Low Pressure

12 February 2014

West Yorkshire

8.20 p.m.; In the ten or fifteen minutes that it's taken me to draw this barometer, the needle has dropped from 28.6 inches of mercury to 28.5 (968.4 to 965 millibars) and it's gradually heading down below that. It's well into the 'falling' half of the dial and, as it says on the barometer;

'hand moves to left weather deterioration.'

As I write this the needle has just reached the word 'Stormy'. An hour later, as the low passed, the needle started rising again.

The latest infrared satellite image, taken at 7 p.m., shows the great swirl of a low pressure system heading northwest, crossing north Wales, northern England and Scotland.