[Tropical] Hurricane Local Statement

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Tropical Storm Isaias Local Statement Advisory Number 21
National Weather Service Miami FL  AL092020
521 AM EDT Sun Aug 2 2020

This product covers South Florida

**TROPICAL STORM ISAIAS APPROACHING SOUTH FLORIDA WITH STRONG WINDS
AND HEAVY RAINFALL**

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

* CHANGES TO WATCHES AND WARNINGS:
    - The Tropical Storm Warning has been cancelled for Coastal
      Miami-Dade, Inland Broward, Metro Broward, and Metro Miami-Dade
    - The Hurricane Warning has been cancelled and a Tropical Storm
      Warning has been issued for Coastal Palm Beach and Metro Palm
      Beach

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

* STORM INFORMATION:
    - About 40 miles southeast of West Palm Beach FL or about 60
      miles northeast of Miami FL
    - 26.3N 79.5W
    - Storm Intensity 65 mph
    - Movement Northwest or 325 degrees at 9 mph

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

Tropical Storm Isaias is forecast to continue slowly drifting
northwestward toward South Florida this morning, before taking a more
northward track later today. This system is no longer expected to
reach hurricane status over the South Florida waters, and is expected
to have moved north of these waters by late this afternoon.

The overall magnitude and coverage of forecasted strong winds has
decreased to some extent across South Florida. Hurricane-force winds
are no longer expected, and the area with a threat of tropical-storm-
force winds has become confined to Coastal Broward County to Palm Beach
County and Lake Okeechobee.

Tropical-storm-force winds are expected to continue overspreading
portions of Coastal Broward County toward Palm Beach County and Lake
Okeechobee through the morning hours, as the center of Isaias makes its
closest approach to the coast. These winds will persist into this
afternoon before diminishing. Rainbands accompanying Isaias will also
have the potential to enhance tropical-storm-force winds in occasional
squalls through the day. In addition, the potential for repeated
rounds of heavy rainfall accompanying this activity could result in
localized flooding in urban and poor-drainage areas across southeast
Florida.

The bulk of persistent strong winds and occasional squalls should have
a tendency of shifting northward through the day. However, present
indications are that additional isolated to scattered shower and
thunderstorm activity trailing south of Isaias could re-develop across
parts of South Florida. If this were to occur in areas that experience
sunshine, following the passage of denser cloud coverage accompanying
Isaias, then locally strong wind gusts and localized flooding could
affect parts of South Florida. This includes areas south of ongoing
tropical highlights, where strong winds would be possible in afternoon
shower and thunderstorm activity on a very localized basis.

In addition, high surf, beach erosion, and dangerous rip currents are
expected. Minor coastal flooding will be possible in Palm Beach
County, where exposure to the strong onshore winds will be maximized
in duration and strength.

Hazardous marine conditions will continue through much of today across
the South Florida Atlantic waters. Winds should subside with improving
marine conditions tonight.

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

* WIND:
Potential impacts from the main wind event are now unfolding across
portions of Palm Beach County. Remain well sheltered from dangerous
wind having possible 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.

Potential impacts from the main wind event are also expected to develop
across Coastal Broward County and toward Lake Okeechobee. Remain well
sheltered from hazardous wind having possible limited impacts.

* FLOODING RAIN:
Potential impacts from the flooding rain are still unfolding across
portions of southeast Florida. Remain well guarded against locally
hazardous flood waters having possible limited impacts. If realized,
these 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.

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

* EVACUATIONS:
Do not enter evacuated areas until officials have given the all clear
to return.

* OTHER PREPAREDNESS INFORMATION:
Keep your cell phone charged and in power-saving mode. If you lose
power, use it sparingly and mainly for personal emergencies and
check-ins.

Do not be a thrill seeker or risk your life for senseless photos or
videos.

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

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 Noon EDT, or sooner if conditions warrant.

$$

Cohen/Santos
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