[Tropical] Hurricane Local Statement

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Hurricane Hanna Local Statement Advisory Number 13
National Weather Service Brownsville TX  AL082020
957 PM CDT Sat Jul 25 2020

This product covers The Rio Grande Valley and Deep South Texas

**HANNA CONTINUES TO MOVE INLAND OVER SOUTHERN TEXAS**
**DANGEROUS TO CATASTROPHIC FLASH FLOODING CONTINUES**

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 60 miles northwest of Brownsville TX or about 40 miles
      west of Port Mansfield TX
    - 26.6N 98.0W
    - Storm Intensity 75 mph
    - Movement West-southwest or 250 degrees at 9 mph

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

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

The center of Hurricane Hanna continues to progress on a general
west-southwesterly motion across Deep South Texas with maximum
sustained winds of 75 mph. This motion will be expected to continue
into Sunday with Hanna moving across the Rio Grande River during
Sunday morning. Hanna will generally weaken to a tropical storm then
eventually to a tropical depression over the next 24 to 36 hours. The
greatest concern remains the heavy rainfall and potential catastophic
flash flooding. Total rainfall amounts through Monday morning of 6 to
12 inches with locally 18+ inches are expected. A pocket of hurricane
force winds will remain possible within the eyewall, otherwise
tropical storm force winds are expected with some gusts within squalls
approaching hurricane force. The strong and gusty winds will bring
about scattered to numerous power outages. Storm surge inundation of
2 to 4 feet will remain possible along the Kenedy county coastline
while 1 to 3 feet of inundation is still possible further to the south
on either side of South Padre Island. Additionally, conditions become
slightly more favorable for the threat of isolated tornadoes on the
southern and eastern side of Hanna.

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

* FLOODING RAIN:
Potential impacts from the flooding rain are still unfolding across
eastern portions of Deep South Texas. Remain well guarded against life-
threatening flood waters having possible 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, 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.

Potential impacts from the flooding rain are still unfolding across
the rest of deep south Texas. Remain well guarded against life-
threatening flood waters having possible extensive impacts.

* WIND:
Potential impacts from the main wind event are now unfolding across
coastal sections of Willacy county extending inland. Remain well
sheltered from life-threatening wind having additional extensive
impacts. If realized, these impacts 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.

Potential impacts from the main wind event are also now unfolding
across the rest of Deep South Texas. Remain well sheltered from
dangerous wind having additional significant impacts.

* SURGE:
Potential impacts from the main surge event are now unfolding across
along the Kenedy county coastline. Remain well away from locally
hazardous surge having additional 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 The Rio Grande Valley and Deep South Texas, little
to no impact is anticipated.

* TORNADOES:
Potential impacts from tornadoes are still unfolding across The Rio
Grande Valley and Deep South Texas. Remain well braced against a
tornado event having possible 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 enter evacuated areas until officials have given the all clear
to return.

* 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.

During the peak of the storm be ready to move quickly. Keep your
shoes on and rain gear handy. Boots and athletic shoes offer the best
foot protection if you become unexpectedly exposed to the weather.

Do not venture outside while in the eye of a hurricane as any
improvement in weather will only be temporary. Once the eye passes,
conditions will become life threatening as winds immediately return
to dangerous speeds, so remain safely sheltered from the storm.

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 you are prone to flooding or in an area under a storm surge watch
or warning, be prepared for the possibility of a quick and dramatic
rise in water levels.

* 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 4 AM CDT, or sooner if conditions
warrant.

$$
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