[Tropical] Hurricane Local Statement

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Tropical Storm Isaias Local Statement Advisory Number 20
National Weather Service Miami FL  AL092020
1112 PM EDT Sat Aug 1 2020

This product covers South Florida

**ISAIAS CONTINUES TO SLOWLY APPROACH THE SOUTHEAST FLORIDA COAST**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

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

* STORM INFORMATION:
    - About 100 miles southeast of West Palm Beach FL or about 70
      miles east-southeast of Miami FL
    - 25.5N 79.1W
    - Storm Intensity 70 mph
    - Movement Northwest or 310 degrees at 9 mph

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

Tropical Storm Isaias is forecast to slowly advance from the vicinity
of the Bahamas toward South Florida through the overnight hours
tonight. Isaias's motion is then forecast to turn more northward on
Sunday, with the center of this system presently forecast to remain
over the vicinity of the Gulf Stream waters just off the coast. Isaias
is expected to have re-intensified to a hurricane by early Sunday
morning.

Squalls accompanying Isaias will continue to overspread southeast
Florida toward the Lake Okeechobee region tonight, as rainbands ahead
of Isaias move ashore. In association with this activity, tropical-
storm-force winds are expected to increase in frequency from parts of
coastal and metro Miami-Dade County, through Broward and Palm Beach
Counties, and toward Lake Okeechobee -- through the overnight hours
tonight. Hurricane-force winds are forecast to materialize across
coastal and metro Palm Beach County during the pre-dawn hours of
Sunday, as the center of Isaias makes its closest approach to the
coast.

The tropical-storm and hurricane-force winds are forecast to continue
into Sunday morning, and then gradually taper off from south to north
later in the day -- lingering the latest in the day across Palm Beach
County.

Additionally, areas of heavy rainfall will be possible through Sunday,
particularly across eastern portions of South Florida and around Lake
Okeechobee. Localized flooding will be possible where repeated rounds
of heavy rain occur, especially in urban and poor-drainage areas.

While unlikely, a brief tornado cannot be ruled out in the vicinity of
coastal Palm Beach County.

High surf, dangerous rip currents, minor coastal flooding, and beach
erosion are expected, with the greatest impacts along the Palm Beach
coast where exposure to the strong onshore winds will be maximized.

Dangerous marine conditions will continue through most of Sunday,
before beginning to slowly improve Sunday night.

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

* WIND:
Protect against life-threatening wind having possible extensive impacts
across portions of coastal and metro Palm Beach County. Potential
impacts in this area 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.

Also, protect against dangerous wind having possible limited to
significant impacts across portions of southeast Florida from coastal
Miami-Dade County northward through Broward County and farther
northwest toward the Lake Okeechobee region.

* SURGE:
Protect against locally hazardous surge having possible limited impacts
across coastal southeast Florida. 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.

* FLOODING RAIN:
Protect against locally hazardous rainfall flooding having possible
limited impacts across coastal and metro South Florida. 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.

* TORNADOES:
Protect against a tornado event having possible limited impacts across
coastal and metro Palm Beach County. 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, 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.

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. If ordered to evacuate, do so
immediately.

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:
If you are relocating to safe shelter, leave as early as possible.
Allow extra time to reach your destination. Many roads and bridges will
be closed once strong winds arrive. Check the latest weather forecast
before departing and drive with caution.

It is important to remain calm, informed, and focused during an
emergency. Be patient and helpful with those you encounter.

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 or parish in which
it resides. Listen for these locations in local news updates. Pay
attention for instructions from local authorities.

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 Miami FL around 6 AM EDT, or sooner if conditions warrant.

$$

Cohen
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