Atlantic Basin Tropical Cyclones

Hurricane Ian Public Advisory


023 
WTNT34 KNHC 281758
TCPAT4

BULLETIN
Hurricane Ian Intermediate Advisory Number 24A
NWS National Hurricane Center Miami FL       AL092022
200 PM EDT Wed Sep 28 2022

...IAN CAUSING CATASTROPHIC STORM SURGE, WINDS, AND FLOODING IN
THE FLORIDA PENINSULA...


SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION
----------------------------------------------
LOCATION...26.6N 82.3W
ABOUT 50 MI...80 KM SSW OF PUNTA GORDA FLORIDA
ABOUT 25 MI...40 KM WNW OF FORT MYERS FLORIDA
MAXIMUM SUSTAINED WINDS...155 MPH...250 KM/H
PRESENT MOVEMENT...NNE OR 15 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...937 MB...27.67 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

The Hurricane Warning and the Storm Surge Warning for the Dry 
Tortugas has been discontinued.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Warning is in effect for...
* Chokoloskee to Anclote River, including Tampa Bay
* Sebastian Inlet to Flagler/Volusia County Line

A Storm Surge Warning is in effect for...
* Suwannee River southward to Flamingo
* Tampa Bay
* Lower Florida Keys from Big Pine Key westward to Key West
* Flagler/Volusia Line to the mouth of the South Santee River
* St. Johns River

A Tropical Storm Warning is in effect for...
* Indian Pass to the Anclote River
* All of the Florida Keys
* Flamingo to Sebastian Inlet
* Flagler/Volusia County Line to Little River Inlet
* Flamingo to Chokoloskee
* Lake Okeechobee
* Florida Bay
* Bimini and Grand Bahama Islands

A Storm Surge Watch is in effect for...
* Florida Keys from the Card Sound Bridge westward to east of Big
Pine Key
* Florida Bay

A Hurricane Watch is in effect for...
* Flagler/Volusia County Line to the South Santee River
* Lake Okeechobee

A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline, in
the indicated locations. For a depiction of areas at risk, please
see the National Weather Service Storm Surge Watch/Warning Graphic,
available at hurricanes.gov.  This is a life-threatening situation.
Persons located within these areas should take all necessary actions
to protect life and property from rising water and the potential for
other dangerous conditions.  Promptly follow evacuation and other
instructions from local officials.

A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area.  Preparations to protect life and
property should be rushed to completion.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.

A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations during the next 48 hours.

For storm information specific to your area, please monitor
products issued by your national meteorological service.


DISCUSSION AND OUTLOOK
----------------------
At 200 PM EDT (1800 UTC), the eye of Hurricane Ian was located by an 
Air Force Reserve Hurricane Hunter aircraft and Tampa radar data 
near latitude 26.6 North, longitude 82.3 West. Ian is moving toward 
the north-northeast near 9 mph (15 km/h). This general motion with a 
reduction in forward speed is forecast today, followed by a turn 
toward the northeast on Thursday. On the forecast track, the center 
of Ian is expected to move onshore soon, move over central Florida 
tonight and Thursday morning and emerge over the western Atlantic by 
late Thursday.  Ian is forecast to turn northward on Friday and 
approach the northeastern Florida coast in addition to the Georgia 
and South Carolina coasts late Friday.

Maximum sustained winds remain near 155 mph (250 km/h) with higher
gusts.  Ian is a category 4 hurricane on the Saffir-Simpson
Hurricane Wind Scale.  Ian is forecast to make landfall on the west
coast of Florida as a catastrophic hurricane soon.  Weakening is 
expected after landfall, but Ian could be near hurricane strength 
when it moves over the Florida East coast tomorrow, and when it 
approaches the northeastern Florida, Georgia and South Carolina 
coasts late Friday.

Hurricane-force winds extend outward up to 45 miles (75 km) from
the center and tropical-storm-force winds extend outward up to 175
miles (280 km).  A River, Estuary, and Coastal Network station at 
Redfish Pass, Florida, recently reported sustained winds of 94 mph 
(151 km/h) and a wind gust of 126 mph (203 km/h), A Weatherflow 
station at Tarpon Point recently reported sustained winds of 83 mph 
(134 km/h) with a gust to 101 mph (163 km/h).

The minimum central pressure is 937 mb (27.67 inches) based on Air 
Force Reserve dropsonde data.


HAZARDS AFFECTING LAND
----------------------
Key messages for Ian can be found in the Tropical Cyclone Discussion
under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC and on the
web at hurricanes.gov/text/MIATCDAT4.shtml.

STORM SURGE:  The combination of storm surge and the tide will cause
normally dry areas near the coast to be flooded by rising waters
moving inland from the shoreline.  The water could reach the
following heights above ground somewhere in the indicated areas if
the peak surge occurs at the time of high tide...

* Englewood to Bonita Beach, including Charlotte Harbor...12-18 ft
* Middle of Longboat Key to Englewood...6-10 ft
* Bonita Beach to Chokoloskee...8-12 ft
* Chokoloskee to East Cape Sable...5-8 ft
* Anclote River to Middle of Longboat Key, including Tampa Bay...4-6
ft
* Suwannee River to Anclote River...3-5 ft
* Lower Keys from Key West to Big Pine Key...3-5 ft
* Flagler/Volusia County Line to Altamaha Sound...4-6 ft
* Altamaha Sound to South Santee River ...3-5 ft
* St. Johns River north of Julington...3-5 ft
* St. Johns River south of Julington...2-4 ft
* East Cape Sable to Card Sound Bridge...2-4 ft
* Florida Keys east of Big Pine Key...2-4 ft
* Patrick Air Force Base to Flagler/Volusia County Line...1-3 ft
* North of South Santee River to Surf City NC...1-3 ft
* Dry Tortugas...1-3 ft

The deepest water will occur along the immediate coast near and to
the right of the center, where the surge will be accompanied by
large waves.  Surge-related flooding depends on the relative timing
of the surge and the tidal cycle, and can vary greatly over short
distances.  For information specific to your area, please see
products issued by your local National Weather Service forecast
office.

WIND:  Catastrophic wind damage is likely where the core of Ian
moves onshore.  Hurricane conditions are ongoing within the 
Hurricane Warning area now and will slowly spread northeastward 
through the day.

Hurricane conditions are expected to begin along the east coast of
Florida in the Hurricane Warning area starting early Thursday.  
Hurricane conditions are possible in the Hurricane Watch area on 
Thursday through late Friday.

Tropical storm conditions are occurring in the warning area in the
Florida Keys, and will continue for a few more hours.  Tropical 
storm conditions are occuring in parts of the warning area on the 
east coast and should spread northward through the Georgia
and South Carolina coasts tonight and Thursday.  

RAINFALL: Ian is expected to produce the following storm total
rainfall:

* Florida Keys and South Florida: 6 to 8 inches, with local maxima
up to 12 inches.
* Central and Northeast Florida: 12 to 18 inches, with local
maxima up to 24 inches.
* Eastern Georgia and Coastal South Carolina: 4 to 8 inches, with
local maxima of 12 inches.

Widespread, life-threatening catastrophic flash, urban, and river
flooding is expected across central Florida.  Widespread
considerable flash, urban, and river flooding is expected across
portions of southern Florida through Wednesday, and northeast
Florida, southeastern Georgia, and coastal South Carolina later this
week through the weekend.  Limited flash, urban, and river flooding
is possible over portions of the Southeast and southern Mid-Atlantic
U.S. later this week through the weekend.

TORNADOES: Tornadoes are possible today and tonight, especially
across east central Florida.

SURF:  Swells generated by Ian are affecting the northern coast
of Cuba, the northeastern coast of the Yucatan peninsula and
west coast of Florida. Swells will increase along the east coast of
Florida, Georgia, and South Carolina tonight and Thursday.  These
swells are likely to cause life-threatening surf and rip current
conditions. Please consult products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 500 PM EDT.

$$
Forecaster Blake




Source link