Rain will fall over Metro Vancouver and the Fraser Valley, especially near the mountains
Following the news of “another parade of storms” hitting the province this week, a rain warning has been issued for large parts of Metro Vancouver and the Fraser Valley.
Environment Canada issued the special weather declaration Tuesday morning (November 23) and warned residents that another round of heavy rain is on its way. The affected areas include the City of Vancouver, Burnaby, New Westminster, North Shore including West Vancouver and North Vancouver, Coquitlam, Maple Ridge, Surrey, Langley, Richmond and Delta.
While there is still some uncertainty about the total expected rainfall, between 40 and 80 mm of rain is expected, especially near the mountains, the Sea to Sky Corridor and the Sunshine Coast from Gibsons to Earls Cove.
“The next storm system is set to arrive on the BC South Coast overnight on Wednesday,” Environment Canada explains. “This storm will be shorter and less intense than the event of November 13-15, 2021.”
“However, it will still bring moderate to heavy rain and strong winds. In addition, frost levels will rise over mountain peaks on Thursday. This could exacerbate recent floods and affect vulnerable landscapes and infrastructure. “
The storm’s timeline spans overnight on November 24 to the morning of November 26 with strong southeasterly winds expected near the water on November 25.
A recent report from AccuWeather notes that this second storm “will be the one to really take care of” as it is expected to bring heavy rain that could produce flooding and increase the risk of mudslides.
“More waves of moisture will lead to excessive rainfall in the northwest Pacific later this week,” said AccuWeather Storm Warning Meteorologist Dana Carron.
The storms will have a greater impact on sites that have already experienced extensive flooding.
Another element that AccuWeather forecasts say could have potentially dangerous consequences: heat.
“Higher temperatures accompanying these systems will lead to melting snow in the Washington Cascades and the Canadian Rockies, which will further intensify the potential for floods,” Carron said.
As snowmelt increases, so does the flooding of rivers and streams. If rivers or streams swell high enough, they can wash out roads or even bridges, as was the case last week.