"Richard Dixon" wrote:

snip

Certainly I can't remember a day since working in the City where I've
seen such heavy rain throughout the day. Surprised Clerkenwell was
only showing 15mm as per Phil's email just now.

I've put together a sketch map showing the rainfall on
the rainfall day (i.e. 09z 15th to 09z 16th, based on
about 40 ground truth observations including several
noted on usw, modulated by the radar output:

http://www.climate-uk.com/page2.html and scroll to the
bottom of the page.

Highest observations I've seen are 60.2mm at South
Farnborough, 53.2mm at Hampstead obsy, 50.4mm at
Odiham, and 42.5mm at South Woodford.

The published observations of 0.8mm at Wisley and
1.0mm at Kew Gardens are clearly wrong ... indeed,
both sites have been effectively u/s for rainfall for several
months.

Wisley should be somewhere around 10-15mm, and
Kew over 40mm, perhaps over 50.

Philip