The last 12 hours were intense! Tornados can be “a possible byproduct” of derechos, according to Eric Lenning, a meteorologist at the National Weather Service in Chicago. The August 2020 Midwest derecho was a severe weather event which took place from August 10–11, 2020 across the Midwestern United States. Items of Interest 45 Halloween Costume Ideas for Best Friends. Daily Temp/Precip Maps Primarily seen in the central and eastern United States, these unusual storms create walls of wind that streak for hundreds of miles at high speeds. Millions of people from the upper Midwest to along the Atlantic coast were heavily impacted throughout the day by a storm complex that initiated from a subtle disturbance in the upper level flow over northwest Iowa. The storms, known collectively as a derecho (pronounced deh-REY-cho), also flooded parts of Marshalltown, knocked down power lines and trees and caused gas leaks, Mr. Greer said. Cars fleeing a derecho on May 30, 2012. Roof damage to homes and buildings was reported in several Iowa cities, including the roof of a hockey arena in Des Moines. While a derecho can produce destruction similar to a tornado (or even a hurricane), the NWS says that the storm will only show damage sweeping from one direction in a straight path, hence why crops could be seen folded and flatted to one side. Photo taken by Doug Berry of the very impressive shelf cloud on the leading edge of the "People Chaser" Derecho of May 27, 2001 near Fort Supply, Oklahoma. Science and Technology Tropical Storm #Elida also strengthened into a #hurricane off the west coast of Mexico. Iowa record of 140 miles-per-hour wind gusts, Your California Privacy Rights/Privacy Policy. Prevention participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites. Please select one of the following: Experimental Graphical Hazardous Weather Outlook, National Oceanic and Atmospheric Administration. Drone video: Derecho damage at Indian Creek Nature Center in Cedar Rapids. The Aug. 10 storm, which hit Iowa the hardest and also impacted Illinois, Ohio, Minnesota and Indiana, was the most costly thunderstorm in U.S. history, the Washington Post says. “Make preparations NOW, don’t wait for the storms to arrive.”. What happened Monday morning was the result of unstable, very moist air that had parked for days over the northern Plains — culminating  in a derecho. While the area is accustomed to some unruly weather, this was no tornado. It's estimated that August's multi-state derecho — which has left wide swathes of Iowa devastated — resulted in $7.5 billion in damages and counting, according to updated data from the National Oceanic and Atmospheric Administration. Although a derecho can produce destruction similar to the strength of tornadoes, the damage typically is directed in one direction along a relatively straight swath. This calls for both hot and humid air mixed with dangerously strong winds. Kim Reynolds estimated that Iowa's agriculture industry experienced about a $3.8 billion hit. Thousands of homes, trees, and powerlines were damaged and even destroyed in some cases. “This is an extremely dangerous line of storms. Below is an example of damaging wind reports left behind by the June 29, 2012 derecho that swept from the upper Midwest to the central Atlantic coast in a matter of hours. “We’re in life-saving mode right now.”. 1-Stop Drought Many times, the best overlap of stronger winds aloft and hot and muggy conditions are in an area where the atmosphere is "capped" (a thin layer of warmer air in the low to mid levels that can inhibit upward vertical motion needed for thunderstorm updrafts). The storms, known collectively as a derecho (pronounced deh-REY-cho), also flooded parts of Marshalltown, knocked down power lines and trees and caused gas leaks, Mr. Greer said. As the cool, dense air spreads outward, it forces the lighter, warm and moist air surrounding the storm up along the leading edge of the outflow, or gust front (see figure below, with mean flow assumed to be from left to right). After blitzing Chicago, the storm moved east, and a severe thunderstorm watch covered much of southwestern Michigan and northern Indiana until midnight. This story has been shared 138,568 times. Do Not Sell My Personal Information, Your California Privacy Rights While Mr. Renstrom, 40, said the damage to his home was limited to a few loosened shingles on the roof, his neighbors were not as lucky. Just over three dozen locations had wind gusts over 74 mph, mostly in Iowa and northern Illinois. Tyler Lariviere/Chicago Sun-Times, via Associated Press. Meghan McCain Shares Sweet Tribute to Sunny Hostin, Everyone Missed This “Hocus Pocus” Easter Egg, Pope Francis Publicly Supports Queer Civil Unions, Lindsey Vonn Shares Body Positive Response to Hate. Damage from a derecho can cover hundreds of miles. Half a million Iowans lost power in the aftermath of the August wind storm. KY Mesonet, Latest Forecasts New information has been updated in the About section. Text Products Then the cold, dense air hits the ground and spreads out, he said. Although derechos are extremely rare west of the Great Plains, isolated derechos have occurred over interior portions of the western United States, especially during spring and early summer. Decision Support Page Derechos are formed when warm, humid air rises into the atmosphere and mixes with cooler, denser air before returning to the surface, he said. In some areas, it took weeks for power to be restored. In some cases, power line poles were snapped off. Therefore, a progressive derecho can quickly develop with very little warning. Station History NOAA's Storm Prediction Center says the derecho tracked about 770 miles in 14 hours. "If you were looking to exert the most damage on corn crops when it comes to thunderstorms and heavy winds, when the derecho rolled through in August, it was the perfect time to do it," Curtis continued. As Chicago recovered from its depressing night of looting, residents were warned by the National Weather Service of winds of 80 to 90 mph. Hourly Observations Fort Knox “It hit us at a time when we were just getting back on our feet,” Mr. Greer said. Weather Stories 1-Stop Severe Forecast Hazardous Weather Outlook Winds of 100 mph can stretch for “20, 30, 40 or God forbid, 100 miles,” he said. Given all of the damage recorded so far, the $7.5 billion cost is not unexpected for experts. Terms of Use Below is an image depicting favorable weather patterns for derecho formation. Tornado Machine Plans, Weather Safety Local Climate Page At this point, widespread and persistent wind damage has been occurring for a prolonged period of time. Derechos occur a couple of times a year across the United States, but most do not usually produce wind speeds near 100 m.p.h., Mr. Marsh said. For more information and acknowledgements go to the Storm Prediction Center's About Derechos page. Why trust us? Local Climate Pages A derecho often causes more damage than even a tornado because it can hover in one place and its high winds can affect a far larger area, Marsh said. Multiple locations were found. Very high winds. His electric provider, Alliant Energy, estimated that his power would be out for two days. The other 30% occur during the cool season. Hi Chuck, I wanted to come back to this to point out this map that shows derecho climatology across the United States. “It was a big front that went all the way through the state.”. A progressive derecho needs a very unstable (hot and moist) environment with relatively strong winds aloft. An unusually powerful storm ripped through several Midwestern states on Monday. Climate Prediction The extensive damage was caused by the derecho, which is a line of severe thunderstorms that produce high winds. Derechos in the United States most commonly occur along two axes. Beyond that, NOAA's data says it is the fourth-most expensive severe storm since 1980, and the second-costliest disaster so far in 2020. DES MOINES, Iowa -- Damage estimates from a rare wind storm that slammed Iowa and some other parts of the Midwest in August are growing, with the total now at $7.5 billion, according to a new report. COVID-19 mitigation restrictions announced for suburban Cook Co. Preckwinkle launches COVID-19 relief cash assistance program, Waukegan mayor planning to release police shooting video, Fall activities that put you at high risk of COVID-19 transmission, 1 killed, 17 injured in Hancock County, IL hayride accident, Senate poised to confirm Barrett, Dems powerless to block, Black-owned business makes heart healthy salad dressing, Expert argues US should consider national mask mandate, 1st trace snow of season falls in Chicago area, Chicago Weather: Patchy rain, cloudy Monday, Exclusive: Juice WRLD's mom speaks out for 1st time since rapper's death, What's a derecho? Because the overall motion of a derecho-producing convective system is a combination of (1) advection (the movement of individual storm cells by the environmental wind outside the storms), and (2) propagation (the development of new storm cells relative to older ones), spatial and/or temporal changes in the environmental wind add further complexity to the forecasting of derecho tracks. NWS https://t.co/KjSp7OwIGR pic.twitter.com/XOwSYVXfqo, Trees down in Hinsdale as wickedly strong storms pushed through the area at 3:45pm. The storms hit parts of Iowa and eastern Nebraska on Monday morning before they surged through northern Illinois and began heading across Lake Michigan and northern Indiana later in the day, the National Oceanic and Atmospheric Administration said in a statement. So what do they look like when they form in the sky? You may be able to find the same content in another format, or you may be able to find more information, at their web site. “Once they get going like they did across Iowa, it’s really hard to stop these suckers.”. The August derecho grew from a cluster of thunderstorms ranging from southeast South Dakota to Ohio. “We’ve had derechos that start in the Chicago area and hit Washington, D.C.,” he said. That's because derecho winds are straight-lined and generally move in one direction. Central U.S. Randy Renstrom of Grinnell, Iowa, said there was extensive damage to houses and businesses in that city, which is about 55 miles east of Des Moines. A derecho is linked to a group of thunderstorms that form bow echos, which come together with strong winds and spread in a horizontal direction. Allan Curtis, a meteorologist for the National Weather Service of Des Moines, attributes the hefty cost to the size and longevity of the derecho and its destruction of crop acres. The violent weather phenomenon you've probably never heard of, RELATED: 13 tornadoes hit greater Chicago area during derecho, NWS says, RELATED: Chicago tornado: EF-1 carves 3-mile path from Lincolnwood to Rogers Park, heaviest damage along Jarvis. National Oceanic and Atmospheric Administration, Rare Blue Dragons Wash Up on Texas Shoreline, Ultra-Rare Blue Bees Have Been Spotted in Florida, Rare Brain-Eating Amoeba Confirmed in Florida, What Is DBT? Questions? 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