On Wednesday, December 6, 2017 at 7:37:48 PM UTC, Norman Lynagh wrote:
I have to say that I'm at a loss as to why the warning for snow and ice
comes into force at precisely 0005 on Friday. Why not at midnight?
Surely there is no pretence that forecasting can be so precise. The
warning start at 0005 on Friday seems at odds with the current Peak
District Forecast for Thursday which says

"Turning drier, brighter and colder during the morning with scattered
wintry showers, snow showers then becoming heavy and more frequent
through the late afternoon and evening. Temporary blizzard conditions
and drifting of lying snow later in the day."

On the basis of that forecast it would appear that the warning should
come into force around 1600-1800 on Thursday, at least for this part of
the country. As is so often the case, there seems to be an absence of
'joined-up' forecasting.


--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
https://peakdistrictweather.org
Twitter: @TideswellWeathr

There's the same warning of snow & ice a fair chunk of Cornwall - including the coastal areas, where the forecast looks somewhat different E.g Padstow
https://www.metoffice.gov.uk/public/...ate=2017-12-08

Even up at Bodmin, the current forecast is for rain showers rather than snow https://www.metoffice.gov.uk/public/...ate=2017-12-08

I think you'll have to be up near the top of Brown Willy to be in with much chance of seeing lying snow in Cornwall

Graham
Penzance