[Tropical] Hurricane Local Statement

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Hurricane Delta Local Statement Advisory Number 17
National Weather Service New Orleans LA  AL262020
434 PM CDT Thu Oct 8 2020

This product covers Southeast Louisiana and South Mississippi

...DELTA MOVING NORTHWESTWARD OVER THE GULF OF MEXICO...

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

* CHANGES TO WATCHES AND WARNINGS:
    - The Storm Surge Watch has been cancelled for St. Charles, Upper
      Jefferson, and Upper Plaquemines

* CURRENT WATCHES AND WARNINGS:
    - A Storm Surge Warning and Tropical Storm Warning are in effect
      for Assumption, Lower Jefferson, Lower Lafourche, Lower
      Plaquemines, Lower St. Bernard, Lower Terrebonne, Orleans,
      Southern Tangipahoa, St. Tammany, Upper Lafourche, Upper St.
      Bernard, and Upper Terrebonne
    - A Tropical Storm Warning and Storm Surge Watch are in effect
      for Ascension, Iberville, Livingston, and St. John The Baptist
    - A Tropical Storm Warning is in effect for Amite, East Baton
      Rouge, East Feliciana, Northern Tangipahoa, Pointe Coupee, St.
      Charles, St. Helena, St. James, Upper Jefferson, Upper
      Plaquemines, West Baton Rouge, West Feliciana, and Wilkinson
    - A Storm Surge Warning and Tropical Storm Watch are in effect
      for Hancock
    - A Storm Surge Warning is in effect for Harrison
    - A Tropical Storm Watch is in effect for Pearl River, Pike,
      Walthall, and Washington

* STORM INFORMATION:
    - About 410 miles south-southwest of New Orleans LA or about 370
      miles southwest of Grand Isle LA
    - 24.8N 93.4W
    - Storm Intensity 115 mph
    - Movement Northwest or 320 degrees at 12 mph

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

At 400 PM CDT (2100 UTC), the center of Hurricane Delta was located
near latitude 22.1 North, longitude 89.5 West. Delta is moving toward
the northwest near 17 mph (28 km/h). A northwestward motion with a
reduction in forward speed is expected through early Thursday. A
north-northwestward motion is expected by late Thursday, and a faster
northward to north-northeastward motion is forecast on Friday and
Friday night. On the forecast track, the center of Delta will move
over the southern and central Gulf of Mexico through Thursday, and
approach the northern Gulf coast within the hurricane watch area on
Friday. Delta is forecast to move inland within the hurricane watch
area by late Friday or Friday night.

Data from an Air Force Reserve Hurricane Hunter aircraft indicate that
the maximum sustained winds are near 85 mph (140 km/h) with higher
gusts. Re-strengthening is forecast when the hurricane moves over the
southern and central Gulf of Mexico through Thursday, and Delta is
expected to become a major hurricane again. Some weakening is is
forecast as Delta approaches the northern Gulf coast on Friday.

The main concerns will be storm surge along the coast and tidal lakes,
strong and gusty winds, and heavy rainfall.

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

* SURGE:
Protect against life-threatening surge having possible devastating
impacts across coastal areas of Lower Terrebonne Parish. Potential
impacts in this area include:
    - Large areas of deep inundation with storm surge flooding
      accentuated by battering waves. Structural damage to buildings,
      with several washing away. Damage compounded by floating
      debris. Locations may be uninhabitable for an extended period.
    - Large sections of near-shore escape routes and secondary roads
      washed out or severely flooded. Flood control systems and
      barriers may become stressed.
    - Severe beach erosion with significant dune loss.
    - Major damage to marinas, docks, boardwalks, and piers. Many
      small craft broken away from moorings, especially in
      unprotected anchorages with some lifted onshore and stranded.

Also, protect against life-threatening surge having possible
significant to extensive impacts across coastal areas outside of the
levee protection system in Lower Lafourche, Lower Jefferson, Lower
Plaquemines, Lower St. Bernard, Orleans, St. Tammany, and Tangipahoa
Parishes in Louisiana and coastal areas of Hancock and Harrison
Counties in Mississippi.

Also, protect against locally hazardous surge having possible limited
impacts across coastal areas of Jackson County in Mississippi and
Upper Jefferson and Orleans Parishes in Louisiana. Also for
nearshore areas of Lake Pontchartrain and Lake Maurepas in Livingston,
St. John the Baptist, and St. Charles Parishes.

* WIND:
Protect against life-threatening wind having possible extensive impacts
across portions of Pointe Coupee Parish. 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, protect against dangerous wind having possible limited to
significant impacts across the remainder of Southeast Louisiana
and Southern Mississippi.

* FLOODING RAIN:
Protect against dangerous rainfall flooding having possible
significant impacts across portions of Southeast Louisiana and
Southwest Mississippi generally along and to the west of the I-55
corridor. Potential impacts include:

    - Moderate rainfall flooding may prompt several evacuations and
      rescues.
    - Rivers and tributaries may quickly become swollen with swifter
      currents and overspill their banks in a few places, especially
      in usually vulnerable spots. Small streams, creeks, canals, and
      ditches overflow.
    - Flood waters can enter some structures or weaken foundations.
      Several places may experience expanded areas of rapid
      inundation at underpasses, low-lying spots, and poor drainage
      areas. Some streets and parking lots take on moving water as
      storm drains and retention ponds overflow. Driving conditions
      become hazardous. Some road and bridge closures.

Protect against locally hazardous rainfall flooding having possible
limited impacts across the remainder of Southeast Louisiana and
Southern Mississippi.

* TORNADOES:
Protect against a tornado event having possible limited impacts
across Southeast Louisiana and South Mississippi. 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
----------------------------------

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

For those not under evacuation orders, assess the risk from wind, falling
trees, and flooding at your location. If you decide to move, relocate to
a safer location nearby. If you do not relocate, help keep roadways open
for those under evacuation orders.

If evacuating, leave with a destination in mind and allow extra time
to get there. Take your emergency supplies kit. Gas up your vehicle
ahead of time.

Let others know where you are going prior to departure. Secure loose
items and pets in the car, and avoid distracted driving.

OTHER PREPAREDNESS INFORMATION:

Now is the time to complete all preparations to protect life and
property in accordance with your emergency plan. Ensure you are in a
safe location before the onset of strong winds or possible flooding.

If you are relocating to safe shelter, leave as early as possible.
Allow extra time to reach your destination. Many roads and bridges
will be closed once strong winds arrive. Check the latest weather
forecast before departing and drive with caution.

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.

Failure to adequately shelter may result in serious injury or loss of
life. Always heed the advice of local officials and comply with any
orders that are issued. Remember, during the storm 9 1 1 Emergency
Services may not be able to immediately respond if conditions are
unsafe. This should be a big factor in your decision making.

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.

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.

Storm surge is the leading killer associated with tropical storms and
hurricanes! Make sure you are in a safe area away from the surge
zone. Even if you are not in a surge-prone area, you could find
yourself cutoff by flood waters during and after the storm. Heed
evacuation orders issued by the 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 New Orleans LA around 11 PM CDT, or sooner if conditions
warrant.

$$
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