FPCN11 CWTO 051942 AAA

UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL

REGION ISSUED BY ENVIRONMENT CANADA AT 3:40 P.M. EDT TUESDAY 5 MAY

2026 FOR TONIGHT WEDNESDAY AND WEDNESDAY NIGHT.

THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT

WEDNESDAY.



SARNIA - PETROLIA - WESTERN LAMBTON COUNTY.

TONIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS LATE THIS

 EVENING AND OVERNIGHT. LOW 7.

WEDNESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 12. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. LOW PLUS 2.



WATFORD - PINERY PARK - EASTERN LAMBTON COUNTY.

TONIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS LATE THIS

 EVENING AND OVERNIGHT. LOW 6.

WEDNESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 12. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. LOW PLUS 2.



STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY.

TONIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS LATE THIS

 EVENING AND OVERNIGHT. LOW 6.

WEDNESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 12. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. LOW PLUS 2.



LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY.

TONIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS OVERNIGHT.

 LOW 6.

WEDNESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 12. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. LOW PLUS 2.



GODERICH - BLUEWATER - SOUTHERN HURON COUNTY.

TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. LOW

 PLUS 4.

WEDNESDAY..A MIX OF SUN AND CLOUD. 40 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 13. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. WIND

 NORTHWEST 20 KM/H BECOMING LIGHT IN THE EVENING. LOW MINUS 2.



WINGHAM - BLYTH - NORTHERN HURON COUNTY.

TONIGHT..MAINLY CLOUDY. WIND WEST 20 KM/H BECOMING LIGHT EARLY THIS

 EVENING. LOW PLUS 4.

WEDNESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING NORTHWEST 20 KM/H IN

 THE AFTERNOON. HIGH 13. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. WIND

 NORTHWEST 20 KM/H BECOMING LIGHT IN THE EVENING. LOW MINUS 2.



STRATFORD - MITCHELL - SOUTHERN PERTH COUNTY.

TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. WIND

 WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT EARLY THIS EVENING. LOW

 PLUS 5.

WEDNESDAY..A MIX OF SUN AND CLOUD. 40 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 12. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. WIND

 NORTHWEST 20 KM/H BECOMING LIGHT IN THE EVENING. LOW ZERO.



LISTOWEL - MILVERTON - NORTHERN PERTH COUNTY.

TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. WIND

 WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT EARLY THIS EVENING. LOW

 PLUS 5.

WEDNESDAY..A MIX OF SUN AND CLOUD. 40 PERCENT CHANCE OF SHOWERS EARLY

 IN THE MORNING. WIND BECOMING NORTHWEST 20 KM/H IN THE AFTERNOON.

 HIGH 12. UV INDEX 6 OR HIGH.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. WIND

 NORTHWEST 20 KM/H BECOMING LIGHT IN THE EVENING. LOW MINUS 1.



MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY.

TONIGHT..MAINLY CLOUDY. LOW PLUS 5.

WEDNESDAY..MAINLY CLOUDY. HIGH 11. UV INDEX 5 OR MODERATE.

WEDNESDAY NIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. LOW ZERO.



REMAINDER UNCHANGED.



END