Rainfall Warning Issued for Fraser Valley as Atmospheric River Brings Heavy Precipitation

Alert Details

Environment Canada has issued a yellow rainfall warning for the Fraser Valley. This alert is part of a prolonged atmospheric river event currently impacting the South Coast of British Columbia. The warning indicates that significant impacts are expected due to the volume of rainfall.

Affected Areas

The warning is in effect for the Fraser Valley, specifically including the western region and the city of Abbotsford.

What You Should Do

Residents are advised to exercise caution as water is likely to pool on roads and in low-lying areas, which may lead to travel delays. Environment Canada recommends that residents continue to monitor local alerts and forecasts. Severe weather can be reported via email to BCstorm@ec.gc.ca or on X using the hashtag #BCStorm.

Expected Conditions

Total rainfall amounts are expected to reach between 100 and 120 mm by Friday, with higher totals possible near mountain ranges. A combination of heavy rain and snowmelt from higher elevations—where freezing levels are currently between 2000 and 2500 metres—may lead to enhanced river responses and potential flooding. Additional hazards include an enhanced risk of landslides due to saturated landscapes, as well as extensive water pooling or washouts on roadways.

Timeline

The atmospheric river will remain over the region through Friday. A second heavy rain event is expected from Thursday night into Friday morning. Conditions are forecast to begin tapering off midday Friday as a cold front moves across the Lower Mainland. Following the front, strong southwesterly winds will develop Friday afternoon, and freezing levels are projected to drop significantly to 500 to 1000 metres by Saturday.