Temp inversion

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[Coach B]

Pretty good inversion layer this morning.  When I left my house on the hill a little after 6 the temp was 44.7 with obviously no frost.  On my way through Lewisburg I noticed a pretty solid frost in most spots.  Checked the 6AM temp for Lewisburg and it was 32.  That's over 12 degrees difference!

[ctbpharmd]

Amazing how on radiational cooling nights, valley areas are spared from an increase in winds and small WAA. It also proves one of the only things I remember from physics, cool air sinks while warm air rises.

[Clay in Oak Hill]

The clear nighttime temperature in Nashville almost always ranges by 5-10º due to a combination of hilly topography and the heat island effect. Of the 3 big cities, I'd say Nashville is the hardest to forecast low temps because of the variability.