121
WTNT34 KWNH 101458
TCPAT4

BULLETIN
Post-Tropical Cyclone Isaias Advisory Number 16
NWS Weather Prediction Center College Park MD AL092026
1000 AM CDT Sat Oct 10 2026

...FLASH FLOODING RISK CONTINUES WITH ISAIAS...


SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION -----------------------------------------------
LOCATION...32.8N 86.8W
ABOUT 50 MI...80 KM S OF BIRMINGHAM ALABAMA
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...NNW OR 335 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES


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

Flood Watches are in effect for...
* Portions of the Southeast United States
* Southern Appalachians

High Wind Warning is in effect for...
* Northeast Alabama, northern Georgia, southern Appalachians

Wind Advisory is in effect for...
* Much of the remainder of the Southeast United States


DISCUSSION AND OUTLOOK
----------------------
At 1000 AM CDT (1500 UTC), the center of Post-Tropical Cyclone
Isaias was located near latitude 32.8 North, longitude 86.8 West.
The post-tropical cyclone is moving toward the north-northwest near
10 mph (17 km/h) and this motion is expected to continue today,
with a turn to the northeast tonight into Sunday.

Maximum sustained winds are near 35 mph (55 km/h) with higher
gusts, especially in areas of elevated terrain. Wind gusts may
increase during the day today, with weakening speeds expected
tonight into Sunday.

The estimated minimum central pressure is 1006 mb (29.71 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 3 to 6 inches with localized maximum
amounts of 10 inches are possible across the Southern Appalachians
from northeast Georgia into the western Carolinas and from the upper
coast of South Carolina into eastern North Carolina. Additional
rainfall totals of 1 to 2 inches possible across the remainder of
the Southeast into northern Florida.

Flash, urban, and river flooding is possible across the region, with considerable impacts, including landslides, possible across the
southern Appalachians. Significant river flooding across the western
Florida Panhandle will crest today through 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.

TORNADOES: A couple of tornadoes are possible today across eastern
Georgia and the Carolinas.

WIND: Strong wind gusts continue to pose a threat across the
southeastern United States today, including Georgia, the southern
Appalachians, and extending west through much of central and
northern Alabama, Mississippi, and Tennessee. Scattered power
outages and downed trees and powerlines may occur, with the risk
highest in elevated terrain.

SURF: Swells from Isaias will continue to affect much of the
Gulf 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 400 PM CDT.

$$
Forecaster Chenard
NNN
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