Showers and thunderstorms developed late in the day on Aug 27th in northeast Missouri and spread into southeast Iowa and far western Illinois into the evening. Large hail fell for nearly one half hour straight in Rutledge, MO, including as large as golf ball size.
A pronounced downburst (sudden rush of wind under and near a thunderstorm) caused widespread damage in Burlington, IA knocking down trees, limbs, and powerlines. Five homes had holes in the roofs due to falling limbs. A commercial storage building and another large outbuilding had their roofs peeled back, consistent with wind estimates of 70 to 80 MPH.
Rainfall totals of 2 to 4 inches were observed in parts of northeast Missouri and southeast Iowa.
Oppressive heat and humidity that began on the 26th and persisted into the 27th helped spawn these storms. Both Dubuque (tied) and Moline (exceeded) daily record highs on the 27th, with Moline reaching 98° and Dubuque 94°.
Heat Records and Facts
Moline, IL:
- Record daily high reached on August 27th of 98°, breaking the old record of 97° set in 1976.
- The 98° was the warmest high temperature in just over a year (100° on August 24, 2023)
- This was the latest 98° in a calendar year since September 9, 2013.
- Record daily warm low tied on August 26th of 75°, tying 1983.
Dubuque, IA:
- Record daily high tied on August 27th of 94°, tying 1895.
- This was the latest 94°+ for Dubuque since September 9, 2013.
Area-wide:
- Dew point values were in the mid 70s to as high as 80°!
***Courtesy of the National Weather Service***
