WWCN11 CWVR 200720 ORANGE WARNING - RAINFALL FOR COASTAL BRITISH COLUMBIA UPDATED BY ENVIRONMENT CANADA AT 12:20 A.M. PDT FRIDAY 20 MARCH 2026. --------------------------------------------------------------------- ORANGE LEVEL WARNING - RAINFALL - FOR: METRO VANCOUVER - NORTHEAST INCLUDING COQUITLAM AND MAPLE RIDGE. --------------------------------------------------------------------- IMPACT LEVEL: HIGH FORECAST CONFIDENCE: HIGH ==DISCUSSION== RAIN, AT TIMES HEAVY, CONTINUES. PROLONGED ATMOSPHERIC RIVER EVENT WHAT: 80 TO 130 MM OF RAIN BY LATE THIS AFTERNOON. WHERE: - METRO VANCOUVER - NORTHEAST INCLUDING COQUITLAM AND MAPLE RIDGE WHEN: - PERIODS OF HEAVY RAIN CONTINUES TODAY IMPACTS: -PROLONGED HEAVY RAIN ON SNOW COMBINED WITH MOUNTAIN SNOW MELT COULD LEAD TO VERY ENHANCED RESPONSES IN RIVER SYSTEMS AND POTENTIAL FOR FLOODING. -EXTENSIVE WATER POOLING ON ROADS AND WASHOUTS MAY OCCUR. -ENHANCED RISK OF LANDSLIDES DUE TO SATURATION OF LANDSCAPES. REMARKS: AN ATMOSPHERIC RIVER WILL REMAIN OVER THE SOUTH COAST OF B.C. THROUGH THIS AFTERNOON. WITH FREEZING LEVELS NEAR 2000 TO 2500 METRES, SNOWMELT FROM HIGHER ELEVATIONS MAY INCREASE THE IMPACTS ASSOCIATED WITH THIS RAINFALL EVENT. THE HEAVIEST RAINFALL IS EXPECTED TONIGHT INTO THIS MORNING. HEAVY RAIN WILL BEGIN TO TAPER OFF AFTER NOON TODAY AS A COLD FRONT SWEEPS ACROSS THE LOWER MAINLAND. FREEZING LEVELS WILL ALSO LOWER TO 500 TO 1000 METRES BY SATURDAY. LOCALIZED FLOODING IS LIKELY. SOME ROADS MAY BECOME IMPASSABLE. TRAVEL DELAYS AND/OR CANCELLATIONS ARE LIKELY. LANDSLIDES MAY OCCUR IN VULNERABLE AREAS SUCH AS STEEP SLOPES, DEFORESTED AREAS OR RECENT BURN SCARS. DON'T DRIVE THROUGH FLOODED ROADWAYS. RAINFALL WARNINGS ARE ISSUED WHEN SIGNIFICANT IMPACTS ARE EXPECTED DUE TO RAINFALL AMOUNTS. PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY ENVIRONMENT CANADA. TO REPORT SEVERE WEATHER, SEND AN EMAIL TO BCSTORM(AT)EC.GC.CA OR POST REPORTS ON X USING (HASH)BCSTORM. HTTP://WEATHER.GC.CA END/PSPC