It will come into action at 1pm today.
Rain, snow and hail looks set to hit the capital on Saturday with Met Office forecasts suggesting a 60-90 per cent chance of the white stuff landing.
Wrap up warm if you're heading out..
Freezing air from the north-east clashing with Storm Deirdre, the forth tempest of the year named by Met Eireann, is causing the severe weather across Ireland and Britain.
What does the Met Office say?
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Another amber warning predicts potential blizzard conditions bringing disruption to transport and infrastructure in central and Northern Scotland between Saturday and Sunday mornings. Forecasters are also warning of freezing rain sweeping in from the east, which is likely to lead to black ice across roads and pavements.
Temperatures will barely go above freezing..
This freezing rain, which is rare in Scotland, will likely change to snow before it dies out.
They add: "It can form very quickly, it can be hard to see and is incredibly slippery".
What is a weather warning?
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In addition, an amber warning for ice has been issued for the area west and south-west of Dundee.
"I would encourage people in the affected areas to consider whether they need to make their journey".
A status yellow rainfall warning also remains in place for the country with up to 50 millimetres of rain expected.
When supercooled droplets eventually strike cold ground they freeze on impact, creating a glaze of ice.
It adds that there is the possibility for travel delays on roads, stranding some vehicles and passengers, as well as delays or cancellations to rail and air travel.
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