This could have been nasty...

[oldharry]

... if it had happened 12 hours later!

Chimet Friday night:

 

[nathanlee]

Yikes. Do you think perhaps faulty equipment, or an electrical spike?

Any weather geeks care to explain where a sudden, short lived pressure differential like that would come from?

 

[oldharry]

Very localised, I am only 5 miles away, and my anemometer shows no record of it, although a similar general wind pattern. Could be a local vortex came through - its the right conditions for it with a strongly turbulent airstream. Would have been fun for the Hayling racing fleet if it had happened this morning!

 

[Sans Bateau]

Its gone off screen now, I saw this earlier, at the same time there was a significant wind shift.

 

[tokoloshe]

Just some old fart.

 

[Barnacle Bill]

Probably a squally shower? Localised, shortlived. Was the upper atmosphere very cold?