Lancashire Met Office weather forecast for rest of the weekend as thunderstorms warning issued for parts of northern England

The Met Office has warned that thunderstorms may cause disruption and localised flooding across northern England on Sunday with more heavy rain forecast for Lancashire.

A yellow weather warning is in force from 1pm to 9pm tomorrow (June 25). It narrowly misses East Lancashire and covers North East England, Yorkshire and Humber, the East Midlands, Dumfries, Galloway, Lothian and Borders, Grampian, Highlands and Eilean Siar, Orkney and Shetland as well as Central, Tayside and Fife.

Some across the UK are enjoying the summer sunshine but could soon see lightning, hail and strong winds, forecasters say. The thunderstorms could cause localised flooding and rainfall will “vary significantly, but some locations could see 30-40mm in 1-2 hours”, according to the forecaster.

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Some places could see hail that is up to 3cm in diameter along with strong, gusty winds. Lancashire is set to miss the worst of the bad weather, however rain will fall across the region on Sunday after a sunshine-filled Saturday.

Rain will sweep in from around midday and last until 5pm before a sunnier evening. The rain is set to continue into the start of next week, with eastern areas including Blackburn the worst affected.

The Met Office said: “Whilst there remains some uncertainty in whether thunderstorms develop as cooler conditions follow from the west, there is a chance that an organised line of thunderstorms could develop across northern Britain during Sunday afternoon before clearing east into the North Sea during the evening. This is more likely to happen across eastern parts of the warning area including northeast England and eastern Scotland.”

It comes as a weekend heat health warning from the UK Health Security Agency and the Met Office covers most of England, which is in place until Monday at 9am. The warning, which urges people to “watch out for those who might struggle to keep cool in the hot weather”, was issued as temperatures were expected to soar to 32C.

Met Office chief meteorologist Matthew Lehnert described the prospect of thunderstorms developing as “finely balanced”.

He said: “It’s worth noting the temperatures in the south will remain quite high overnight this weekend, so it’s important to look out for those who may be more vulnerable to heat.”

He added: “There are some marked contrasts in the UK’s weather this weekend, with some potentially impactful thunderstorms developing affecting the northern half of the UK on Sunday, while further south it will become hot.

“For those in the north, there is a chance of thunderstorms developing as we see a change to cooler conditions with a chance that these could become organised with heavy rain, hail, lightning and gusty winds.”

Five-day Met Office forecast for the region

Saturday:

Saturday morning will start rather cloudy with some hill fog and patchy rain in the north. Skies will gradually brighten through the morning, with plenty of sunshine developing in the afternoon. Feeling warm and humid. Maximum temperature 25 °C.

Tonight:

There’ll be plenty of sunshine this evening, with a fine night to follow. It will stay dry with long clear periods. Remaining warm and humid with a southerly breeze developing. Minimum temperature 17 °C.

Sunday:

Sunday will begin mostly dry with some sunshine. However, showers are likely to break out from the west, which may turn heavy and thundery during the afternoon. Feeling very humid. Maximum temperature 26 °C.

Outlook for Monday to Wednesday:

The early to middle part of next week will be much fresher. There will be some sunshine, although showery rain is also likely, and temperatures will return closer to average.