Heavy rain and strong winds are expected during the second named storm to hit in two days, with gusts of up to 80mph forecast.
While the worst of Saturday's weather is forecast to be felt in areas covered by warnings, heavy and persistent rain is expected across larger parts of the UK.
Later in the week, high pressure is expected to build over the near continent, bringing a return to drier, calmer and more settled conditions.
Strong winds are forecast to continue into Sunday, although rain should gradually ease across most of the country.
Sunny spells and blustery showers are expected elsewhere, while north-east Scotland is likely to see the most persistent rainfall.
The strong winds and heavy rain disrupted travel with fallen trees blocking railway lines and roads.
The storm brought down trees, disrupted transport services and left thousands of properties without power.
The storm could bring significant travel disruption, further power cuts and localised flooding.
Presenter battles strong winds as Storm Austen hits Newquay.
The warning follows Storm Austen, which battered parts of the UK just a day earlier with wind gusts exceeding 75mph.