In Maidenhead 27.3mm fell in two bursts.

The first around 1630BST gave approx 8mm while the remainder
fell in a 'tropical downpour' around 1800BST. The A4 in west Maidenhead
was awash and the fire brigade were called out to remove the larger ponds
on it, according to my daughter. Lots of aqua-planing seen.

This is our second day with 25mm+ in the space of three weeks -
unusual for this part of the Thames Valley.

Roger

Norman Lynagh wrote:
Very heavy rain here since 1715z with thunder/lightning 1740-1750z.
5-minute rainfall totals a

1700z Nil
1705z Nil
1710z 0.3 mm
1715z Nil
1720z 0.5 mm
1725z 1.5 mm
1730z 2.5 mm
1735z 2.5 mm
1740z 1.0 mm
1745z 2.0 mm
1750z 1.0 mm
1755z 0.3 mm
1800z Nil

Max rate between bucket tips was 75 mm/hour.

Local roads are badly flooded and traffic disrupted. Over the past year
we have had many severe weather warnings for conditions that didn't
happen. Now we have probably the most disruptive weather around here in
the past year but there's no severe weather warning this time. Ah! - The
joys of weather forecasting :-)

Moderate rain continues at 1820z.

Norman.
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