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Storm that hit Northwest Iowa could be a derecho
Gazette staff
May. 13, 2022 1:28 pm, Updated: May. 13, 2022 2:03 pm
A storm that moved Thursday across Nebraska, South Dakota and Northwest Iowa could have been a derecho, the National Weather Service said.
Wind gusts of up to 80 mph uprooted trees, overturned semis and kicked up a wall of dust as the storm swept through. The weather service received many reports of hail, ranging from a half-inch to over 2 inches in diameter.
“Looks like we've met the definition of a derecho again,” the weather service tweeted.
It’ll be up to Storm Prediction Center at the National Oceanic and Atmospheric Administration to decide. A derecho, according to NOAA, “is a widespread, long-lived windstorm associated with a band of rapidly moving showers or thunderstorms variously known as a squall line, bow echo, or quasi-linear convective system. Although a derecho can produce destruction similar to that of a tornado, the damage typically occurs in one direction along a relatively straight swath. As a result, the term "straight-line wind damage" sometimes is used to describe derecho damage.”
By definition, a derecho must include wind gusts of at least 58 mph.
On Aug. 10, 2020, a derecho swept across Eastern Iowa and caused the worst damage in Cedar Rapids, where gusts were reported of up to 140 mph.
An overturned semi is shown Thursday evening in the median of Interstate 29 near mile marker 21 north of Elk Point, S.D. Heavy winds toppled three semis on the interstate between Elk Point and Spink in South Dakota. (Tim Hynds/Sioux City Journal)