Issued at 400 AM CDT Sun Oct 11 2026
000 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 $$ Forecaster Gallina
