Over 430,000 people were without power, following storms in eastern Nebraska, Iowa and northern Illinois. Doppler radar showed winds above 120 mph at about 1,000 meters above the ground as storms moved through Des Moines. A personal weather station in Des Moines recorded a surface wind of 85 mph, while some locations woke up to more than 100 km / h.
As of 3 p.m. local time, the Doppler radar showed the strongest winds in the “progressive derecho” stretching from Rockford, Ill. In Ottawa, near Interstate 80. That wind core, with embedded gestures exceeding 80 mph, will arrive in agoikago between 3:30 and 4:30 p.m.
“The possibility of spreading and destructive wind gestures damaging 70-100 + mph and maybe a tornado or two will continue as a line of storms moves rapidly eastward across Illinois,” the Weather Service wrote in a newsletter. special.
The NWS office in agoikago warned area residents to treat the warnings “like a tornado warning”, saying: “This is an extremely dangerous storm line … Go for safe shelter inside homes far away from windows (rooms without window or basement if you have one.) “
NWS warned the media and emergency managers that some areas will see winds that have more than 58 km per hour for more than 15 minutes. This can increase the chances of some structural damage, in addition to extensive destruction of trees and power lines.
At 2:54 p.m., the Chicago National Weather Service issued a strong storm warning for the city and areas east of the Indiana State Line. They noted that the gate “has a history of creating widespread wind damage in central western and northern Illinois,” and warned residents to expect wind speeds “like a tornado.”
Shortly before the storms moved to agoikago, the local NWS office warned of “wide-ranging and possibly long power outages”.
A derecho is an event that energy companies could not prepare for a few days in advance, as they would for a hurricane. Instead, power companies could be caught by the guards from these storms, which grew wild just this morning.
Numerous reports of considerable and occasional winds have been taken from all over the corn belt:
- 112 km / h near Midway, Iowa
- 106 km / h near La Grand, Iowa measured from personal fraudster station
- 100 miles per hour near Hiawatha, Iowa
- 99 mph to Marshalltown Municipal Airport
- 99 mph near Albion, Iowa
- 95 km / h estimated at Marshalltown, Iowa
- 91 km per hour near Marshalltown, Iowa
- 90 mph in Atkins, Iowa
- 90 mph in Blairstown, Iowa
- 78 km to the airport in Ankeny
- 75 mph at Des Moines Airport
- 85 mph in Moline, Ill.
- 86 mph in Davenport, Iowa
Stones over 80 km / h were ubiquitous with the line of devastating storms.
In Cedar Rapids, Iowa, an eyewitness on social media described the “complete destruction.” The Iowa Department of Transportation announced Interstate 35 and other roads were blocked due to overturned vehicles and storm damage between Cedar Rapids and Iowa City.
The weather service is advising residents to consider changing their travel plans to avoid storms, providing loose objects or putting them inside – these will include trash cans, outdoor furniture, decorations and lawn, signs, outdoor plants and other items that can become dangerous shells during a period of strong winds.
Stronger winds can precede any rain, lightning, or even thunderstorms, making it necessary for residents to heed all warnings.
“HOME Up to outdoor dining facilities and any facilities with tents and tents, such as swimming pools, and including gardens,” tweeted the National Weather Service in Chicago. “Make preparations NOW, do not wait for the storms to arrive.”
Scattered winds between 70 and 80 mph, with some gusts catching 90 mph, are likely.
“A derecho will advance rapidly in eastern Iowa and northern Illinois this afternoon,” the NWS said in a statement announcing the storm. «Widespread experiences of strong winds, some of which should reach 80-100 mph are predicted along the arc trail. Short tornadoes are also possible. “
Interstate 80 will also be affected by northwest Indiana, with strong wind gusts posing a significant risk to drivers who must seek shelter or avoid traveling until the storm passes.
Residents of mobile homes in most of the agoikagos area may also consider relocating to a structure with a strong foundation during the afternoon as storms sweep through.
On the radar, a narrow arc of rainstorms could be seen in front of the main deck as it approached Cedar Rapids, Iowa. This is a sign of “warm air spreading” or an extra warm air shouting north in front of the storms. This may allow the door to intensify further.
Derechos feed on warm, moist air. Agoikago was 85 degrees at noon, with a dew point of 72. The dew point measures how much moisture there is in the air. When the dew point exceeds 70 degrees, the air is completely tropical. This will allow the explosion of the explosive storm to continue.
The hurricane line was producing up to 70 lightning strikes on the ground per minute.
Satellite imagery of the nearby derek was utterly shocking Monday afternoon. Overlap heads can be seen as bubbles in the line along the eastern limbs of the cloud mass, where rainfall of intense storm updates. Disappearing from them are gravity waves, similar to waves in a pond, indicating extreme turbulence nearby.
Particularly impressive were the high-pitched clouds as well as the transverse bands within it – appearing as streaks of shadows radially from the center – illustrating the healthy exit or storm exhaust, on the upper levels. This is a common feature in satellite accompanied by strong hurricanes.
The same upper air model that powers the derek also sparked major storms in the North Plain over the weekend. Grapefruit-sized hail fell in the Black Hills of South Dakota west of Rapid City on Saturday as bad storms hit the Twin Cities on Sunday.
Derechos have proven problematic for many of the Northeast Plateau this year. A derecho was swept across Philadelphia on June 4, with winds reaching 80 mph downtown and 90 mph east of the city.
Another derelict destroyed power at 650,000 across the Ohio and Midwest valleys on June 10th.
Below are some photos of the door damage along its way through Iowa: