These charts of surface pressure, from analysis (T+0) to the 84-hour forecast (T+84) are produced daily around 0730 UTC.
Another very unsettled pattern with low pressure developing to the southwest of the United Kingdom. This is set to bring further wet and very windy weather to all parts this weekend. Heavy rain today is followed by very squally showers Sunday.
Updated: 0730 on Sat 21 Nov 2009