18-19 June 2001 -- GOES-10 10.7 Micrometer IR Channel

Java applet developed by Tom Whittaker, CIMSS / SSEC

This loop of GOES-10 10.7 micrometer InfraRed (IR) imagery shows the development of convection that produced the tornado that struck Siren, Wisconsin around 01:20 UTC on 19 June (8:20 PM CDT on 18 June) 2001.

An "Enhanced-V" cloud top signature first became evident on the 00:30 UTC GOES-10 IR image, about 34 minutes before the tornado first touched down west of Siren. Hail up to 1.75 inches in diameter was also reported with this cell (at 01:18 UTC, about 5 miles north of Siren). The line of strong convection to the south of the Siren storm produced hail of 4.5 inches in diameter around 01:30 UTC.

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