'The Beast From The East' will land today. The Siberian airflow is bringing freezing conditions with snow flurries and showers.
A Status Orange weather alert comes into force from 3pm today and remains in place until 11am tomorrow when we'll get a fresh update from Met Eireann.
The warning applies to Dublin, Kildare, Wicklow, Louth, Laois and Carlow.
Snow showers will develop 'more readily' later today with an added chill factor. Tomorrow will be extremely cold. During the day there'll be 'highs' of 2 degrees. Further snow falls are expected.
Thursday is when The Beast and Storm Emma collide, with Met Eireann forecasting "harsh easterly winds and scattered snow showers... becoming increasingly heavy and frequent through the course of the day."
"All areas will see disruptive and treacherous conditions, especially as of evening time onwards. Significant accumulations are likely after dark. Strong easterly winds will lead to blizzard conditions and drifting snow."
Some of Dublin's supermarkets are bringing in extra stock, with Supervalu reporting sales have risen 40%.
Bread and milk in particular are selling out, prompting Tesco to bring in extra deliveries with fears more people will panic buy this evening.