427
FPCN11 CWNT 172130
FORECASTS FOR THE GREAT SLAVE LAKE AND MACKENZIE RIVER AREAS OF THE
NORTHWEST TERRITORIES ISSUED BY ENVIRONMENT CANADA AT 4:00 P.M. MDT
MONDAY 17 AUGUST 2026 FOR TONIGHT TUESDAY AND TUESDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. MDT TUESDAY.
THEBACHA REGION INCLUDING FT. SMITH - SALT RIVER RESERVE.
TONIGHT..A FEW CLOUDS. LOW 12.
TUESDAY..INCREASING CLOUDINESS IN THE MORNING. HIGH 23. HUMIDEX 26.
UV INDEX 5 OR MODERATE.
TUESDAY NIGHT..MAINLY CLOUDY. LOW 14.
LUTSEL K'E REGION.
TONIGHT..A FEW CLOUDS. LOW 11.
TUESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. HIGH 23.
HUMIDEX 26. UV INDEX 4 OR MODERATE.
TUESDAY NIGHT..PARTLY CLOUDY. LOW 15.
FT. RESOLUTION REGION INCLUDING HWY. 6.
TONIGHT..CLEAR. LOW 13.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H IN THE
AFTERNOON. HIGH 23. HUMIDEX 26. UV INDEX 5 OR MODERATE.
TUESDAY NIGHT..PARTLY CLOUDY. LOW 15.
HAY RIVER REGION INCLUDING ENTERPRISE.
TONIGHT..CLEAR. INCREASING CLOUDINESS OVERNIGHT. WIND BECOMING
SOUTHEAST 20 KM/H THIS EVENING. LOW 14.
TUESDAY..CLEARING NEAR NOON. WIND BECOMING SOUTHWEST 20 KM/H IN THE
MORNING. HIGH 26. HUMIDEX 29. UV INDEX 4 OR MODERATE.
TUESDAY NIGHT..MAINLY CLOUDY. WIND WEST 20 KM/H. LOW 14.
FT. PROVIDENCE REGION INCLUDING KAKISA - CHAN LAKE.
TONIGHT..CLEAR. INCREASING CLOUDINESS NEAR MIDNIGHT. LOW 14.
TUESDAY..CLEARING IN THE MORNING. HIGH 27. HUMIDEX 30. UV INDEX 5 OR
MODERATE.
TUESDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS LATE IN
THE EVENING AND OVERNIGHT. LOW 14.
FT. SIMPSON REGION INCLUDING JEAN MARIE RIVER.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY THIS EVENING. LOCAL SMOKE.
LOW 15.
TUESDAY..MAINLY SUNNY. LOCAL SMOKE. HIGH 28. HUMIDEX 30. UV INDEX 5
OR MODERATE.
TUESDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS LATE IN
THE EVENING AND OVERNIGHT WITH RISK OF A THUNDERSTORM. LOCAL SMOKE.
LOW 13.
FT. LIARD REGION INCLUDING NAHANNI BUTTE - SAMBAA K'E.
TONIGHT..MAINLY CLOUDY. CLEARING BEFORE MORNING. WIND SOUTHWEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 15.
TUESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 24.
HUMIDEX 26. UV INDEX 5 OR MODERATE.
TUESDAY NIGHT..CLEAR. WIND SOUTHWEST 20 KM/H GUSTING TO 40 BECOMING
LIGHT IN THE EVENING. LOW 13.
YELLOWKNIFE REGION.
TONIGHT..A FEW CLOUDS. WIND SOUTHEAST 20 KM/H GUSTING TO 40. LOW 13.
TUESDAY..MAINLY SUNNY. WIND SOUTHEAST 30 KM/H. HIGH 22. HUMIDEX 25.
UV INDEX 5 OR MODERATE.
TUESDAY NIGHT..CLEAR IN THE EVENING THEN PARTLY CLOUDY WITH
30 PERCENT CHANCE OF SHOWERS OVERNIGHT. WIND SOUTH 30 KM/H BECOMING
NORTHWEST 30 OVERNIGHT. LOW 13.
NORTH SLAVE REGION INCLUDING WEKWEETI - WHATI - BEHCHOKO.
TONIGHT..CLEAR. INCREASING CLOUDINESS AFTER MIDNIGHT. WIND SOUTHEAST
20 KM/H BECOMING LIGHT THIS EVENING. LOW 12.
TUESDAY..CLEARING IN THE MORNING. LOCAL SMOKE LATE IN THE AFTERNOON.
HIGH 24. HUMIDEX 26. UV INDEX 4 OR MODERATE.
TUESDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT WITH RISK OF A THUNDERSTORM. LOCAL SMOKE.
WIND BECOMING NORTHWEST 30 KM/H IN THE EVENING THEN LIGHT OVERNIGHT.
LOW 11.
WRIGLEY REGION.
TONIGHT..INCREASING CLOUDINESS THEN 30 PERCENT CHANCE OF SHOWERS
EARLY THIS EVENING. BECOMING A FEW CLOUDS NEAR MIDNIGHT. LOCAL
SMOKE. WIND SOUTHEAST 20 KM/H GUSTING TO 40 BECOMING LIGHT NEAR
MIDNIGHT. LOW 13.
TUESDAY..SUNNY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS LATE IN THE AFTERNOON. RISK OF A
THUNDERSTORM LATE IN THE AFTERNOON. HIGH 24. HUMIDEX 26. UV INDEX 4
OR MODERATE.
TUESDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING WITH RISK OF A THUNDERSTORM. WIND NORTHWEST 20 KM/H BECOMING
LIGHT NEAR MIDNIGHT. LOW 13.
NORMAN WELLS - TULITA REGION.
TONIGHT..INCREASING CLOUDINESS THEN 30 PERCENT CHANCE OF SHOWERS
EARLY THIS EVENING. CLEARING AFTER MIDNIGHT. WIND SOUTHEAST 20 KM/H
BECOMING NORTHWEST 30 THIS EVENING THEN LIGHT OVERNIGHT. LOW 12.
TUESDAY..INCREASING CLOUDINESS EARLY IN THE MORNING. 60 PERCENT
CHANCE OF SHOWERS LATE IN THE MORNING AND IN THE AFTERNOON. RISK OF
A THUNDERSTORM IN THE AFTERNOON. WIND WEST 30 KM/H GUSTING TO 50.
HIGH 19. UV INDEX 1 OR LOW.
TUESDAY NIGHT..A FEW SHOWERS ENDING NEAR MIDNIGHT THEN PARTLY CLOUDY.
RISK OF A THUNDERSTORM IN THE EVENING. WIND WEST 30 KM/H GUSTING TO
50 BECOMING LIGHT OVERNIGHT. LOW 10.
FORT GOOD HOPE REGION.
TONIGHT..INCREASING CLOUDINESS THEN 30 PERCENT CHANCE OF SHOWERS
EARLY THIS EVENING. BECOMING PARTLY CLOUDY THIS EVENING. LOW 15.
TUESDAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS.
RISK OF A THUNDERSTORM IN THE AFTERNOON. WIND WEST 20 KM/H. HIGH 21.
UV INDEX 3 OR MODERATE.
TUESDAY NIGHT..MAINLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. WIND
WEST 30 KM/H GUSTING TO 50. LOW 10.
DELINE.
TONIGHT..INCREASING CLOUDINESS THEN 30 PERCENT CHANCE OF SHOWERS
EARLY THIS EVENING. CLEARING BEFORE MORNING. WIND SOUTHEAST 20 KM/H
GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 11.
TUESDAY..INCREASING CLOUDINESS. 60 PERCENT CHANCE OF SHOWERS IN THE
AFTERNOON WITH RISK OF A THUNDERSTORM. WIND BECOMING NORTHWEST
30 KM/H GUSTING TO 50 NEAR NOON. HIGH 16. UV INDEX 3 OR MODERATE.
TUESDAY NIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM IN THE EVENING. WIND NORTHWEST 30 KM/H GUSTING TO 50
BECOMING LIGHT IN THE EVENING. LOW 9.
COLVILLE LAKE.
TONIGHT..INCREASING CLOUDINESS THEN 30 PERCENT CHANCE OF SHOWERS LATE
THIS EVENING. CLEARING OVERNIGHT. WIND SOUTH 20 KM/H BECOMING LIGHT
THIS EVENING. LOW 15.
TUESDAY..INCREASING CLOUDINESS EARLY IN THE MORNING. 30 PERCENT
CHANCE OF SHOWERS LATE IN THE MORNING AND EARLY AFTERNOON. RISK OF A
THUNDERSTORM EARLY IN THE AFTERNOON. WIND BECOMING WEST 20 KM/H NEAR
NOON. HIGH 20. UV INDEX 3 OR MODERATE.
TUESDAY NIGHT..INCREASING CLOUDINESS. 60 PERCENT CHANCE OF SHOWERS
OVERNIGHT. WIND WEST 20 KM/H. LOW 8.
END
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