000
WTNT34 KWNH 110237
TCPAT4
BULLETIN: Post-Tropical Cyclone Isaias Advisory Number 18
NWS Weather Prediction Center College Park MD AL092026
1000 PM CDT Saturday October 10, 2026
...BULLETIN: Flood threat continues with Isaias as it moves toward
Tennessee...
SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
LOCATION...35.0N 86.7W
ABOUT 75 MILES...120 KM W OF NASHVILLE TENNESSEE
ABOUT 405 MI...655 KM WSW OF ROANOKE VIRGINIA
MAXIMUM SUSTAINED WINDS...25 MPH...35 KM/H
PRESENT MOVEMENT...NNE OR 40 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES
WATCHES AND WARNINGS
Summary of watches and warnings in effect:
Flood watches in effect for...
* Parts of the southeastern United States
* Southern Appalachians
High wind warning in effect for...
* PARTS OF THE SOUTHERN APPALACHIANS
Wind advisory in effect for...
* DISCUSSION AND 48-HOUR OUTLOOK
At 1000 PM CDT (0300 UTC), the center of Post-Tropical Cyclone
Isaias was located near latitude 35.0 North, longitude 86.7 West.
The post-tropical cyclone is moving toward the north-northeast near 16 mph
(26 km/h) and this motion is expected to continue on Sunday.
Maximum sustained winds are near 25 mph (35 km/h) with higher gusts.
Little change in strength is expected during the next 24-36 hours
before the cyclone is absorbed by another low pressure system to
its east.
The estimated minimum central pressure is 1009 mb (29.80 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: Additional rainfall amounts of 2 to 5 inches with
isolated maximum amounts of 10 inches are possible across
the southern Appalachians from western North Carolina into western Virginia. Additional rainfall amounts of 1 to 2 inches
are possible across the Florida Big Bend and northwest Florida bringing
storm totals to near 12 inches. Rainfall amounts of 2 to 4 inches
with isolated maximum amounts of 6 inches are possible near
the Carolina coasts.
BULLETIN: , Urban and river flooding is possible across the region, with
significant impacts, including landslides, possible across the area
Southern Appalachians. Significant river flooding across the west
Florida Panhandle will evolve today through Sunday.
For a full description of rain forecast related to
Isaias, please consult the National Weather Service storm
Graphics available at
hurricanes.gov/graphics_at4.shtml?rainqpf and the bulletin: Flood hazard
Graphics at hurricanes.gov/graphics_at4.shtml?ero.
TORNADOES: A few tornadoes are possible tonight across the east
Georgia and the Carolinas. Wind: Strong wind gusts continue to pose a threat across the area
Southeastern United States today, especially near the South
Appalachians. Scattered power outages and fallen trees and
Power lines may occur, with the risk being highest in high terrain.
SURF: Waves from Isaias will continue to affect much of the area
Gulf coasts of the United States, Mexico and western Cuba this
weekend. These swells can cause life-threatening surf and
rip current conditions. Please consult products from your local
weather office.
A description of the rip risk for the United States can be found
at: hurricanes.gov/graphics_at4.shtml?ripCurrents
The next advisory
The next advisory will be at 400 AM CDT.
Prophet Roth