Post-Tropical Cyclone Isaias Forecast Discussion
Advisory Number: 16
1000 AM CDT Sat Oct 10 2026
000
WTNT44 KWNH 101459
TCDAT4
Post-Tropical Cyclone Isaias Discussion Number 16
NWS Weather Prediction Center College Park MD AL092026
1000 AM CDT Sat Oct 10 2026
Key Messages:
1. Heavy rainfall associated with post-tropical cyclone Isaias will
continue across the Southern Appalachians and Southeast today.
Considerable flash and urban flooding will be possible. Landslides
are also possible across the Southern Appalachians.
2. 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.
3. 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.
4. A couple of tornadoes are possible today across eastern Georgia
and the Carolinas.
FORECAST POSITIONS AND MAX WINDS
INIT 10/1500Z 32.8N 86.8W 30 KT 35 MPH...POST-TROP/INLAND
12H 11/0000Z 34.0N 87.4W 30 KT 35 MPH...POST-TROP/INLAND
24H 11/1200Z 36.7N 85.5W 25 KT 30 MPH...POST-TROP/INLAND
36H 12/0000Z 38.3N 81.0W 20 KT 25 MPH...POST-TROP/INLAND
48H 12/1200Z...DISSIPATED
$$
Forecaster Chenard