[Tropical] Hurricane Local Statement

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Tropical Storm Isaias Local Statement Advisory Number 11
National Weather Service Miami FL  AL092020
1103 PM EDT Thu Jul 30 2020

This product covers South Florida

**Tropical Storm Watch Remains In Effect For Portions of Southeast
Florida Ahead of Isaias**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Watch is in effect for Coastal Broward,
      Coastal Miami-Dade, Coastal Palm Beach, Inland Broward, Inland
      Palm Beach, Metro Broward, Metro Miami-Dade, and Metro Palm
      Beach

* STORM INFORMATION:
    - About 670 miles southeast of West Palm Beach FL or about 640
      miles east-southeast of Miami FL
    - 20.5N 71.9W
    - Storm Intensity 60 mph
    - Movement Northwest or 305 degrees at 18 mph

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

Tropical Storm Isaias is forecast to move across the northwest
Bahamas as a category 1 hurricane on Saturday. Based on the latest
forecast from the National Hurricane Center, tropical storm force
winds could reach as far west as the Atlantic coast of Palm Beach
County and very close to coastal Broward County. Forecast uncertainty
remains high at this time with Isaias and any notable change in the
forecast could bring stronger winds further inland into Palm Beach and
Broward Counties and south into portions of coastal and metro
Miami-Dade County. A tropical storm watch continues to be in effect
for most of southeast Florida.

A reasonable worst case scenario at this time is for portions of
southeastern Florida to be potentially impacted by high end tropical
storm force winds (winds greater than 58 mph). Although concerns for
hurricane conditions to impact portions of southeast Florida cannot be
ruled out, the chances of sustained hurricane force winds remain
remote at this time. It is important to continue to monitor forecast
trends with future advisories.

Tropical storm force winds could start impacting portions of southeast
Florida as early as the late Friday night/early Saturday but
conditions are most likely to occur sometime during the day and
evening hours on Saturday.

Other concerns with this system will be potential for locally heavy
rainfall, particularly across eastern portions of South Florida where
there is a slight risk of excessive rainfall. High surf along with
minor coastal flooding are likely as the storm passes near or just
east of the coast. A stronger system and/or a track closer to the
coast could increase the threat of coastal flooding, so again it is
important to keep monitoring future forecasts. Marine conditions will
deteriorate late Friday night as the system approaches the region from
east to west across the local Atlantic waters with increasing winds
and building seas. Marine conditions are not likely to improve until
Sunday.

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

* WIND:
Prepare for dangerous wind having possible significant impacts across
eastern portions of Palm Beach and Broward Counties. 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 inland portions of Palm Beach and Broward Counties along with
Miami-Dade County.

Elsewhere across South Florida, little to no impact is anticipated.

* FLOODING RAIN:
Prepare for locally hazardous rainfall flooding having possible limited
impacts across the Southeast Florida metropolitan areas. Potential
impacts include:
    - Localized rainfall flooding may prompt a few evacuations.
    - Ditches and canals may quickly rise with swift currents.
    - Flood waters can enter a few structures, especially in usually
      vulnerable spots. A few places where rapid ponding of water
      occurs at underpasses, low-lying spots, and poor drainage
      areas. Several storm drains and retention ponds become
      near-full and begin to overflow. Some brief road and bridge
      closures.

Elsewhere across South Florida, little to no impact is anticipated.

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

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

* OTHER PREPAREDNESS INFORMATION:
Now is the time to check your emergency plan and emergency supplies
kit and take necessary actions to protect your family and secure your
home or business.

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 you are a visitor, know the name of the county in which you are
located and where it is relative to current watches and warnings. If
staying at a hotel, ask the management staff about their on-site
disaster plan. Listen for evacuation orders, especially pertaining to
area visitors.

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

* 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 Miami FL around 5 AM EDT, or sooner if conditions warrant.

$$

RAG
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