537
FPCN11 CWNT 181639
FORECASTS FOR THE GREAT SLAVE LAKE AND MACKENZIE RIVER AREAS OF THE
NORTHWEST TERRITORIES ISSUED BY ENVIRONMENT CANADA AT 11:00 A.M. MDT
MONDAY 18 MAY 2026 FOR TODAY AND TUESDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 4:00 P.M. MDT.
THEBACHA REGION INCLUDING FT. SMITH - SALT RIVER RESERVE.
TODAY..SUNNY. HIGH 15. UV INDEX 4 OR MODERATE.
TONIGHT..A FEW CLOUDS. LOW PLUS 5.
TUESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE AFTERNOON.
WIND BECOMING SOUTH 20 KM/H IN THE AFTERNOON. HIGH 20. UV INDEX 5 OR
MODERATE.
LUTSEL K'E REGION.
TODAY..SUNNY. WIND BECOMING SOUTH 20 KM/H THIS AFTERNOON. HIGH 11. UV
INDEX 4 OR MODERATE.
TONIGHT..A FEW CLOUDS. WIND BECOMING SOUTHEAST 20 KM/H NEAR MIDNIGHT.
LOW PLUS 4.
TUESDAY..A MIX OF SUN AND CLOUD. HIGH 16. UV INDEX 4 OR MODERATE.
FT. RESOLUTION REGION INCLUDING HWY. 6.
TODAY..MAINLY SUNNY. WIND SOUTHEAST 30 KM/H GUSTING TO 50. HIGH 16.
UV INDEX 4 OR MODERATE.
TONIGHT..PARTLY CLOUDY. WIND SOUTHEAST 30 KM/H GUSTING TO 50 BECOMING
LIGHT THIS EVENING. LOW 7.
TUESDAY..SUNNY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS LATE IN THE AFTERNOON. HIGH 18. UV
INDEX 5 OR MODERATE.
HAY RIVER REGION INCLUDING ENTERPRISE.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD THIS AFTERNOON. WIND
SOUTH 30 KM/H GUSTING TO 50. HIGH 19. UV INDEX 5 OR MODERATE.
TONIGHT..PARTLY CLOUDY. WIND SOUTH 30 KM/H GUSTING TO 50 BECOMING
LIGHT THIS EVENING. LOW 7.
TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE IN
THE AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 17. UV INDEX 5 OR
MODERATE.
FT. PROVIDENCE REGION INCLUDING KAKISA - CHAN LAKE.
TODAY..SUNNY EARLY THIS AFTERNOON THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. RISK OF A THUNDERSTORM
LATE THIS AFTERNOON. HIGH 20. UV INDEX 5 OR MODERATE.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. OTHERWISE CLEAR. RISK OF A THUNDERSTORM EARLY THIS EVENING.
LOW 6.
TUESDAY..INCREASING CLOUDINESS EARLY IN THE MORNING. 30 PERCENT
CHANCE OF SHOWERS LATE IN THE AFTERNOON WITH RISK OF A THUNDERSTORM.
HIGH 17. UV INDEX 3 OR MODERATE.
FT. SIMPSON REGION INCLUDING JEAN MARIE RIVER.
TODAY..A MIX OF SUN AND CLOUD. HIGH 24. UV INDEX 5 OR MODERATE.
TONIGHT..PARTLY CLOUDY. LOW 9.
TUESDAY..INCREASING CLOUDINESS EARLY IN THE MORNING. 30 PERCENT
CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 18. UV INDEX 3 OR MODERATE.
FT. LIARD REGION INCLUDING NAHANNI BUTTE - SAMBAA K'E.
TODAY..A MIX OF SUN AND CLOUD. WIND SOUTHWEST 20 KM/H GUSTING TO 40.
HIGH 22. UV INDEX 5 OR MODERATE.
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY NEAR MIDNIGHT. WIND SOUTHWEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 10.
TUESDAY..CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. HIGH 17. UV
INDEX 3 OR MODERATE.
YELLOWKNIFE REGION.
TODAY..MAINLY SUNNY. WIND SOUTHEAST 40 KM/H GUSTING TO 60. HIGH 13.
UV INDEX 4 OR MODERATE.
TONIGHT..INCREASING CLOUDINESS THEN 30 PERCENT CHANCE OF SHOWERS LATE
THIS EVENING. CLEARING BEFORE MORNING. WIND SOUTHEAST 40 KM/H
GUSTING TO 60 DIMINISHING TO 20 THIS EVENING. LOW 6.
TUESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE AFTERNOON.
WIND SOUTHEAST 20 KM/H. HIGH 16. UV INDEX 4 OR MODERATE.
NORTH SLAVE REGION INCLUDING WEKWEETI - WHATI - BEHCHOKO.
TODAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. RISK
OF A THUNDERSTORM LATE THIS AFTERNOON. WIND SOUTHEAST 20 KM/H
GUSTING TO 40 BECOMING LIGHT THIS AFTERNOON. HIGH 17. UV INDEX 4 OR
MODERATE.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING AND
AFTER MIDNIGHT. RISK OF A THUNDERSTORM EARLY THIS EVENING. LOW 6.
TUESDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS LATE IN THE
AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 13. UV INDEX 4 OR
MODERATE.
WRIGLEY REGION.
TODAY..A MIX OF SUN AND CLOUD. WIND SOUTHEAST 20 KM/H GUSTING TO 40
BECOMING LIGHT THIS AFTERNOON. HIGH 20. UV INDEX 4 OR MODERATE.
TONIGHT..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. CLEARING NEAR MIDNIGHT. LOW PLUS 5.
TUESDAY..MAINLY SUNNY. HIGH 18. UV INDEX 4 OR MODERATE.
NORMAN WELLS - TULITA REGION.
TODAY..A MIX OF SUN AND CLOUD. HIGH 20. UV INDEX 4 OR MODERATE.
TONIGHT..PARTLY CLOUDY. LOW 6.
TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE
MORNING. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 13. UV INDEX 4
OR MODERATE.
FORT GOOD HOPE REGION.
TODAY..A MIX OF SUN AND CLOUD. WIND WEST 20 KM/H GUSTING TO 40.
HIGH 21. UV INDEX 4 OR MODERATE.
TONIGHT..MAINLY CLOUDY. WIND WEST 20 KM/H GUSTING TO 40 BECOMING
LIGHT THIS EVENING. LOW 6.
TUESDAY..MAINLY CLOUDY. HIGH 13. UV INDEX 4 OR MODERATE.
DELINE.
TODAY..MAINLY SUNNY. HIGH 17. UV INDEX 4 OR MODERATE.
TONIGHT..PARTLY CLOUDY. LOW PLUS 4.
TUESDAY..MAINLY CLOUDY. CLEARING IN THE AFTERNOON. WIND BECOMING
NORTHWEST 20 KM/H IN THE AFTERNOON. HIGH 10. UV INDEX 4 OR MODERATE.
COLVILLE LAKE.
TODAY..A MIX OF SUN AND CLOUD. HIGH 11. UV INDEX 4 OR MODERATE.
TONIGHT..PARTLY CLOUDY. LOW PLUS 2.
TUESDAY..MAINLY CLOUDY. HIGH 7. UV INDEX 4 OR MODERATE.
END
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