From the National Weather Service archives:
On August 9th, 1992 a tornado packing winds estimated between 113 and 157 miles an hour did major damage to the town of Chester (in Lake county). Shortly after 7 pm CDT a tornado tore right through the heart of Chester causing considerable damage. Four businesses were destroyed, three others had major damage, and five had minor damage. An elevator and new grain bin were leveled and another bin was heavily damaged. Most of the building housing the fire department was demolished. Also many houses and vehicles sustained damage and large trees were uprooted or broken off. In one instance a steel beam was thrust through a garage and into the car inside. One mile north of Chester an entire house was moved off of it's foundation.
The town had to be evacuated for 19 hours after the tornado because the tornado damaged a 12,000 gallon ammonia tank releasing 4,000 gallons of the liquid gas into the air. The ammonia was a health hazard forcing residents out. To the south of Chester the storm destroyed a new convenience store and blew two fuel tanks over 100 yards

View more history for Post 136 in Chester, SD, South Dakota