WWCN11 CWVR 201157

YELLOW WARNING - RAINFALL

FOR COASTAL BRITISH COLUMBIA

UPDATED BY ENVIRONMENT CANADA

AT 4:57 A.M. PDT FRIDAY 20 MARCH 2026.

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YELLOW LEVEL WARNING - RAINFALL - FOR:

      WHISTLER.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



A LONG EPISODE OF RAIN, AT TIMES HEAVY, IS EXPECTED.



WHAT: 

STORM TOTAL OF 50 TO 75 MM OF RAIN. 



WHEN: 

TODAY. 



WHERE: 

WHISTLER, PEMBERTON, SEA-TO-SKY HIGHWAY 



IMPACTS: 

- PROLONGED HEAVY RAIN ON SNOW COMBINED WITH MOUNTAIN SNOW MELT 

COULD LEAD TO VERY ENHANCED RESPONSES IN RIVER SYSTEMS AND THE 

POTENTIAL FOR FLOODING. 

- EXTENSIVE WATER POOLING ON ROADS AND WASHOUTS POSSIBLE. 

- ENHANCED RISK OF LANDSLIDES DUE TO SATURATION OF THE GROUND. 



ADDITIONAL INFORMATION: 

AN ATMOSPHERIC RIVER WILL REMAIN OVER THE SOUTH COAST OF B.C. 

THROUGH LATE THIS AFTERNOON. WITH FREEZING LEVELS NEAR 1500 TO 2500 

METRES, SNOWMELT FROM HIGHER ELEVATIONS MAY INCREASE THE IMPACTS 

ASSOCIATED WITH THIS RAINFALL EVENT. 



HEAVY RAIN WILL BEGIN TO TAPER OFF THIS AFTERNOON AS A COLD FRONT 

SWEEPS ACROSS THE LOWER MAINLAND. FREEZING LEVELS WILL ALSO LOWER TO 

500 TO 1000 METRES BY SATURDAY.



WATER WILL LIKELY POOL ON ROADS AND IN LOW-LYING AREAS. SOME TRAVEL 

DELAYS ARE POSSIBLE. ALLOW EXTRA TIME FOR TRAVEL. WATCH FOR WASHOUTS 

NEAR RIVERS, CREEKS AND CULVERTS. 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