EF1 tornado in Warren County, Illinois

A short-lived EF-1 tornado developed in Monmouth Illinois and tracked southeast through town for 1.3 miles, with estimated maximum winds of 100 mph. Along the tornado path, structural damage was observed in the heart of Monmouth, with a few buildings seeing roofing damage, many windows blown out, and part of their brick walls damaged. Some houses also saw loss of shingles. Otherwise, a lot of damage was observed to trees along a clear convergent path, with numerous snapped, uprooted, and a lot of trees with downed large branches throughout. Some of these large tree sections were downed on houses as well.

A strong storm system for mid-June brought two rounds of thunderstorm on Wednesday June 17th. The strongest round of storms occurred during the morning hours that brough damaging winds (some significant), heavy rain, and two EF-1 tornadoes in Illinois which occurred in Monmouth and Warsaw.

Many trees fell and power lines were damaged, along with several reports of flash flooding. There were also 4-5 train cars that were pushed off the railroad just south of Monmouth, IL in Warren County due to significant straight-line winds (estimated near 100 mph). Additional train cars derailed as a result of these cars being blown off.