Re your tipping bucket query, Campbell Sci quote an error of 4% at 25 mm/hr,
and 8% at 133 mm/hr, due to losses during the tipping of the bucket. I don't
know if this is a linear effect, but I am installing a TBR at my site in the
next couple of weeks, and I will try to check the error values at higher
rates.
B

--
Bernard Burton
Wokingham, Berkshire, UK.

Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html
"Will Hand" wrote in message
...
11/10/06

Well the storms last night in Devon gave me a daily 1800-1800 total of
56.4 mm.
This is the highest 24 hour total I have ever recorded since moving here.
Last
highest was 51.7 mm on 23/10/04. A very large fall but not exceptional for
this
area.

There were 4 separate storm cells. The biggest was around 2340 local which
had a
rainfall rate of 128.3 mm/h and a 20 minute total of 8.1 mm. Bar fell by
0.5 mp
in 10 minutes 2340-2350 (wake low of storm). Lots of lightning but thunder
was
intermittent. Rainfall, however, was torrential but also came in short
bursts.
No problems up here whatsoever (we never do with rain). Now like it has
never
happened. Flash flooding elsewhere in Devon though.

Now, the manual total was 56.4 mm but my AWS VP2 read just 42.7 mm, why
the big
discrepancy? All I can think of is that the rates were so large that the
tipping
mechanism could not cope. A sobering thought for users of AWS I think.
Comments
appreciated on this?

I'm chuffed. (a) we had a storm, (b) I got a pretty big rainfall total.

Will.
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A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet).

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www:
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm

DISCLAIMER - All views and opinions expressed by myself are personal
and do not necessarily represent those of my employer.
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