Strong winds and a chance of coastal flooding are expected when Storm Brendan hits Ireland tomorrow.
Mr Saunders added the severe conditions could cause travel disruption, and those in affected areas are advised to take extra care when driving on exposed routes such as bridges or high open roads.
A Met Office spokesperson said: "Gusts of 40 to 50mph are expected quite widely inland, with exposed coasts and hills having gusts of around 60 miles per hour, perhaps locally 70mph".
The wind warning will remain in place until 9pm tomorrow evening. However, at 3pm on Sunday the forecaster extended the warning to the entire 26 counties.
The Met Office put yellow weather warnings of strong winds in place for parts of the United Kingdom from midday on Monday to midnight.
"There is a significant risk of coastal flooding due to the combination of high spring tides and storm surge".
- some short term loss of power and other services.
A yellow weather warning has been issued elsewhere across the country.
Forecasters are predicting that winds will reach speeds of up to 54mph in Portsmouth and will be strongest in the evening.
On its website, the meteorological service warns: 'The strongest winds are expected around exposed coasts and hills.
'Inland gusts of 45-55 miles per hour are more likely.
They advise that "Heavy rain at times will be an additional hazard".
The areas impacted by this warning are East Midlands, East of England, London and South East England, North East England, North West England, South West England, Wales, West Midlands and Yorkshire and Humber.
"Winds will ease from the west during Tuesday night".