240
FPCN11 CWTO 180133 AAE
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 9:32 P.M. EDT WEDNESDAY 17
JUNE 2026 FOR TONIGHT THURSDAY AND THURSDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT THURSDAY.
WINDSOR - LEAMINGTON - ESSEX COUNTY.
TONIGHT..SHOWERS ENDING OVERNIGHT THEN CLOUDY WITH 60 PERCENT CHANCE
OF SHOWERS. RISK OF A THUNDERSTORM LATE THIS EVENING AND AFTER
MIDNIGHT. LOCAL AMOUNT 30 TO 40 MM. WIND SOUTH 50 KM/H GUSTING TO
80. LOW 16.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 23. HUMIDEX 27. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY IN THE
EVENING. CLEARING NEAR MIDNIGHT. WIND WEST 40 KM/H GUSTING TO 60
DIMINISHING TO 20 IN THE EVENING THEN BECOMING LIGHT AFTER MIDNIGHT.
LOW 13.
CHATHAM-KENT - RONDEAU PARK.
TONIGHT..SHOWERS ENDING OVERNIGHT THEN CLOUDY WITH 60 PERCENT CHANCE
OF SHOWERS. RISK OF A THUNDERSTORM LATE THIS EVENING AND AFTER
MIDNIGHT. LOCAL AMOUNT 30 TO 40 MM. WIND SOUTH 50 KM/H GUSTING TO
80. LOW 16.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 22. HUMIDEX 26. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY IN THE
EVENING. CLEARING OVERNIGHT. WIND WEST 40 KM/H GUSTING TO 60
DIMINISHING TO 20 IN THE EVENING THEN BECOMING LIGHT AFTER MIDNIGHT.
LOW 13.
RODNEY - SHEDDEN - WESTERN ELGIN COUNTY.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND SOUTHEAST 20 KM/H BECOMING SOUTHWEST 50 GUSTING TO 80
LATE THIS EVENING. LOW 15.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 21. HUMIDEX 25. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING THEN PARTLY CLOUDY. WIND NORTHWEST 20 KM/H BECOMING LIGHT
AFTER MIDNIGHT. LOW 12.
ST. THOMAS - AYLMER - EASTERN ELGIN COUNTY.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND SOUTHEAST 20 KM/H BECOMING SOUTHWEST 50 GUSTING TO 80
LATE THIS EVENING. LOW 15.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 21. HUMIDEX 25. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT THEN PARTLY CLOUDY. WIND WEST 30 KM/H
BECOMING LIGHT IN THE EVENING. LOW 12.
LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND BECOMING SOUTHEAST 20 KM/H GUSTING TO 40 THEN SOUTHWEST
50 GUSTING TO 80 AFTER MIDNIGHT. LOW 14.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 50 KM/H GUSTING TO 80. HIGH 21. UV INDEX 6 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT. WIND WEST 30 KM/H BECOMING LIGHT IN THE
EVENING. LOW 12.
SIMCOE - DELHI - NORFOLK.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND BECOMING SOUTHEAST 20 KM/H GUSTING TO 40 THEN SOUTH 40
GUSTING TO 80 AFTER MIDNIGHT. LOW 14.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 22. HUMIDEX 25. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT. WIND WEST 30 KM/H GUSTING TO 50 BECOMING
LIGHT NEAR MIDNIGHT. LOW 12.
DUNNVILLE - CALEDONIA - HALDIMAND.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND BECOMING SOUTHEAST 20 KM/H GUSTING TO 40 THEN SOUTH 40
GUSTING TO 80 AFTER MIDNIGHT. LOW 14.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 22. HUMIDEX 25. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT. WIND WEST 30 KM/H BECOMING LIGHT NEAR
MIDNIGHT. LOW 13.
WOODSTOCK - TILLSONBURG - OXFORD COUNTY.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND BECOMING SOUTHEAST 20 KM/H GUSTING TO 40 THEN SOUTH 40
GUSTING TO 70 AFTER MIDNIGHT. LOW 14.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 70. HIGH 21. UV INDEX 6 OR HIGH.
THURSDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT THEN PARTLY CLOUDY. WIND WEST 30 KM/H
BECOMING LIGHT NEAR MIDNIGHT. LOW 12.
BRANTFORD - COUNTY OF BRANT.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND BECOMING SOUTHEAST 20 KM/H GUSTING TO 40 THEN SOUTH 40
GUSTING TO 70 AFTER MIDNIGHT. LOW 14.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 70. HIGH 21. UV INDEX 6 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT. WIND WEST 30 KM/H BECOMING LIGHT NEAR
MIDNIGHT. LOW 13.
NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION.
TONIGHT..CLOUDY. SHOWERS BEGINNING LATE THIS EVENING. RISK OF A
THUNDERSTORM. LOCAL AMOUNT 20 TO 30 MM. WIND BECOMING SOUTHEAST
20 KM/H THEN SOUTHWEST 40 GUSTING TO 80 AFTER MIDNIGHT. LOW 15.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A
THUNDERSTORM. WIND SOUTHWEST 40 KM/H GUSTING TO 90. HIGH 23. HUMIDEX
26. UV INDEX 6 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS IN THE
EVENING. WIND WEST 30 KM/H. LOW 14.
ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION.
TONIGHT..CLOUDY. SHOWERS BEGINNING LATE THIS EVENING. RISK OF A
THUNDERSTORM. LOCAL AMOUNT 20 TO 30 MM. WIND BECOMING SOUTHEAST
20 KM/H THEN SOUTHWEST 40 GUSTING TO 80 AFTER MIDNIGHT. LOW 15.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A
THUNDERSTORM. WIND SOUTHWEST 40 KM/H GUSTING TO 80. HIGH 23. HUMIDEX
26. UV INDEX 6 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS IN THE
EVENING. WIND WEST 30 KM/H GUSTING TO 50. LOW 14.
CITY OF HAMILTON.
TONIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOCAL AMOUNT 20 TO
30 MM. WIND BECOMING SOUTHEAST 20 KM/H THEN SOUTHWEST 40 GUSTING TO
70 AFTER MIDNIGHT. LOW 14.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE MORNING AND IN THE AFTERNOON. WIND
SOUTHWEST 40 KM/H GUSTING TO 70. HIGH 22. HUMIDEX 25. UV INDEX 6 OR
HIGH.
THURSDAY NIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT THEN PARTLY CLOUDY. WIND WEST 30 KM/H
BECOMING LIGHT NEAR MIDNIGHT. LOW 13.
REMAINDER UNCHANGED.
END
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