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WOW These cooking outflow boundaries with big instability, easterly surface winds beneath modest westerlies always produce the biggest, strongest wedge tornadoes in the Great Plains. WATCH OUT OKC #tornado threat 5-11 pm!

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Reed Timmer, PhD

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82,202 Aufrufe • vor 1 Jahr •via X (Twitter)

Wissenschaft & TechnologieBildung#tornado
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Golf Safetyvor 2 Jahren

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Amandavor 1 Jahr

Texas is ok tho?

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Reed Timmer, PhDvor 1 Jahr

Can you please watch the video

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TornadoVorticesvor 1 Jahr

Kinda remind me of El Reno but I hope not.

Profilbild von Pattye 🦉🇺🇲 🇺🇦
Pattye 🦉🇺🇲 🇺🇦vor 1 Jahr

Thank you Reed. Stay safe. That beard and mustache are looking very attractive

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5Gvor 1 Jahr

uhm

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Opie Winstonvor 1 Jahr

You all gonna be out chasing them?

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J C Adamsvor 1 Jahr

More rain, Shad? ☝️☝️ @yearlins

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This video was my first ever Dakota mega wedge #tornado setup - the Manchester F4 on June 24, 2003. This was when I first realized the unstable warm frontal / outflow boundary zones during summer produce the largest, most violent tornadoes. They are often very slow moving, if not stationary, with the classic easterly under westerly wind profile and big instability. The El Reno mega wedge #tornado from 2013, as well as the Bennington, KS mega wedges from 2013 and 2016, the Pilger Twin EF4 tornadoes, Coleridge and Alpena days in 2014 were also similar setups. This year, the Spiritwood, ND and Gary, SD #tornado setups were also similar unstable warm front / outflow boundary zones with summer instability.
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This video was my first ever Dakota mega wedge #tornado setup - the Manchester F4 on June 24, 2003. This was when I first realized the unstable warm frontal / outflow boundary zones during summer produce the largest, most violent tornadoes. They are often very slow moving, if not stationary, with the classic easterly under westerly wind profile and big instability. The El Reno mega wedge #tornado from 2013, as well as the Bennington, KS mega wedges from 2013 and 2016, the Pilger Twin EF4 tornadoes, Coleridge and Alpena days in 2014 were also similar setups. This year, the Spiritwood, ND and Gary, SD #tornado setups were also similar unstable warm front / outflow boundary zones with summer instability.

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Check out the rapid motion on the backside of this violent wedge #tornado. I have chased many violent tornadoes over the last 30 years, and this tornado in southern Ms had the look of the strongest
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Check out the rapid motion on the backside of this violent wedge #tornado. I have chased many violent tornadoes over the last 30 years, and this tornado in southern Ms had the look of the strongest

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What's a "wedge" tornado? And how rare are "megawedge" tornadoes? There is no technical definition of a "wedge." Storm chasers consider wedge tornadoes to tornadoes that appear wider than they are tall. (For the tornado's height, they use the distance from the ground to the cloud base – AKA the "lifting condensation level". True tornado circulations extend up to 30,000 or 40,000 feet into the storm, so no tornadoes are *actually* wider than they are tall. We just can only see the part of the tornado that hangs down from the cloud base.) The tornado you see below occurred in Harlan, Iowa on April 26, 2024. It's the biggest I have ever seen. It was 1.1 miles wide, and had winds estimated by mobile Doppler radar up to 224 mph! Only 1 or 2 in 1,000 tornadoes grows larger than a mile wide – at least according to National Weather Service survey data. Realistically, that number might be significantly higher when counting inflow winds and ill-defined edges of the tornadic circulation, especially in rain-wrapped environments. (Where does the "tornado" end and the wind "around" the tornado begin?) MEGAWEDGE tornadoes are informally considered anything wider than 1.5 miles in diameter. The National Weather Service has only "officially" logged 30 megawedge tornadoes out of the 84,000+ in their database. The BIGGEST tornado on record occurred in El Reno, Oklahoma on May 31, 2013. It was 2.6 miles across! That said, researchers found evidence that the Mulhall, Okla. tornado on May 3, 1999 had a peak "core circulation" about 4.3 miles wide. In other words, that's the diameter of the 96 mph or greater winds. Let's hope 2025 doesn't feature any megawedges! If there are, we'll be streaming them in the MyRadar Weather app!
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