Tuesday, 26 October, 2021 Forecasts for Ireland

TRENDS for the week of 26 Oct to 1 Nov 2021

Courtesy of Irish Weather Online

Temperatures will average about 2 deg above normal values. It will however turn colder near the end of the interval. Rainfall will amount to 75 per cent of normal values on average (some uncertainty after Friday however). Sunshine will also be around 75 per cent of normal values. Winds will continue to be moderate from the southwest much of the time, sometimes a bit stronger by the weekend.

FORECASTS

TODAY will be mostly cloudy and very mild with some brighter intervals possible in the south and east around mid-day. There will be brief drizzly showers across some parts of the west and north mainly, a few of these could appear elsewhere. More organized rainfall will arrive late in the day. Winds south to southwest 50-70 km/hr except 60-90 km/hr near Atlantic coasts. Highs 16 or 17 C, possibly 18 C where any sunshine develops.

TONIGHT will continue very mild with occasional rain (5-10 mm) and a steady southwest wind 40-60 km/hr. Lows 12-14 C.

WEDNESDAY will be partly cloudy to overcast with outbreaks of rain, some becoming heavy later in the day across the south central counties into the southeast where 10-20 mm could fall in some places. Highs 14-16 C.

THURSDAY will be partly cloudy to overcast with a few showers and somewhat cooler, lows near 7 C and highs near 13 C.

FRIDAY will be partly to mostly cloudy with scattered showers, lows near 6 C and highs near 12 C.

SATURDAY could get a bit breezier again with some chance yet of a more developed low pressure system, but for now we will go with overcast and rain with moderate south to southwest winds at times, lows near 7 C and highs near 13 C.

SUNDAY will be partly to mostly cloudy and breezy with showers, lows near 7 C and highs near 12 C.

MONDAY (1st Nov) could turn a few degrees colder with strong west to northwest winds at times, passing showers that might turn to hail and temperatures slowly falling in the range of 7-9 C.A few colder days are then indicated in current guidance (which I don’t entirely trust by the way, reason being strong development of low pressure off the U.S. coast and possible longer term results of that). If the guidance is correct then it will be around 5-7 C daytimes and -2 or so at night, with the chance of wintry showers in higher parts of the north.

This storm developing off the east coast of the U.S. overnight has some chance of acquiring subtropical storm status but whether it does or not, very strong northeast winds (80-130 km/hr) will develop in the Boston to New York City region and locally heavy rainfalls of 150-250 mm, as the low is predicted to perform a counter-clockwise loop off Long Island later today and early Wednesday, then move off into the Atlantic, to be followed by a second rather active frontal system now in the central states. All of this action further west from Ireland makes me a little reluctant to put all the chips down on any current forecast options beyond about Friday.