Post-Tropical Cyclone Isaias Forecast Discussion Number 18

Issued at 1000 PM CDT Sat Oct 10 2026 <pre>000 WTNT44 KWNH 110235 TCDAT4 Post-Tropical Cyclone Isaias Discussion Number 18 NWS Weather Prediction Center College Park MD AL092026 1000 PM CDT Sat Oct 10 2026 Key Messages: 1. Heavy rainfall associated with Post-Tropical Cyclone Isaias will continue across the Southern Appalachians and Southeast tonight. 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, particularly near the southern Appalachians. 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 tonight across eastern Georgia and the Carolinas. FORECAST POSITIONS AND MAX WINDS INIT 11/0300Z 35.0N 86.7W 20 KT 25 MPH...POST-TROPICAL 12H 11/1200Z 36.8N 84.6W 20 KT 25 MPH...POST-TROP/INLAND 24H 12/0000Z 38.5N 80.5W 20 KT 25 MPH...POST-TROP/INLAND 36H 12/1200Z...DISSIPATED $$ Forecaster Roth</pre>

Publication

NHC Atlantic Tropical Cyclone RSS · Port/Shipping/Logistics

Published

11th October 2026

Original report

nhc.noaa.gov

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