Citations:heat lightning


 * soundless lightning:




 * ≈heat thunder; thunder which is heard, with no lightning seen:




 * lightning and/or thunder attributed to heat (sometimes especially rather than a rainstorm):


 * 1947-1951 (published in 1957), Jennie V. Knowles and Wiswall, testimony in the case of "Lemuel Hanaman against New York Telephone Company", before the Supreme Court of the State of New York (published in Burrhus Frederic Skinner's Verbal Behavior, page 475:
 * [Knowles:] [A]t the time he used the phone, there wasn't any thunder. [Wiswall:] Q. How can you say that? A. Well, there wasn't. Q. You mean you didn't hear any? A. You don't hear it now, do you? That is just the way it was. [...] Q. you don't remember ever having heard thunder when the sun was shining? A. Well, heat thunder, you know, and lightning. Q. Sure, heat thunder and heat lightning, and this was a hot day, wasn't it? A. Yes. Q. It had rained just before noon? A. Just a sprinkle. [...] Q. Just the sort of a day that you have frequently seen heat lightning and heard this heat thunder that you speak about, isn't it? A. No.}}


 * in particular, such lighting if also heard: