Speaking of the Aurora Borealis (4 April 2011 post), here is one that happened in Lovecraft's youth. 21 July 1910.
Eva had some type of ecstatic spell and called for an end of the world. Her let down, or come-upance as it might be, came on the day of a mild aurora borealis. It is unknown if she was a member of "the jehovah witnesses", but maybe.
She would have been nearly identical in age to HPL.