The high pressure that we now have in place that will be bringing us a fine, settled spell of weather looks like it will come to an end Saturday evening. It looks like it will just about give us enough time to enjoy Saturday daytime before it turns unsettled during the evening.
On Saturday we could see our temperatures reaching 21 centigrade before showers arrive during the evening and night.
During Friday the 20th the air pressure will be around 1025 hpa. During Saturday the air pressure will start to fall with the high pressure moving eastwards over Europe. During Saturday the air pressure will continue falling and by Sunday the air pressure could be around 1008 hpa. This would be quite a drop and we will see some heavy showers and becoming a little breezy.
The timings could change a little but the signal for change is there.