Joe Hunt wrote:

A polar low is evident on IR and VIS pics now, pretty much centred over
Shetland.
Sumburgh reports -

METAR EGPB 281120Z 03008KT 0300 +SHSN VV/// M03/M04 Q0993=
METAR EGPB 281050Z 35010KT 2500 -SHSN BKN010CB M02/M04 Q0994=
METAR EGPB 281020Z 33021KT 9999 FEW014CB FEW018 SCT035 M01/M05 Q0994=
METAR EGPB 280950Z 35020G30KT 9999 VCSH FEW014CB SCT034 M01/M06 Q0995=

http://www.west-cheshire.ac.uk/weather/meteosat/d2b.jpg

Joe

Yes, we had a 40-minute spell where the wind dropped to about F2 from
F6-7, and we had moderate snowfall with visibility 200m. Thereafter it
cleared quite quickly to bright sunshine, and wind began to pick up quite
briskly. We now have drifts 1 metre in the lee of walls and brows.

In the last few minutes moderate snowfall with drifting again, wind about
F6. Visibility has been about 100 m. No planes to mainland UK today, and
ferry service to Aberdeen disrupted as well. There will be quite a backlog
of passengers to clear (200 for the ferry alone), as there have been a lot
of visitors & musicians in Shetland for the Up-Helly-Aa fire festival in
Lerwick last night. Dancing would have been finishing at 13 venues about
07:30.

Maurice