The rain comes just a day after the region received 20 mm of precipitation overnight Tuesday, the most significant rainfall since June.
A special weather statement for the South Coast issued by Environment Canada warns the region could get 15 to 40 mm of rain, with up 50 mm falling on the west side of some mountains. Thunderstorms, and gusty winds are expected to hit some areas as well on Wednesday night.
The storm passes through by Thursday night, but the showers will linger on Friday. Then conditions are forecast to improve just in time for the Labour Day long weekend.
Catch Johanna's full forecast on CBC News Vancouver at 5 and 6.
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