238
WTNT34 KWNH 110833
TCPAT4

BULLETIN
Post-Tropical Cyclone Isaias Advisory Number 19
NWS Weather Prediction Center College Park MD AL092026
400 AM CDT Sun Oct 11 2026

...FLASH FLOODING RISK CONTINUES ALONG BLUE RIDGE AS ISAIAS
STARTS ACCELERATION NORTHEASTWARD...

SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ----------------------------------------------
LOCATION...35.4N 85.9W
ABOUT 65 MI...105 KM SE OF NASHVILLE TENNESSEE
ABOUT 70 MI...115 KM NE OF HUNTSVILLE ALABAMA
MAXIMUM SUSTAINED WINDS...25 MPH...35 KM/H
PRESENT MOVEMENT...NE OR 55 DEGREES AT 23 MPH...37 KM/H
MINIMUM CENTRAL PRESSURE...1010 MB...29.83 INCHES

WATCHES AND WARNINGS
--------------------
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

Flood Watches are in effect for...
* Coastal portions of the Carolinas
* Blue Ridge of Central and Southern Appalachians

Wind Advisory is in effect for...
* Portions of the Southeast and Southern Appalachians

DISCUSSION AND OUTLOOK
----------------------
At 400 AM CDT (0900 UTC), the center of Post-Tropical Cyclone Isaias
was located near latitude 35.4 North, longitude 85.9 West. The
post-tropical cyclone is starting to move toward the
northeast and this motion is expected to increase toward 20 mph (32
km/h) and maintain for the remainder of today.

Maximum sustained winds are near 25 mph (35 km/h) with higher gusts.
Little change in strength is forecast during the next 24 hours.

The estimated minimum central pressure is 1010 mb (29.83 inches).

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

RAINFALL: Rainfall totals of 1 to 3 inches with localized maximum
amounts of 5 inches are possible across the Central Appalachians
into the Mid-Atlantic. Rainfall totals of 1 inch possible along
coastal sections of North Carolina. .

Isolated flash, urban flooding possible across the Central
Appalachians and Mid-Atlantic.. Significant river flooding across
the western Florida Panhandle will crest on Sunday.

For a complete depiction of forecast rainfall associated with
Isaias, 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
with Isaias, 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 couple of tornadoes are possible today across the
Piedmont and Coastal Plain of Virginia and North Carolina.

WIND: Strong wind gusts continue to pose a threat across the
southeastern United States today, particularly near the Southern
Appalachians. Scattered power outages and downed trees and
power lines may occur, with the risk highest in elevated terrain.

SURF: Swells from Isaias will continue to affect much of the
Gulf and Southeast coasts of the United States, Mexico, and western
Cuba this weekend. These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.

A depiction of rip current risk for the United States can be found
at: hurricanes.gov/graphics_at4.shtml?ripCurrents

NEXT ADVISORY
-------------
Next complete advisory at 1000 AM CDT.

$$
Forecaster Gallina
NNN
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