Through a damage survey that had the most detailed information in all of the published tornado damage surveys so far in China, this work showed significant evidence that the wind damage was caused by a mesocyclonic tornado rated as a category 3 storm on the enhanced Fujita scale (EF3) that was observed by people but of which not a single picture was taken. On 21 July 2012, severe wind damage occurred in Beijing, China, during a heavy rainfall event. The picture in (f) was shot by the first author. The pictures in (d) and (e) were provided by M. The pictures in (a)–(c) are snapshots from a video provided by. The red arrows in the bottom-right corner of each panel denote the direction that the photographer was facing.

(f) The fallen trees in the north-northwest direction on the eastern edge of the village. (e) A fallen tree in the east-northeast direction along a road immediately neighboring the west–east-oriented road in (d), east of the south–north-oriented road. (d) Fallen trees in the north-northeast direction, south of a west–east-oriented road in the southwest corner of the village.

(c) A tree leaning in the south-southeast direction (highlighted by the large white arrow), west of the north–south road ~100 m farther north of the scene in (b). (b) The fallen trees in the east-southeast direction just across the street from the scene in (a), west of the north–south-oriented road. (a) A fallen tree (highlighted by the large white arrow) in the south-southeast direction, east of a north–south-oriented road.

1d,e in DXZ, in which the lowercase letters correspond to different panels in this figure. 4, 6, 6, and 7, respectively, labeled with the same lowercase letters. The photograph of the trees indicated by lowercase letters in (c) –(f) (placed at the end of the denoted arrow) are shown in Figs. Shown are enlargements of (a) for the fallen trees at (c) south FT, (d) west DXZ, (e) east DXZ, and (f) south XDFZ. The map scale in (b) is given in its bottom-right corner. (b) The tornado track (red line) on a map of Beijing with terrain height (shaded), the rawinsonde and radar station (the same location as the red dot) of Beijing, and the height (km AGL) and time variation of the air balloon of the rawinsonde at 1400 LST. The direction of the map is given in the bottom-right corner. The colored dots denote the EF scale of the damage. The small light-blue arrows denote the direction of tree fall. Pictures 1 –5 were provided by Bato.cn, 6 and 7 by, 8–10 by M. (a) The tornado track (white line) and damage swath (red shading) on a satellite map obtained from Google Earth with some damage pictures at DBG (1 and 2), XBG (3), FT (4 and 5), ZLZ (6), DXZ (7 –11), and XDFZ (12 and 13).

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