Special Weather Statement issued August 20 at 5:51AM CDT by NWS
Effective: 5:51 a.m. on Sunday, Aug. 20, 2017
Expires: 8:30 a.m. on Sunday, Aug. 20, 2017

...Line of Thunderstorms with Gusty Winds...
A complex of showers and thunderstorms will move through
southeastern Iowa this morning. The storms should reach a line
from Sigourney, IA to Memphis, MO between 6 and 7 AM, and
locations along the Mississippi River between 8 and 9 AM.
Lightning strikes, brief heavy rain, and wind gusts of 30-40 mph
are the main threats.

See more at NOAA