Johnson storm history

Iowa State Patrol responded to a crash due to ice-covered roads, caused by overnight freezing fog and drizzle. A semi truck driver lost control of their vehicle and jackknifed on Interstate 80, which led to two fatalities and several injuries. Total number of injuries are unknown…

Low temperatures at the Iowa City Airport ASOS on the 30th and 31st were -26 and -29 Fahrenheit. The coldest wind chill during this period were -51 at 411 AM.

Low temperatures at the Iowa City Airport ASOS on the 30th and 31st were -26 and -29 Fahrenheit. The coldest wind chill during this period were -51 at 411 AM.

Wind gusts estimated to be 75 mph blew down numerous trees at Lake McBride State Park about 4 miles west southwest of Solon, IA at 940 am CDT May 29. One tree fell onto a tent, killing a camper.

The Emergency Manager reported that the Cedar Rapids and Iowa City Railroad (CRANDIC) experienced washed out tracks and a bridge in the Swisher area.

The record crest on the Iowa River at Iowa City occurred on June 15, 2008 at 31.53 feet. Flood stage is 22 feet. The record crest on the Iowa River at Lone Tree occurred on June 15, 2008 at 23.15 feet. Flood stage is 15 feet. Preliminary damage estimates just to the University of…

A 15 minute "rain" of baseball sized hail caused $30 to $50 million dollars of damage. One insurance agent said "this was the worst storm since 1967." He went on to say; "everyone he insures who has a skylight now has a broken skylight." This included the skylights over the swimm…

The COOP Observer in Iowa City reported 9.0 inches. Trained spotter reports ranged from 9.0 inches 1 mile west of Cou Falls to 10.5 inches 1 mile west of Elmira.

A large downed tree approx. 2-2.5 ft diameter across.

Large tree limbs were blown down along nearby roadways.

A large tree was downed, approx 1.5 feet diameter on Melrose Avenue.

Iowa City Airport.

Many tree branches ranging in sizes up to six inches in diameter down.

A trained spotter report that there was a 6 to 8 inch tree trunk snapped by thunderstorm winds.

Trained spotters reported 6 to 9 inches of snow, with widespread snow covered roads.

Trained spotters and DOT reported widespread slick conditions with a 0.2 to 0.5 of an inch of ice accumulation on the ground and elevated surfaces.

A trained spotter reported an estimated thunderstorm wind gust of 70 MPH.

A public report of a tree blown down. The time of the event was estimated using radar.

A public report of a tree blown down in North Liberty. The time of the event was estimated using radar.

A public report of a 58 MPH thunderstorm wind gust.

A public report of thunderstorm wind damage.

Dispatch Center reported knee depth water on 20th Avenue. The time of the event was estimated using radar.

Dispatch Center reported knee deep water on Johnson Street in downtown Iowa City. The time of the event was estimated using radar.

A public report of street flooding.

A trained spotter reported around 8 to 10 inches of water completely covering the roadway between West Park Road and Rocky Shore Drive.

A public report via social media of roadway inundated with water as well as flood waters up against a few homes.

A trained spotter reported an estimated 60 MPH wind gust.

A trained spotter reported a measured 70 knot gust on a David Weather Station.

A trained spotter reported a large tree branches downed by the winds, with some trees snapped in half, one tree fell on their neighbors house, damaging the deck.

A public report that 2 fruit trees were blown over and another large tree was split. The time of the event was estimated using radar.

An NWS Storm Survey team found that there was isolated tree damage at this location consistent with straightline winds of 80 MPH or stronger but no observed path of damage.

Time estimated by radar.