Isaias Threatens Southeast With Flooding and Tornadoes

Heavy rainfall, damaging wind gusts and possible tornadoes are threatening communities across the southeastern United States as Isaias moves inland through Alabama, Georgia and the Carolinas. The storm has transitioned into a post-tropical system, but its remnants continue to produce dangerous weather, with flooding expected to remain the primary concern throughout Saturday, according to weather.com.

Rainfall forecasts indicate that some locations near the Gulf Coast could receive as much as 15 inches of rain, particularly east of the storm's track, where successive bands of heavy precipitation may persist. Most other Gulf Coast areas are forecast to receive 4 to 8 inches, while much of the remaining Southeast could see 2 to 5 inches, with isolated totals reaching 10 inches.

The flooding threat is expected to shift from Florida's Big Bend toward the southern Appalachians on Saturday. Flash flooding could also affect parts of the Ohio Valley and mid-Atlantic as the system continues northward.

According to weather.com, the storm's transition out of its tropical phase does not eliminate the danger from persistent rainfall. Saturated ground could also make trees more vulnerable to toppling during periods of strong winds, increasing the risk of power outages across affected communities.

Wind gusts could reach 60 mph across eastern Mississippi, Alabama, Georgia and the Smoky Mountains. These conditions could damage trees and disrupt electricity service, with outages potentially lasting several hours or multiple days in areas near the Gulf Coast that experienced hurricane warnings.

A tornado threat also remains across Georgia, the eastern Florida Panhandle and South Carolina through Saturday. The combination of severe storms, heavy rain and strong winds presents multiple hazards as Isaias weakens and travels farther inland.

Weather.com forecasts that Saturday's impacts could affect Memphis, Nashville, Atlanta, Wilmington, Charleston, Tallahassee and Orlando as heavy rainfall and powerful winds spread across the Southeast. Tropical storm warnings remain in effect across much of the Florida Panhandle, southwestern Georgia and most of Alabama, according to the report.

By Sunday, the remnants of Isaias are expected to continue northward, spreading rain into parts of the Great Lakes, mid-Atlantic and Northeast. Forecast locations include Savannah, Nashville, Charlotte, Virginia Beach, Washington, D.C., New York City, Philadelphia, Baltimore, Cincinnati and Detroit.

The storm's initial landfall occurred near Destin, Florida, on Friday evening, when Isaias was a Category 2 hurricane with sustained winds of 105 mph. Weather.com reported that the highest recorded gust reached 116 mph at Santa Rosa Sound, Florida, where sustained winds also reached 91 mph.

Pensacola recorded a wind gust of 102 mph earlier Friday evening, while Gulf Breeze, Florida, registered a gust of 97 mph and sustained winds of 83 mph. These measurements illustrate the strength of the winds accompanying the storm before it moved inland.

Earlier Friday, an instrumented NOAA Saildrone measured a 104-mph gust near Isaias' eyewall at approximately 11 a.m. CDT, according to the National Hurricane Center. Local emergency management officials in Plaquemines Parish reported a 53-mph gust in Venice, Louisiana.

Weather.com advises residents in flood-prone locations to avoid flooded roads and prepare for potential power outages. People in areas vulnerable to storm surge or rainfall flooding should follow evacuation instructions from local officials and remain in safe shelter when conditions deteriorate.