FPCN11 CWUL 181929 FORECASTS FOR WESTERN QUEBEC ISSUED BY ENVIRONMENT CANADA AT 3:45 P.M. EDT MONDAY 18 MAY 2026 FOR TONIGHT TUESDAY AND TUESDAY NIGHT. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT TUESDAY. METRO MONTREAL - LAVAL. TONIGHT..CLEAR THIS EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. TEMPERATURE STEADY NEAR 20. TUESDAY..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS IN THE MORNING. WIND BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 IN THE MORNING THEN INCREASING TO 40 GUSTING TO 60 NEAR NOON. HIGH 30. HUMIDEX 35. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 40 KM/H GUSTING TO 60 DIMINISHING TO 20 GUSTING TO 40 NEAR MIDNIGHT. LOW 18. VAUDREUIL - SOULANGES - HUNTINGDON. TONIGHT..CLEAR THIS EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. LOW 21. TUESDAY..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS IN THE MORNING. WIND BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 IN THE MORNING THEN INCREASING TO 40 GUSTING TO 60 NEAR NOON. HIGH 30. HUMIDEX 35. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 40 KM/H GUSTING TO 60 DIMINISHING TO 20 GUSTING TO 40 NEAR MIDNIGHT. LOW 20. RICHELIEU VALLEY - SAINT-HYACINTHE. TONIGHT..CLEAR THIS EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. TEMPERATURE STEADY NEAR 20. TUESDAY..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS IN THE MORNING. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 60 IN THE MORNING. HIGH 30. HUMIDEX 35. UV INDEX 9 OR VERY HIGH. TUESDAY NIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 60. LOW 20. LANAUDIERE. TONIGHT..PARTLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS OVERNIGHT. FOG PATCHES DEVELOPING OVERNIGHT. LOW 15. TUESDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS IN THE MORNING THEN A MIX OF SUN AND CLOUD. FOG PATCHES DISSIPATING EARLY IN THE MORNING. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE MORNING. HIGH 27. HUMIDEX 33. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..A FEW SHOWERS ENDING IN THE EVENING THEN MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50. LOW 18. LACHUTE - SAINT-JEROME. TONIGHT..CLEAR THIS EVENING AND AFTER MIDNIGHT THEN PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS OVERNIGHT. TEMPERATURE STEADY NEAR 18. TUESDAY..A FEW SHOWERS ENDING NEAR NOON THEN A MIX OF SUN AND CLOUD. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE MORNING. HIGH 26. HUMIDEX 32. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50. LOW 17. LAURENTIANS. TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. LOW 17. TUESDAY..A FEW SHOWERS ENDING IN THE MORNING THEN A MIX OF SUN AND CLOUD. A FEW SHOWERS BEGINNING IN THE AFTERNOON. RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE AFTERNOON. HIGH 24. HUMIDEX 31. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..A FEW SHOWERS ENDING IN THE EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM EARLY IN THE EVENING. WIND SOUTHWEST 30 KM/H GUSTING TO 50. LOW 17. MONT-TREMBLANT PARK - SAINT-MICHEL-DES-SAINTS. TONIGHT..PARTLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. RISK OF THUNDERSTORMS LATE THIS EVENING AND AFTER MIDNIGHT. TEMPERATURE STEADY NEAR 17. TUESDAY..A FEW SHOWERS ENDING IN THE MORNING THEN MAINLY CLOUDY. A FEW SHOWERS BEGINNING IN THE AFTERNOON. RISK OF THUNDERSTORMS LATE IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE AFTERNOON. HIGH 22. HUMIDEX 27. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..A FEW SHOWERS ENDING IN THE EVENING THEN MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT NEAR MIDNIGHT. LOW 16. MONT-LAURIER. TONIGHT..BECOMING CLOUDY THIS EVENING WITH A FEW SHOWERS. RISK OF THUNDERSTORMS THIS EVENING. AMOUNT 10 TO 15 MM. TEMPERATURE STEADY NEAR 16. TUESDAY..A FEW SHOWERS ENDING IN THE MORNING THEN MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS IN THE MORNING AND EARLY IN THE AFTERNOON. SHOWERS BEGINNING IN THE AFTERNOON. RISK OF THUNDERSTORMS LATE IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE AFTERNOON. HIGH 23. HUMIDEX 30. UV INDEX 8 OR VERY HIGH. TUESDAY NIGHT..SHOWERS ENDING IN THE EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT NEAR MIDNIGHT. LOW 12. LA VERENDRYE WILDLIFE RESERVE. TONIGHT..MAINLY CLOUDY. SHOWERS BEGINNING EARLY THIS EVENING AND ENDING OVERNIGHT THEN 40 PERCENT CHANCE OF SHOWERS. RISK OF A SEVERE THUNDERSTORM THIS EVENING. AMOUNT 10 TO 20 MM. TEMPERATURE STEADY NEAR 16. TUESDAY..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE MORNING. SHOWERS BEGINNING NEAR NOON. RISK OF A THUNDERSTORM IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE AFTERNOON. HIGH 19. UV INDEX 7 OR HIGH. TUESDAY NIGHT..SHOWERS ENDING IN THE EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT LATE IN THE EVENING. LOW PLUS 4. UPPER GATINEAU - LIEVRE - PAPINEAU. TONIGHT..INCREASING CLOUDINESS. A FEW SHOWERS BEGINNING LATE THIS EVENING. RISK OF A THUNDERSTORM LATE THIS EVENING. LOW 16. TUESDAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE MORNING AND EARLY IN THE AFTERNOON. A FEW SHOWERS BEGINNING IN THE AFTERNOON. RISK OF THUNDERSTORMS LATE IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 NEAR NOON. HIGH 23. HUMIDEX 31. UV INDEX 6 OR HIGH. TUESDAY NIGHT..A FEW SHOWERS ENDING IN THE EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT LATE IN THE EVENING. LOW 13. PONTIAC. TONIGHT..INCREASING CLOUDINESS. A FEW SHOWERS BEGINNING THIS EVENING. RISK OF A SEVERE THUNDERSTORM LATE THIS EVENING. AMOUNT 10 TO 20 MM. LOW 16. TUESDAY..CLOUDY. A FEW SHOWERS BEGINNING NEAR NOON. RISK OF A THUNDERSTORM IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 NEAR NOON. HIGH 22. HUMIDEX 30. UV INDEX 6 OR HIGH. TUESDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT LATE IN THE EVENING. LOW 11. TEMISCAMINGUE. TONIGHT..BECOMING CLOUDY THIS EVENING WITH SHOWERS CHANGING TO 40 PERCENT CHANCE OF SHOWERS NEAR MIDNIGHT. RISK OF A SEVERE THUNDERSTORM THIS EVENING. AMOUNT 10 TO 20 MM. WIND SOUTHWEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 11. TUESDAY..CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE MORNING. SHOWERS BEGINNING LATE IN THE MORNING. RISK OF A THUNDERSTORM IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE AFTERNOON. HIGH 18. UV INDEX 4 OR MODERATE. TUESDAY NIGHT..SHOWERS ENDING IN THE EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT IN THE EVENING. LOW PLUS 3. ABITIBI. TONIGHT..A FEW SHOWERS ENDING EARLY THIS EVENING THEN CLOUDY WITH 60 PERCENT CHANCE OF DRIZZLE. RISK OF A THUNDERSTORM EARLY THIS EVENING. WIND SOUTHEAST 20 KM/H GUSTING TO 40 BECOMING LIGHT EARLY THIS EVENING. LOW 10. TUESDAY..CLOUDY. SHOWERS BEGINNING IN THE MORNING. RISK OF A THUNDERSTORM IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 NEAR NOON. HIGH 17. UV INDEX 3 OR MODERATE. TUESDAY NIGHT..SHOWERS CHANGING TO PERIODS OF DRIZZLE IN THE EVENING AND ENDING OVERNIGHT THEN CLOUDY. LOW PLUS 2. PARENT - GOUIN RESERVOIR. TONIGHT..MAINLY CLOUDY. SHOWERS BEGINNING THIS EVENING. RISK OF THUNDERSTORMS THIS EVENING AND AFTER MIDNIGHT. AMOUNT 10 TO 20 MM. TEMPERATURE STEADY NEAR 13. TUESDAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE MORNING AND EARLY IN THE AFTERNOON. A FEW SHOWERS BEGINNING IN THE AFTERNOON. RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO 50 IN THE AFTERNOON. HIGH 20. UV INDEX 5 OR MODERATE. TUESDAY NIGHT..A FEW SHOWERS ENDING IN THE EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT NEAR MIDNIGHT. LOW 9. MATAGAMI. TONIGHT..SHOWERS WITH A FEW THUNDERSTORMS ENDING THIS EVENING THEN CLOUDY WITH 40 PERCENT CHANCE OF DRIZZLE. WIND NORTHEAST 20 KM/H BECOMING LIGHT NEAR MIDNIGHT. LOW PLUS 5. TUESDAY..CLOUDY. 40 PERCENT CHANCE OF DRIZZLE IN THE MORNING. PERIODS OF RAIN BEGINNING NEAR NOON. WIND EAST 20 KM/H BECOMING NORTHWEST 20 LATE IN THE AFTERNOON. HIGH 13. UV INDEX 5 OR MODERATE. TUESDAY NIGHT..CLOUDY. 40 PERCENT CHANCE OF RAIN SHOWERS CHANGING TO 40 PERCENT CHANCE OF FLURRIES OVERNIGHT. WIND NORTHWEST 20 KM/H GUSTING TO 40. LOW PLUS 2. WASKAGANISH. TONIGHT..RAIN SHOWERS OR FLURRIES ENDING EARLY THIS EVENING THEN MAINLY CLOUDY. WIND NORTHEAST 20 KM/H. LOW PLUS 1. TUESDAY..MAINLY CLOUDY. RAIN BEGINNING NEAR NOON. AMOUNT 15 MM. WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 7. UV INDEX 6 OR HIGH. TUESDAY NIGHT..PERIODS OF RAIN CHANGING TO LIGHT SNOW OVERNIGHT. WIND NORTHEAST 20 KM/H GUSTING TO 40 BECOMING NORTHWEST 20 GUSTING TO 40 NEAR MIDNIGHT. LOW PLUS 1. END