"Martin Rowley" wrote in message
...
... 18/1400Z: snow has been continuous past hour (as it has been since
~0330Z this morning), but has now eased considerably - very slight past
10/15 minutes - still gloomy OVC; visibility now ~1500M. OAT: 0.6°C.

... 18/1545Z: the 'proper' snow eased back to rain/snow mixed plus snow
pellets by 1415Z, and there is very little PPN coming out of a grey sky
(though with markedly lifted base and visibility now at least 4 km).

Finally managed to apportion-out a rainfall ex five-inch gauge which gives
period 17/0900 to 18/0900Z = 11.9 mm: and up to my messing about around
1400Z, another 7.1 mm ... total for the 'event' then 19.0 mm, but as you
can see from my depth reports [means 09Z to 15Z varying between 5 and 8
cm], nothing like a 10:1 ratio was produced in snow depth ... though I
fancy if the starting temperature had been lower (it was around 3degC) and
the ground a lot colder (as per East Anglia for example), then we would
have had a much higher yield.

All-in-all though, a 'useful' event and certainly better than last winter!

Martin.



--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

A fascinating and absorbing set of reports... thank you for those.
It was particularly interesting to hear of your snow accumulating
at a similar rate to that of Romsey until around 1000Z when our
depths took a departure. Our level continued to climb to 12cm
in sub-zero temperatures while yours struggled to maintain 6cm
due to the slightly loftier temperatures in closer proximity to the
English Channel. It's amazing what even half a degree Celsius
difference can make.

Melting the snow up to 6pm has yielded 13.6mm of equivalent
rainfall for this event.

I note you were up even earlier than me this morning... by about
an hour.

Nigel