How to read this map
The map displays mean sea-level pressure (MSLP) in hPa. Closed isobars help identify organised highs and lows, while tightly packed lines indicate a stronger pressure gradient.
- Lower pressure often accompanies more unsettled or windy weather, but it does not by itself guarantee rain.
- Closely spaced isobars indicate a sharp pressure change over a short distance and usually favour stronger winds.
- The position and path of a low are often more important than its exact central value.
Using the map
Use the timeline to follow each system. Zoom in and select a point to display its forecast value.
Important note: Pressure is only one part of a forecast. Check the rain, snow and wind maps as well as official warnings when disruptive weather is possible.