[Tropical] Hurricane Local Statement

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Hurricane Ida Local Statement Advisory Number 11
National Weather Service New Orleans LA  AL092021
1110 PM CDT Sat Aug 28 2021

This product covers Southeast Louisiana and South Mississippi

**IDA FORECAST TO STRENGTHEN RAPIDLY BEFORE LANDFALL**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

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

* STORM INFORMATION:
    - About 240 miles southeast of New Orleans LA or about 190 miles
      southeast of Grand Isle LA
    - 27.2N 88.0W
    - Storm Intensity 105 mph
    - Movement Northwest or 325 degrees at 16 mph

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

Hurricane Ida in the central Gulf of Mexico continues to strengthen and
is expected to intensify up to landfall. Ida is anticipated to be a
major hurricane at landfall and will maintain hurricane strength well
inland providing damaging to destructive winds across the area. Life
threatening storm surge will impact most of the southeast Louisiana and
Mississippi coast Sunday through Monday. In addition Extremely heavy
rain of around 15-20 inches with locally higher amounts are expected.
Conditions are already starting to deteriorate near the coast and will
continue to go downhill overnight and through the day tomorrow. All
residents should have finalized their preparations. Remember, if your
local officials have ordered an evacuation, leave NOW otherwise it is
about time to shelter in place!

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

* SURGE:
Protect against life-threatening surge having possible catastrophic
impacts across all of coastal southeast Louisiana and portions of
coastal Mississippi west of Biloxi. These life-threatening impacts are
expected to occur Sunday into Monday. Potential impacts in this area
include:
    - Widespread deep inundation, with storm surge flooding greatly
      accentuated by powerful battering waves. Structural damage to
      buildings, with many washing away. Damage greatly compounded
      from considerable floating debris. Locations may be
      uninhabitable for an extended period.
    - Near-shore escape routes and secondary roads washed out or
      severely flooded. Flood control systems and barriers may become
      stressed.
    - Extreme beach erosion. New shoreline cuts possible.
    - Massive damage to marinas, docks, boardwalks, and piers.
      Numerous small craft broken away from moorings with many lifted
      onshore and stranded.

Also, protect against life-threatening surge having possible
significant to devastating impacts across portions of coastal
Mississippi east of Biloxi and along the shores of Lake Pontchartrain
outside of the hurricane levee protection and Lake Maurepas. These
life-threatening impacts are expected to occur Sunday into Monday.

* WIND:
Protect against life-threatening wind having possible devastating
impacts across portions of Southeast Louisiana including metro New
Orleans, metro Baton Rouge, Hammond, Grand Isle, and the Houma
metropolitan area. These life-threatening wind impacts are expected to
begin overnight along the Louisiana coast and then spread inland to
the New Orleans, Houma, and Baton Rouge metro areas on Sunday.
Potential impacts in this area include:
    - Structural damage to sturdy buildings, some with complete roof
      and wall failures. Complete destruction of mobile homes. Damage
      greatly accentuated by large airborne projectiles. Locations
      may be uninhabitable for weeks or months.
    - Numerous large trees snapped or uprooted along with fences and
      roadway signs blown over.
    - Many roads impassable from large debris, and more within urban
      or heavily wooded places. Many bridges, causeways, and access
      routes impassable.
    - Widespread power and communications outages.

Also, protect against life-threatening wind having possible limited to
extensive impacts across portions of Southeast Louisiana to the east
of the I-55 corridor. This includes the Northshore as well as all of
Coastal and Southwest Mississippi. These life- threatening wind impacts
are expected to occur as early as Sunday.


* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
devastating impacts across most of Southeast Louisiana including the
Baton Rouge, New Orleans, and Houma metro areas and across portions of
Southwest Mississippi along the I-55 corridor. These life-threatening
rainfall impacts are expected to begin as early as tonight and continue
through Monday. Potential impacts include:
    - Extreme rainfall flooding may prompt numerous evacuations and
      rescues.
    - Rivers and tributaries may overwhelmingly overflow their banks
      in many places with deep moving water. Small streams, creeks,
      canals, and ditches may become raging rivers. Flood control
      systems and barriers may become stressed.
    - Flood waters can enter numerous structures within multiple
      communities, some structures becoming uninhabitable or washed
      away. Numerous places where flood waters may cover escape
      routes. Streets and parking lots become rivers of raging water
      with underpasses submerged. Driving conditions become very
      dangerous. Numerous road and bridge closures with some weakened
      or washed out.

Protect against life-threatening rainfall flooding having possible
extensive impacts across the remainder of Southeast Louisiana,
Southwest Mississippi, and Coastal Mississippi. These life-threatening
impacts are expected to begin as early as tonight and continue through
Monday.

* 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:

The time is to prepare and evacuate is coming to an end quickly. Do so
now or shelter in place. Do not enter evacuated areas until officials
have given the all clear to return.

* OTHER PREPAREDNESS INFORMATION:

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.

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.

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 5 AM CDT, or sooner if conditions
warrant.

$$
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