On Sat, 28 Apr 2007 17:39:13 GMT, Paul Hyett
wrote:

What is the mechanism by which the temperature *rises* when clouds come
over on otherwise clear nights*?

Common sense suggests that the most they could do would be to halt the
drop in temperature. After all, a rise in temperature *should* require a
heat source, and those are absent at night.

*I'm referring to nights with no frontal activity, of course.

The fact that the weather changed "when clouds come over" tells you
that a front or weather cell of some sort moved in.

Warm fronts coming off of water are usually have a high moisture
content, so the dew point (DPT) should rise as well as the ambient
temp.


--

"Perhaps the meek shall inherit the Earth, but they'll do it
in very small plots - about 6' by 3'."
-- Robert A. Heinlein