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Updated on Wednesday 20th November 2024, valid until further notice.OVERVIEW 

• Heavy snow, starting Wednesday night: significant snowfall accumulations expected tomorrow (Thursday 21st), across much of Munster. Heavy rain moving up from the south will transition to sleet and snow tonight (Wednesday) and will continue through Thursday morning, with accumulations of 5cm or more in 12 hours likely. This will cause significant travel disruptions and difficult ground conditions during the day, especially during morning rush hour. A status orange snow warning has been issued for these counties. 
•  Lower snow accumulations are expected in other counties of the west, south-east and midlands through Wednesday night and into Thursday morning, with accumulations of 1-5cm in 12 hours likely, meriting a yellow snow/ice warning. Travel disruptions can also be expected in these areas.  
•  The cause of snow: A low-pressure system skirting to the south of Ireland will bring warm moist air up over cold air at the surface. This interaction will cause the widespread rain brought by the low to transition to sleet and snow in most areas.  
•  Heavy rain possible: The rain may not transition to sleet or snow in all areas of the south, so some surface water accumulations could be expected, leading to localised flooding. 
•  Warnings have been issued to reflect the situation; these may be updated as the situation evolves, as snow set-ups always have a level of inherent uncertainty. 
•  For the rest of Ireland, the cold weather continues, bringing low temperatures, especially at night with widespread frost and ice. Showers of sleet and snow can also be expected, but not at warning levels.  
•  The weekend: We are monitoring the track of another low-pressure system which will bring unsettled weather for Ireland on the weekend. A storm has not been named at this time, but we are closely monitoring the situation.