fulminous - Of or pertaining to thunder and lightning; fulminating.

1635 HEYWOOD Hierarch. II. 63 In his hand a Trisulc thunderbolt or Fulminous brand. 1665 SIR T. BROWNE Wks. (1835) IV. 354 The like fulminous fire killed a man in Erpingham church. 1876 F. HARRISON Choice Bks. (1886) 122 Sad as those fulminous imprecations on mankind, when Lear bows his head to the storm.