This spreads NE through Ireland and the United Kingdom during Wednesday morning rush hour and further rain hits Northern Ireland and Scotland in the afternoon.
Meanwhile, there's still a Status Yellow wind warning in place for the rest of the country valid from 5am on Wednesday until 4pm on the same day. Heavy rain is also expected from midnight until around 7am.
"The rain warning is not as widely distributed as the wind warning".
"We can expect 20mm to 40mm to fall elsewhere across the country". There's uncertainty about just how deep this area of low pressure will be, just how potent it will be.
"A spell of wet and windy weather is expected, with a small chance of very strong and disruptive winds".
Met Office meteorologist Sarah Kent said: "I would think twice before going out on Wednesday". Here's how:Conditions are expected to turn wet and windy from Tuesday afternoon, with the storm officially arriving on Wednesday.
Lion Air pilots tried frantically to stop nosedive
Investigators have not located the jet's cockpit voice recorder, which could provide insight into the pilots' last actions. They reported the issue to Lion Air, which checked the 737 and approved it for its final takeoff the next day.
The gale force winds could lead to damage and cause disruption to transport networks, the warning states.
"That will clear slightly this evening but there will be more unsettled weather overnight with more warnings likely to be issued".
"On Twitter, weather service WXCharts wrote: "#StormDiana will sweep through Ireland and the British Isles tomorrow with severe gales (touching storm force along exposed coasts) expected.
Arctic air will bring the festive chill, risking significant snowfall and a white Christmas, forecasters have said. But drier, less windy weather, with bright spells and scattered showers over Munster will extend countrywide this afternoon.