(- Fade between GOES-8 visible and IR images at 01:15 UTC-) NOAA
GOES-8 visible and InfraRed (IR) imagery (above) shows the
development of convection which spawned a tornado that struck
the town of Siren, Wisconsin (station identifier KRZN) around
01:20 UTC on 19 June (8:20 PM CDT on 18 June) 2001. This tornado
was responsible for 3 deaths and 16 injuries, and produced F3
damage along a 1/2 mile wide path in the town of Siren. A
Landsat-7 image of the tornado damage path the following morning
is available from the Environmental Remote Sensing Center,
University of Wisconsin-Madison, and the damage path was still
evident 2 weeks later on MODIS imagery. Additional information
and damage photos are available from the Duluth, Minnesota
National Weather Service office. As the convection developed,
visible imagery indicated several overshooting cloud tops (note
the shadowing and texture), where strong sustained updrafts were
present. An "Enhanced-V" cloud top signature first became
evident on the 00:45 UTC GOES-8 I