, Eastern Essex, Eastern Union, Hudson, Kings (Brooklyn), 
      New York (Manhattan), Northern Queens, Northern Westchester, 
      Richmond (Staten Island), and Southern Queens
    - The Hurricane Watch has been upgraded to a Hurricane Warning 
      and the Storm Surge Watch has been upgraded to a Storm Surge 
      Warning for Northeast Suffolk, Northwest Suffolk, Southeast 
      Suffolk, Southern Middlesex, Southern New Haven, and Southern 
      New London

* CURRENT WATCHES AND WARNINGS:
    - A Hurricane Warning and Storm Surge Watch are in effect for 
      Southwest Suffolk
    - A Storm Surge Warning and Tropical Storm Warning are in effect 
      for Southern Fairfield
    - A Tropical Storm Watch is in effect for Eastern Bergen, Eastern 
      Essex, Eastern Union, Hudson, Kings (Brooklyn), New York 
      (Manhattan), Northern Fairfield, Northern Westchester, Richmond 
      (Staten Island), and Southern Queens
    - A Storm Surge Watch and Tropical Storm Watch are in effect for 
      Bronx and Northern Queens
    - A Hurricane Watch is in effect for Northern Middlesex, Northern 
      New Haven, and Northern New London
    - A Tropical Storm Warning and Storm Surge Watch are in effect 
      for Northern Nassau, Southern Nassau, and Southern Westchester
    - A Storm Surge Warning and Hurricane Warning are in effect for 
      Northeast Suffolk, Northwest Suffolk, Southeast Suffolk, 
      Southern Middlesex, Southern New Haven, and Southern New London

* STORM INFORMATION:
    - About 660 miles south of New York City NY or about 690 miles 
      south of Montauk Point NY
    - 31.2N 73.9W
    - Storm Intensity 70 mph
    - Movement North-northwest or 340 degrees at 7 mph

SITUATION OVERVIEW
------------------

Tropical Storm Henri is currently 660 miles south of New York City NY or
about 690 miles south of Montauk Point NY. Henri will likely track north
nearing eastern Long Island and southern New England Sunday as a Category 1
Hurricane. 

The main threats from Henri are potentially life-threatening storm
surge, heavy rain capable of producing flash flooding, tropical storm
or hurricane force winds across Long Island and across southern Connecticut.
Tropical storm conditions are also possible as far west as the New York
City Metro. There will also be associated marine and coastal hazards, including
very rough seas and dangerous rip currents. 

A widespread rainfall of 3 to 6 inches is forecast in the path of
Henri with localized higher amounts possible Sunday through Sunday
night. The highest amounts are forecast to be along and west of the 
center of Henri. This will present a likelihood for areas of flash
flooding.

Dangerous marine conditions are likely on the waters surrounding Long 
Island, including the Long Island Bays. Severe beach erosion is also possible. 
Dangerous rip currents are expected at ocean beaches.  


POTENTIAL IMPACTS
-----------------

* WIND:
Prepare for life-threatening wind having possible extensive impacts 
across eastern Long Island and southern Connecticut. Potential impacts
in this area include:
    - Considerable roof damage to sturdy buildings, with some having 
      window, door, and garage door failures leading to structural 
      damage. Mobile homes severely damaged, with some destroyed. 
      Damage accentuated by airborne projectiles. Locations may be 
      uninhabitable for weeks.
    - Many large trees snapped or uprooted along with fences and 
      roadway signs blown over.
    - Some roads impassable from large debris, and more within urban 
      or heavily wooded places. Several bridges, causeways, and 
      access routes impassable.
    - Large areas with power and communications outages.

Also, prepare for significant impacts from wind across the New York City
metro, portions of the Lower Hudson Valley, and northeast New Jersey. 

* SURGE:
Prepare for life-threatening surge having possible significant 
impacts across all coastal areas of Long Island Sound, and much of
the Great South Bay and southeast coast of Long Island.  
Potential impacts in this area include:
    - Areas of inundation with storm surge flooding accentuated by 
      waves. Damage to several buildings, mainly near the coast.
    - Sections of near shore escape routes and secondary roads become 
      weakened or washed out, especially in usually vulnerable low 
      spots. Flood control systems and barriers may become stressed.
    - Major beach erosion with heavy surf breaching dunes. Very 
      dangerous surf and rip currents.
    - Moderate damage to marinas, docks, boardwalks, and piers. 
      Several small craft broken away from moorings, especially in 
      unprotected anchorages.

Also, prepare for locally hazardous surge having limited 
impacts across Jamaica Bay, New York Harbor, and north facing locations
of Jones Beach and Fire Island.

* FLOODING RAIN:
Prepare for life-threatening rainfall flooding having possible 
extensive impacts across Long Island and southern Connecticut. Potential 
impacts include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Rivers and streams may rapidly overflow their banks in multiple 
      places. Small streams, creeks, canals, and ditches may become 
      dangerous rivers. Flood control systems and barriers may become 
      stressed.
    - In hilly terrain of Connecticut, destructive runoff may run quickly
      down valleys, and increase susceptibility to rockslides and 
      mudslides. 
    - Flood waters can enter many structures within multiple 
      communities, some structures becoming uninhabitable or washed 
      away. Many places where flood waters may cover escape routes. 
      Streets and parking lots become rivers of moving water with 
      underpasses submerged. Driving conditions become dangerous. 
      Many road and bridge closures with some weakened or washed out.

Prepare for rainfall flooding having possible significant 
impacts across the rest of the area.

* TORNADOES:
Little to no impacts are anticipated at this time across Southeast New
York, Northeast New Jersey, and Southern Connecticut.

PRECAUTIONARY/PREPAREDNESS ACTIONS
----------------------------------

* EVACUATIONS:
Listen to local officials for recommended preparedness actions, including
possible evacuation. If ordered to evacuate, do so immediately.

If evacuating, follow designated evacuation routes. Seek traffic information
on roadway signs, on the radio, and from official sources.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to check your emergency plan and emergency supplies 
kit and take necessary actions to protect your family and secure your 
home or business.

When making safety and preparedness decisions, do not focus on the 
exact forecast track, since hazards such as flooding rain, damaging 
wind gusts, storm surge, and tornadoes can extend well away from the 
center of the storm.

If you live in a place particularly vulnerable to flooding, such as 
near the ocean, in a low lying or poor drainage area, in a valley, or 
near a river, plan to move to safe shelter on higher ground.

When securing your property, outside preparations should be completed 
as soon as possible before conditions deteriorate. The onset of 
strong winds or flooding can cause certain preparedness activities to 
become unsafe.

Closely monitor http://weather.gov, NOAA Weather Radio, and local 
news outlets for official storm information. Listen for possible 
changes to the forecast.


* ADDITIONAL SOURCES OF INFORMATION:
- For information on appropriate preparations see http://ready.gov
- For information on creating an emergency plan see 
http://getagameplan.org
- For additional disaster preparedness information see 
http://redcross.org

NEXT UPDATE
-----------

The next local statement will be issued by the National Weather 
Service in New York NY around 12 AM EDT, or sooner if conditions 
warrant.

$$