Public Tropical Cyclone Advisory
412 WTNT34 KWNH 110833 TCPAT4 BULLETIN Post-Tropical Cyclone Isaias Advisory Number 19 NWS Weather Prediction Center College Park MD AL092026 400 AM CDT Sun Oct 11 2026 ...FLASH FLOODING RISK CONTINUES ALONG BLUE RIDGE AS ISAIAS STARTS ACCELERATION NORTHEASTWARD... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...35.4N 85.9W ABOUT 65 MI...105 KM SE OF NASHVILLE TENNESSEE ABOUT 70 MI...115 KM NE OF HUNTSVILLE ALABAMA MAXIMUM SUSTAINED WINDS...25 MPH...35 KM/H PRESENT MOVEMENT...NE OR 55 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...1010 MB...29.83 INCHES WATCHES AND WARNINGS -------------------- SUMMARY OF WATCHES AND WARNINGS IN EFFECT: Flood Watches are in effect for... * Coastal portions of the Carolinas * Blue Ridge of Central and Southern Appalachians Wind Advisory is in effect for... * Portions of the Southeast and Southern Appalachians DISCUSSION AND OUTLOOK ---------------------- At 400 AM CDT (0900 UTC), the center of Post-Tropical Cyclone Isaias was located near latitude 35.4 North, longitude 85.9 West. The post-tropical cyclone is starting to move toward the northeast and this motion is expected to increase toward 20 mph (32 km/h) and maintain for the remainder of today. Maximum sustained winds are near 25 mph (35 km/h) with higher gusts. Little change in strength is forecast during the next 24 hours. The estimated minimum central pressure is 1010 mb (29.83 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: Rainfall totals of 1 to 3 inches with localized maximum amounts of 5 inches are possible across the Central Appalachians into the Mid-Atlantic. Rainfall totals of 1 inch possible along coastal sections of North Carolina. . Isolated flash, urban flooding possible across the Central Appalachians and Mid-Atlantic.. Significant river flooding across the western Florida Panhandle will crest on Sunday. For a complete depiction of forecast rainfall associated with Isaias, please see the National Weather Service Storm Total Rainfall Graphic available at hurricanes.gov/graphics_at4.shtml?rainqpf and the Flash Flood Risk graphic at hurricanes.gov/graphics_at4.shtml?ero. For a list of rainfall observations (and wind reports) associated with Isaias, see the companion storm summary at WBCSCCNS4 with the WMO header ACUS44 KWBC or at the following link: www.wpc.ncep.noaa.gov/discussions/nfdscc4.html. TORNADOES: A couple of tornadoes are possible today across the Piedmont and Coastal Plain of Virginia and North Carolina. WIND: 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. SURF: Swells from Isaias will continue to affect much of the Gulf and Southeast 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. A depiction of rip current risk for the United States can be found at: hurricanes.gov/graphics_at4.shtml?ripCurrents NEXT ADVISORY ------------- Next complete advisory at 1000 AM CDT.