Overview
- On Sunday the NWS Storm Prediction Center issued a string of Severe Thunderstorm Watches across the central and eastern United States as organized convective systems moved east.
- A large bowing mesoscale convective system in the central Plains produced 50+ knot wind reports and prompted watches as it tracked southeast into north‑central Oklahoma and northwest Arkansas.
- A fast line of storms and embedded supercells produced widespread 50–60 mph gusts and a brief tornado report in Crawford County, Pennsylvania, and forecasters say supercell tornado risk will persist across parts of western and central Pennsylvania for several hours.
- The dominant hazard is damaging straight‑line wind with isolated significant gusts that could reach roughly 65–80 mph, along with pockets of large hail, heavy downpours that can cause flash flooding, and a low probability of a tornado or two.
- Forecasters warn the damaging‑wind threat could continue overnight and that additional watch issuances are possible so millions of people in the watch areas should monitor local warnings and be prepared for power outages and rapid storm impacts.