[Tropical] Hurricane Local Statement

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Hurricane Idalia Local Statement Advisory Number 11
National Weather Service Miami FL  AL102023
513 AM EDT Tue Aug 29 2023

This product covers South Florida

**Idalia Strengthens to a Hurricane in the Southeastern Gulf of
Mexico**

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

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning and Storm Surge Watch are in effect
      for Coastal Collier County
    - A Tropical Storm Watch is in effect for Inland Collier County

* STORM INFORMATION:
    - About 350 miles west-southwest of Miami FL or about 290 miles
      southwest of Naples FL
    - 23.1N 85.0W
    - Storm Intensity 75 mph
    - Movement North or 360 degrees at 14 mph

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

Hurricane Idalia has begun to move northward into the southeastern
Gulf of Mexico this morning, and is expected to strengthen today as
it moves northward.

The following are the primary hazards of concern with Idalia:

* Coastal Flooding/Surge - Higher than usual tides due to the
combination of surge from Idalia and the upcoming full moon could lead
to coastal flooding of 2 to 4 feet in coastal Collier county and 1 to
3 feet along the coast of mainland Monroe County. Other vulnerable
coastal areas of southern Florida could also experience minor coastal
flooding, especially around the times of high tide.

* Rainfall - The majority of the rainfall associated with the system
is forecast to fall through Wednesday. The greatest risk for flash
flooding will be near the Gulf coast. Storm total rain amounts of 2 to
3 inches with localized higher amounts. The highest amounts are
anticipated along the Gulf coast.

* Wind - Increasingly gusty winds are forecast today and Wednesday,
particularly along the Gulf coast and adjacent coastal waters. A
reasonable worst case scenario would have tropical storm force
winds across Collier County between this morning and Wednesday.
The remainder of South Florida could see winds gusts up to 35mph,
with the highest gusts likely during the day on Wednesday.

* Tornadoes - A low-end tornado threat is possible through Wednesday
as banding from the system moves ashore. The best chance for a tornado
would be across the western half of South Florida.

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

* SURGE:
Protect against life-threatening surge having possible significant
impacts across coastal Collier County. Potential impacts in this area
include:
    - Areas of inundation with storm surge flooding accentuated by
      waves. Damage to several buildings, mainly near the coast.
    - Sections of near-shore escape routes and secondary roads become
      weakened or washed out, especially in usually vulnerable low
      spots.
    - 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.

Also, protect against locally hazardous surge having possible limited
impacts across coastal portions of Mainland Monroe County.

* FLOODING RAIN:
Protect against dangerous rainfall flooding having possible
significant impacts across Southwest Florida. Potential impacts
include:
    - Ditches and canals may quickly become swollen with swift
      currents and overspill their banks in a few places, especially
      in usually vulnerable spots.
    - Several places may experience expanded areas of rapid
      inundation at underpasses, low-lying spots, and poor drainage
      areas. Some streets and parking lots take on moving water as
      storm drains and retention ponds overflow. Driving conditions
      become hazardous. Some road and bridge closures.

Protect against locally hazardous rainfall flooding having possible
limited impacts across the rest of South Florida.

* WIND:
Protect against hazardous wind having possible limited impacts across
Southwest Florida. Potential impacts in this area include:
    - Damage to porches, awnings, carports, sheds, and unanchored
      mobile homes. Unsecured lightweight objects blown about.
    - Some large tree limbs broken off. A few trees snapped or
      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.

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

* TORNADOES:
Protect against a tornado event having possible limited impacts
across South Florida. 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 official 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:
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.

Keep cell phones well charged. Cell phone chargers for automobiles
can be helpful, but be aware of your risk for deadly carbon monoxide
poisoning if your car is left idling in a garage or other poorly
ventilated area.

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.

Storm surge is the leading killer associated with tropical storms and
hurricanes! Make sure you are in a safe area away from the surge
zone. Even if you are not in a surge-prone area, you could find
yourself cutoff by flood waters during and after the storm. Heed
evacuation orders issued by the 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 11AM, or sooner if conditions warrant.

$$
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