[Tropical] Hurricane Local Statement

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Hurricane Harvey Local Statement Intermediate Advisory Number 23A
National Weather Service Houston/Galveston TX  AL092017
114 AM CDT Sat Aug 26 2017

This product covers Southeast Texas

**HARVEY MAKES A SECOND LANDFALL ON THE NORTHEASTERN SHORE OF COPANO
BAY**


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

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning and Storm Surge Watch are in effect
      for Chambers and Harris
    - A Tropical Storm Warning is in effect for Austin, Colorado,
      Fort Bend, Liberty, Waller, and Wharton
    - A Storm Surge Warning and Hurricane Warning are in effect for
      Jackson and Matagorda
    - A Storm Surge Warning and Tropical Storm Warning are in effect
      for Brazoria and Galveston

* STORM INFORMATION:
    - About 150 miles west-southwest of Galveston TX or about 70
      miles west-southwest of Matagorda TX
    - 28.2N 97.0W
    - Storm Intensity 125 mph
    - Movement Northwest or 325 degrees at 6 mph

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

Major Hurricane Harvey has weakened to a category 3 hurricane and has
made a second landfall along the northeastern shore of Copano Bay. The
primary impact from Harvey over Southeast Texas remains prolonged
significant heavy rainfall that will induce extreme widespread flooding
through at least the beginning of next week. Tropical storm force
winds, with occasional hurricane force wind gusts are possible through
around noon Saturday for the southwestern portions of Southeast Texas.
With the strongest winds tonight, storm surge will peak overnight and
be slow to recede through Sunday, but elevated tide levels will
continue through Tuesday. Tornadoes will continue to form overnight
tonight, especially across the coastal counties. Again, the primary
emphasis and greatest threat to life and property will be the extreme
rainfall amounts that will likely lead to a potentially catastrophic
and prolonged flash flooding event over the coming 3 to 5 days.

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

* FLOODING RAIN:
Potential impacts from the flooding rain will be unfolding across
Southeast Texas. Remain well guarded against life-threatening flood
waters having potential devastating impacts. If realized, these 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.


* WIND:
Potential impacts from the main wind event are now unfolding across
the Matagorda Bay area. Remain well sheltered from life-threatening
wind having additional devastating impacts. If realized, these impacts
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.

Potential impacts from the main wind event are also now unfolding
across the southwestern portion of Southeast Texas. Remain well
sheltered from life-threatening wind having possible limited to
extensive impacts.

* SURGE:
Potential impacts from the main surge event are now unfolding across
the Upper Texas Coast, primarily west of Freeport. Remain well away
from life-threatening surge having possible devastating impacts. If
realized, these impacts 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.

Potential impacts from the main surge event are also now unfolding
across the Upper Texas Coast east of Freeport. Remain well away from
life-threatening surge having possible significant impacts.

Potential impacts from the main surge event are also now unfolding
across northern Galveston and Trinity Bay. Remain well away from locally
hazardous surge having possible limited impacts.

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

* TORNADOES:
Potential impacts from tornadoes are still unfolding across Southeast
Texas, especially across the coastal counties. Remain well braced
against a tornado event having additional 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 return to evacuated areas until hazardous winds diminish and
flood waters abate.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to remain safely sheltered from the storm. Stay
inside and away from windows. Listen for updates and be ready in case
you lose electrical power. Locate your battery powered radio and
flashlight from your Emergency Supplies Kit. Keep these items close.

During the peak of the storm, keep your shoes on and rain gear handy.
Boots and tennis shoes offer the best foot protection if you become
unexpectedly exposed to the elements.

Continue to keep your cell phone well charged for as long as
possible. If you lose power, use it more sparingly and mainly for
personal emergencies and check-ins. Do not overload communications
systems with idle chatter.

Do not venture outside while in the eye of a hurricane. Within the
eye, weather conditions may temporarily improve which can be
misleading. Once the eye passes, the wind will change direction and
return to dangerous speeds. Heavy rain will also return. Be smart and
remain safely hidden from the storm.

Do not be a thrill seeker or risk your life for senseless photos or
videos. Be wise and avoid becoming another statistic.

Be ready to move to the identified safe room if your home or shelter
begins to fail. Quickly move to an interior room on the lowest floor.
Put as many sturdy walls between you and the storm as you can.
Protect your head and body.

When major hurricanes make landfall, extreme winds bring a tremendous
threat to life and cause devastating to catastrophic damage. During
landfall, listen for extreme wind warnings which indicate the exact
timing and location of these incredible life-threatening winds. If
issued for you area, move to the safest place within your home or
shelter. Take the same life-saving actions as if it were a violent
tornado.


* 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 430 AM CDT, or sooner if
conditions warrant.

$$
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