Storm Oscar is on a collision course with Britain and will hit the west of the country this weekend with gusty winds and heavy showers.
BBC Weather forecaster Stav Danaos warned that the new weather front could cause many serious disruptions.
He said, "Friday night, it looks like it's going to be pretty stormy in the west of the country.
"The same goes for Saturday, very windy with rain outbursts.
"And then this secondary low pressure area will arrive on our shores on Sunday.
"As you can see, it will be a wild end of the week.
"This is a Saturday picture. A stormy day for everyone except bright sunshine in the southeastern areas.
"It could stay dry all day here, but it gets more gusty north and west.
"In fact very windy, in fact we were able to detect a break due to the storms in the northwest of the country, and there will be this rain band as well.
"These winds come from the south, so it will be very mild. 14C or 15C down the line.
"And then it will be another mild day on Sunday, with this additional low pressure area moving, but windy with rain."
The Met Office also warned that the outlook for the weekend should dampen the autumn festivals as Storm Oscar breaks in from the Atlantic.
Temperatures are unlikely to double-digit in the coming days as the promise of a milder view wears off.
Met Office meteorologist Aidan McGivern said on the terms, "Just to keep temperatures above freezing in the west.
"But for central and eastern areas in urban cities, temperatures drop to zero, minus one and minus two degrees."
In some areas of the Scottish Glens, the mercury will drop to minus five or minus six degrees, McGivern warned.
He said, "Pretty cold, as we start a widespread freeze on Wednesday through the central and eastern areas.
"And these temperatures are only slowly recovering in the morning."