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  • Writer's pictureJaclyn St James

8AM TROPICAL STORM IAN UPDATE 9/29/22



At 800 AM EDT (1200 UTC), the center of Tropical Storm Ian was

located near latitude 28.5 North, longitude 80.7 West. Ian is

moving toward the northeast near 8 mph (13 km/h). A turn toward the

north-northeast is expected later today, followed by a turn toward

the north and north-northwest with an increase in forward speed

Friday and Friday night. On the forecast track, the center of Ian

is expected to move off the east-central coast of Florida soon and

then approach the coast of South Carolina on Friday. The

center will move farther inland across the Carolinas Friday night

and Saturday.


Maximum sustained winds remain near 65 mph (100 km/h) with higher

gusts. Some re-intensification is forecast, and Ian could be near

hurricane strength when it approaches the coast of South Carolina

on Friday. Weakening is expected Friday night and Saturday after

Ian moves inland.


Tropical-storm-force winds extend outward up to 415 miles (665 km)

from the center. Daytona Beach International Airport recently

reported a sustained wind of 60 mph (97 km/h) and a gust to 70 mph

(113 km/h).


The estimated minimum central pressure is 987 mb (29.15 inches)

based on surface observations.



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...


* Flagler/Volusia County Line to South Santee River...4-6 ft

* St. Johns River north of Julington...3-5 ft

* St. Johns River south of Julington...2-4 ft

* South Santee River to Little River Inlet...2-4 ft

* Patrick Air Force Base to Flagler/Volusia County Line...1-3 ft

* East of Little River Inlet to Cape Lookout...1-3 ft

* Englewood to Chokoloskee including Charlotte Harbor... 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: Tropical storm conditions are occuring in parts of the

warning area on the east and west coasts of Florida and should

spread northward along the Georgia, South Carolina, and North

Carolina coasts today through Friday. Hurricane conditions are

possible within the Hurricane Watch area in northeastern Florida,

Georgia, and South Carolina through Friday.


RAINFALL: Ian is expected to produce the following storm total

rainfall:


* Northeast Florida, coastal Georgia and Lowcountry of South

Carolina: 4 to 8 inches, with local maxima of 12 inches.

* Upstate and central South Carolina, North Carolina, and southern

Virginia: 3 to 6 inches with local maxima of 8 inches across western

North Carolina.


Widespread, life-threatening catastrophic flash and urban flooding,

with major to record flooding along rivers, will continue across

central Florida. Widespread considerable flash, urban, and river

flooding is expected across portions of northeast Florida,

southeastern Georgia, and eastern South Carolina tomorrow through

the weekend. Locally considerable flash, urban, and river flooding

is possible this weekend across portions of the southern

Appalachians, where landslides will be possible as well. Limited

flooding is possible across portions of the southern Mid-Atlantic.


TORNADOES: A tornado or two remains possible across east-central

and northeast Florida through this morning. This threat will shift

into the coastal Carolinas on Friday.


SURF: Swells generated by Ian are affecting the northern coast

of Cuba, the northeastern coast of the Yucatan peninsula and

Florida. Swells will increase along the coasts of Georgia,

South Carolina and North Carolina today. These swells are likely

to cause life-threatening surf and rip current conditions. Please

consult products from your local weather office.





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