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Hurricane Isaias Intermediate Advisory Number 28A
NWS National Hurricane Center Miami FL AL092020
200 AM EDT Tue Aug 04 2020
...CENTER OF ISAIAS MOVING QUICKLY NORTH-NORTHEASTWARD OVER
EASTERN NORTH CAROLINA...
...STRONG WINDS AND HEAVY RAINFALL TO SPREAD NORTHWARD ALONG THE
MID-ATLANTIC COAST THIS MORNING...
SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION
ABOUT 60 MI...95 KM SW OF GREENVILLE NORTH CAROLINA
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...NNE OR 20 DEGREES AT 23 MPH...37 KM/H
MINIMUM CENTRAL PRESSURE...992 MB...29.29 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
Hurricane and Storm Surge Warnings south of Little River Inlet
South Carolina have been discontinued.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Warning is in effect for...
* Little River Inlet South Carolina to Cape Fear North Carolina
* Pamlico and Albemarle Sounds, including the Neuse and Pamlico
* Ocracoke Inlet North Carolina to the North Carolina/Virginia
A Storm Surge Watch is in effect for...
* Cape Fear to Ocracoke Inlet North Carolina
A Hurricane Warning is in effect for...
* Little River Inlet South Carolina to Surf City North Carolina
A Tropical Storm Warning is in effect for...
* North of Surf City North Carolina to Eastport Maine
* Pamlico and Albemarle Sounds
* Chesapeake Bay
* Tidal Potomac River
* Delaware Bay
* Long Island and Long Island Sound
* Martha's Vineyard, Nantucket, and Block Island
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 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
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, generally within 36
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 AM EDT (0600 UTC), the center of Hurricane Isaias was located
near latitude 35.0 North, longitude 78.1 West. Isaias is moving
toward the north-northeast near 23 mph (37 km/h), and this general
motion accompanied by an increase in forward speed is expected
through today. On the forecast track, the center of Isaias will
continue to move across eastern North Carolina early this morning.
The center will move into southeastern Virginia around daybreak,
near or along the coast of the mid-Atlantic states today, and
continue across the northeastern United States tonight.
Maximum sustained winds are near 75 mph (140 km/h) with higher
gusts. Only gradual weakening is anticipated while Isaias moves
north-northeastward near the mid-Atlantic coast today.
Hurricane-force winds extend outward up to 25 miles (35 km) from
the center, and tropical-storm-force winds extend outward up to 125
miles (205 km). A wind gust to 64 mph (104 km/h) was recently
reported near Bogue, North Carolina.
The estimated minimum central pressure is 992 mb (29.29 inches).
HAZARDS AFFECTING LAND
Key messages for Isaias can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC,
and on the web at www.hurricanes.gov/text/MIATCDAT4.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...
Little River Inlet SC to Ocracoke Inlet NC...2-4 ft
Ocracoke Inlet to the North Carolina/Virginia border including
Pamlico Sound, Albemarle Sound, Neuse and Pamlico Rivers...3-5 ft
North of the North Carolina/Virginia border to Martha's Vineyard
including the Chesapeake Bay, the Tidal Potomac River, Delaware Bay,
Long Island Sound, Block Island Sound, Narragansett Bay, Buzzards
Bay, and Vineyard Sound...1-3 ft
The deepest water will occur along the immediate coast in areas of
onshore winds, 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: Hurricane conditions will continue across portions of the
hurricane warning area for another hour or two.
Widespread tropical-storm conditions are expected in the
tropical storm warning area from coastal North Carolina to the
mid-Atlantic states, including portions of the Chesapeake Bay
region, later today, with wind gusts to hurricane force possible.
These winds could cause tree damage and power outages.
Tropical storm conditions are expected to reach southern New
England this afternoon and northern New England tonight and early
Gale-force winds are expected to spread into southeastern Quebec
tonight and Wednesday. See products issued by Environment
Canada for more information.
RAINFALL: The following rainfall accumulations are expected along
and near the track of Isaias:
Carolinas and the Mid-Atlantic: 3 to 6 inches, isolated maximum
totals 8 inches.
Eastern New York and western New England from Connecticut to New
Hampshire: 2 to 4 inches, isolated maximum totals 6 inches.
Western and northern Maine: 1 to 3 inches.
Heavy rainfall along the East Coast, near the path of Isaias, will
result in flash and urban flooding, some of which may be significant
in the eastern Carolinas, Mid-Atlantic and Northeast through
Wednesday. Widespread minor to moderate river flooding is possible
across portions of the Carolinas and the Mid-Atlantic.
Quick-responding rivers in Northeast will also be susceptible to
minor river flooding.
TORNADOES: A few tornadoes will be possible across eastern North
Carolina early this morning, and from eastern Virginia
northeastward into southern New England today.
SURF: Swells generated by Isaias are affecting portions of the
southeast coast of the United States and will spread northward
along the Mid-Atlantic and Northeast coasts of the United States
today. These swells are likely to cause life-threatening surf and
rip current conditions. Please consult products from your local
Next complete advisory at 500 AM EDT.