Severe Thunderstorm Watch: Damaging Winds & Large Hail Threaten the Midwest Tonight

Meteorologists at the National Weather Service Storm Prediction Center (SPC) have placed a large swath of the central United States under multiple Severe Thunderstorm Watches this Tuesday, May 19, 2026, as a potent spring storm system sweeps from the Plains into the Great Lakes. Watch 229 covers much of central Kansas and western Missouri through 7 a.m. CDT, while Watch 230 blankets southeast Michigan—including Detroit, Ann Arbor and Flint—through 9 p.m. EDT. Key hazards • Damaging straight-line winds up to 70 mph capable of downing trees and power lines • Large hail to the size of golf balls, especially in Kansas, Missouri and northern Indiana • A few brief tornadoes possible where storms rotate along the warm front • Torrential rain producing localized flash flooding in low-lying or urban areas What’s driving the outbreak A fast-moving upper-level trough is colliding with tropical-level humidity pushing north from the Gulf of Mexico. Daytime heating is helping CAPE values surge past 2,000 J/kg, while 40–50 kt mid-level winds are creating ample shear for organized supercells and bowing line segments. As the low tracks toward Lake Huron tonight, the severe threat will arc east into Ohio, Pennsylvania and western New York. Timing and regional impacts • Early morning: Storm complexes exit central Kansas but may still pack hail and 60 mph gusts in Kansas City and Springfield, MO. • Mid-afternoon: Discrete supercells form along an outflow boundary from Toledo, OH, to Fort Wayne, IN, posing the day’s highest hail and tornado risk. • Evening commute: A squall line races across Detroit, Lansing and Saginaw with widespread 60–70 mph winds and embedded spin-ups, potentially leading to scattered power outages and travel delays. Safety checklist 1. Enable Wireless Emergency Alerts and keep a NOAA Weather Radio nearby. 2. Secure outdoor furniture, grills and trampolines ahead of the strongest winds. 3. Park vehicles in a garage or under sturdy shelter to avoid hail damage. 4. During a warning, move to a basement or interior room on the lowest floor, away from windows. 5. Never drive through flooded roadways—“Turn Around, Don’t Drown.” Severe weather will ease overnight as the front slides into the Appalachians, but additional watches may be needed Wednesday from the Mid-Atlantic to New England. Stay tuned to local NWS offices and trusted media for rapid updates as conditions evolve.