[Tropical] Hurricane Local Statement

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WTUS86 KLOX 191047
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Hurricane Hilary Local Statement Advisory Number 12
National Weather Service Los Angeles/Oxnard CA  EP092023
347 AM PDT Sat Aug 19 2023

This product covers Southwest California

**TROPICAL STORM WARNING FOR ALL OF LOS ANGELES COUNTY...AS WELL AS
THE MOUNTAINS...VALLEYS...AND FOOTHILLS OF VENTURA COUNTY**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning is in effect for all of Los Angeles
      County, as well as the mountains, valleys, and foothills of
      Ventura County.

* STORM INFORMATION:
    - About 910 miles south-southeast of Avalon CA or about 950 miles
      south-southeast of Los Angeles Airport CA
    - 20.9N 113.3W
    - Storm Intensity 130 mph
    - Movement North-northwest or 335 degrees at 13 mph

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

Hurricane Hilary will weaken to a tropical storm as it approaches
Southern California later this weekend. The risk for flash flooding
continues to increase across the whole region, with rare and dangerous
flooding possible across the mountains and deserts. Strong, tropical-
storm-force winds are expected Sunday into Monday, especially over the
mountains, valleys, and foothills of Los Angeles and Ventura County.


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

* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
devastating impacts across the eastern San Gabriel Mountains and
adjacent foothills of the Antelope Valley. Potential impacts include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Small streams, creeks, canals, arroyos, and normally dry washes
      may become dangerous rivers. Destructive runoff may rage down
      mountain valleys while increasing susceptibility to rockslides,
      mudslides, and debris flows. Flood control systems and barriers
      may become stressed.
    - 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.

Protect against life-threatening rainfall flooding having possible
extensive impacts across across the remainder of Los Angeles and
Ventura Counties, and possibly in eastern Santa Barbara County. The
most significant flooding is expected over the mountains, foothills,
valleys, and urban areas.

* WIND:
Prepare for hazardous wind having possible significant impacts across
Los Angeles and Ventura Counties, with greatest impacts over Catalina
Island and Santa Barbara Island, as well as the mountains, valleys, and
foothills of Los Angeles and Ventura Counties. Some of the strongest
winds will impact areas that are normally susceptible to strong
northeast winds. Potential impacts in this area include:
    - Damage to porches, awnings, carports, sheds, and unanchored
      mobile homes. Unsecured lightweight objects blown about.
    - Many large tree limbs broken off. A few trees uprooted, but with
      greater numbers in places where trees are shallow rooted. Some
      fences and roadway signs blown over.
    - A few roads impassable from debris, particularly within urban
      or heavily wooded places. Hazardous driving conditions on
      bridges and other elevated roadways.
    - Scattered power and communications outages.

* SURGE:
Little to no impacts are anticipated at this time across Southwest
California. However, coastal flooding is possible especially
around Catalina Island and Long Beach.

* TORNADOES:
Little to no impacts are anticipated at this time across Los Angeles,
Ventura, Santa Barbara, or San Luis Obispo Counties in Southern
California.

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

* EVACUATIONS:
Listen to local official for recommended preparedness actions,
including possible evacuation. If ordered to evacuate, do so
immediately.

* 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 heading to a community shelter, become familiar with the shelter
rules before arrival, especially if you have special needs or have
pets. Take essential items with you from your Emergency Supplies Kit.

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.

If you are a visitor, be sure to know the name of the city or town in
which you are staying and the name of the county in which it resides.
Listen for these locations in local news updates. Pay attention for
instructions from local authorities.

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 Los Angeles/Oxnard CA around 11 AM PDT, or sooner if
conditions warrant.

$$

BRUNO/HALL/RORKE
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