Mark Robertson

Mark Robertson

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Idalia barely hangs on as a category 1 storm but the danger is still there

The center of the hurricane is 100 miles SW of Savannah, moving NE at 20 mph. The most impact should be here in five hours or less. And it is now a minimal hurricane with 75 mph winds. Likely to be a tropical storm when it passes Savannah on its way to the Lowcountry.

The huge rain shield is trying to pinwheel around the core, but is staying on the northside of IDALIA with dry air now being pulled into the circulation on the southside.  

For those needing public transportation in the Lowcountry:

Effective Thursday, August 31, the Lowcountry Regional Transportation Authority (Palmetto Breeze Transit) is resuming all transportation services as weather and roadway conditions warrant. ALL PALMETTO BREEZE morning commuter services (including service to Palmetto Bluff) will operate on a TWO-HOUR DELAY to ensure the safety of road conditions following sunrise.

Remember if you are returning to work in the morning, drive carefully, give yourself extra travel time because we don't know what kind of debris there may be on the road and there may also be some first responders working which may slow you down.

BULLETIN

Hurricane Idalia Intermediate Advisory Number 16A

NWS National Hurricane Center Miami FL AL102023

200 PM EDT Wed Aug 30 2023

...IDALIA'S CORE MOVING ACROSS SOUTHEASTERN GEORGIA...

...FLASH AND RIVER FLOODING LIKELY ACROSS GEORGIA AND THE EASTERN

CAROLINAS THROUGH THURSDAY...

SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION

----------------------------------------------

LOCATION...31.4N 82.5W

ABOUT 10 MI...20 KM NNW OF WAYCROSS GEORGIA

ABOUT 100 MI...160 KM WSW OF SAVANNAH GEORGIA

MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H

PRESENT MOVEMENT...NE OR 35 DEGREES AT 20 MPH...31 KM/H

MINIMUM CENTRAL PRESSURE...981 MB...28.97 INCHES

WATCHES AND WARNINGS

--------------------

CHANGES WITH THIS ADVISORY:

The Hurricane Warning from the Suwanee River to the Ochlockonee

River, Florida, has been changed to a Tropical Storm Warning. The

Hurricane Warning has been discontinued west of the Ochlockonee

River.

The Tropical Storm Warning has been discontinued south of the

Volusia/Brevard County Line, Florida.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for...

* Englewood northward to Aucilla River Florida, including Tampa Bay

* St. Catherine's Sound Georgia to South Santee River South Carolina

A Hurricane Warning is in effect for...

* Altamaha Sound Georgia to Edisto Beach South Carolina

A Tropical Storm Warning is in effect for...

* Bonita Beach northward to Ochlockonee River Florida, including

Tampa Bay

* Volusia/Brevard County Line Florida to Altamaha Sound Georgia

* North of Edisto Beach South Carolina to the North Carolina/

Virginia border

* Pamlico and Albemarle Sounds

A Storm Surge Watch is in effect for...

* Bonita Beach northward to Englewood, including Charlotte Harbor

* Mouth of the St. Mary's River to St. Catherine's Sound Georgia

* Beaufort Inlet to Ocracoke Inlet North Carolina

* Neuse and Pamlico Rivers North Carolina

A Hurricane Watch is in effect for...

* Mouth of the St. Mary's River to Altamaha Sound

* Edisto Beach to South Santee River South Carolina

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 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 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. For a depiction of areas at

risk, please see the National Weather Service Storm Surge

Watch/Warning Graphic, available at hurricanes.gov.

A Hurricane Watch means that hurricane conditions are possible

within the watch area.

For storm information specific to your area, including possible

inland watches and warnings, please monitor products issued by your

local National Weather Service forecast office.

DISCUSSION AND OUTLOOK

----------------------

At 200 PM EDT (1800 UTC), the center of Hurricane Idalia was located

by Doppler radar near latitude 31.4 North, longitude 82.5 West.

Idalia is moving toward the northeast near 20 mph (31 km/h).

A turn toward the east-northeast is expected tonight, followed by an

eastward motion on Thursday. On the forecast track, the center of

Idalia will continue moving across southeastern Georgia through

this evening, near the coast of South Carolina tonight, and just

offshore the coast of southern North Carolina on Thursday. Idalia

is then expected to move east-southeastward over the western

Atlantic on Friday.

NOAA Doppler radar data indicate that maximum sustained winds have

decreased to near 75 mph (120 km/h) with higher gusts. Idalia is

forecast to weaken further, but it could still produce

hurricane-force winds, especially in gusts, through this evening

across portions of southeastern Georgia and southern South Carolina.

Idalia is forecast to be a tropical storm while moving near the

coasts of northeastern South Carolina and North Carolina tonight and

on Thursday.

Hurricane-force winds extend outward up to 25 miles (35 km) from

the center and tropical-storm-force winds extend outward up to 230

miles (370 km).

The estimated minimum central pressure is 981 mb (28.97 inches).

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 storm surge and 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...

Keaton Beach, FL to Yankeetown, FL...5-8 ft

Yankeetown, FL to Anclote River, FL...3-5 ft

Aucilla River, FL to Keaton Beach, FL...2-4 ft

Anclote River, FL to Bonita Beach, FL...2-4 ft

Tampa Bay...2-4 ft

Saint Catherines Sound, GA to South Santee River, SC...3-5 ft

Charlotte Harbor...2-4 ft

Mouth of the St. Mary's River to Saint Catherines Sound, GA...2-4 ft

Beaufort Inlet, NC to Ocracoke Inlet, NC...2-4 ft

Neuse River and Pamlico River...2-4 ft

Bonita Beach, FL to East Cape Sable, FL...1-3 ft

South Santee River, SC to Beaufort Inlet, NC...1-3 ft

Ocracoke Inlet, NC to Duck, NC...1-3 ft

Flagler/Volusia County Line, FL to Mouth of the St. Mary's

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 and destructive 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: Hurricane conditions are occurring within the hurricane

warning area in southern Georgia and will spread to the coasts of

Georgia and southern South Carolina within the hurricane warning

area later today. Hurricane conditions are possible within the

hurricane watch area along the Georgia and South Carolina coasts

later today.

Tropical storm conditions will continue through this afternoon

within the tropical storm warning area along the Florida west coast.

Tropical storm conditions are occurring within the tropical storm

warning area along the northeastern coast of Florida and Georgia

and will spread into South Carolina and North Carolina through the

day and into Thursday.

RAINFALL: Idalia is expected to produce a swath of 4 to 8 inches of

rainfall with isolated maxima up to 12 inches from portions of North

Florida through central Georgia and South Carolina, and through

eastern North Carolina into Thursday. These rainfall amounts will

lead to areas of flash, urban, and moderate river flooding, with

considerable impacts.

SURF: Swells generated by Idalia are affecting the eastern and

central Gulf coast from Florida to Louisiana, and will increase

along the southeastern U.S. coast today. These swells are likely to

cause life-threatening surf and rip current conditions. Please

consult products from your local weather office.

TORNADOES: A couple of tornadoes are possible today across central

and northeast Florida into southeast Georgia. The tornado threat

will increase through this afternoon across coastal South Carolina

and continue into tonight for coastal North Carolina.


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