The M48 Severn Bridge has been shut due to strong winds and an overturned lorry near junction 2 on the A466 (Chepstow), affecting nearby M4 traffic.
Arriva Trains Wales reported speed restrictions on some services in north Wales due to the adverse weather.
BBC Wales forecaster Sue Charles said 20-40mm of rain was likely with gusts of 80mph possible along exposed coasts due to Storm Gertrude.
The Met Office yellow "be aware" warning for strong wind covers north and mid Wales until 18:00 GMT with heavy rain forecast across Wales.
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There are weather warnings for winds of up to 80mph and heavy rain on Friday.