The December 2021 Derecho And Tornado Outbreak Retrospective



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Edit: Turns out, some transitions into some scenes are screwed up for some reason. However, I feel like it is not worth rendering it AGAIN for 10 HOURS, to fix something as a fade out not happening. Sorry if that bothers people.

December, a month often associated with holiday festivities and spreading the holiday joy to those around their peers. For many early on in December in 2021, that was the case, well, until two notable severe weather events occurred across the United States. The most well known event, The December 10-11 Tornado Outbreak, was known for an EF4 tornado that impacted Bowling Green, Kentucky, and a large, long-track, wedge tornado that tore through Mayfield, Kentucky and multiple towns and cities in western Kentucky during the tornado’s three hour duration, travelling 165 miles. The December 10-11 Outbreak broke the record for the most tornadoes in a tornado outbreak in the month of December, and is often the most well known and talked about tornado outbreak from 2021. However this video isn’t about Mayfield. It’s about what happened 4 days later.

Not even a week had passed and something just as insane as the Mayfield outbreak occurred. In the upper plains and Midwest. In December. A Derecho that became one of the most prolific severe wind events in the United States History, with only the May 12, 2022 Outbreak being in close contention for the title for the most severe wind reports from a derecho. A derecho that began much earlier than expected, travelling over 700 miles in the span of roughly 8-9 hours total, impacting states such as Kansas, Nebraska, Minnesota, Missouri, Illinois, Wisconsin, Michigan, and Iowa. More notably though, the record that the Mayfield Outbreak had, the most tornadoes from a single outbreak in the month of December, was broken in less than a week from this derecho, with a total of 120 tornadoes touching down across the upper plains and midwest. Not ONLY was there a threat for a Derecho and tornado outbreak, but the threat of winter weather, wildfires, and strong winds were present across all areas impacted by the severe weather. Join me, as I breakdown one of the most complex significant weather events in recent memory.

Special Thanks to Nick Stewart For Agreeing to an Interview:
https://www.youtube.com/user/Stewie2552

Chapters:
0:00 Introduction
1:48 The 2021 Severe Weather Season and it’s “Specialties”
3:14 Basic Setup and Background
5:21 Fire Weather, Strong Winds, and Winter Weather Setup
9:39 Derecho Setup
12:13 Tornado Outbreak Setup
15:03 General Synopsis and Significance
18:37 The Events of December 15, 2021.
27:23 Aftermath Of the Events
31:35 The Winds still Blow

Special Thanks to:

Rishi, Devon Williams, Alice, Diego Garcia, Thomas Schwent, and many other people for aiding in the production of this project.

COPYRIGHT DISCLAIMER:

Under Section 107 of the Copyright Act of 1976, allowance is made for fair use for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing.All Images, footage, and music are NOT OWNED BY ME AND ARE OWNED BY THEIR RESPECTFUL OWNERS. I own nothing but the video itself.

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37 thoughts on “The December 2021 Derecho And Tornado Outbreak Retrospective”

  1. I was in a lesser-known derecho in northern Wisconsin in 2019. I was already monitoring the weather that day because we were within an enhanced risk area, it was upgraded to moderate later on with a large hatched 45% damaging wind area. Eventually a PDS severe thunderstorm watch was issued.

    The cabin was about 50% destroyed from >1' diameter trees falling and caving in the roof. Destroyed 60,000 acres of national forest in the surround area. That was easily the most destructive storm I've been through

    Reply
  2. Yea the storm didn't dissapate until Indiana I live in central Illinois and the fire department was out before the storm came in we evacuated the parks as best we could with the short amount of time we had and then it hit it lasted maybe ten fifteen minutes I dont think we got home until one am or later we spent all day pulling people out of homes that had been wrecked the few people that didn't make it out of the parks and then we spent the rest of the night chasing fire alarms once powered was restored

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  3. Amazing video. I live in the Omaha area and that day (as a wx enthusiast) was absolutely insane for me. the craziest part to me was the fact I went to bed in a MRGL risk and woke up in a MDT. Overall that day is one I will always remember.

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  4. I’m really familiar with this day because this day was the first time I ever had a TRUE tornado warning while being in school. This day was literally the worst day of my life. Although we were safe, the sky was literally like a monster. My father got off early and got videos of ROTATION above our house. We have over 20 animals located at our house, so I’m sure he was devastated. Moral of the story, don’t take tornado warnings lightly

    (this was in the Tri Cities of Nebraska)

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  5. I was worried about tornadoes. This was before I did my own forecasting and only stocked the SPC website. When I saw similar verbiage to the tornado outbreak days before that produced the Mayfield tornado I made sure to have my disaster kit ready to go.

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  6. I fear derechoes like this will be increasingly common with climate change and possibly will have longer runs in the future as conditions in Michigan on the 16th produced isolated severe thunderstorm type damage although without warnings at Sand Lake and Jackson.

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  7. Weird question. When this rolled through, here in Wisconsin, we got absolutely dumped on all night with snow. I hadn't seen snowfall that thick and long in ages. I know there's some humor in asking this about the weather, but is there a way to predict this again a few days in advance? I want to make sure I can fully enjoy it.

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  8. This is very interesting I dont live there but I remember everything from the 10th to the 15th I remember looking up the NWS website looking at the severe weather days and it was well tragic and interesting I knew this was gonna be a bad day and it proved very much so the very powerful ef4s and the deerecho my uncle lives in tennesse although nor impacted and a freind with family in arkansas who I dont know were but was most likely impacted

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  9. i remember that day very clearly i was in school and there was like 300+ kids in a gym
    so the story:
    it was a sunny day with a chance of storms and so it was during math and i was working with my friend on our assignment and i go to use the restroom and the restrooms were by the office so the office window was open and the secretary was with the principal talking about the weather so i was like whatever so then when i went back to class i passed the office and the secretary was like there's a tornado warning not noticing i was there and so i head back to class and warn my friend so then the tornado system through the school went off then the city sirens went off and so there was so many kids crying and screaming so it was chaotic and then it got really loud with tons of hail and wind. there was a touchdown downtown and a touchdown right by my house they were confirmed tornados but when we went to leave we couldn't because there was so much hail that the doors were blocked shut by hail. luckily no one was hurt no bad damages i think it was only like 2k in damages or something like that and it was just a chaotic weird day for us but the tornados were like f0 and f1 so it wasn't anything to terrible

    Reply
  10. Yeah in 2021 I was 15 miles from that EF3 tornado in the Chicago suburbs that you mentioned in the this is fine meme st the beginning. Also, that tornado happened at 11PM WHICH WAS TERRIFYING BECAUSE WE COULDN'T SEE ANYTHING.

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  11. I live in Iowa but my area seemed to go right between a majority of where the tornadoes ended up, and some much stronger winds just a little bit south than what we got. It was still quite bad but since I witnessed the August 2020 Derecho that hit Cedar Rapids (close to my area) really hard, it wasn't close to the level of straight-line winds that storm had at least in my small area. The most severe stuff happened farther west in my case. Watching the whole event unfold on radar was crazy. I remember at one point the entire line of storms in our state seemed to have some tornado warning. I've never really seen anything like that and I hope not to ever again.

    Reply
  12. I live in SE Minnesota, and this was an absolute mind fuck. Literally the weekend before, we had a snow system that came through, and that previous Saturday morning we had 8" of snow on the ground. Nothing that unusual, and the next several days had sub-zero highs…

    …except for two days. This being one. The morning before this day, it was below freezing. We still had our eight inches on the ground. The high than soared into the 50s. Water absolutely everywhere. Then thay night, only made it down to the low 40s. This caused fog so thick the next morning, I was reduced to at most 40MPH going into work. I typically travel at 70MPH. Then that evening there were tornado warnings, and the sirens were going off. We had like no snow on the ground at this point.

    The next morning? Walked outside to flurries falling, wondering what the absolute fuck just happened.

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  13. I live in Minnesota. You don’t have to believe me on this, but the week before this event I was predicting there would be a risk of severe weather, I noticed that this one day would be 50s, almost the 60s, instead of the low 20’s. And the day of storm, I found out there was actually a tornado. I wasn’t surprised I was one.

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  14. Doing something good here! Appreciate all the effort you put into this, can clearly hear your passion for this. and i think that passion is the most important thing in any field. Cheers man!

    Reply
  15. We get shitty winds in December enough for us to be able to realize that it can occur in December here in California. I always notice that, if we get shitty winds in the winter instead of actual rain storms, even brief ones, we are going to have a shitty winter where the entire damn thing is still too hot to take a proper hike in the beautiful mountains and hills and the earthquake faults in the area have wrought for us. Whenever you know the atmosphere wants to rain but you can see that there are reasons why it probably won't, think winds and the fact that you will both be screwed out of rain and out of temperate weather to actually do something outside.

    Reply
  16. Ugh I remember this so vividly… I live in the Iowa Great Lakes, and I feel like severe weather tends to always JUST miss my area so like the idiot Iowans we are my husband and I went to Walmart to get our groceries. Got out of the car and the tornado sirens started going off (I’ve only actually heard those a few times here) we looked at each other like “woah. Nice” and kept going in. Got to the doors and the workers were actually walking out telling us to go home because they were closing (which has only happened once ever that I can remember). So we got in the car and went back home. As soon as we got back into the house- and I mean within SECONDS- we got hit with straight line winds that easily would have knocked me on my you know what. Moral of this long uninteresting post- listen to the weather reports. Even if you live in Iowa🙃

    Reply
  17. I know you guys may or may not believe this but my youth group from church we went to kentucky and we drove from virginia to Kentucky using 2 vans we got there in 20 hours and we were there for 7 days helping people rebuild we slept at a church in a town that wasn't affected in the area of madisonville.

    Reply

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