Below is the annotated record from the Weather Bureau’s Springfield, MO thermograph from November 11, 1911:
The temperature reached a high of 80° then dropped 40° almost instantly and continued to drop until it reached 13° at midnight. In many Midwest and Plains cities, the record high and low on November 11th both occurred on the same day one hundred years ago.
According to the National Weather Service, the front didn’t just bring plunging temperatures,
Impacts from this amazing cold front included a reported 9 tornadoes in Michigan, Illinois, Indiana, and Wisconsin, widespread dust storms in Oklahoma, extensive thunderstorms with straight line wind damage; all followed by near blizzard conditions behind the front. A reported F4 tornado struck the town of Janesville, Wisconsin killing 9 people, only to have blizzard conditions and near zero degree temperatures to follow hours later.
A number of NWS offices have special information about this event. Just click on the city names: