British Isles weather, July 2017

The 29th was an unsettled day, dominated by an area of low pressure located close to NW Scotland. Nw areas, including Ireland, were showery but it was largely dry in E Scotland and for most of N Wales and N England. SE England had some overnight rain, and then further rain spread NE across S England, and later into Wales and the Midlands; this was associated with a shallow low and its fronts - centre 1002 mb over the E Midlands at 2400 GMT. (Manston 23.1C, Dalwhinnie 12.5C maximum, Aboyne 4.8C minimum, Achnagart 49.0 mm, Boulmer 7.9 h.)

Cyclonic conditions continued to prevail on the 30th due to low pressure centred just to the W of Scotland throughout the day. The SE corner of England had a warm night under a weak warm sector. Early in the day it was showery in the N and W and wet over much of England and Wales, with particularly heavy rain affecting parts of Surrey, London and surrounding areas, turning thundery as it approached the Essex and Suffolk coasts. The rain cleared towards the NE after dawn and a showery day followed in most areas. A few showers turned thundery in the afternoon, especially over Northern Ireland and parts of E England. A persistent convergence zone over the centre of Cornwall and Devon led to prolonged heavy showers, and a stream of showers was carried into the S Midlands. The best of the sunshine was to the SE of London and on Orkney. (High Mowthorpe 21.7C, Fair Isle 15.2C maximum, Katesbridge 7.8C minimum, Okehampton 84.2 mm, Kirkwall12.2 h.)

Persistent low pressure on the 31st to the W of Ireland led to another day of widespread sunshine and showers, particularly towards the W and NW of the British Isles. Some of the showers turned thundery in NW areas and many showers tracked from the SW across the Midlands, with SE England remaining largely dry. (Cavendish 23.8C, Fair Isle 15.2C maximum, Kinbrace 5.9C minimum, Lake Vyrnwy 21.4 mm, Guernsey Airport 13.1 h.)