TRENDS for the week of 12 to 18 April 2021 --
-- Temperatures will average 1 to 3 deg below normal values.
-- Rainfall will average 25 per cent of normal.
-- Sunshine will average 75 per cent of normal, to near normal (higher values in south and west).
-- Winds will be generally rather light during the interval, with calm nights quite frequent.
FORECASTS
TODAY will be mostly cloudy, with the best chance of any brighter intervals in the southwest. Some light rain will develop from north Connacht and west Ulster towards the midlands and Leinster, with 5-10 mm amounts expected. It will be somewhat milder than the weekend but not yet up to mid-April average values, highs 10 to 12 C.
TONIGHT will be cloudy with a few remnant showers, lows 4 to 6 C.
TUESDAY will become partly cloudy after a few isolated morning showers, partial clearing during the mid-day period and perhaps sunny in places by afternoon, highs around 11 to 13 C.
WEDNESDAY will be partly cloudy with isolated showers, lows 1 to 4 C and highs 12 to 14 C.
The rest of the week will be similar, partly cloudy or even sunny in some places, a little closer to normal in temperature (highs 12 to 15 C) but cool at night with scattered light frosts returning.
By the weekend, a somewhat cloudier sector of the sluggish circulation around the high pressure will arrive and combine with a weak front trying to push in from the Atlantic. These changes will lead to more cloud and a narrower temperature range (lows 5-7 C and highs 11-13 C) with the risk of some rain in the west.
The week following looks just about the same with bland weather and near average temperatures, but the models are signalling one last cold spell to finish out the month.
Peter for IWO