300
WWCN11 CWNT 271034
YELLOW WARNING - RAINFALL
FOR THE GREAT SLAVE AND UPPER MACKENZIE AREAS
ISSUED BY ENVIRONMENT CANADA
AT 4:34 A.M. MDT THURSDAY 27 AUGUST 2026.
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YELLOW LEVEL WARNING - RAINFALL - FOR:
=NEW= FT. PROVIDENCE REGION INCLUDING KAKISA - CHAN LAKE
=NEW= FT. SIMPSON REGION INCLUDING JEAN MARIE RIVER
=NEW= FT. LIARD REGION INCLUDING NAHANNI BUTTE - SAMBAA K'E.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
HEAVY RAIN IS EXPECTED.
SHOWERS WILL BEGIN THURSDAY AFTERNOON BRINGING 40-60 MM OF RAIN BY
SATURDAY MORNING.
THE SHOWERS WILL BE BANDED AND CONVECTIVE CAUSING THE RAINFALL
AMOUNTS TO BE HIGHLY VARIABLE. LOCAL AREAS MAY SEE RAINFALL AMOUNTS
AS HIGH AS 80 MM.
THE FORT LIARD REGION WILL SEE THE RAIN TAPER OFF FRIDAY AFTERNOON,
WHILE FORT SIMPSON AND FORT PROVIDENCE WILL HAVE RAIN UNTIL SATURDAY
MORNING.
SOME TRAVEL DELAYS ARE POSSIBLE. VISIBILITY WILL LIKELY BE SUDDENLY
REDUCED AT TIMES.
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
NTSTORM(AT)EC.GC.CA, CALL 1-800-239-0484 OR POST REPORTS ON SOCIAL
MEDIA USING (HASH)NTSTORM.
HTTP://WEATHER.GC.CA
END/PASPC
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