[Tropical] Hurricane Local Statement

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Hurricane Hanna Local Statement Advisory Number 11
National Weather Service Brownsville TX  AL082020
1059 AM CDT Sat Jul 25 2020

This product covers The Rio Grande Valley and Deep South Texas

**HURRICANE HANNA NEARING THE LOWER TEXAS COAST**
**DANGEROUS TO CATASTROPHIC FLASH FLOODING EXPECTED**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

* 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 90 miles northeast of South Padre Island TX or about 80
      miles east-northeast of Port Mansfield TX
    - 27.1N 96.3W
    - Storm Intensity 80 mph
    - Movement West or 270 degrees at 7 mph

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

The center of Hurricane Hanna is poised 30 to 40 miles east of Baffin
Bay, northeast Kenedy County or 75 miles northeast of Port Mansfield.
Hanna has strengthen to a Category one hurricane at 80 mph with higher
gusts. Hanna will be making landfall this afternoon in Kenedy County
moving west to southwest crossing all of Deep South Texas tonight and
Sunday. Rain bands are beginning to move south along the coast with
heavy rainfall and flooding imminent for Deep South Texas and the Rio
Grande Valley. Primary threat will be the 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:
Prepare for 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 winds having possible extensive
impacts across Kenedy County and the Northern 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, prepare for dangerous wind having possible significant impacts
across the rest of Deep South Texas.

* SURGE:
Prepare for locally hazardous surge having possible limited impacts
across the Lower Texas coast from South Padre Island to north of Port
Mansfield.

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:

When making safety and preparedness decisions, do not focus on the
exact forecast track since hazards such as flooding rain, damaging
wind gusts, storm surge, and tornadoes extend well away from the
center of the storm.

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, plan to move to safe shelter.

If you live in a place particularly vulnerable to flooding, such as
near the ocean or a large inland lake, in a low-lying or poor
drainage area, in a valley, or near an already swollen river, plan to
move to safe shelter on higher ground.

Always heed the advice of local officials and comply with orders that
are issued. Do not needlessly jeopardize your life or the lives of
others.

When securing your property, outside preparations should be concluded
as soon as possible before conditions deteriorate. The onset of
strong gusty winds or flooding can cause certain preparedness
activities to become unsafe.

Be sure to let friends and family members know of your intentions for
weathering the storm and your whereabouts. Have someone located away
from the threatened area serve as your point of contact. Share vital
contact information with others. Keep cell phones handy and charged.

Closely monitor weather.gov, NOAA Weather Radio and local news outlets
for official storm information. Listen for possible changes to the
forecast.

There is a threat from tornadoes with this storm. Have multiple ways
to receive Tornado Warnings. Be ready to shelter quickly.


* 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 430 PM CDT, or sooner if conditions
warrant.

$$
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