FPCN11 CWTO 181316 AAB UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA AT 9:15 A.M. EDT SATURDAY 18 JULY 2026 FOR TODAY AND SUNDAY. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.M. EDT. MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY. TODAY..A FEW SHOWERS BECOMING MIXED WITH THUNDERSTORMS EARLY THIS AFTERNOON AND ENDING LATE THIS AFTERNOON THEN CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM LATE THIS MORNING. LOCAL AMOUNT 10 TO 20 MM. LOCAL SMOKE THIS MORNING. LOCAL SMOKE LATE THIS AFTERNOON. WIND SOUTHWEST 20 KM/H GUSTING TO 40 BECOMING NORTHWEST 30 GUSTING TO 50 NEAR NOON. HIGH 24. HUMIDEX 32. UV INDEX 3 OR MODERATE. TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOCAL SMOKE. WIND NORTHWEST 30 KM/H GUSTING TO 50. LOW 14. SUNDAY..CLEARING IN THE MORNING. LOCAL SMOKE IN THE MORNING. WIND NORTH 20 KM/H BECOMING LIGHT IN THE AFTERNOON. HIGH 22. UV INDEX 8 OR VERY HIGH. REMAINDER UNCHANGED. END