38.7 mm fell 1800-1800Z on 1st Oct 2010.

Two things to note:
(1) This 1800 to 1800Z period actually covered the rainfall event in
its entirety for a change.
(2) 12 mm of the total fell on 30 Sep. which has consequences for the
reporting of monthly rainfall on this occasion.

This was the sixth highest 1800-1800Z total I have recorded in Wembury
since starting in 1983.
Here are the other higher 1800-1800Z totals:

48.6 mm 25 Aug 1986
45.1 mm 26 June 2006
42.7 mm 20 Dec 1989
40.0 mm 19 May 1996
39.8 mm 11 Oct 1993

Len Wood
Wembury, SW Devon, 83 m asl