[Tropical] Hurricane Local Statement

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Tropical Storm Hanna Local Statement Advisory Number 10
National Weather Service Brownsville TX  AL082020
407 AM CDT Sat Jul 25 2020

This product covers The Rio Grande Valley and Deep South Texas

**HANNA CLOSE TO HURRICANE STRENGTH**
**DANGEROUS TO CATASTROPHIC FLASH FLOODING EXPECTED**

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

* CHANGES TO WATCHES AND WARNINGS:
    - A Storm Surge Warning has been issued for Coastal Kenedy
    - The Tropical Storm Warning has been upgraded to a Hurricane
      Warning for Coastal Willacy and Inland Willacy

* CURRENT WATCHES AND WARNINGS:
    - A Storm Surge Warning and Hurricane Warning are in effect for
      Coastal Kenedy
    - A Hurricane Warning is in effect for Brooks, Coastal Willacy,
      Inland Kenedy, and Inland Willacy
    - A Tropical Storm Warning is in effect for Coastal Cameron,
      Inland Cameron, Jim Hogg, Northern Hidalgo, Southern Hidalgo,
      Starr, and Zapata

* STORM INFORMATION:
    - About 110 miles northeast of South Padre Island TX or about 100
      miles east-northeast of Port Mansfield TX
    - 27.0N 95.8W
    - Storm Intensity 70 mph
    - Movement West or 265 degrees at 9 mph

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

Tropical Storm Hanna continues to show increased organization with
very cold cloud convective tops. Anticipate further strengthening to a
hurricane until landfall during Saturday afternoon or early evening
along the lower Texas coast. Hanna is expected to continue on a
southwesterly motion across Deep South Texas into Sunday morning
before crossing the Rio Grande River. Primary threat will be very
heavy rainfall with dangerous to catastrophic flash flooding. Total
rainfall accumulations through Monday morning of 6 to 12 inches are
expected with locally 18+ inches possible. Hurricane force winds will
be possible near the center of circulation as Hanna primarily moves
across portions of the northern ranchlands. For the rest of Deep South
Texas, tropical storm force winds will be expected with gusts up to
near hurricane force. Scattered to numerous power outages will be
possible. Storm surge inundation of 2 to 4 feet is expected along the
Kenedy county coastline while 1 to 3 feet of inundation is expected
further to the south on either side of South Padre Island.
Additionally, conditions are favorable for the threat of isolated
tornadoes across the majority of the region through Saturday night.

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

* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
devastating impacts across the lower to mid Rio Grande Valley.
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, arroyos, and ditches may become raging rivers. In
      mountain areas, deadly runoff may rage down valleys while
      increasing susceptibility to rockslides and mudslides. 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 rest of the Rio Grande Valley and Deep
South Texas.

* WIND:
Protect against life-threatening wind having possible extensive impacts
across the northeast ranchlands. Potential impacts in this area
include:
    - Considerable roof damage to sturdy buildings, with some having
      window, door, and garage door failures leading to structural
      damage. Mobile homes severely damaged, with some destroyed.
      Damage accentuated by airborne projectiles. Locations may be
      uninhabitable for weeks.
    - Many large trees snapped or uprooted along with fences and
      roadway signs blown over.
    - Some roads impassable from large debris, and more within urban
      or heavily wooded places. Several bridges, causeways, and
      access routes impassable.
    - Large areas with power and communications outages.

Also, protect against dangerous wind having possible significant
impacts across the rest of Deep South Texas.

* SURGE:
Protect against locally hazardous surge having possible limited impacts
across the lower Texas coast. Potential impacts in this area 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 The Rio Grande Valley and Deep South Texas, little
to no impact is anticipated.

* TORNADOES:
Protect against a tornado event having possible limited impacts
across The Rio Grande Valley and Deep South Texas. 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:
Listen to local official for recommended preparedness actions,
including possible evacuation. If ordered to evacuate, do so
immediately.

For those not under evacuation orders, assess the risk from wind,
falling trees, and flooding at your location. If you decide to move,
relocate to a safer location nearby. If you do not relocate, help keep
roadways open for those under evacuation orders.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to complete all preparations to protect life and
property in accordance with your emergency plan. Ensure you are in a
safe location before the onset of strong winds or possible flooding.

If you are relocating to safe shelter, leave as early as possible.
Allow extra time to reach your destination. Many roads and bridges
will be closed once strong winds arrive. Check the latest weather
forecast before departing and drive with caution.

Failure to adequately shelter may result in serious injury or loss of
life. Always heed the advice of local officials and comply with any
orders that are issued. Remember, during the storm 9 1 1 Emergency
Services may not be able to immediately respond if conditions are
unsafe. This should be a big factor in your decision making.

It is important to remain calm, informed, and focused during an
emergency. Be patient and helpful with those you encounter.

Rapidly rising flood waters are deadly. If you are in a flood-prone
area, consider moving to higher ground. Never drive through a flooded
roadway. Remember, turn around don't drown!

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 Brownsville TX around 10 AM CDT, or sooner if conditions
warrant.

$$
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