Forecast Charts.

Colour shows rainfall in the six hours up to each chart’s time: pale blue for light rain (1 – 2mm) through blue, green, yellow and orange to deep red for the heaviest (50mm or more). Grey lines are mean sea level pressure (isobars) every 1hPa, with every 4hPa heavier and labelled. Barbs show the wind at 10m. Thumbnails are simplified (no wind barbs); open a chart to see every detail.

Colour shows the mean wind speed at 10m at each chart’s time: pale green for a moderate breeze (20 – 30km/h) through green, yellow and orange to deep red for severe gales (80km/h or more). Below 20km/h is left clear. Grey lines are mean sea level pressure (isobars) every 1hPa, with every 4hPa heavier and labelled. Arrows point the way the wind is blowing; there is no arrow where it is nearly calm. Thumbnails show fewer arrows and only the labelled isobars; open a chart to see every detail. Gusts are stronger than the mean wind.