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Rain shadow protects Victoria while Vancouver Island faces 150 to 200 mm of rain
West and inland areas could get up to 200 mm of rain as Environment Canada and the provincial River Forecast Centre issue overlapping alerts.
On Tuesday, two back-to-back storm systems arrived on Vancouver Island, prompting Environment Canada to issue an orange rainfall warning and the provincial River Forecast Centre to initiate a flood watch for areas expecting up to 200 mm of precipitation.
Meteorologist Mike Gismondi explained the rain shadow—shielded by mountain ranges—protects Victoria and Nanaimo from the worst precipitation, while the west and inland regions face the brunt with 150 to 200 mm of rain expected.
North of Nanaimo, wind warnings remain in effect with gusts to 90 km/h expected. Near Haro Strait and the Southern Gulf Islands, gusts to 70 km/h are forecast, while afternoon showers reach up to 20 mm/h through Wednesday.
A temporary break is expected late Wednesday, Gismondi said, but relief will be short-lived as rain redevelops on Thursday and continues into Friday with another system pushing in.
Beyond Friday, the South Island remains wet, with Sunday likely being wetter. Gismondi noted forecasting challenges, saying, "As things get closer, we get a better sense of what" is going to happen.