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Old December 13th 07, 12:17 PM posted to uk.sci.weather
Norman[_2_] Norman[_2_] is offline
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Default Question - Melted Hoar Frost/Rime - is it counted in Rainfall Totals?

Ken Cook wrote:

On 13 Dec, 11:58, "Philip Eden" philipATweatherHYPHENukDOTcom wrote:
But always bear in mind that plastic gauges, especially elevated
ones, catch rather more moisture from hoar/rime/condensation
than a standard metal gauge.

The Eden rain-gauge mantra: if you have an AWS, fantastic, but
always try to have a standard manual rain-gauge too. Because
it's, well, standard.


Hi, Philip,
As you say, the AWS catches more condensation. My Davis often tips
0.2mm "dew catch" whereas the Met O copper gauge is normally trace, if
any, and occasionally 0.1mm during thick, wet fog. It rarely amounts
to 0.2mm in 24 hours.
Ken
Copley, Teesdale.


Unusually, I got 0.2 mm from melted hoar frost in the standard 5"
copper gauge this morning. There was a heavy hoar frost, though.

Norman
--
Norman Lynagh
Chalfont St Giles, Buckinghamshire
85m a.s.l.
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