In message , Philip Eden
writes
0850z WSW F2-3 70km 3Cu025 3Ci300 18.1/09.0 1017.6
RMK: Sun broke through at 07z ... much more Ci visible earlier
with a weak solar halo at 08z. Trying to identify horizon visible
bearing 280deg between slightly nearer hills - it seems to be the
flank of the Cotswolds in the vicinity of Stow-on-the-Wold
which is 70km away.

Philip Eden
Whipsnade 214m

You have a rather better selection of visibility points than I have,
Philip. The furthest object I can see from the house/garden here is the
top of an electricity pylon all of 2 km to the SW! All my visibility
reports are estimates based on the apparent clarity of the air. The lie
of the land and the proliferation of mature trees around here means that
in most directions the furthest objects that can be seen are in the
100-500 metre range.

Norman
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England