In message , Alan Gardiner
writes


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.

Over the same period I had a total of 4mm of rain with a amximum rate of
18mm of hour so the very heavy rain missed me. I must be only 10 miles awy
to the NE. I had another 3mm between 1600 and 1645 BST giving a total of 7mm
for the day.

This just demonstrates the flaws in the severe weather warning system as if
one was issued for this event it would probably covered both our locations
due to the broad scale used.


Alan Gardiner
Chiswell Green, St Albans
101m ASL

There was a severe weather warning issued eventually for Buckinghamshire
but only after the event was over here. I'm not sure whether or not
there was one issued for Hertfordshire.

Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England