A largely dry but cloudy day today, there'll be a little light rain or drizzle at times, mainly along western and northern coastal areas. Winds will be light to moderate west or southwest and afternoon temperatures will be between 8 and 11 degrees. Winds will become southwest and freshen this afternoon and early evening when outbreaks of rain develop along the west coast.
The rain will become widespread this evening and early tonight, and winds will increase fresh to strong southwest to west overnight. Temperatures will remain at 8 or 9 degrees for much of the night, but towards morning, as the rain clears, the temperature will fall rapidly to near freezing, the winds will veer to the northwest and wintry showers will develop.
Tomorrow, Wednesday, will be cold and windy with wintry showers in the north and west at first, becoming widespread over the country later, leading to accumulations of snow, especially over hills and mountains of the west and north. Temperatures will be 3 or 4 degrees at best during the afternoon but only 1 or 2 degrees in the north of the country. Westerly winds will be fresh to strong and gusty and gale force at sea.
3 Day Outlook
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.