but a much longer period of drop. depends on hours chosen... Mine above started maybe 4 in the afternoon as the winds came in... possibly an hour sooner... and the 18F was at 5:30 am. so perhaps 15 hours or so?

checking now at 6:50 am 19F. originally predicted to 15F... got warmer yesterday that the 31F predicted.. got to 42F for a few hours and then began to cool again.