"John Whitby" wrote in message
...
A screen temp of -3 becomes moderate with wind of only 2 knots, severe
with
9 knots and very severe with wind greater than 14 knots. Terms such as
'penetrating' etc can be used if forecaster deems it appropriate.
Source FRB 1993
Incidentally in Calm conditions 3.5 is moderate, 6.5 is severe and
11.5
very severe.
Terminology may have changed over the years...
Cheers
John
(ps moon still visible here but getting ever hazier)
--
York,
North Yorkshire.
(Norman Virus Protected)



Lets make this an all Yorkshire post shall we........it is snowing here in
Gilling.......25mile due south of the boro



David