"Norman Lynagh" wrote in message
s.com...
Col,

A total guess but it is possible to visualise a synoptic situation in
which very warm air was advected NW'wards from far SE Europe to southern
Scandinavia then westwards to the Shetland Islands without affecting
other parts of the British Isles.

Before posting the above I have just remembered that the reanalysis
charts available on the Topkarten site go back that far. These show that
there may have been advection of low-level air from the vicinity of the
Black Sea, much as I have described above.


Just after I posted that I remembered about those archives and took
a look at that date. It didn't make sense at all. The only reason for this
that I could possibly imagine as being feasible was after a protracted
heatwave over the UK a cold front pushes north over Scotland and
somehow a wedge of hot air still manages to be at 28C over Shetland.
But the charts for the previous few days didn't suggest a heatwave at
all, just cool, wet and cloudy low pressure conditions.
Looking at the charts now considering what you have said, I can see
what you mean. The charts for the 4th/5th perhaps show the airflow better.
Even so it must have been an incrediably hot airflow for it still to be at
28C in Shetland after crossing the Norwegian Sea.
--
Bolton, Lancashire.
160m asl.
http://www.reddwarfer.btinternet.co.uk