A complex of storms is moving across North Texas Monday morning, prompting a First Alert Weather Day. A severe thunderstorm warning is in effect for parts of Johnson, Tarrant, Hill, Ellis and Dallas counties until 6:30 a.m. The storms could bring up to 60 mph winds and quarter-size hail.

At 2:50 p.m. on Sunday, the National Weather Service released a severe thunderstorm warning in effect until 3:30 p.m. for Deschutes County. The storms are expected to bring quarter-sized hail (1 inch) and wind gusts of up to 60 mph.

Lightning strikes the United States about 25 million times a year. Most of the strikes occur in the summer, killing 20 people each year, according to the NWS. Chance of lightning increases as a thunderstorm approaches and peaks when the storm is overhead. It diminishes as the storm moves away.