Scientists Confirm 300+ MPH Winds in Greenfield Tornado!

July 2024

Hello, Friend!  Hope you're enjoying the weekend.

After an amazing severe weather season, we're finally enjoying some quiet in the Plains. So there's no better time to look back at one of the most intense tornadoes of the year!

GREENFIELD TORNADO MAX WINDS

Recently, the Center for Severe Weather Research confirmed that the EF4 Greenfield, Iowa tornado had some of the most intense winds ever observed. Based on Doppler on Wheels (DOWs) data, they estimate that the tornado contained winds of 309-318 mph!

As the 2024 #BEST field season ends, a glimpse into the data collection during the Greenfield, IA tornado. Peak wind speeds as high as 309-318 mph were calculated in a narrow region 100-160 feet ARL. These are among the highest wind speeds ever determined using DOW data. https://t.co/CM09J3VSOB pic.twitter.com/fuxfdyoi9d

— Doppler on Wheels (DOW) (@DOWFacility) June 22, 2024

These winds were measured near th...

2024 Tornado Bonanza Continues

June 2024

Happy June!  I hope your May was as good as mine.

I just returned from a highly successful storm chase vacation. Amazingly, we tracked 9 tornadoes in just three days.  And most of those came from the amazing Windthorst, Texas tornadic storm on May 25th.  It had one of the best combinations of tornado and supercell structure that I've ever witnessed:

And, as amazing as that storm was, there were even more stunning storms before we arrived.  And arguably, the most violent of these was the wedge tornado that hit Greenfield, Iowa on May 21st.

GREENFIELD, IOWA EF4

This storm truly was one for the ages. In progress for nearly an hour, this intense tornado hit the small town of Greenfield near the end of its path.  The Doppler on Wheels, which were collecting data during the tornado, measured winds of at least 250 mph in the funnel:

Very prelim analysis of DOW data show
>250 mph peak winds, possibly high as 290, at 44 m (144 ft) above g

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Sometimes, it's hard to remember how you began.

And that's definitely true for long-time chasers. We sometimes forget how hard it was for us in the beginning. And when I started, I was really bad at it.  So I thought it might be helpful to tell how I became a chaser

For me, it all began in 1990. On May 15th, a powerful F3 tornado struck my hometown, Stillwater, OK.

After the tornado hit, I became fascinated with tornadoes. Trouble was, I didn't know where to find information about them. My mom suggested that I write the local weatherman, Gary England,  to see if he might be taking his tornado safety talk to town.

To my surprise, Gary wrote back. His letter arrived 3 weeks after I sent mine. He said that, sadly, he wouldn't be coming to Stillwater that year. But he gave me a copy of his book "Those Terrible Twisters and the Weather of Oklahoma"

That was when my obsession truly began. The book that Gary gave me had it all: tornado pics, dates, locations -- everything. I liter...