BULLETIN
Tropical Storm Idalia Advisory Number 9
NWS National Hurricane Center Miami FL AL102023
400 PM CDT Mon Aug 28 2023
…IDALIA NEARING HURRICANE STRENGTH AS IT APPROACHES WESTERN
CUBA…
…LIFE-THREATENING STORM SURGE AND DANGEROUS WINDS BECOMING
INCREASINGLY LIKELY FOR PORTIONS OF FLORIDA…
SUMMARY OF 400 PM CDT…2100 UTC…INFORMATION
———————————————-
LOCATION…21.4N 85.1W
ABOUT 35 MI…60 KM SSW OF THE WESTERN TIP OF CUBA
ABOUT 265 MI…430 KM SSW OF THE DRY TORTUGAS
MAXIMUM SUSTAINED WINDS…70 MPH…110 KM/H
PRESENT MOVEMENT…N OR 360 DEGREES AT 8 MPH…13 KM/H
MINIMUM CENTRAL PRESSURE…987 MB…29.15 INCHES
WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:
The Storm Surge Warning has been extended westward to Indian Pass
Florida. The Hurricane Warning has also been extended westward to
Indian Pass. A Tropical Storm Warning has been issued from west of
Indian Pass westward to Mexico Beach.
The Storm Surge Watch along the southeast coast of the United
States has been extended northward to South Santee River.
The Tropical Storm Watch along the southeast coast of the United
States has been extended northward to South Santee River.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Warning is in effect for...
* Englewood northward to Indian Pass, including Tampa Bay
A Hurricane Warning is in effect for…
* Cuban province of Pinar del Rio
* Middle of Longboat Key northward to Indian Pass, including Tampa
Bay
A Tropical Storm Warning is in effect for…
* Yucatan Peninsula from Tulum to Rio Lagartos, including Cozumel
* Isle of Youth Cuba
* Dry Tortugas Florida
* Chokoloskee northward to the Middle of Longboat Key
* West of Indian Pass to Mexico Beach
A Storm Surge Watch is in effect for…
* Chokoloskee northward to Englewood, including Charlotte Harbour
* Mouth of the St. Mary’s River to South Santee River South
Carolina
A Hurricane Watch is in effect for…
* Englewood to the Middle of Longboat Key
A Tropical Storm Watch is in effect for…
* Lower Florida Keys west of the west end of the Seven Mile Bridge
* Sebastian Inlet Florida northward to South Santee River South
Carolina
HAZARDS AFFECTING LAND
———————-
Key messages for Idalia can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT5 and WMO header WTNT45 KNHC,
and on the web at hurricanes.gov/text/MIATCDAT5.shtml
STORM SURGE: The combination of a dangerous 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…
Aucilla River, FL to Chassahowitzka, FL…8-12 ft
Chassahowitzka, FL to Anclote River, FL…6-9 ft
Ochlockonee River, FL to Aucilla River, FL…5-8 ft
Anclote River, FL to Middle of Longboat Key, FL…4-7 ft
Tampa Bay…4-7 ft
Middle of Longboat Key, FL to Englewood, FL…3-5 ft
Englewood, FL to Chokoloskee, FL…2-4 ft
Charlotte Harbor…2-4 ft
Indian Pass, FL to Ochlockonee River, FL…3-5 ft
Mouth of the St. Mary’s River to South Santee, SC…2-4 ft
Chokoloskee, FL to East Cape Sable, FL…1-3 ft
Flagler/Volusia County Line, FL to Mouth of St. Mary’s River…1-3
ft
Indian Pass to Mexico Beach…1 to 3 ft.
Florida Keys…1-2 ft
WIND: Hurricane and tropical storm conditions are expected within
the warning areas in western Cuba through Tuesday morning.
Tropical storm conditions are expected over portions of the
tropical storm warning area over the Yucatan Peninsula.
Hurricane conditions are expected within the hurricane warning area
in Florida by late Tuesday or Wednesday, with tropical storm
conditions beginning on Tuesday.
Tropical storm conditions are expected in the Dry Tortugas
beginning tonight and within the tropical storm warning area
along the Florida Gulf coast on Tuesday.
Tropical storm conditions are possible along the southeast U.S.
coast within the southern portions of the watch area by early
Wednesday.
RAINFALL: Idalia is expected to produce the following rainfall
amounts:
Portions of the eastern Yucatan: Additional 1 to 2 inches.
Western Cuba: 4 to 7 inches, with isolated higher totals of 10
inches.
Portions of the west coast of Florida, the Florida Panhandle,
southeast Georgia and the eastern Carolinas: 4 to 8 inches from
Tuesday into Thursday. Isolated higher totals of 12 inches possible,
primarily near landfall in northern Florida.
This rainfall may lead to flash and urban flooding, and landslides
across western Cuba.
Areas of flash and urban flooding, some of which may be locally
significant, are expected across portions of the west coast of
Florida, the Florida Panhandle, and southern Georgia Tuesday into
Wednesday, spreading into portions of the eastern Carolinas
Wednesday into Thursday.
SURF: Swells generated by Idalia are affecting portions of the
southern coast of Cuba and eastern Yucatan. These swells will
spread northward along the eastern Gulf Coast during the next day
or two. These swells are likely to cause life-threatening surf and
rip current conditions. Please consult products from your local
weather office.
TORNADOES: A few tornadoes will be possible starting Tuesday along
the west central Florida coast and the tornado threat will spread
northward into the Florida Big Bend area by Tuesday night.