[Tropical] Hurricane Local Statement

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WTUS84 KLIX 241536
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LAZ034>037-039-040-046>050-056>072-MSZ068>071-077-080>082-242345-

Tropical Storm Marco Local Statement Advisory Number 17
National Weather Service New Orleans LA  AL142020
1036 AM CDT Mon Aug 24 2020

This product covers Southeast Louisiana and South Mississippi

MARCO CONTINUES TO PRODUCE HEAVY RAINFALL AND GUSTY WINDS ALONG
PORTIONS OF THE NORTHERN GULF COAST

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

* CHANGES TO WATCHES AND WARNINGS:
    - A Tropical Storm Warning has been issued for Ascension,
      Livingston, and Southern Tangipahoa

* CURRENT WATCHES AND WARNINGS:
    - A Storm Surge Warning and Tropical Storm Warning are in effect
      for Hancock, Harrison, Lower Jefferson, Lower Lafourche, Lower
      Plaquemines, Lower St. Bernard, Lower Terrebonne, Orleans,
      Upper Plaquemines, and Upper St. Bernard
    - A Tropical Storm Warning is in effect for Ascension,
      Assumption, Jackson, Livingston, Southern Tangipahoa, St.
      Charles, St. James, St. John The Baptist, St. Tammany, Upper
      Jefferson, Upper Lafourche, and Upper Terrebonne

* STORM INFORMATION:
    - About 150 miles southeast of New Orleans LA or about 100 miles
      east-southeast of Grand Isle LA
    - 28.5N 88.5W
    - Storm Intensity 50 mph
    - Movement North-northwest or 330 degrees at 8 mph

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

Tropical Storm Marco will continue to approach the coast of
Southeast Louisiana today. Marco is expected to turn west and move
parallel to the Louisiana coast throughout the day while weakening.

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

* WIND:
Potential impacts from the main wind event are now unfolding across
the Louisiana coastal areas. Remain well sheltered from dangerous
wind having possible significant impacts. If
realized, these impacts 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.

Potential impacts from the main wind event are also now unfolding
across the lower Louisiana parishes. Remain well sheltered from
hazardous wind having possible limited impacts.

* SURGE:
Potential impacts from the main surge event are now unfolding across
lower Louisiana parishes. Remain well away from life-threatening
surge having possible significant impacts. If
realized, these impacts 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.

Potential impacts from the main surge event are also now unfolding
across the lower Louisiana parishes. Remain well away from locally
hazardous surge having possible limited impacts.

Elsewhere across Southeast Louisiana and South Mississippi, little to
no impact is anticipated.

* FLOODING RAIN:
Potential impacts from the flooding rain have not developed yet.
Remain well guarded against dangerous flood waters having possible significant impacts.
If realized, these 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.

Potential impacts from the flooding rain have not developed yet.
Remain well guarded against locally hazardous flood waters having possible
limited impacts.

* TORNADOES:
Potential impacts from tornadoes are still unfolding across Southeast
Louisiana and South Mississippi. Remain well braced against a tornado
event having possible limited impacts. If
realized, these 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:
Do not enter evacuated areas until officials have given the all clear to return.

* OTHER PREPAREDNESS INFORMATION:

If you are prone to flooding or in an area under a storm surge watch
or warning, be prepared for the possibility of a quick and dramatic
rise in water levels.

If a tornado warning is issued for your area, quickly move to the
safest place within your shelter. Protect your head and body.

* 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 2 PM CDT, or sooner if conditions
warrant.

$$
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