• ADVISORY 16A TS Debby

    From Mike Powell@618:250/1 to All on Tue Aug 6 09:09:00 2024
    568
    WTNT34 KNHC 061158
    TCPAT4

    BULLETIN
    Tropical Storm Debby Intermediate Advisory Number 16A
    NWS National Hurricane Center Miami FL AL042024
    800 AM EDT Tue Aug 06 2024

    ...DEBBY EXPECTED TO MOVE OFFSHORE OF THE GEORGIA COAST LATER TODAY...
    ...MAJOR FLOOD THREAT OVER PORTIONS OF GEORGIA, SOUTH CAROLINA, AND
    NORTH CAROLINA OVER THE NEXT FEW DAYS...

    SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION ----------------------------------------------
    LOCATION...31.9N 81.3W
    ABOUT 20 MI...35 KM SW OF SAVANNAH GEORGIA
    ABOUT 105 MI...165 KM SW OF CHARLESTON SOUTH CAROLINA
    MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
    PRESENT MOVEMENT...NE OR 50 DEGREES AT 6 MPH...9 KM/H
    MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES

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

    The Tropical Storm Warning south of Altamaha Sound is discontinued.

    SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

    A Storm Surge Warning is in effect for...
    * Altamaha Sound, Georgia to South Santee River, South Carolina

    A Storm Surge Watch is in effect for...
    * North of South Santee River, South Carolina to Cape Fear, North
    Carolina

    A Tropical Storm Warning is in effect for...
    * Altamaha Sound, Georgia to Little River Inlet, South Carolina

    A Tropical Storm Watch is in effect for...
    * North of Little River Inlet, South Carolina to Surf City, North
    Carolina

    A Storm Surge Warning means there is a danger of life-threatening
    inundation, from rising water moving inland from the coastline. 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 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 a depiction of areas at risk, please see the National Weather
    Service Storm Surge Watch/Warning Graphic, available at
    hurricanes.gov.

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

    A Tropical Storm Watch means that tropical storm conditions are
    possible within the watch area, generally within 48 hours.

    Interests elsewhere along the southeastern coast of the United
    States should monitor the progress of this system. Additional
    watches or warnings may be required later today.

    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 800 AM EDT (1200 UTC), the center of Tropical Storm Debby was
    located inland over southeastern Georgia near latitude 31.9 North,
    longitude 81.3 West. Debby is moving toward the northeast near 6 mph
    (9 km/h). A slow motion toward the east and then north is expected
    through Thursday night. On the forecast track, the center of Debby
    is expected to move offshore the coast of Georgia later today, drift
    offshore through early Thursday, and then move inland over South
    Carolina on Thursday.

    Maximum sustained winds are near 45 mph (75 km/h) with higher
    gusts. Some strengthening is forecast on Wednesday and Thursday
    while Debby drifts offshore.

    Tropical-storm-force winds extend outward up to 205 miles (335 km)
    to the east of the center. Sustained winds of 39 mph (63 km/h)
    and a gust to 48 mph (78 km/h) were recently reported at Winyah Bay
    Light near Georgetown, South Carolina.

    The estimated minimum central pressure is 999 mb (29.50 inches).

    HAZARDS AFFECTING LAND
    ----------------------
    Key messages for Debby can be found in the Tropical Cyclone
    Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC.

    WIND: Tropical storm conditions are expected over portions of the
    tropical storm warning area along the Georgia coast through this
    morning. Tropical storm conditions are expected to continue along
    the coast of South Carolina within the tropical storm warning area
    through Thursday night. Tropical storm conditions are possible
    within the tropical storm watch area in North Carolina beginning
    Wednesday night.

    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...

    Altamaha Sound, GA to Cape Fear, NC...2-4 ft

    For a complete depiction of areas at risk of storm surge inundation,
    please see the National Weather Service Peak Storm Surge Graphic,
    available at hurricanes.gov/graphics_at4.shtml?peakSurge.

    RAINFALL: Debby is expected to produce potentially historic rainfall
    totals of 10 to 20 inches, with maximum amounts of 25 inches,
    bringing areas of catastrophic flooding across portions of southeast
    Georgia, the eastern half of South Carolina, and southeast North
    Carolina through Friday.

    From northern North Carolina through portions of the Mid-Atlantic
    States, 4 to 8 inches of rainfall, with local amounts to 12 inches,
    are expected through Sunday morning. This rainfall will likely
    result in areas of considerable flash and urban flooding, with river
    flooding possible.

    An additional scattered 1 to 2 inches of rainfall, with maximum
    amounts of 4 inches is possible across western portion of the
    Central Florida Peninsula today which may aggravate any ongoing
    flooding conditions across that vicinity.

    For a complete depiction of forecast rainfall and flash flooding
    associated with Debby, please see the National Weather Service
    Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at4.shtml?rainqpf and the Flash Flood Risk
    graphic at hurricanes.gov/graphics_at4.shtml?ero. For a list of
    rainfall observations (and wind reports) associated this storm, see
    the companion storm summary at WBCSCCNS4 with the WMO header ACUS44
    KWBC or at the following link: http://www.wpc.ncep.noaa.gov/discussions/nfdscc4.html

    TORNADOES: A few tornadoes are possible over coastal South Carolina
    tonight through early Wednesday morning.

    SURF: Swells generated by Debby are expected to affect much of the
    Gulf coast of Florida through tonight. Swells will continue to
    affect the Southeast U.S. coast through the end of the week.
    These conditions 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 1100 AM EDT.

    $$
    Forecaster Pasch

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