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Surface observations and analysis valid at 18Z, or 1 PM CDT (a), and visible satellite imagery valid at 1215 PM CDT (b).
A few hours later, around noon on the 27th, the surface cold front had sagged southeastward, and was sitting directly overhead at Waco along with the previously analyzed meso-low (Figure 5a) and gravity wave feature, which conceivably was adding to the lift in this region . Thunderstorm initiation was only minutes away at this point, and towering cumulus (just under the cold front line; Figure 5b) was evident on visible satellite near Waco. Farther to the north and east, thunderstorms were also beginning to blossom along the outflow boundary across East Texas.
