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Hurricane Ian Intermediate Advisory Number 23A
NWS National Hurricane Center Miami FL AL092022
800 AM EDT Wed Sep 28 2022
...IAN EXPECTED TO CAUSE CATASTROPHIC STORM SURGE, WINDS, AND
FLOODING IN THE FLORIDA PENINSULA STARTING LATER TODAY...
SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION
ABOUT 55 MI...90 KM W OF NAPLES FLORIDA
ABOUT 60 MI...100 KM SW OF PUNTA GORDA FLORIDA
MAXIMUM SUSTAINED WINDS...155 MPH...250 KM/H
PRESENT MOVEMENT...NNE OR 15 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...937 MB...27.67 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for...
* Chokoloskee to Anclote River, including Tampa Bay
* Dry Tortugas
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
* Dry Tortugas
* Flagler/Volusia Line to the mouth of the St. Mary's River
* St. Johns River
A Tropical Storm Warning is in effect for...
* Cuban provinces of La Habana, Mayabeque, and Matanzas
* Indian Pass to the Anclote River
* All of the Florida Keys
* Flamingo to South Santee River
* 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
* Florida Bay
* Mouth of St. Mary's River to South Santee River
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 800 AM EDT (1200 UTC), the eye of Hurricane Ian was located by
Air Force and NOAA Hurricane Hunter data plus Key West radar near
latitude 26.0 North, longitude 82.7 West. Ian is moving toward the
north-northeast near 10 mph (17 km/h). This general motion with a
reduction in forward speed is forecast today, followed by a turn
toward the north on Thursday. On the forecast track, the center of
Ian is expected to move onshore within the hurricane warning area
later this morning or early afternoon. The center of Ian is
forecast to move over central Florida tonight and Thursday morning
and emerge over the western Atlantic by late Thursday.
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. Weakening is expected
Hurricane-force winds extend outward up to 40 miles (65 km) from
the center and tropical-storm-force winds extend outward up to 175
miles (280 km).
The minimum central pressure is 937 mb (27.67 inches) based on Air
Force Hurricane Hunter 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...12-16 ft
* Middle of Longboat Key to Englewood... 6-10 ft
* Bonita Beach to Chokoloskee...7-11 ft
* Anclote River to Middle of Longboat Key, including Tampa Bay...4-6
* Chokoloskee to East Cape Sable...4-7 ft
* Suwannee River to Anclote River...3-5 ft
* Lower Keys from Key West to Big Pine Key, including the
Dry Tortugas...3-5 ft
* Flagler/Volusia County Line to Savannah River including St. Johns
* St. Johns River south of Julington...2-4 ft
* Savannah River to South Santee River...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
* Indian Pass to Suwanee River...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
WIND: Catastrophic wind damage is likely where the core of Ian
moves onshore. Hurricane conditions will begin along the west
coast of Florida within the Hurricane Warning area later this
morning, with tropical storm conditions beginning before daybreak.
Tropical storm conditions are occurring in the warning area in the
Florida Keys, and will continue this morning. Tropical storm
conditions are expected in the warning area on the east coast of
Florida beginning today, and should spread up the Georgia and
South Carolina coasts tonight and Thursday. Tropical storm
conditions are expected within the warning area in Cuba for the
next few hours.
RAINFALL: Ian is expected to produce the following storm total
* 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
later this week through the weekend.
TORNADOES: Tornadoes are possible today and tonight across central
and south 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 complete advisory at 1100 AM EDT.