Tuesday night’s severe storms spawned a tornado southwest of Iowa City, more than 8 inches of rain covering a roadway in University Heights and 81-mph wind gusts that downed a tree onto the deck of a Williamstown house, according to reports compiled by the National Weather Service.

While much of Eastern Iowa remained under a flood watch as rivers swelled, the Iowa City area was placed under a flash flood warning as the National Weather Service said up to 1.5 inches of rain had fallen in the area in under two hours.

A trained weather spotter reported about 6:30 p.m. that there were 8 to 10 inches of water covering the roadway between West Park Road and Rocky Shore Drive in University Heights.

The weather service said other areas likely to see flash flooding Tuesday night and early Wednesday include Iowa City, Coralville, Kalona, Wellman, Lone Tree, North English, Riverside, Hills, Keswick, South English, Parnell, Millersburg, Harper, Kinross, Richmond, Keota, Webster and Holbrook. The agency said the area includes Interstate 80 mile marker 242 — or the First Avenue interchange in Coralville.

A tornado was spotted about 6 p.m. west of Highway 218, west of Hills and Iowa City. Law enforcement reported the twister, near U.S. 1 and Phebe Lane, was kicking up debris on the cruiser. But there were no reports of damage or injuries Tuesday night.

Shortly before 6 p.m., a trained weather spotter said gusts were measured at 81 mph near Williamstown in Johnson County. The winds downed several large tree branches, snapped others in half, and caused a tree to fall across a deck at a neighbor’s house, the spotter reported.