Weather maps indicate that the UK could experience a three-day heatwave later this month, with temperatures in 13 counties expected to reach 31°C or higher. The GFS weather model shows a rise in temperatures starting on June 17, peaking on June 19 when the mercury could hit 32°C in the south-east of England.
The Met Office has noted an increased chance of heatwaves over the coming months, following last month's record-breaking temperatures. The official heatwave threshold varies by region, from 25°C in northern areas to 28°C in the south-east. According to the GFS model, temperatures are forecast to exceed these thresholds for three consecutive days from June 17 to 19, which would constitute an official heatwave.
The warmest day is expected to be June 19, with highs of 30°C or more across large parts of England. The south-east is likely to be the hottest region, with 32°C possible. The 13 counties predicted to see temperatures of 31°C or above are all in England, though details of specific counties were not provided.
The Met Office's long-range forecast for June 18 to July 2 suggests that southern regions may become hot, but there is also a risk of thunderstorms. The forecast states that while the start of the period will be relatively settled with high pressure, low pressure may bring heavy showers and thunderstorms towards the end of June, particularly in the south.
