Rain and strong winds are expected on Sunday – ending in a washout for large parts of the country.
Winds will increase throughout the morning with gusts up to 70mph in exposed areas, the Met Office says.
Zoe Hutin, a meteorologist at the forecaster, said Sunday is expected to be the “worst day” before conditions improve.
“The wind warning itself for the mainland UK ends at 6pm, but we can expect to continue to see quite blustery conditions even into the evening as the mainland rain itself pushes through.”
She added: “By the time people get up on Monday, we’ll still have some of the residual rain from that front in the far south-east of the country, and quite cloudy across England as well.
“But actually elsewhere, it could be a decent start.”
The Met Office’s yellow weather warning for much of England and Scotland came into force at 6am and is expected to run until 6pm on Sunday.
A separate yellow warning for Northern Ireland came into force at 3am and runs until 3pm.
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People who have noticed some slightly higher temperatures the last couple of days may be dismayed at the latest predictions.
“Through the week, those temperatures are trending back down,” Ms Hutin said.
“And so it will be getting cooler each day, but they will actually just be recovering to around average for the time of year. So it won’t be cold.
“It will just be returning back to where we would expect to be for this time of February.”
