The area covered by the warning stretches from Plymouth on the southwest coast right up to the Scottish Highlands, the Met Office said.
According the Independent, Storm Caroline is expected to bring gusts of wind between 100 km/h and 110 km/hr, with the strongest winds expect for coastal areas and high ground.
A Met Office spokesman said: "Snow showers are expected across many other parts of Scotland, Northern Ireland, Wales and western England on Friday".
Heaviest and most frequent of the snow showers will become confined to northeast Scotland during Saturday.
It follows the UK Met Office naming an Atlantic storm which is set to hit Thursday Storm Caroline.
Now, Met Éireann are reporting the severe winds, which are due to affect parts of Scotland, will generate strong and blustery winds over Ireland also.
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A yellow "be aware" warning is in place for Scotland between 08:00 and 23:55 on Thursday.
"On Friday and Saturday, the snow showers could lead to snow accumulations which vary markedly across the warning area".
"The likelihood of snow will increase in the evening and night as temperatures fall to between -2C and 1C".
The forecaster's yellow alert for Friday also warns that icy surfaces can be expected, especially that night.
"Road, rail, air and ferry services may be affected, with longer journey times and cancellations possible".