2/24/2024 0 Comments John deere quad cities airport![]() marking where the strongest winds were occurring.Ĭorresponding 0.5 degree base velocity image from KDVN at 1009z (509 A.M. Notice the bowing segment from near Hills southward to Washington. CDT) showing derecho moving through eastern Iowa. CDT).Ġ.5 degree base reflectivity image from KDVN at 1009z (509 A.M. 0.5 degree base reflectivity image from KDVN at 0926z (426 A.M. Note the additional storms, some severe, developing out ahead through central Iowa.ĭestructive, long-lived windstorm (derecho) moving out of central Iowa into eastern Iowa. Main complex of storms moving through northwest Iowa prior to 1 am. Hail is in green (diameter in inches) and wind is in orange (gust in knots). ![]() This image shows the swath of damage reports. This type of long lived and destructive wind storm is referred to as a derecho. These extreme winds produced a large swath of wind damage 20 to 40 miles wide comprised largely of downed trees and power lines. Power was knocked out to over 130,000 residents in the Quad Cities. Other measured wind gusts included 84 mph in Princeton, IL and 72 mph in Mount Pleasant, IA. The highest measured wind gust was 94 mph in Moline, IL. As the severe thunderstorms continued moving southeast they further intensified and produced widespread and destructive straight-line winds of 60 to 90 mph through east central into southeast Iowa, and northwest into central Illinois. ![]() The severe thunderstorms moved into northwest Iowa very early Monday morning (July 21, 2008). The storms became severe while shifting east through northern Nebraska Sunday evening. A complex of thunderstorms developed over portions of Wyoming Sunday afternoon (July 20, 2008).
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