0900Z: 12001KT 40km 1AC120 5CI250 -5.1/-5.8 QFF 1001.9 falling.
SYNOP: 42982 51201 11051 21058 40019 56015 81032 333 81362 85075=
Hard frost last night, ground frozen solid, although only slight hoar deposits. Lying snow persists, depth currently 7 cm, although it melted from the lanes yesterday. Generally small amounts of cloud overnight. Currently there is a trace of thin altocumulus and a bank of dense cirrus to the SW extending overhead. Very good visibility. Surface wind light and variable overnight, although there was a period 2130-2315Z where it became WSW F2-3, very similar to Tuesday evening - perhaps some sort of katabatic flow?
20/0900Z to 21/0900Z:
Max: 3.6 (1300Z)
Min: -5.9 (0745Z)
Grass min: -8.1 (2048Z)
Concrete min: -4.9 (0606Z)
30cm temp 0900Z: 8.1
Rain: Nil