Overview
- Multiple NWS Storm Prediction Center discussions confirmed measured gusts over 90 mph and appreciable damage near Colby, Kansas during the system’s upscale into a cold‑pool‑driven mesoscale convective system.
- The SPC coordinated a series of downstream Severe Thunderstorm and Tornado watches and warned an organized wind swath could produce abundant 60–70 mph gusts with isolated gusts up to 85–100 mph in some corridors.
- High‑precipitation supercells ahead of the MCS produced very large hail, with reports and guidance indicating frequent 1–3 inch stones and the potential for a few exceeding 2 inches in diameter.
- The Weather Prediction Center placed parts of southeastern Nebraska, northeastern Kansas and northwestern Missouri in a Moderate Risk for excessive rainfall, where repeated storms may cause scattered to widespread flash flooding.
- Forecasters say the system will continue eastward through June 23, so residents in the Midwest, Ohio Valley and Mid‑Atlantic should follow local NWS products, expect strong wind and heavy rain, and prepare for power outages and localized flooding.