Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. These storms are capable of producing widespread damaging winds and dangerous hail. Tornadoes can develop quickly from severe thunderstorms. Seek shelter immediately in an interior room on the lowest floor of a well-built structure. A Tornado Watch remains in effect until 800 PM MDT Sunday for a portion of northeast Colorado.

At 513 PM MDT, severe thunderstorms were located along a line from 6 miles southeast of Twin Buttes to 7 miles north of Venango, or along a line from 19 miles southwest of Chappell to 14 miles south of Big Springs, moving north at 30 mph. HAZARD...Golf ball size hail and 70 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. Locations impacted include... Julesburg, Ovid, Sedgwick, Sixteen-Mile Corner and Marks Butte.