A derecho has been racing across Iowa and will continue moving east thru N. Illnois. GUST TO 127 mph!!! Significant damage has occurred. Roofs have been blown off, vehicles flipped on highways. Gusts have been measured as high as 106 mph (at Le Grand, Iowa). A gust to 99 mph was measured at Albion, Iowa, 95 mph at Marshalltown, Iowa, 90 mph at Chelsea. Omaha had a gust to 65 mph.
This area of storms will move through N. Illinois. In advance of the line, a Severe Thunderstorm Watch has been issued for N. Illinois, extreme S. Wisconsin and western Lake Michigan!
Effective this Monday morning and evening from 1125 AM until 700 PM CDT. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... * Primary threats include... Widespread damaging winds and scattered significant gusts to 100 mph likely Isolated large hail events to 1.5 inches in diameter possible A couple tornadoes possible SUMMARY...A derecho will rapidly progress across eastern Iowa and northern Illinois this afternoon. Widespread severe wind gusts, some of which should reach 80-100 mph are anticipated along the track of the bow. Brief tornadoes are also possible.
Severe Thunderstorm Watch for E. Wisconsin and part of Upper Michigan. SPC says:
* Effective this Monday afternoon and evening from 100 PM until 700 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible
Here’s storm reports:
Roof partially off the Buccaneers Arena at Urbandale IA. There are counties in Iowa where +95% of the county is without power. Millions of acres of corn has been blown down!