Met Éireann has issued a Status Yellow low temperature and ice warning for all counties, with temperatures of -4C expected tonight, as the cold snap hitting the country this week continues.
Freezing temperatures of between 0C and -4C are forecast, with the warning in effect from 5pm this evening until 11am tomorrow.
The forecaster has warned of ice forming on untreated surfaces, leading to treacherous conditions.
A similar warning is also in place in the North for counties Armagh, Antrim, Down, Fermanagh, Tyrone and Derry from 2pm until midday tomorrow.
Temperatures last night dropped to as low as -4.5C in some areas.
Such temperatures were seen in Mullingar (-4.5C), Oak Park in Carlow (-4.3C), and Casement Aerodrome in Dublin (-4C).
Minimum air temperatures overnight at our 25 synoptic weather stations ranged from -4.5°C at Mullingar to 3.8°C at Belmullet. View today's full weather reports from our synoptic weather stations on our Current Observations page https://t.co/MvCx72KIaT pic.twitter.com/x1T4Nwm6ts— Met Éireann (@MetEireann) January 7, 2021
This morning, light sleet and snow spread southwards through the morning, with accumulations of snow in some areas.
AA Roadwatch is asking motorists to reduce their speed as it can take ten times longer to stop a vehicle in snow or ice. Lying snow will very gradually melt today, leading to icy conditions as frost sets in very quickly after nightfall.
Gritting of main roads by local councils has been taking place to lessen the danger on routes where motorists must make essential journeys.
Tomorrow, there will be widespread frost and ice to start, with temperatures struggling to reach afternoon highs of just 3C, according to Met Éireann.
A low temperature/ice warning from 5pm on Thursday to 11am on Friday. ⚠️— RTE Weather (@WeatherRTE) January 7, 2021
Bitterly cold overnight with temps of -4 to -1 degrees. ❄️ Friday will be cold & frosty again with wintry showers in the NW & East. Helen has the details and check out https://t.co/aQG12grbm0 for more. pic.twitter.com/LefLxv5XF1