August 10th wasn’t really on my radar as a chase day, portions of Eastern South Dakota and Nebraska were in a slight risk as a weak surface low was expected to develop in North Dakota with an attendant surface trough arcing into Nebraska. Shear wasn’t that great but values were high enough to support supercells if they could develop.
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While a big severe weather outbreak was expected along the Eastern Seaboard, back around my parts moderate westerlies overlaid atop an expected lee trough near the Nebraska Panhandle and Eastern Colorado would set the stage for scattered supercell development with all hazards possible.
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I hadn’t planned to chase this day but I knew SPC had put out a 2% tor on the day 2 so I figured I’d at least check data in the morning to see if it’d be worth a look. The morning of, SPC had upgraded to 5% on the tornado risk and it looked like a surface low that was sliding across South Dakota might be enough to back the winds along an area of confluence that was stretching from Sioux Falls towards Omaha.
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