In uk.sci.weather on Sun, 29 Apr 2007, Citizen Bob wrote
:

Notice that I specifically referred to nights *without* frontal
activity, though...

How can "clouds come over" if there is not some kind of frontal
activity.

Well, fog forms without frontal activity...
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)