Been quite interesting to see the accumulation of rainfall (snow)
totals the last couple of days that starts around 11am and stops about
4pm. This is caused by the snow in the funnel slowly melting through
before what's left freezes.

Yesterday 2.4mm
Today 4.2mm
Still a little ice at the bottom to melt, I guess that will go
tomorrow.

Keith (Southend)

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All recording raingauges have heating elements to try to ensure snowfall is
melted and record remains reasonably accurate. Snow accumulation in
standard raingauges has to be melted at the standard recording hours ...
06.09.18 and 21. There are various ways of doing this such as melting by
adding a quantity of tepid water or taking the funnel and bottle indoors (if
it's not snowing at time)...but measuring the water equivalent of snow can
cause problems.
John
--
York,
North Yorkshire.
(Norman Virus Protected)

"Keith (Southend)" wrote in message
...
Been quite interesting to see the accumulation of rainfall (snow)
totals the last couple of days that starts around 11am and stops about
4pm. This is caused by the snow in the funnel slowly melting through
before what's left freezes.

Yesterday 2.4mm
Today 4.2mm
Still a little ice at the bottom to melt, I guess that will go
tomorrow.

Keith (Southend)

********************************
'Weather Home & Abroad'
http://www.southendweather.net
********************************
COL Station for Southend-on-Sea
http://www.wunderground.com/weathers...p?ID=IESSEXSO1
********************************
Reply to: kreh'at'southendweather'dot'net
All mail scanned for virus's using Norton 2003

"Keith (Southend)" wrote in message
...
Been quite interesting to see the accumulation of rainfall (snow)
totals the last couple of days that starts around 11am and stops about
4pm. This is caused by the snow in the funnel slowly melting through
before what's left freezes.

Yesterday 2.4mm
Today 4.2mm
Still a little ice at the bottom to melt, I guess that will go
tomorrow.

Hi, Keith,

I have a 12 volt system rigged up in my Davis AWS rain gauge with a 21W
car light bulb. This speeds up the thawing process. It works reasonably
well above -2C.

ATB,

--
Ken
http://mysite.freeserve.com/copley
kencookATcopleydurham.freeserve.co.uk


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I'm just visiting this group in the hope of getting an answer to my
question, and this thread seems to be the best one to send it to. The
question is "Is there a formula for determining how much rainfall in cms a
fall of snow equates to when it melts? i.e. 'x' cms of snow when melted =
'y' cms of rain." I guess that the answer will vary a bit because differing
types of snow will vary in density but even a ball-park answer would be
appreciated.
Hope someone can help. Thanks in advance.
Sigmund

"Sigmund" wrote in message
...
I'm just visiting this group in the hope of getting an answer to my
question, and this thread seems to be the best one to send it to. The
question is "Is there a formula for determining how much rainfall in cms a
fall of snow equates to when it melts? i.e. 'x' cms of snow when melted =
'y' cms of rain." I guess that the answer will vary a bit because
differing
types of snow will vary in density but even a ball-park answer would be
appreciated.

The rule of thumb is 10:1, but as you say it can vary enormously
according to the water-content and air-content of the snow. In the UK
I've seen (albeit rarely) ratios as high as 25:1 ... or as low as 4:1 even
without significant thawing.

Philip Eden

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...

"Sigmund" wrote in message
...
I'm just visiting this group in the hope of getting an answer to my
question, and this thread seems to be the best one to send it to. The
question is "Is there a formula for determining how much rainfall in cms
a
fall of snow equates to when it melts? i.e. 'x' cms of snow when melted
=
'y' cms of rain." I guess that the answer will vary a bit because
differing
types of snow will vary in density but even a ball-park answer would be
appreciated.

The rule of thumb is 10:1, but as you say it can vary enormously
according to the water-content and air-content of the snow. In the UK
I've seen (albeit rarely) ratios as high as 25:1 ... or as low as 4:1 even
without significant thawing.

Philip Eden

That seems about right this time; I have recorded 6mm of rain and the snow
depthe was about 6cm.

Alan

"Sigmund" wrote in message
...
I'm just visiting this group in the hope of getting an answer to my
question, and this thread seems to be the best one to send it to. The
question is "Is there a formula for determining how much rainfall in cms a
fall of snow equates to when it melts?

Thanks for your help Philip and Alan.