[Tropical] Hurricane Local Statement

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Tropical Storm Harvey Local Statement Advisory Number 27
National Weather Service Houston/Galveston TX  AL092017
1030 PM CDT Sat Aug 26 2017

This product covers Southeast Texas

**HARVEY WEAKENING AS IT DRIFTS OVER SOUTHEASTERN TEXAS**

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

* CHANGES TO WATCHES AND WARNINGS:
    - The Tropical Storm Warning and Storm Surge Watch have been
      cancelled for Chambers and Harris
    - The Tropical Storm Warning has been cancelled for Austin,
      Colorado, Fort Bend, Liberty, Waller, and Wharton
    - The Storm Surge Warning and Tropical Storm Warning have been
      cancelled for Brazoria and Galveston

* CURRENT WATCHES AND WARNINGS:
    - A Storm Surge Warning and Tropical Storm Warning are in effect
      for Jackson and Matagorda

* STORM INFORMATION:
    - About 150 miles west of Galveston TX or about 90 miles
      west-northwest of Matagorda TX
    - 29.3N 97.3W
    - Storm Intensity 50 mph
    - Movement East-northeast or 60 degrees at 1 mph

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

Tropical Storm Harvey is barely moving and still producing bands of
very heavy rainfall with some embedded tornadoes tonight. Prolonged
extreme heavy rainfall and widespread flash flooding is the primary
threat to Southeast Texas. Numerous flash flood warnings have already
been issued across the area, and widespread flooding is likely to
continue over the next 3 to 5 days. Tornadoes have also been occurring
across Southeast Texas over the last day or so and will likely continue
through the next several days. Coastal flooding may be an ongoing
issue along the coast where winds will continue to push water onshore,
particularly south of Sargent. Elevated tides will cause the recession
of coastal flood waters to be slow, likely lasting into the first part
of the week. Wind gusts to tropical storm force are still ongoing,
primarily in the southwestern portions of the area towards Matagorda
Bay. Though there are currently multiple hazards present across the
area, the greatest threat to life and property remains the potential
for extreme rainfall and subsequent prolonged and potentially
catastrophic flash flooding well into next week.

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

* FLOODING RAIN:
Potential impacts from the flooding rain are still unfolding across
Southeast Texas. Remain well guarded against life-threatening flood
waters having additional catastrophic 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.

* TORNADOES:
Potential impacts from tornadoes are still unfolding across Southeast
Texas. 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.

* WIND:
Potential impacts from the main wind event are now unfolding across
the 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.

* SURGE:
Potential impacts from the main surge event are now unfolding across
the Upper Texas Coast, primarily west of Sargent. 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.

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

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

* EVACUATIONS:

IMMINENT/ONGOING PHASE - 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 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.

* 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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