A cold front was drifting south and one lone storm developed south of it. Here is the position of the cold front.

The satellite image below shows the lone storm while the rest of the area is sunny to mostly sunny.

One of our Weather Trackers took this photo from near Decorah of  what the storm looked like from the ground.

The radar image below shows how small the storm was.

Keep in mind all the images above were not taken at the exact time but roughly the same time to give you all different perspectives on the storm. As it past over Postville 0.05″ of rain fell.

Here are two satellite images taken one hour apart showing how fast the storm developed. Click on image below to enlarge.

Posted under Update