This was a classic cold front passage.
Preceded by:
- dropping pressure
gusty winds
maximum temp reached at 05:30 or thereabouts...
- Temperature nosedives
Dew point nosedives
Wind suddenly makes a clockwise sweep towards north
pressure starts rising
patches of serious rain (today's rain has been corrected at around 11 am - FO saw 2.7mm, the 'manual' rain meter saw 5.4mm)
- Wind speed falls
Wind direction sways back
Sun comes out, but threatened by large quantities of Cumulus and Altocumulus.