The RSA said people shouldn't drive during the red warning - and they should still be extremely careful, even when it passes.
Storm Eowyn is now being predicted to be the worst to ever hit the country.
A red warning comes into effect for the entire country from the early hours of tomorrow.
Public Transport services won't run, schools, creches and colleges will be closed and employers are being urged to plan today for staff to work from home where possible.
The red alert means there is a 'danger to life'.
The Road Safety Authority's David Martin says it's an 'unusual and dangerous' weather event.
He says people shouldn't drive during the red warning - and they should still be extremely careful, even when it passes.
Meanwhile, shoppers are being urged to be prepared for the bad weather but not to go overboard.
Many retailers are expected to close during the Red wind alert tomorrow
Photos of empty shelves appeared on social media during Storm Darragh with shoppers stockpiling on items such as milk and bread.
Retail Excellence Ireland's Jean McCabe says there's enough supplies to go around.
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