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Met Eireann warned of a big winter change from the middle of the week, as temperatures will drop to -3 ° C overnight.
There is a yellow status rain warning for Connacht, Cavan, Donegal, Clare and Kerry until 2pm this afternoon.
Experts warned that heavy downpours “may cause some rivers and localized flooding” in some areas.
And as the week progresses, Met Eireann expects a very cold air mass to enter.
They wrote on Twitter: “There are more established conditions starting in the middle of the week, but it will be quite cold. Here is a forecast graph for Wednesday at 12:00 showing the geopotential heights of the 500 hPa pressure level. The lower the height, the colder the air mass. “
Meanwhile, lows of -3 ° C are expected overnight on Friday, with several nights in a row of freezing temperatures.
A forecaster from Met Eireann said: “This morning, heavy rains will continue in the north and west with a continuing risk of surface and river flooding. The rain will move east into the afternoon, followed by scattered showers from The west. Mild at first with morning temperatures of 9 to 11 degrees, but the clearing of the rain will bring much cooler conditions, with temperatures generally dropping to between 4 and 7 degrees during the afternoon. Fresh to strong south winds they will soften later, from light to moderate.
“Dry in most areas tonight, except for scattered rains in the west coast counties. It’s getting cold with lower temperatures of 0 to 4 degrees with frost and possibly some patches of ice with a light breeze from the southwest to west.
“The frost will clear until tomorrow morning, leaving a mostly dry day with isolated showers and long periods of sunshine. Cool and crisp with highs of 7 to 9 degrees with a light breeze from the west.
“Cold, clear and mostly dry Wednesday night with haze and patches of fog forming on a light northwesterly breeze. Widespread frosts will develop with lower temperatures of -2 to +2 degrees.
“It will continue to be mostly dry Thursday with haze and fog lingering in some places during the day. However, long periods of sunshine will also develop in some places. Quite cool with maximum temperatures of 5 to 8 degrees with variable light breezes.
“Another mainly dry but cold and icy night. A dense fog will develop in places where conditions are almost calm. The lowest temperatures generally from -2 to +3 degrees.
“A cold day on Friday with persistent frost and fog in the morning. However, it will remain mostly dry, except for the rains in the northwest, with spells of sunshine during the day. Temperatures generally reach between 3 and 6 degrees in sunlight. east or variable breezes.
(Image: Niall Carson / PA Wire)
“The cold continues on Friday night with lower temperatures of -3 to +1 degrees. Mainly dry with clear periods, but isolated rains will develop overnight.”
And as we get closer to the weekend, it will stay cold overnight with more frost possible, but it will remain largely dry.
One forecaster added: “A mix of sunny spells and scattered showers on Saturday. A cold start to the day will give way to slightly milder conditions from the south with temperatures higher than 7-11 degrees with a light breeze from the east.
“Current indications are that it will stay a bit colder than normal for Sunday and into next week, with a few more possible frosts. It will remain largely dry also with scattered rains.”
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