UK weather: Thunderstorms and intense rain as Met Office issues three yellow weather warnings

Over a month’s worth of rain could strike in just 12 hours over the weekend, as the Met Office issues yellow weather warnings for large areas of England and Wales.

Flooding, power cuts and travel disruption are also possible, as the UK braces for three consecutive weather warnings lasting from Saturday morning until 11.59pm on Monday.

The Met Office warns that train delays are possible in the worst-affected areas.

Until close of Monday, there is a risk of businesses and homes being flooded, communities being cut off by flooding and power cuts affecting businesses in areas within the weather warnings.

Saturday thunderstorms

Saturday’s weather warning for thunderstorms covers all of Wales, southwest England and large parts of the Midlands and southern England.

Saturday’s weather warning for thunderstorms covers Wales and the south east (Met Office)
Saturday’s weather warning for thunderstorms covers Wales and the south east (Met Office)

“Scattered showers and thunderstorms” are expected to spread northwestwards from southern England - but many places will remain dry without seeing storms.

The most intense storms will be accompanied by hail and lightning, the Met Office said, particularly going into Saturday afternoon and evening in areas of the Midlands, western England and east Wales.

Sunday rain

A weather warning for rain will come into place at 12am on Sunday, covering a similar area but barring Wales’ northern coast.

The forecaster warns that some areas may receive up to 80mm of rain over the course of 12 to 24 hours - roughly matching the September average for rain in the UK.

The Met Office says: “Showers and thunderstorms are expected to merge into broader areas of heavy rain across parts of Wales, central and southern England during Sunday.”

The weather warning for rain shifts slightly going into Sunday (Met Office)
The weather warning for rain shifts slightly going into Sunday (Met Office)

East Wales and west-central England are expected to be the most severely impacted areas, while the southwest can expect heavy rainfall during the early hours.

“The areas of heavy rain are likely to continue pushing north and west, becoming slow moving across some northern and possibly eastern reaches of the warning area during the rest of Sunday,” the forecaster added.

Monday rain

Going into Monday, the weather warning will expand to cover the majority of England and Wales.

Southwest England, western Wales and the most northerly parts of England will avoid the yellow weather warning for rain.

The worst-affected areas could see as much as 100mm of rainfall in 12 hours.

Monday’s weather warning could see up to 100mm of rain in the worst-affected areas (Met Office)
Monday’s weather warning could see up to 100mm of rain in the worst-affected areas (Met Office)

Two flood warnings and 25 flood alerts are also in place, mostly in the South West, Norfolk, and the Thames and Wye estuaries.

A flood warning is the second most severe of the cautions issued by the Environment Agency, meaning that flooding is expected.

A flood alert is the least severe of the cautions, meaning flooding is possible.

Somerset coast at Porlock Weir and Wye Estuary at Brockweir are both currently under flood warnings.