Data supplied by Met Éireann
Today and Tomorrow's forecast
Scattered outbreaks of rain developing overnight, turning more widespread later. Rain will turn to sleet or snow over parts of Ulster towards morning. Lowest temperatures of 1 to 5 degrees Celsius, coldest across the northern half of the country, with values at their lowest after dawn. Fresh southwest winds will veer northwest and increase strong to gale force and gusty. Frost and ice developing later tonight, mainly occurring in sheltered areas owing to those strong winds.
Southwest winds veering west to northwest later tonight and Wednesday, will reach gale force or strong gale force for all sea areas and the Irish Sea.
Issued at 23:00 on 27-Jan-2015
Thursday 29 January
Wednesday will be a very cold and windy day with widespread showers early on in the morning, some of which will be wintry, especially across the north and northwest. Long dry spells developing with some sunshine, however further showers will push down across the country in a strong and gusty west to northwest wind. Scattered showers, later in the day, will turn increasingly to sleet and snow with moderate accumulations, all areas at threat, particularly Ulster. Risk of thunder also. Bitterly cold with an added wind chill effect; highest temperatures of just 2 to 5 degrees Celsius, in the strong and blustery westerly winds.
The wintry showers will continue on Wednesday night, becoming widespread overnight in the moderate to fresh westerly wind. Temperatures overnight will be well below freezing with frost and ice making hazardous driving conditions. The showers will be most frequently of snow overnight, bringing accumulations of several centimetres in many areas, particularly in the west and in the north.
There'll be further wintry showers on Thursday, again frequently of snow. The showers will be most frequent over the hills and mountains of the west and north but all areas are at risk as they will be carried on the moderate to fresh westerly wind, which will veer northwest later. Temperatures will be only around 3 or 4 degrees in the afternoon on Thursday with a wind chill factor added in. Overnight on Thursday night temperatures will be below freezing again but the showers will start to retreat to the coasts of the west and north.
On Friday the showers will become more likely to be of rain and more likely to be confined to coastal counties of the west and north, although there will still be a risk of wintry precipitation over the hills and mountains, and it will still be rather cold, especially over night. Day time there will be some sunny periods in the east and south.
On Saturday and over the weekend, it will continue very cold as the airflow turns northerly. Wintry showers will continue, mainly in exposed northern and western areas with good spells of sunshine and severe frosts and icy roads by night.
Report issued:27/01/2015 22:36