![]() ![]() The Cedar Rapids area was particularly hard hit. The most extreme winds, estimated at 110-140 mph, destroyed or damaged numerous outbuildings, barns, grain bins, homes, mobile homes, apartment buildings, trees, and power poles in parts of Benton, Linn, Jones, Cedar, and Clinton Counties. At this point, storms began to tap into an extremely unstable environment, and began producing more widespread wind damage as they tracked through eastern Iowa. Storms quickly became severe in western Iowa, and produced damaging winds near and around the Des Moines metro. ![]() Storms initially developed in northern Nebraska and southeast South Dakota early in the morning, and quickly intensified as they moved eastward into Iowa. There were numerous injuries reported, especially in the Cedar Rapids area. The Linn County Sheriff's Department reports a bicyclist died after being struck by a falling tree. One storm-related fatality occurred in the NWS Quad Cities area of responsibility. Many locations experienced sustained high winds and damaging gusts for 30 to 60 minutes, compared to 10 to 20 minutes, which is more common for derechos. What is unique about this event, making it even more extreme, is the long duration of the high winds. Two tornadoes were also confirmed within the widespread swath of wind damage, Both have been designated as EF-U (unknown), as there was no observable damage directly attributable to the tornadoes from which an EF-scale rating could be assigned.Ī derecho of this intensity is a roughly once-in-a-decade occurrence in this region. The maximum measured unofficial wind gust was 126 mph at Atkins, Iowa in Benton County. Maximum estimated winds were around 140 mph, which caused extensive damage to an apartment complex in southwest Cedar Rapids, IA. A swath of damage from Benton County, through portions of Linn, Jones, Cedar, and Clinton Counties, is consistent with intermittent straight line winds in the 100-130 mph range. Besides this, the weekend appears to have near normal temperatures in the low/mid 80s.A powerful line of severe thunderstorms known as a " Derecho" tracked across eastern Iowa and northwest Illinois on the afternoon of Monday, August 10th resulting in widespread straight line wind damage. Since we are still several days out, it is hard to pinpoint what might actually happen and it's way to early to discuss any severe potential. NEXT WEEKEND Some trends are showing more chances for rain for the weekend. ![]() It will certainly be warmer than the start of the week, but nothing like way we saw last week. Highs will move back into the upper 80s and lower 90s along with more humidity. Temperatures will also be on the rise during this time. No widespread rain is expected and we are not looking at severe weather. Scattered showers are possible Tuesday evening into Wednesday. MIDDLE//END OF WEEK The increase in moisture will lead to an increase chance in seeing some rain chances. This will be bringing in warmer temperatures and more moisture into the area leading to an uptick in humidity for the middle/end of the week. High pressure will move off to the east over the great lakes making our winds a bit more southerly. TUESDAY As the week progresses an upper level ridge will begin pushing eastward bringing warmer temperatures back to the area. Some cloud cover is possible still with overall lower humidity. MONDAY High pressure in place will help keep things comfortable throughout the day. Tonight: Some clouds, mild Temp: 59-63 Wind: NE 5-10 mphĬomfortable weather to start the week before more rain chances and warmer/humid conditions return Today: Partly sunny, warm but comfortable Temp: 82-87 Wind: S 5-10 mph ![]()
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