Atlantic Charts - Precipitation and Pressure
Chart shows forecast pressure and precipitation every 6 hours for 7 days.
Precipitation rate in mm/h averaged over the previous 6 hours. Blue shades show light rain while yellow and red show heavy rain. Precipitation can be rain, hail or snow.
Pressure: Isobars, lines of equal atmospheric pressure, are drawn every 4hPa (hectopascals or millibars). Areas of High and Low pressure are indicated. The closer the spacing of the isobars, the stronger the wind.