Perhaps from blore above, a variant of blare, affected by blow. Compare also Gaelic and Irish blor (“a loud noise”).
Meanings
(obsolete) The act of blowing; a roaring wind; a blast.
a most tempestuous blore 1614–1615, Homer, “(please specify the book number)”, in Geo[rge] Chapman, transl., Homer’s Odysses. […], London: […] Rich[ard] Field [and William Jaggard], for Nathaniell Butter, published 1615, →OCLC; republished in The Odysseys of Homer, […], volume (please specify the book number), London: John Russell Smith, […], 1857, →OCLC: