Towering cumulus (pyrocumulus) forming on a grass fire near Spade, Texas on July 3, 2008. Picture looking northwest from Reese Center. Photos courtesy WTM.

Grass fire started by lightning on June 19, 2008. First picture shows smoke being ingested into storm updraft. Photos courtesy B.C. McDuck.

Grass fire with pyrocumulus cloud northwest of Abernathy on June 20, 2008. Photo courtesy Cameron Hettler.

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