Hold the left mouse button down as you drag the slider above the image (or use the arrow buttons) to fade between the GOES-8 visible image and the corresponding 10.7 micrometer IR image at 01:15 UTC on 19 June (8:15 PM CDT on 18 June) 2001. To zoom, click on the "Zoom" button, and then click the "hand" cursor on the image where you want to center the zoom.

A tornado struck the town of Siren, Wisconsin (station identifier KRZN) around 01:20 UTC (8:20 PM CDT), producing F3 damage over a 1/2 mile wide path.