TIMELINE: SATURDAY 17TH MARCH TO TUESDAY 20TH MARCH 2018.
HIGH RISK: LEINSTER, EAST MUNSTER
St Patrick’s day will start off milder in Connacht and SW Munster but as the day goes on it will become gradually colder with highs of 7c along western coasts and 2c/3c along eastern coasts.
A risk of light snow showers in east Leinster and east Munster. After sunset and overnight these showers will increase in frequency, overnight low temps of -2c to -5c.
The timeframe for snow with accumulations remains the the latter half of St Patrick’s Day and overnight into and including Sunday the 18th of March.
Due to the nature of these showers snow accumulations will differ even at a local level and range from 5cm to 20cm.
Most of Ulster, Connacht and SW Munster will remain dry with sunny spells during daytime hours.
SUNDAY 18TH MARCH 2018
Some area’s will wake up to accumulation with highest risk areas, Louth, Meath, Westmeath, Dublin, Kildare, Wicklow, Wexford, Carlow and Waterford. Counties bordering these counties are at some risk of trace or minor accumulations.
Daytime highs of 2c feeling bitterly cold in a strong breeze with a feel like temp of -5c.
Further risk of snow showers developing in Leinster during Sunday with further accumulations possible.
Sunday night will see lows of -7c in some areas with a severe frost across the country where skies clear.
Disruption likely in rural upland communities and on secondary road networks in east Leinster. A risk of disruption to air and rail travel.
Please ensure pets are kept indoors at night from Saturday.
Keep a close eye on all national and local weather forecasts.
Further clarification tomorrow and early on Saturday morning.
NOTE: Snow Chart Depth is a rough guideline.
CONFIDENCE: SNOW: 75%; 5cm to 20cm.
CONFIDENCE: SNOW; 30% 20cm or greater at low level.
CONFIDENCE: 100% Temps.