As we near the end of September, it's going to be quite wet and cool for B.C. leading into the final days of the month. The pattern will become quite unsettled from atmospheric rivers of moisture setting sights on the coastal regions. While the North Coast will see the initial round of rain Saturday, the first shot hits the Lower Mainland Sunday, picking up in intensity in the afternoon hours. 100+ mm is forecast for coastal Vancouver Island with the first round of precipitation. The wet weather will continue into next week, with another wave expected mid- and late-week. It may also bring intense wind gusts. A closer look, below.
THROUGH EARLY NEXT WEEK: FIRST PUSH OF SOGGY WEATHER
With an incoming surge of Pacific moisture headed for the B.C. coasts, the first area to be impacted by the rain will be the North Coast -- seeing the precipitation filter in late Saturday morning.
As a low-pressure system moves further ashore, rainfall rates are expected to intensify Sunday afternoon into the evening hours across the Lower Mainland, as the jet stream dips down to reach the South Coast, holding steady into early Tuesday, perhaps.
Locally, 50-75+ mm of rainfall is anticipated with the first round -- Sunday to Tuesday -- for the Metro Vancouver area, 100+ mm for coastal Vancouver Island.
Freezing levels will remain quite high with this system, therefore high-elevation snow is not a concern.
NEXT WEEK: COOL, UNSETTLED, BLUSTERY, WITH MORE RAIN
Next week also looks quite soggy, with an active and wet pattern settling in. Eyes look ahead to mid- to late-week with a secondary trough moving onshore.
This will not only bring another round of rain, it has the potential to deliver widespread strong winds. They are likely to reach urban areas across the South Coast and for much of Vancouver Island. While it's tricky to say whether or not the intense winds will impact Metro Vancouver, but some models are hinting at 60-70+ km/h, even 80+ km/h for areas inland.
It's certainly been a wet start to the fall season, coming on the last days of the summer having already been fall-like in terms of stormy weather for the coasts.
"Vancouver has already seen close to double its average rainfall for the month of September and the final week of the month will bring close to their average rainfall for the entire month of September once again," Weather Network meteorologist Dr. Doug Gillham says.
As well, near or below seasonal temperatures are expected through the end of next week and into the first few days of October.
Check back for updates as the situation evolves.