I find, as I suspect we all do, local variations in weather to be pretty fascinating. I don't recall if I ever mentioned on the forum that a weather friend emailed me about temperature data anomaly a while back. During the night he had a spike of 10? or so, a jump of some consequence, that lasted a couple of hours and then went back down. He was asking what might have caused it (though he knew - just testing me). Turns out that earlier in the afternoon he has spread fresh manure on the adjacent field and the decomposition was sufficient to raise the temperature of the immediate area.