FPCN11 CWTO 151255 AAC UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA AT 8:54 A.M. EDT WEDNESDAY 15 APRIL 2026 FOR TODAY AND THURSDAY. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.M. EDT. HALTON HILLS - MILTON. TODAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING. FOG PATCHES DISSIPATING NEAR NOON. HIGH 21. HUMIDEX 27. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 13. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 20 KM/H LATE IN THE AFTERNOON. HIGH 20. HUMIDEX 25. UV INDEX 3 OR MODERATE. CALEDON. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING. FOG PATCHES DISSIPATING NEAR NOON. HIGH 19. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 16. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. HIGH 19. UV INDEX 3 OR MODERATE. GODERICH - BLUEWATER - SOUTHERN HURON COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM. FOG PATCHES DISSIPATING NEAR NOON. WIND SOUTH 20 KM/H BECOMING LIGHT LATE THIS MORNING. HIGH 19. UV INDEX 5 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTH 20 KM/H BEFORE MORNING. LOW 13. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND SOUTH 20 KM/H BECOMING LIGHT IN THE MORNING. WIND BECOMING SOUTHWEST 30 IN THE AFTERNOON. HIGH 15. UV INDEX 3 OR MODERATE. WINGHAM - BLYTH - NORTHERN HURON COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM. FOG PATCHES DISSIPATING NEAR NOON. WIND SOUTHWEST 20 KM/H BECOMING LIGHT THIS AFTERNOON. HIGH 19. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 15. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 20 KM/H IN THE AFTERNOON. HIGH 18. UV INDEX 3 OR MODERATE. STRATFORD - MITCHELL - SOUTHERN PERTH COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM. WIND WEST 20 KM/H BECOMING SOUTH 20 THIS AFTERNOON. HIGH 19. UV INDEX 6 OR HIGH. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 15. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 20 KM/H IN THE AFTERNOON. HIGH 18. UV INDEX 3 OR MODERATE. LISTOWEL - MILVERTON - NORTHERN PERTH COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM. WIND BECOMING WEST 20 KM/H LATE THIS MORNING. HIGH 18. UV INDEX 5 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 15. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 30 KM/H LATE IN THE MORNING. HIGH 18. UV INDEX 3 OR MODERATE. KITCHENER - CAMBRIDGE - REGION OF WATERLOO. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM. FOG PATCHES DISSIPATING NEAR NOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 20. HUMIDEX 25. UV INDEX 5 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 13. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 30 KM/H LATE IN THE AFTERNOON. HIGH 19. UV INDEX 3 OR MODERATE. GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING. FOG PATCHES DISSIPATING NEAR NOON. HIGH 20. HUMIDEX 25. UV INDEX 5 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 13. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 30 KM/H LATE IN THE AFTERNOON. HIGH 19. UV INDEX 3 OR MODERATE. MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING. WIND SOUTHWEST 20 KM/H BECOMING LIGHT THIS AFTERNOON. HIGH 18. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 13. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. HIGH 17. UV INDEX 3 OR MODERATE. ORANGEVILLE - GRAND VALLEY - SOUTHERN DUFFERIN COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING. FOG PATCHES DISSIPATING NEAR NOON. HIGH 19. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 15. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. HIGH 19. UV INDEX 3 OR MODERATE. SHELBURNE - MANSFIELD - NORTHERN DUFFERIN COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM THIS MORNING. FOG PATCHES DISSIPATING NEAR NOON. WIND BECOMING SOUTHWEST 20 KM/H THIS AFTERNOON. HIGH 19. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 15. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. HIGH 19. UV INDEX 3 OR MODERATE. SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. FOG PATCHES DISSIPATING NEAR NOON. WIND SOUTHWEST 20 KM/H BECOMING LIGHT LATE THIS MORNING. HIGH 13. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 11. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. HIGH 15. UV INDEX 3 OR MODERATE. BRUCE PENINSULA - SAUBLE BEACH - TOBERMORY. TODAY..CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS MORNING AND LATE THIS AFTERNOON. FOG PATCHES DISSIPATING NEAR NOON. HIGH 8. UV INDEX 3 OR MODERATE. TONIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A THUNDERSTORM. LOW PLUS 4. THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A THUNDERSTORM. WIND BECOMING NORTHEAST 20 KM/H LATE IN THE AFTERNOON. HIGH PLUS 5. UV INDEX 3 OR MODERATE. HANOVER - DUNDALK - SOUTHERN GREY COUNTY. TODAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. FOG PATCHES DISSIPATING NEAR NOON. WIND SOUTHWEST 20 KM/H BECOMING LIGHT LATE THIS MORNING. HIGH 17. UV INDEX 4 OR MODERATE. TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 16. THURSDAY..SHOWERS WITH RISK OF A THUNDERSTORM. HIGH 18. UV INDEX 3 OR MODERATE. OWEN SOUND - BLUE MOUNTAINS - NORTHERN GREY COUNTY. TODAY..CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS MORNING AND LATE THIS AFTERNOON. HIGH 13. UV INDEX 3 OR MODERATE. TONIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A THUNDERSTORM. LOW 10. THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A THUNDERSTORM. HIGH 12. UV INDEX 3 OR MODERATE. REMAINDER UNCHANGED. END