TRENDS for the week of 5 to 11 April, 2021
-- Temperatures will average 3 to 5 deg below normal values.
-- Rainfall will average 25 to 50 per cent of normal, in fact this
should be precipitation because part of it could take on wintry forms.
The higher portions will likely be in Ulster and north Connacht.
-- Sunshine will average about 75 per cent of normal, somewhat lower in
the north. Winds will increase to moderate and remain in that range most
of the interval, infrequently gusting to strong levels, and
occasionally dropping off to light inland.
FORECASTS
TONIGHT will be partly cloudy and very cold with a few more wintry
showers in places, some accumulations of snow likely on higher ground in
the north. Lows -3 to +1 C. The moderate northwest winds will continue
in most places dropping off well inland.
TUESDAY will continue partly to mostly cloudy and cold with scattered
wintry showers, moderate northwest to north winds (40-60 km/hr) and
highs 4 to 7 C.
WEDNESDAY will turn somewhat milder, after a sharp frost across the
inland south under clearing skies. Lows near -3 C and highs near 9 C for
the south and some central counties. Further north, due to extensive
cloud, the range will be more like 2 C to 7 C, and rain will begin
during the afternoon and continue off and on overnight (5-15 mm
expected).
THURSDAY will see further showers as this front begins to push south,
with lows -1 to +3 C and highs 6 to 9 C. It will begin to turn quite
cold again in Ulster by late in the afternoon, and in other regions
overnight.
FRIDAY will be breezy and very cold with mixed wintry showers, and highs only 4 to 7 C.
SATURDAY morning could be exceptionally cold if skies remain clear, some
guidance suggests lows below -5 C in the inland south and southeast.
The daytime hours will remain quite cold with variable cloud and highs 3
to 7 C.
The further outlook at this point calls for colder than normal weather
to persist; some earlier hints of a more variable regime seem to have
faded in favour of cold dominating and only weak moderations of
temperature between intervals of very cool weather (for mid-April). This
could continue for at least another week.
Peter for IWO