I checked out the Wetterzentrale's NWP synoptic chart for today - Thursday,
and scrolled across to see a deep Atlantic low hitting the Canary Islands.
Checked this evening , westernmost La Palma must have seen the cold front,
with Nlies, whilst still SWlies (unusually) on the other islands.

Should top up the water supply a bit!

Earlier on I was visiting Tenerife and there was an interesting bit of
weather; 4-5 Febraury daytime max were reaching 28C at sea level: 26C a
very. rough recording at 500m in the north, near Tacoronte (3m from North
airport). The nights and mornings there were characterised with a very
strong easterly, and poor visibilty. Interestingly elsewhere there did not
seem to be the same strength of wind, maybe a Tenerife Helm Wind, with some
extra Algerian dust?

Dorian