Environment Canada meteorologist Ross Macdonald said travellers should be prepared if winds of up to 60 kilometres an hour halt ferry traffic.
A storm making its way through the West Coast dumped about 60 millimetres of rain overnight in Vancouver and about 10 centimetres of snow on Interior highways such as the Kootenay Pass.
Macdonald said such weather systems are not uncommon for this time of year.
Except for some road flooding, no damage has been reported so far.
On Saturday afternoon, two lanes were closed on Highway 99 south of Vancouver at Highway 91 because of pooling water.
The Transportation Ministry was urging motorists to drive with caution and to check the drivebc.com website for current information on provincial highways.
The B.C. government also issued a travel advisory for Highway 5 due to heavy snowfall and rain, and Highway 3 will be closed five kilometres west of Kootenay Pass Summit to five kilometres east of the region for snow removal.