I chased a Cinco de Mayo supercell in Far West Texas. The storm formed in a well mixed boundary layer airmass, where CAPE was moderate, deep-layer shear was strong, but SRH was minimal. The storm then crossed a stationary front, with structure becoming more interesting, and tornadogenesis seemingly imminent. However, tornadoes failed to occur, and the likely culprit was continued slight to moderate cold dry air advection via east-northeast winds. Not only did this cause the storm to encounter lower CAPE, lower moisture, and greater CIN on the cool side of the boundary, but hodograph structure also displayed large crosswise vorticity in the lowest couple hundred meters AGL. The MAF afternoon sounding launched a bit east of the storm is posted below, and displays the unfavorable near surface hodograph structure.
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