More dynamic weather expected in second half of August as rain finally returns to the UKAnother heatwave is expected to dominate the UK's weather this week, but there are growing signs that the long-standing weather pattern could finally begin to shift. Why the weather pattern could finally changeFor weeks, high pressure has repeatedly become established close to or across the UK, forcing Atlantic weather systems to track well to the north. Although details will inevitably change at this range, it marks the first indication that Atlantic weather systems may begin making greater inroads across the country. Temperatures are expected to remain above average even as Atlantic weather systems begin returning later in the month. Rain could become more frequent later in AugustLong-range guidance suggests further weather systems may affect the UK during the second half of the month.