"There will be widespread showers through the night", according to Met Éireann. Heavy rain is forecast from 6pm Saturday and all through Sunday.
Dan Holley, forecasters at Weatherquest, said Ciara had produced "the most widespread gales in the United Kingdom since 15th January 2015". Strong winds of 70-80km/h are expected, with heavy rainfall (10-15 litres per square metre).
Two existing yellow warnings for wind and rain are still in place.
Forestry England hopes the routes will be reopened within days, but is also waiting to see how Storm Dennis affects the trails this weekend.
London and the south-east will experience windy weather that could be as strong as 50mph inland and reach up to 60mph in coastal areas. "Some snow accumulations possible before morning, mainly across the north and on higher ground elsewhere".
It warned of likely power cuts and said cancellations to public transport and hard driving conditions were likely. Although Storm Dennis is now not expected to be as severe as Ciara, disruption is still likely.
A countrywide Status Yellow snow/ice warning expired at 10am on Wednesday morning but it didn't take long for Met Eireann to issue a fresh one for 11 counties.