Storm Gareth's strong gales and heavy rain have been causing disruption, with rail and road links across the country affected.
Winds could reach mean speeds of 50 to 65km/h, with gusts of 90 to 110km.
The north-east recorded gusts of almost 60mph as Storm Gareth hit.
Storm Gareth was initially expected to hit the county at 9pm but the Met Office has now put the warning in place from midday.
The deep area of low-pressure, which will cross to the north of the United Kingdom later on tonight and into Wednesday, has been named Storm Gareth.
Charlotte Russe going out of business, closing all stores
Last week, lingerie retailer Victoria's Secret announced it would close 53 stores due to declining sales. News about the closing became apparent after the company released a statement to USA Today on Wednesday.
Looking ahead to the rest of the week, there will "furthers spells of rain" and strong winds heading into the weekend.
Gusts could reach 80mph today along the coast of Northern Ireland, the Met Office said.
Mr Deakin also revealed that there will be another yellow weather warning in place in the north wets due to the amount of rain on Thursday morning. Showers will gradually ease through the morning, becoming confined to northeast Ulster in the afternoon. The northwest winds will eventually moderate early on Wednesday night, before backing westerly and freshening again overnight.
"There will be gusts of 50 to 60mph inland, and on coasts, up to 65 miles per hour, and this can certainly cause disruption".