| Fig. 28. A false-color infrared aerial photograph of a portion of the tornado blowdown at the Tionesta Scenic Natural Area, Pennsylvania. This photograph was taken by U.S. Forest Service personnel 2 weeks after the tornado in 1985. The red color indicates intact and healthy plant canopies. Careful examination of the photograph reveals the spiral pattern of downed logs within the blowdown, reflecting the rotary motion of the tornado winds. The tornado began to touch down just to the left of the frame of the photograph. | |
