FPCN11 CWNT 220639 AAC UPDATED FORECASTS FOR THE GREAT SLAVE LAKE AND MACKENZIE RIVER AREAS OF THE NORTHWEST TERRITORIES ISSUED BY ENVIRONMENT CANADA AT 12:38 A.M. MDT SATURDAY 22 AUGUST 2026 FOR TONIGHT SATURDAY AND SATURDAY NIGHT. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. MDT. LUTSEL K'E REGION. TONIGHT..SHOWERS. RISK OF A THUNDERSTORM AFTER MIDNIGHT. LOW 14. SATURDAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY IN THE MORNING. CLEARING IN THE MORNING. HIGH 21. HUMIDEX 25. UV INDEX 4 OR MODERATE. SATURDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY IN THE EVENING. LOW 17. YELLOWKNIFE REGION. TONIGHT..SHOWERS ENDING OVERNIGHT THEN PARTLY CLOUDY. RISK OF A THUNDERSTORM AFTER MIDNIGHT. WIND SOUTHEAST 20 KM/H. LOW 13. SATURDAY..A MIX OF SUN AND CLOUD. WIND SOUTHEAST 20 KM/H. HIGH 23. HUMIDEX 26. UV INDEX 4 OR MODERATE. SATURDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS OVERNIGHT WITH RISK OF A THUNDERSTORM. WIND SOUTHEAST 30 KM/H. LOW 15. REMAINDER UNCHANGED. END