Chiefly U.S. A strong gust of wind accompanying a thunder-storm.
1748. Franklin, Lett., Wks. 1840, V. 220. Hence thunder-gusts after heats, and cool air after gusts.
1817. Shelley, Rev. Islam, IV. xx. Like a thunder gust Caught by some forest.
1824. W. Irving, T. Trav. (1849), 389. A terrible black thundergust was coming up.
1876. Bancroft, Hist. U. S., IV. xxxvii. 122. During a violent thunder-gust and rain, Ulloa landed, with civil officers, three Capuchin monks, and eighty soldiers.
