TL;DR

The Storm Prediction Center has issued a Slight Risk for northern Florida, southeast Alabama, and southwest Georgia today as Hurricane Isaias approaches the Florida Panhandle. Rotating storms capable of producing tornadoes will become increasingly likely this afternoon and continue through tonight, especially across the Panhandle and adjacent areas. Residents should monitor warnings closely and have multiple ways to receive alerts.

Hurricane Isaias drives today's severe weather setup

Friday's severe weather threat is entirely tied to Hurricane Isaias, which continues to strengthen as it tracks north-northeastward toward the Florida Panhandle and far southern Alabama. According to the NOAA Storm Prediction Center (SPC) Day 1 Convective Outlook issued at 0757 AM CDT, "tornado potential will steadily increase this afternoon and continue tonight, especially across the Florida Panhandle into southeast Alabama and southwest Georgia."

This is a classic tropical tornado scenario. As Isaias approaches, its eastern-peripheral rainbands will spread northward across the region, bringing maritime air and destabilization to coastal areas. At the same time, low-level wind shear and storm-relative helicity will significantly strengthen, creating an environment favorable for rotating supercells embedded within the broader rainband structure.

The National Hurricane Center is the authoritative source for Isaias's track and intensity forecast. For severe weather implications, SPC notes that "destabilization will tend to be maximized in coastal areas on its eastern periphery, all while low-level winds/SRH significantly strengthen over time."

Where is the highest risk today?

The Slight Risk area covers:

  • Northern Florida, including the Panhandle and coastal bend
  • Southeast Alabama
  • Southwest Georgia

Cities in or near the Slight Risk zone include Tallahassee, Panama City, Dothan, and Valdosta. SPC specifically highlights the Florida Panhandle as the area with the greatest tornado potential.

Outside the Slight Risk, a broader Marginal Risk extends across additional portions of the Southeast where isolated severe storms remain possible but are less organized.

What hazards are expected?

Tornadoes are the primary concern. SPC writes that "rotating storms will have the potential to produce tornadoes, particularly across the Florida Panhandle/nearby northern Florida into southeast Alabama and far southern Georgia." Tropical tornadoes often form quickly with little advance notice, spin up in rainbands that may not look particularly threatening on radar, and can occur at any time of day or night.

Damaging winds are also possible, especially across southern Alabama near the evolving inverted surface trough late this afternoon into tonight. SPC notes "some enhancement to the wind field, potentially including a convective influence" in that area.

Hail is not a significant threat with this setup. Tropical environments typically lack the mid-level dry air and strong updrafts needed to grow large hail.

When will storms arrive?

Timing varies by location, but the overall window runs from this afternoon through tonight.

  • This afternoon: Eastern-peripheral rainbands begin spreading northward, potentially reaching the near-coastal western Peninsula and more broadly into the Florida coastal bend.
  • Late afternoon into tonight: Coverage and intensity increase across the Florida Panhandle, far southern Alabama, and southern Georgia as Isaias continues its approach and the maritime warm front advances eastward.

Residents should not wait for a specific time. Tropical tornado threats can persist for many hours, and individual storms may develop rapidly within the broader rainband structure.

Yesterday's severe weather: hail in Iowa and South Dakota

While today's focus is on the Southeast, yesterday brought a different kind of severe weather to the Upper Midwest. Sixteen hail reports came in from Iowa and South Dakota, with sizes ranging from quarter-sized (1.00 inch) to ping pong ball-sized (1.50 inches).

The largest hail—1.50 inches—was reported in multiple Iowa communities including Panora, Ireton, Cherokee, and Breda, as well as Beresford and Alcester in South Dakota. No tornadoes or damaging wind events were reported. The storms moved through during the overnight hours, with most reports clustering between 02Z and 07Z.

How to stay safe during a tropical tornado threat

Tropical tornadoes present unique challenges. They often form in the outer rainbands of a hurricane or tropical storm, sometimes hundreds of miles from the center. Because they develop in already-stormy conditions, it can be difficult to distinguish a tornadic storm from the surrounding rain.

Have multiple ways to receive warnings. A NOAA Weather Radio, a smartphone weather app, and local television or radio all provide redundancy. Wireless Emergency Alerts for tornado warnings will sound on your phone even if it's on silent mode, though third-party weather apps are silenced by Do Not Disturb unless you adjust settings.

Do not rely on outdoor sirens. Sirens are designed to alert people outdoors, not inside homes or buildings. Heavy rain and wind from Isaias will further reduce their audibility.

Know your safe place. The lowest floor of a sturdy building, away from windows, is best. Interior rooms like bathrooms or closets offer additional protection. Mobile homes and vehicles are not safe during a tornado.

Act immediately on warnings. Tropical tornadoes can touch down with little lead time. When a Tornado Warning is issued for your area, move to your safe place without delay.

What about tomorrow?

SPC's Day 2 Convective Outlook maintains a Slight Risk across portions of Georgia and Florida as Isaias continues to move inland and northeastward. The tornado threat will gradually shift northward and eastward with the storm system, though intensity may decrease as Isaias weakens over land.

By Day 3 (Sunday), the severe weather threat drops to Marginal across the Carolinas and Mid-Atlantic as the remnants of Isaias continue tracking up the coast. A separate Marginal Risk appears over Colorado tied to a different weather system.

Residents along the Southeast and Mid-Atlantic coasts should continue monitoring forecasts through the weekend as the situation evolves.

VORTEX is a free web app at vortexintel.app that monitors severe weather nationwide. Pro ($4.99/month) places phone calls to your phone when a tornado or flash flood warning is issued for a location you care about — calls can ring through Do Not Disturb once you enable Emergency Bypass for the number, unlike most third-party app notifications.