These charts of surface pressure, from analysis (T+0) to the 84-hour forecast (T+84) are produced daily around 0730 UTC.
High pressure centred over the Norwegian Sea will
continue to weaken, allowing Atlantic low pressure
systems to advance from the west. Trough lines, marked as
thick black lines on the chart, denote zones where
showers are most frequent and heavy. In these areas the
air is rising quickly to create showers.
Updated: 0730 UTC on Fri 25 Jul 2014