Tropical Cyclone Discussion

416
WTNT44 KWNH 110834
TCDAT4
 
Post-Tropical Cyclone Isaias Discussion Number  19
NWS Weather Prediction Center College Park MD   AL092026
400 AM CDT Sun Oct 11 2026
 
Key Messages:
 
1. Heavy rainfall associated with Post-Tropical Cyclone Isaias will 
spread into the Central Appalachians and Mid-Atlantic on Sunday.  
Isolated flash and urban flooding will be possible.
 
2. 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.
 
3. Swells from Isaias will continue to affect much of the Gulf and 
Southeastern Atlantic 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 the Piedmont and 
Coastal Plain of Virginia and North Carolina.
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  11/0900Z 35.4N  85.9W   20 KT  25 MPH...POST-TROPICAL
 12H  11/1800Z 37.1N  82.8W   20 KT  25 MPH...POST-TROP/INLAND
 24H  12/0600Z 38.4N  77.7W   20 KT  25 MPH...POST-TROP/INLAND
 36H  12/1800Z...DISSIPATED