WWCN11 CWVR 192048

ORANGE WARNING - RAINFALL

FOR COASTAL BRITISH COLUMBIA

UPDATED BY ENVIRONMENT CANADA

AT 1:48 P.M. PDT THURSDAY 19 MARCH 2026.

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ORANGE LEVEL WARNING - RAINFALL - FOR:

      FRASER VALLEY.



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IMPACT LEVEL: HIGH

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



A LONG EPISODE OF RAIN, AT TIMES HEAVY, CONTINUES.



PROLONGED ATMOSPHERIC RIVER EVENT 



WHERE: FRASER VALLEY 



WHAT AND WHEN: 

- TOTAL RAINFALL AMOUNTS FROM NOW TO FRIDAY: 100 TO 120 MM WITH 

HIGHER AMOUNTS POSSIBLE NEAR THE MOUNTAINS 

- ANOTHER HEAVY RAIN EVENT EXPECTED TONIGHT TO FRIDAY 



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 FRIDAY BRINGING PERIODS OF HEAVY RAIN ACROSS THE FRASER 

VALLEY. WITH FREEZING LEVELS NEAR 2000 TO 2500 METRES, SNOWMELT FROM 

HIGHER ELEVATIONS MAY INCREASE THE IMPACTS ASSOCIATED WITH THIS 

RAINFALL EVENT. 



PERIODS OF HEAVY RAIN WILL BEGIN TO TAPER OFF MIDDAY FRIDAY AS A 

COLD FRONT SWEEPS ACROSS THE LOWER MAINLAND. STRONG SOUTHWESTERLY 

WINDS WILL DEVELOP IN THE WAKE OF THE FRONT FRIDAY AFTERNOON. 

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. DAMAGE TO SOME 

CRITICAL INFRASTRUCTURE IS POSSIBLE. LANDSLIDES MAY OCCUR IN 

VULNERABLE AREAS SUCH AS STEEP SLOPES, DEFORESTED AREAS OR RECENT 

BURN SCARS. DON'T DRIVE THROUGH FLOODED ROADWAYS. AVOID LOW-LYING 

AREAS. 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