How low can you go?

The barometer has dropped down to 970 mb which is 10 mb past "stormy" which I guess makes it very stormy.

However just now outside it is looking quite peaceful, a bit gloomy but not particularly windy or wet. According to the UK pressure chart I am at the centre of the low.

The barometer is suggesting it will shortly come on to a blow and it is time to batten down the hatches. I hope its not like the other night, the wind was so strong against the window I kept dreaming about trains rushing by.