[Tropical] Hurricane Local Statement

Tue Aug 4 04:20:54 CDT 2020

WTUS81 KPHI 040920
HLSPHI
DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ070-071-101>106-041730-

Tropical Storm Isaias Local Statement Advisory Number 29
National Weather Service Mount Holly NJ  AL092020
520 AM EDT Tue Aug 4 2020

This product covers NEW JERSEY...DELAWARE...SOUTHEASTERN PENNSYLVANIA AND NORTHEAST MARYLAND

**Isaias Will Impact the Area this Morning through Tonight**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning is in effect for Atlantic, Atlantic
      Coastal Cape May, Camden, Cape May, Caroline, Cecil, Coastal
      Atlantic, Coastal Ocean, Cumberland, Delaware, Delaware
      Beaches, Eastern Chester, Eastern Monmouth, Eastern Montgomery,
      Gloucester, Hunterdon, Inland Sussex, Kent, Kent MD, Lower
      Bucks, Mercer, Middlesex, Morris, New Castle, Northwestern
      Burlington, Ocean, Philadelphia, Queen Annes, Salem, Somerset,
      Southeastern Burlington, Sussex, Talbot, Upper Bucks, Warren,
      Western Chester, Western Monmouth, and Western Montgomery

* STORM INFORMATION:
    - About 270 miles southwest of Atlantic City NJ or about 220
      miles south-southwest of Dover DE
    - 36.3N 77.5W
    - Storm Intensity 70 mph
    - Movement North-northeast or 20 degrees at 28 mph

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

Tropical Storm Isaias is currently approaching the North Carolina/
Virginia border and will continue northward and then northeastward
along the East Coast of the United States. Isaias will approach the
Delmarva early this morning and pass through the region today. Impacts
will diminish late this afternoon into tonight.

The main threats with this system are heavy rain resulting in
widespread flash flooding as well as river flooding, and strong to
damaging winds, especially near the coast. In addition, minor to
potentially moderate coastal flooding, and dangerous marine conditions
will occur.

Four to six inches of rain with locally higher amounts will result in
flash flooding. Strong winds along the New Jersey and Delaware coasts
with wind gusts of 65 to 75 mph are possible, and wind gusts inland
will range from 50 to 60 mph. Secondary threats include minor to
locally moderate coastal flooding, especially in Chesapeake Bay, as
well as the potential for isolated tornadoes. Dangerous rip currents
and 12 to 18 foot seas are also expected over the waters.

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

* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
extensive impacts across the Delmarva, western New Jersey, and eastern
Pennsylvania. Potential impacts include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Rivers and tributaries may rapidly overflow their banks in
      multiple places. Small streams, creeks, canals, and ditches may
      become dangerous rivers. In hilly terrain, destructive runoff
      may run quickly down valleys while increasing susceptibility to
      rockslides and mudslides. Flood control systems and barriers may
      become stressed.
    - 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.

Protect against dangerous rainfall flooding having possible
significant impacts across coastal New Jersey and Delaware.

* WIND:
Protect against dangerous wind having possible significant impacts
across New Jersey, the Delmarva, and much of southeastern Pennsylvania.
Potential impacts in this area include:
    - Some damage to roofing and siding materials, along with damage
      to porches, awnings, carports, and sheds. A few buildings
      experiencing window, door, and garage door failures. Mobile
      homes damaged, especially if unanchored. Unsecured lightweight
      objects become dangerous projectiles.
    - Several large trees snapped or uprooted, but with greater
      numbers in places where trees are shallow rooted. Several
      fences and roadway signs blown over.
    - Some roads impassable from large debris, and more within urban
      or heavily wooded places. A few bridges, causeways, and access
      routes impassable.
    - Scattered power and communications outages, but more prevalent
      in areas with above ground lines.

Also, protect against hazardous wind having possible limited impacts
across east central Pennsylvania.

* SURGE:
Protect against life-threatening surge having possible significant
impacts across Delaware Bay, the tidal Delaware River, northeastern
Chesapeake Bay, and the Atlantic coasts of New Jersey and Delaware.
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.
    - Major beach erosion with heavy surf breaching dunes. Strong and
      numerous rip currents.
    - Moderate damage to marinas, docks, boardwalks, and piers.
      Several small craft broken away from moorings, especially in
      unprotected anchorages.

Elsewhere across NEW JERSEY...DELAWARE...SOUTHEASTERN PENNSYLVANIA AND
NORTHEAST MARYLAND, little to no impact is anticipated.

* TORNADOES:
Protect against a tornado event having possible limited impacts across
New Jersey, Delaware, southeastern Pennsylvania, and northeast
Maryland. Potential impacts include:
    - The occurrence of isolated tornadoes can hinder the execution
      of emergency plans during tropical events.
    - A few places may experience tornado damage, along with power
      and communications disruptions.
    - Locations could realize roofs peeled off buildings, chimneys
      toppled, mobile homes pushed off foundations or overturned,
      large tree tops and branches snapped off, shallow-rooted trees
      knocked over, moving vehicles blown off roads, and small boats
      pulled from moorings.

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

* PREPAREDNESS INFORMATION:
If heading to a community shelter, become familiar with the shelter
rules before arrival, especially if you have special needs or have
pets. Take essential items with you from your Emergency Supplies Kit.

Keep cell phones well charged. Cell phone chargers for automobiles can
be helpful, but be aware of your risk for deadly carbon monoxide
poisoning if your car is left idling in a garage or other poorly
ventilated area.

It is important to remain calm, informed, and focused during an
emergency. Be patient and helpful with those you encounter.

If you are a visitor, be sure to know the name of the city or town in
which you are staying and the name of the county or parish in which
it resides. Listen for these locations in local news updates. Pay
attention for instructions from local authorities.

Rapidly rising flood waters are deadly. If you are in a flood-prone
area, consider moving to higher ground. Never drive through a flooded
roadway. Remember, turn around don't drown!

If a Tornado Warning is issued for your area, be ready to shelter
quickly, preferably away from windows and in an interior room not
prone to flooding. If driving, scan the roadside for quick shelter
options.

If in a place that is vulnerable to high wind, such as near large
trees, a manufactured home, upper floors of a high-rise building, or
on a boat, consider moving to a safer shelter before the onset of
strong winds or flooding.

Closely monitor weather.gov, NOAA Weather radio or local news outlets
for official storm information. Be ready to adapt to possible changes
to the forecast. Ensure you have multiple ways to receive weather
warnings.

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

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

The next local statement will be issued by the National Weather
Service in Mount Holly NJ around 11 AM EDT, or sooner if conditions
warrant.

$$
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