[Tropical] Hurricane Local Statement

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Tropical Storm Hanna Local Statement Advisory Number 7
National Weather Service Brownsville TX  AL082020
1043 AM CDT Fri Jul 24 2020

This product covers The Rio Grande Valley and Deep South Texas

**HEAVY RAINFALL AND DANGEROUS FLASH FLOODING EXPECTED THIS WEEKEND**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

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

* STORM INFORMATION:
    - About 260 miles east-northeast of South Padre Island TX or
      about 260 miles east of the Mouth of Baffin Bay
    - 27.2N 93.2W
    - Storm Intensity 45 mph
    - Movement West-northwest or 285 degrees at 9 mph

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

Tropical Storm Hanna has shown only slight strengthening overnight but
remains a well organized tropical cyclone with convection increasing on
the south and east side of center. Hanna is expected to gradually
strengthen through landfall late afternoon or early evening Saturday
continuing on a westerly track towards the Lower Texas coast near the
Kleberg Kenedy county line or Baffin Bay. After making landfall, Hanna
is anticipated to turn west-southwestward across Deep South Texas
before crossing the Rio Grande River and into northern Mexico while
gradually weakening with time.

A Flash Flood watch has been issued for all of Deep South Texas and
the Rio Grande Valley for the threat of heavy rainfall producing
potentially dangerous flash flooding. Rainfall amounts of 4 to 8
inches, locally 12+ inches can be expected.

Additionally, tropical storm winds are expected, especially near where
the center of circulation passes. Elsewhere, squalls will produce the
potential for wind gusts in excess of tropical storm force. Coastal
flooding is also expected concern with 2 feet of inundation possible
on either side of Padre Island including near the city of South Padre
Island.

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

* FLOODING RAIN:
Prepare for life-threatening rainfall flooding having possible
extensive impacts across portions of Kenedy, northern Hidalgo, Brooks
and Willacy Counties.

. Potential impacts include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Rivers and tributaries may rapidly overflow their banks in
      multiple places. Small streams, creeks, canals, arroyos, and
      ditches may become dangerous rivers. In mountain areas,
      destructive runoff may run quickly down valleys while
      increasing susceptibility to rockslides and mudslides. Flood
      control systems and barriers may become stressed.
    - Flood waters can enter many structures within multiple
      communities, some structures becoming uninhabitable or washed
      away. Many places where flood waters may cover escape routes.
      Streets and parking lots become rivers of moving water with
      underpasses submerged. Driving conditions become dangerous.
      Many road and bridge closures with some weakened or washed out.

Prepare for dangerous rainfall flooding having possible significant
impacts across most of Deep South Texas and the Rio Grande Valley.

* WIND:
Prepare for dangerous wind having possible significant impacts across
the northern ranchlands.

 Potential impacts in this area 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.

Also, prepare for hazardous wind having possible limited impacts
across the remainder of Deep South Texas.

* TORNADOES:
Prepare for 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.

* SURGE:
Prepare for locally hazardous surge having possible limited impacts
across the Lower Texas coast including the west side of the Laguna
Madre this includes the city of South Padre Island.

. 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.

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

* EVACUATIONS:

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.

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!

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 430 PM CDT, or sooner if conditions
warrant.

$$
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