Issued: 0900hrs Tuesday 24th July 2012
Duty forecaster: Simon Keeling
The hot weather in more southern areas of the past few days is going to be fading away as conditions becoming much cooler. Indications are that the weather turns more unsettled as the jet stream becomes established once again.
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A complex area of low pressure takes over the weather across the UK and Ireland on Friday. This brings outbreaks of showery rain over central and eastern England, this turning to scattered showers in the afternoon. Further cloud and some showers in Ireland and Scotland. The best sunshine in Wales, northwest England and southwest Scotland in the afternoon, and cooler everywhere. Highs at 23C in southern England, 17 to 20C for most other areas.
Low pressure is to the east of Scotland on Saturday. This brings an unstable and cool northwest flow across the country. Best conditions will be in the far south of England. Elsewhere a mix of sunshine and showers. The showers heavy at times in the north and west, with the chance of some more persistent rain i the far north of Scotland. Highs at 21C in southeast England, 14C in northern Scotland.
Low pressure will be east of the country, with a ridge of high pressure building to the west. Sunny spells and mainly dry to start the day, but then showers will be developing. The showers could become heavy at times in central and eastern areas as it turns drier to the west. Highs at 12 to 20C.
A ridge of high pressure builds eastwards on Monday. This should bring a mainly fine day with good spells of sunshine. There is a low risk of a shower in the far east of England and Scotland, but for most the day should be dry. Highs at 15 to 21C.
Lower pressure looks set to be taking over the weather in the UK and Ireland on Tuesday. This could bring periods of rain or showers, most in the south and west. Highs at 14 to 19C.
Conditions look to be unsettled on Wednesday. Low pressure over Scotland will be bringing cloud, showers or longer periods of rain to most. Highs around a cool 12 to 19C.