On 1 Feb, 22:49, "Nick G"
wrote:
Richard

Philip Eden stated in his synoptic:

"The strength of the westerlies also resulted in a strongly
orographically-modulated rainfall distribution (biggest percentages on
west-facing upslopes and lowest percentages in the usual rain-shadow
areas)."

Maybe this accounted for the differences?
________________

Without a doubt.

However, a few years back I did some research into rainfall patterns
in Cornwall. The EA were kind enough to give me data from many places
across the County. In the case of Cornwall the effect of altitude is
appears less significant than the distance from the spine of the
Penisula.

The places on headlands being relatively very dry (Lizard averaged
806mm in the 1990s - actually less than Scilly) whilst Penzance, in a
Bay, averaged 1185mm. Trengwainton Gardens, 1 mile from me 1267mm.
Culdrose averaged 1029, significantly drier than Mount's Bay despite
it's altitude. It all comes down to the convergence line along the
spine. Central parts of the Tamar valley are very wet for this reason.

Graham
Penzance



The wettest spots are of cause on this line, at altitude