On 2 Nov 2006 06:21:26 -0800, wrote in
ups.com

As far as I'm aware a temp of 0.0C has *never* been recognised as a frost.

Perhaps you would care to convey this information to the authorities
that grit your roads.

0C is the melting point of ice, not the freezing point of water. Thus for
water to freeze it must be colder than the melting point of ice i.e. below
0C.

Quote "When the temperature as measured in this way falls below 0.0 deg C,
then an AIR FROST is recorded" from Martin Rowleys FAQ site:

http://homepage.ntlworld.com/booty.w...Q/2A.htm#2A.14

--
Mike Tullett - Coleraine 55.13°N 6.69°W posted 02/11/2006 14:46:38 GMT