Some snow has fallen in Northern Ireland on Monday, and parts of the country have also experienced strong winds.
The Met Office have said up to 10cm of snow is expected to fall, with blizzard conditions in some parts.
Snow has been reported in areas including Banbridge, Lurgan and on the Glenshane Pass.
The yellow weather warning is in force until midnight.
On Tuesday morning icy patches are expected in some areas and rain is forecast for that evening.
On Monday the Met Office said: “Heavy showers will spread to many parts of Northern Ireland, turning wintry on high ground and then increasingly to lower levels away from western coasts during Monday night.
“Showers will become aligned into bands orientated west to east, such that some places will have frequent snow showers, whilst others have relatively few. Therefore, accumulations of snow will be very variable, with some places under the shower bands receiving 5-10 cm. Drifting of snow and temporary blizzard conditions may affect higher level routes. Winds will gust to around 50 mph near the heavier showers, but higher over hills.
“The public should be aware of the potential for some disruption, especially to travel.”