National Weather Service United States Department of Commerce

Overview

At 8:06 pm on June 18th, 2001, an F3 tornado touched down 2 miles east-northeast of Grantsburg, Wisconsin. The tornado continued east through the towns of Alpha, Falun, and eventually Siren around 820 pm. The tornado continued to travel east to 14 miles east of Siren. The most extensive damage was in a 6 block wide area in Siren, where numerous homes were leveled. There was also extensive structural damage to many buildings. The average width of the tornado was 1/8 to 1/4 mile, with the widest width being about a half mile. Preliminary indications are that the path length of the tornado was about 27 miles. Two people died as a direct result of the tornado, with another person killed indirectly after the tornado. In all, there were 16 injuries as a result of the tornado.

The National Weather Service issued a tornado warning well ahead of time, with 35 minutes of lead time before it first touched down, and 50 minutes of lead time before it moved through Siren. The National Weather Service works closely with the local law enforcement, SKYWARN and Ham Radio Networks to reduce the loss of life and property during severe weather. It was this cooperation that helped us to reduce the loss of life with this tornado.

Despite the long lead time ahead of the tornado striking Siren, many did not receive the warning. Weather Radio coverage was very weak in Siren and in many cases did not activate the alert feature on the radios as a result. So, most people did not have one. Second, the power went out in Siren 20 minutes before the tornado hit, rendering TVs and radios useless for disseminating the warning. Finally, the tornado siren in town had been struck by lightning in late April or may, rendering it inoperable. It was scheduled to be repaired the week after the tornado hit. Some were able to get the warning over fire pagers or calls from family, but most relied upon the tornado siren which did not sound. Credit goes to the Siren Police for spreading the warning through town ahead of the tornado.

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Image Obtained by KSTP-TV - source unknown

 

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Image Obtained by KSTP-TV - source unknown

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