Friday, 26 March, 2021
Forecasts for Ireland
TRENDS for week of 26 Mar to 1 Apr 2021 --
-- Temperatures will average 1 to 3 deg below normal values.
-- Rainfall will total about 75% of normal in the west and north, to 25% in the southeast.
-- Sunshine may eventually catch up to normal amounts later in the period. It will be quite windy today and Saturday, moderately windy thereafter.
TODAY will be cold with passing mixed wintry showers. Some of the more vigorous showers could have hail and thunder, and other mixed forms like snow pellets (the faster they fall, the less time they have to melt). There will also be breaks in the overcast and sunny intervals, those probably longer in Leinster and Munster. Highs only reaching 5 to 9 C, and temperatures prone to falling to near freezing during any heavy mixed showers, which may leave some higher elevation roads slippery from snow or hail covering from time to time. Winds southwest to west at about 50 to 80 km/hr adding considerable chill (although the late March sun has the opposite effect).
TONIGHT will continue windy and cold but most of the mixed wintry showers should die out for a while, if any persist they could turn to steady light snow on hills. Lows -1 to +3 C.
SATURDAY will have slowly rising temperatures all day continuing into the evening and overnight hours, as much milder air from the Atlantic gradually replaces this cold sector, with temperatures likely to be around 6-9 C mid-day and up to 10-13 C in the late afternoon and evening. Winds southwest 50-80 km/hr and some higher gusts likely in Connacht and west Ulster. Occasional rain will develop in those areas, but it may stay fairly dry in the southeast.
SUNDAY will be breezy and quite mild in most areas, highs 12 to 15 C, possibly a bit lower in north Connacht and most of Ulster at 8-10 C. Winds southwest 40-70 km/hr. Some outbreaks of drizzle or light rain near a frontal band across the north, probably staying dry in some parts of the south however.
MONDAY will be mild too with some sunny breaks, a few outbreaks of light rain crossing northern counties, and highs reaching 12-16 C in many areas (9-11 C north).
TUESDAY the south will start out in that milder air mass but much colder air will press in rapidly from the north, anywhere that makes it to 10 C will probably fall back to about 7 C which will be typical for most of the northern half of the country, in partly cloudy skies. A few showers along this front might linger near the south coast until near the end of the afternoon. Winds turning northerly at 40-60 km/hr.
WEDNESDAY will be quite cold with north to northeast winds, lows -2 to +3 C and highs 5 to 9 C, some chance of a few mixed wintry showers over higher ground, but also some sunny intervals.
THURSDAY will also be rather cold with frosts and highs reaching about 8 to 10 C.
The guidance at present has diverged a little on the details of the cold spell after that, some indications that a more moderate wedge of high pressure will save parts of the Easter weekend from being exceptionally cold, but this is no guarantee as other guidance resists this change, and in any case, it would be a brief interruption with unseasonable wintry chill returning at some point around Easter Sunday in any case. That could persist into part of the following week before there is much moderation. Anyway, lots of time left before this becomes an immediate forecast concern and some chance of it totally changing to a different outlook the way the models have been performing in recent months. (maybe they caught a virus?)
My local weather was partly cloudy with passing showers, some of them mixed (although not as windy as you have it today, basically the same weather set-up here). Highs were in the range of 5 to 10 C by elevation. The snow line has crept up to around 700 metres now with the first spring flowers showing up in the valley, something we won't be seeing up here for at least a month. Our elevation difference of 500 metres produces the same weather differences as you would associate with going north for about five hundred kilometres.
Anyway, stay safe if you have to drive anywhere today, conditions could be changeable and especially so if you're located in the west or north.