Severe Thunderstorm Warning Issued: Live Radar, Impact Timeline & Emergency Safety Tips

Updated Sunday, September 21 2025 (12:00 UTC) H2: Fast-Moving Front Sparks Multiple Severe Thunderstorm Warnings Across the South A vigorous early-autumn cold front is racing eastward today, triggering clusters of intense thunderstorms from north-central Texas through the Tennessee Valley. As of midday, the National Weather Service (NWS) has posted Severe Thunderstorm Warnings for portions of the Dallas–Fort Worth Metroplex, Huntsville, Alabama, and pockets of the western Carolinas, with the threat zone expected to expand through tonight. H3: What To Expect Where Warnings Are Active • North-Central Texas (DFW): Storms are producing 60–70 mph wind gusts and quarter-size hail. The NWS warns of isolated power outages and tree damage through at least 3 p.m. CDT. • Northern Alabama: Discrete supercells are tracking northeast at 35 mph, capable of 1-inch hail and localized flash flooding. A warning remains in effect for Madison, Limestone, and surrounding counties until 2 p.m. CDT. • Western Carolinas: York County officials relayed an NWS Severe Thunderstorm Warning lasting until 4:45 p.m. EDT, citing the risk of damaging winds, torrential rain, and pea-to-penny-size hail. H3: Timing the Greatest Danger Meteorologists at the NWS Storm Prediction Center anticipate the most widespread severe activity between 3 p.m. and 10 p.m. local time as daytime heating peaks and the leading edge of the front interacts with high humidity. A few storms may briefly spin up weak tornadoes, especially across northern Alabama and central Tennessee. H2: Key Safety Tips 1. Enable Wireless Emergency Alerts on your smartphone to receive real-time warnings. 2. When a Severe Thunderstorm Warning is issued, move indoors immediately; straight-line winds can topple trees just as easily as a weak tornado. 3. Stay away from windows and avoid using wired electronics. 4. If driving, pull over in a safe area; hail and blinding rain can make roads treacherous in seconds. 5. After the storm, watch for downed power lines and report them to local authorities. H2: Travel and Event Impacts Airports in Dallas (DFW, DAL) and Huntsville (HSV) are already reporting ground delays of 30–60 minutes. Outdoor sporting events across the Mid-South could face lightning stoppages late this afternoon. Travelers should monitor airline apps and local forecasts for updated information. H2: When Will the Storms Clear? The front is forecast to reach the southern Appalachians overnight, allowing skies to gradually clear in Texas by dawn Monday. Cooler, less humid air will follow the boundary, providing a brief taste of fall for much of the region. H2: Stay Informed Check the National Weather Service website or NOAA Weather Radio for your specific county’s warnings and follow local emergency managers on social media for hyper-local updates.