24 February, 2018
The cold spell will start this weekend, with temperatures rising no higher than 8 degrees during the afternoon on Friday and dropping to as low as -1 at night.
"Over the coming days our weather will becoming increasingly colder as winds push west from Siberia".
"Disruptive" snow showers have been forecast from Tuesday onwards, particularly in the east and southeast, which means there is possibility that some schools might be affected.
Overnight temperatures will drop significantly to -5C.
The Beast from the East will blow in high winds and snow for Yorkshire this week..
The weather will get colder as we head out of February.
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"This happens because we will have a prevailing westerly wind, when it arrives winds tend to separate and change track before meeting again from opposite directions".
More specific forecasts, with colour-coded snow and ice warnings, are expected to be issued by Met Eireann in the coming days.
The national forecaster warned of potential disruptions to power lines, roads, railroads and even cuts to mobile phone services.
The Met Office's chief forecaster said: "There is a lot of uncertainty in the extent and timing of snow during Tuesday".
Snow is also possible with the a risk of some wintry showers in some eastern and southern coastal counties and some may be of snow, but mainly dry elsewhere. On Sunday night, temperatures will fall to as low as -3C overnight with a widespread sharp to severe frost.
Wednesday will see some more snow showers.
For the rest of the week, temperatures will remain cold but will rise above freezing for the rest of the week.