In-depth case study of the historic super outbreak of tornadoes that occurred on April 27, 2011. This video features a deep dive into the meteorology behind this infamous day, rounded out by a comparison between the April 27 event and the previous standard for tornado outbreaks, the April 3-4, 1974 event.
Thumbnail images via ABC 33/40 and the National Weather Service.
April 27, 2011 journal article (Knupp et al. 2014): https://journals.ametsoc.org/view/journals/bams/95/7/bams-d-11-00229.1.xml
April 3-4, 1974 journal article (Corfidi et al. 2010): https://journals.ametsoc.org/view/journals/wefo/25/2/2009waf2222297_1.xml
Chapters:
0:00 Introduction
3:58 Meteorology behind the April 27 outbreak
44:13 Comparison between April 27, 2011 and April 3-4, 1974
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YESSS! I get so excited every upload I see from this channel. April 27th is an event that made me fall in love with weather. I remember watching it on TV after elementary school. One of the wildest weather events in all of recorded history. I pray we never see an outbreak like this again
What number source are you using? Asking because the SPC basically stopped looking into it very early on, and the final numbers weren't established until very recently. 360 total, 218 on the 27th.
Another thing: During the development of Tornado Archive it was found that SPC records have very poor QC overall. Wikipedia is actually a better source in this regard.
how do you determine HP soundings from LP soundings?
Coming out big with this case study; can't watch all of it now but will when I get out've work. The amount of time and effort you put into these videos is incredible.
woooo! can't wait to watch this
There was a fair amount of golf all to baseball. It just gets overlooked because of the tornadoes. Was even a grapefruit Hamilton, Al and later in the evening in Virginia.
What matters for hail is large updraft which comes from strong shear allowing for downdraft transport ahead of the LLJ & favorable amount of turning relative to 590m-2km flow. Especially in a deep EIL.
Thanks for the overview. Hard to pass up any video of this event. Generally always learn something from you, since focus more on macro/synoptic variables.
I feel like at 34:50 the potential hazard type should just read "Death" or "Armageddon".
This video meet my expectations! I love this channel!
Great video man. Earned a sub 👍
Another amazing video! I stared watching your videos with the Dec. 10 outbreak and have been watching many of your videos since! I've learned so much from these videos, thank you for making them!
I love your videos man!
Absolutely awesome video again Trey, great meteorological breakdown of such an absolutely unfathomable set up!
5/3/99 and 5/24/11 would be another good detailed case study if possible in the future
As always, a hell of a breakdown Trey! Always great to go back in time and learn a bit about these setups! Keep it up brotha
Thank you I've been waiting on your case study from this day
Quick question. Why in the high plains you don't need higher dew points as you do in the traditional plains or deep south for severe weather or tornadoes? Is it because of elevation or location?
Awesome, was hoping you'd do one on this.