[Tropical] Hurricane Local Statement

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WTUS84 KBRO 260616
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Tropical Storm Hanna Local Statement Intermediate Advisory Number 13A
National Weather Service Brownsville TX  AL082020
116 AM CDT Sun Jul 26 2020

This product covers The Rio Grande Valley and Deep South Texas

**HANNA WEAKENS TO A TROPICAL STORM OVER SOUTHERN TEXAS**
**DANGEROUS TO CATASTROPHIC FLASH FLOODING CONTINUES**

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

* CHANGES TO WATCHES AND WARNINGS:
    - A Hurricane Warning has been replaced by a Tropical Storm Warning
      for Brooks, Kenedy, and Willacy counties.

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

* STORM INFORMATION:
    - About 90 miles west-northwest of South Padre Island TX or about
      70 miles west of Port Mansfield TX
    - 26.5N 98.5W
    - Storm Intensity 70 mph
    - Movement West-southwest or 250 degrees at 9 mph

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

Tropical Storm Hanna is on a general west-southwest motion across Deep
South Texas with maximum sustained winds of 70 mph. This motion will
be expected to continue through today with Hanna moving across the Rio
Grande River later this morning. Hanna will continue to weaken
becoming a tropical depression later today. The greatest threats
continue to be the heavy rainfall and potential catastrophic flash
flooding. Total rainfall amounts through Monday morning of 6 to
12 inches with locally 18+ inches will be expected. Tropical storm
force winds will continue, especially within the remnant eyewall and
squalls. 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 additional 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 additional extensive impacts.

* WIND:
Potential impacts from the main wind event are now unfolding across The
Rio Grande Valley and Deep South Texas. Remain well sheltered from
dangerous wind having additional significant impacts. If realized,
these impacts include:
    - Some damage to roofing and siding materials, along with damage
      to porches, awnings, carports, and sheds. A few buildings
      experiencing window, door, and garage door failures. Mobile
      homes damaged, especially if unanchored. Unsecured lightweight
      objects become dangerous projectiles.
    - Several large trees snapped or uprooted, but with greater
      numbers in places where trees are shallow rooted. Several
      fences and roadway signs blown over.
    - Some roads impassable from large debris, and more within urban
      or heavily wooded places. A few bridges, causeways, and access
      routes impassable.
    - Scattered power and communications outages, but more prevalent
      in areas with above ground lines.

* SURGE:
Potential impacts from the main surge event are now unfolding across
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 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 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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