"Martin Rowley" schreef in bericht
...

: On Dec 26, 8:59 pm, "Colin Youngs" wrote:
: Sunday 26th December 2010
: UK min. temps on Saturday night http://tinyurl.com/2auy3y8
: Sennybridge -13.3 C, Castlederg and Shawbury -15.1 C,
: Reported rainfall totals in 24 hours ending 18.00 UTC on Sunday
: Wick 11 mm, Ballypatrick 13 mm, Castlederg 19 mm.

: David G wrote:
: Castlederg -16 deg min and 19mm rain equivalent seems anomalous ?

: ... from the SYNOPs in the 24hr to 1800Z (26th Dec), the minimum
: temperature reported was set the *previous* evening (25th) around 21Z;
: the temperature rose above zero degC between 06 & 07Z today (26th) and
: rain started around 12Z today - quickly becoming occasional moderate. No
: doubt the precipitation figure for the 24 hours is composed of a mix of
: rainfall between 12 & 18Z and melted snow remaining in the gauge.
:
: We're going to get quite a number of 'anomalous' rainfall data reports
: from the many automatic stations dotted about - caution required :-)

Yes. I deliberately wrote *reported* rainfall totals. I also intended -
but forgot - to make the point that some were no doubt a mixture of actual
rain and old melting snow and therefore inaccurate and misleading.

Colin Youngs
Brussels