[Tropical] Hurricane Local Statement

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Hurricane Hanna Local Statement Advisory Number 12
National Weather Service Houston/Galveston TX  AL082020
457 PM CDT Sat Jul 25 2020

This product covers Southeast Texas

**Hurricane Hanna Nearing the Central and South Texas Coastline**

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

* CHANGES TO WATCHES AND WARNINGS:
    - The Tropical Storm Warning has been cancelled for Jackson and
      Matagorda counties

* CURRENT WATCHES AND WARNINGS:
    - A Storm Surge Warning is in effect for Coastal Jackson, Coastal
      Matagorda, and Matagorda Islands

* STORM INFORMATION:
    - About 230 miles southwest of Galveston TX or about 140 miles
      south-southwest of Matagorda TX
    - 26.8N 97.2W
    - Storm Intensity 90 mph
    - Movement West-southwest or 255 degrees at 8 mph

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

Category 1 Hurricane Hanna has turned west-southwestward and is
within hours of making landfall along the Central and Lower Texas
Coast. Rapid weakening is expected after Hanna moves inland towards
Nuevo Leon region of Mexico.

Locally, strong winds and high seas will continue to produce dangerous
marine conditions across the bays and Gulf waters as well as hazardous
beach conditions. At the coast, two to four feet of storm surge is
expected from Sargent on down the Gulf and Matagorda Bay coast, and
one to two feet of storm surge is expected from Sargent up the coast
through High Island. The surge combined with elevated tides will lead
to minor coastal flooding. The strongest wind field should remain over
the Gulf waters adjacent to Matagorda Bay. Inland, rainbands generated
from Hanna will move into Southeast Texas throughout the day today and
tonight. The most concerning threat remains the potential for flooding
rains, followed by elevated seas and tides. Gusty winds are also
expected to occur in the warning area, and a few brief tornadoes
cannot be ruled out in the strongest parts of any outer bands. Two to
four inches of rain with isolated amounts of six to eight inches are
expected across the southernmost counties of Southeast Texas with
lower amounts expected elsewhere.

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

* FLOODING RAIN:
Potential impacts from the flooding rain are still unfolding across
the Southeast Texas Coastal Plain. 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.


Protect against locally hazardous rainfall flooding having possible
limited impacts across inland Southeast Texas.

* SURGE:
Potential impacts from the main surge event are now unfolding across
the Matagorda Bay area. Remain well away from locally hazardous
surge having possible limited impacts. If realized, these impacts include:
    - Localized inundation with storm surge flooding mainly along
      immediate shorelines and in low-lying spots, or in areas
      farther inland near where higher surge waters move ashore.
    - Sections of near-shore roads and parking lots become overspread
      with surge water. Driving conditions dangerous in places where
      surge water covers the road.
    - Moderate beach erosion. Heavy surf also breaching dunes, mainly
      in usually vulnerable locations. Strong rip currents.
    - Minor to locally moderate damage to marinas, docks, boardwalks,
      and piers. A few small craft broken away from moorings.

Also, protect against locally hazardous surge having possible limited
impacts across the Galveston Bay area.

* WIND:
Potential impacts from the main wind event are now unfolding across
the Texas Gulf Coast and Matagorda Bay area. Remain well sheltered from hazardous
wind having possible limited impacts. If realized, these impacts include:
    - Damage to porches, awnings, carports, sheds, and unanchored
      mobile homes. Unsecured lightweight objects blown about.
    - Many large tree limbs broken off. A few trees snapped or
      uprooted, but with greater numbers in places where trees are
      shallow rooted. Some fences and roadway signs blown over.
    - A few roads impassable from debris, particularly within urban
      or heavily wooded places. Hazardous driving conditions on
      bridges and other elevated roadways.
    - Scattered power and communications outages.

Elsewhere across Southeast Texas, little to no impact is anticipated.

* TORNADOES:
The potential for impacts due to isolated tornadoes will continue
through the event across portions of southeast Texas. These impacts
may 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.

Elsewhere across Southeast Texas, little to no impact is anticipated.

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

* EVACUATIONS:

Listen to local official for recommended preparedness actions.

Assess the risk from wind, falling trees, and flooding at your
location. If you decide to move, relocate to a safer location
nearby.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to stay inside and away from windows. Listen for
updates and be ready in case you lose electrical power. Keep a
battery-powered radio, charged cell phone and flashlight handy.

Keep your cell phone charged and in power-saving mode. If you lose
power, use it sparingly and mainly for personal emergencies and
check-ins.

Quickly move to the safest place within your shelter if it begins to
fail, preferably an interior room on the lowest floor as long as
flooding is not a concern.

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 Houston/Galveston TX around 10 AM CDT, or sooner if
conditions warrant.

$$
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