[Tropical] Hurricane Local Statement

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

This product covers East Central Florida

**INCREASING WINDS AND SQUALLS WILL OVERSPREAD THE TREASURE COAST
  REGION THIS MORNING**


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

* CHANGES TO WATCHES AND WARNINGS:
    - The Hurricane Warning has been cancelled and a Tropical Storm
      Warning has been issued for Coastal Volusia, Indian River,
      Martin, Northern Brevard, Southern Brevard, and St. Lucie

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning and Storm Surge Watch are in effect
      for Coastal Volusia, Indian River, Martin, Northern Brevard,
      Southern Brevard, and St. Lucie
    - A Tropical Storm Warning is in effect for Inland Volusia,
      Okeechobee, Orange, Osceola, and Seminole

* STORM INFORMATION:
    - About 160 miles south-southeast of Cape Canaveral FL or about
      80 miles southeast of Stuart FL
    - 26.3N 79.5W
    - Storm Intensity 65 mph
    - Movement Northwest or 325 degrees at 9 mph

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

The Hurricane Warning for the coastal counties of east central Florida
has been changed to a Tropical Storm Warning. A Tropical Storm Warning
is now in effect for all of east central Florida with the exception of
Lake County.

Tropical Storm Isaias, currently located about 45 miles southeast of
West Palm Beach, is forecast to continue moving northwest between the
southeast Florida coast and Grand Bahama Island through sunrise. Isaias
is forecast to remain a strong tropical storm as it turns north-
northwest and moves parallel and very close to the central Florida
Atlantic coast.

Based on the current forecast motion, tropical storm conditions will
start to spread north across the Treasure Coast just after sunrise,
Brevard County by early afternoon, and coastal Volusia County during
mid to late afternoon. Tropical storm conditions should last about 12
hours once they begin.

The center of Isaias is expected to make its closest point of approach
to Martin, Saint Lucie, and Indian River Counties from 10 AM through
6 PM, the Brevard County coast from 6 PM through 2 AM Monday, and
coastal Volusia County coast between 2 AM and sunrise Monday.

Rain bands with gusty squalls from Isaias currently impacting the
Treasure Coast and Lake Okeechobee regions will increase and intensify
while spreading northward through tonight. Wind gusts of 40 to 50 mph
in some of the squalls along the coast this morning will increase to
near hurricane force as Isaias makes its closest approach. Farther
inland, gusts could reach as high as 45 to 55 mph in squalls.

Total rainfall amounts are expected to reach 2 to 4 inches across the
coastal counties with local amounts of up to 6 inches, mainly along
the immediate coast. Totals will be lower across the interior with
1 and 2 inches, and local amounts of 3 to 4 inches. Heavy rainfall is
likely to cause some flooding of urban and other poorly drained and
low-lying areas. This is especially the case in Indian River, Saint
Lucie and Martin Counties, where the late spring and summer were quite
wet.

A Storm Surge Watch remains in effect along the east central Florida
coast. There is the potential for life threatening storm surge along
portions of the immediate coast that are typically vulnerable to
elevated ocean levels or where dune erosion has occurred. Low land
flooding is also possible along the intracoastal waterways and in
vulnerable low lands near inlets and other low areas near the coast.

Seas will build to dangerous levels up to 20 to 25 feet, with large
breaking waves in excess of 7 feet and numerous strong rip currents in
the surf zone. Coupled with increasing astronomical high tides due to
the approaching full moon, moderate to locally significant beach
erosion will be likely during the next several high tide cycles. The
next two high tide cycles today will be around 730 AM this morning,
and again around 800 PM this evening.

Weather conditions will become increasingly hazardous as the day
progresses! Remain indoors in a safe shelter today, especially if you
live in the coastal counties.

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

* WIND:
Potential impacts from the main wind event are now starting to unfold
across the Coastal Counties of Martin, Saint Lucie and Indian River,
and will spread north across Volusia and Brevard Later today. Remain
well sheltered from dangerous winds and squalls having 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 will also begin to unfold
later today across the interior counties except for Lake County.
Shelter from hazardous winds and squalls having limited impacts.


* FLOODING RAIN:
Potential impacts from the flooding rain are starting to unfold across
East Central Florida. Remain well guarded against locally hazardous
flood waters having limited impacts. If realized, these impacts
include:
    - Localized rainfall flooding may prompt a few evacuations.
    - Rivers and tributaries may quickly rise with swifter currents.
      Small streams, creeks, canals, and ditches may become swollen
      and overflow in spots.
    - 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.


* SURGE:
Potential impacts from the main surge event will start to unfold across
the coastal counties of east central Florida. Remain away from storm surge
having possible limited impacts. If realized, these impacts include:
    - Localized inundation with storm surge flooding accentuated by
      waves. Damage to buildings in a few locations near the coast.
    - Major beach erosion with heavy surf breaching dunes. Strong and
      numerous rip currents.
    - Moderate damage to marinas, docks, boardwalks, and piers.
      Several small craft broken away from moorings, especially in
      unprotected anchorages.

Elsewhere across East Central Florida, little to no impact is
anticipated.


* TORNADOES:
Potential impacts from tornadoes are still unfolding along the
immediate coast. Remain well braced against a tornado event having
possible limited impacts. If realized, these 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.

Elsewhere across East Central Florida, little to no impact is
anticipated.


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

* OTHER PREPAREDNESS INFORMATION:
Now is the time to stay inside and away from windows. Listen for
updates and be ready in case you lose electrical power. Keep a battery-
powered radio, charged cell phone and flashlight handy.

During the peak of the storm be ready to move quickly. Keep your
shoes on and rain gear handy. Boots and athletic shoes offer the best
foot protection if you become unexpectedly exposed to the weather.

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.

Quickly move to the safest place within your shelter if it begins to
fail, preferably an interior room on the lowest floor as long as
flooding is not a concern.

If a tornado warning is issued for your area, quickly move to the
safest place within your shelter. Protect your head and body.

* 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 Melbourne FL around 12 Noon EDT, or sooner if conditions
warrant.

$$

Cristaldi
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