John Dann wrote:

then that's the consequence. Another similar symptom is the provision
of a (calculated) cloudbase height based purely on surface temperature
and RH. It may look pretty as an iconic presentation - and of course
that's what sells it - but is likely to be wrong more often than it's
right.

I have to admit I added that to a recent version of my software, but I
wasn't completely comfortable with it. And it only appears (optionally)
on web pages, not on the PC display or anywhere in the recorded data.
--
Steve Loft
Sanday, Orkney. 5m ASL. http://sanday.org.uk/weather
Free weather station softwa http://sandaysoft.com/
uk.sci.weather FAQs/glossary/etc: http://weatherfaqs.org.uk/