566
FPCN11 CWTO 082229 AAD
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 6:28 P.M. EDT SATURDAY 8
AUGUST 2026 FOR TONIGHT SUNDAY AND SUNDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT SUNDAY.
GANANOQUE - MALLORYTOWN.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SUNDAY..A MIX OF SUN AND CLOUD. BECOMING SUNNY LATE IN THE MORNING.
HIGH 28. HUMIDEX 34. UV INDEX 8 OR VERY HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS IN THE EVENING. LOW 18.
BROCKVILLE - PRESCOTT.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SUNDAY..A MIX OF SUN AND CLOUD. CLEARING LATE IN THE MORNING.
HIGH 28. HUMIDEX 34. UV INDEX 8 OR VERY HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS. LOW 18.
WESTPORT - CHARLESTON LAKE.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SUNDAY..CLEARING IN THE MORNING. HIGH 28. HUMIDEX 34. UV INDEX 8 OR
VERY HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS EARLY IN THE EVENING. LOW 18.
MERRICKVILLE-WOLFORD - KEMPTVILLE.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SUNDAY..A MIX OF SUN AND CLOUD. CLEARING LATE IN THE MORNING.
HIGH 28. HUMIDEX 34. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS EARLY IN THE EVENING. LOW 18.
OTTAWA NORTH - KANATA - ORLEANS.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 20 KM/H
LATE THIS EVENING. LOW 18.
SUNDAY..CLEARING EARLY IN THE MORNING. WIND WEST 20 KM/H. HIGH 27.
HUMIDEX 34. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY IN THE EVENING. WIND WEST
20 KM/H BECOMING LIGHT NEAR MIDNIGHT. LOW 17.
OTTAWA SOUTH - RICHMOND - METCALFE.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 20 KM/H
LATE THIS EVENING. LOW 18.
SUNDAY..CLEARING EARLY IN THE MORNING. WIND WEST 20 KM/H. HIGH 27.
HUMIDEX 34. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY IN THE EVENING. WIND WEST
20 KM/H BECOMING LIGHT NEAR MIDNIGHT. LOW 17.
GATINEAU.
TONIGHT..CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY THIS EVENING WITH
RISK OF A THUNDERSTORM. LOW 18.
SUNDAY..CLEARING IN THE MORNING. WIND BECOMING WEST 20 KM/H IN THE
AFTERNOON. HIGH 27. HUMIDEX 32. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..A FEW CLOUDS. WIND WEST 20 KM/H BECOMING LIGHT NEAR
MIDNIGHT. LOW 17.
PRESCOTT AND RUSSELL.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING.
RISK OF A THUNDERSTORM EARLY THIS EVENING. LOW 20.
SUNDAY..A MIX OF SUN AND CLOUD. CLEARING IN THE AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY IN THE EVENING. LOW 19.
MORRISBURG - LONG SAULT.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING.
RISK OF A THUNDERSTORM EARLY THIS EVENING. LOW 19.
SUNDAY..A MIX OF SUN AND CLOUD. CLEARING LATE IN THE AFTERNOON.
HIGH 28. HUMIDEX 35. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS. LOW 17.
CORNWALL - LANCASTER.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING.
RISK OF A THUNDERSTORM EARLY THIS EVENING. LOW 19.
SUNDAY..A MIX OF SUN AND CLOUD. CLEARING LATE IN THE AFTERNOON.
HIGH 28. HUMIDEX 35. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS. LOW 17.
WINCHESTER - NEWINGTON.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING.
RISK OF A THUNDERSTORM EARLY THIS EVENING. LOW 19.
SUNDAY..CLEARING IN THE MORNING. HIGH 28. HUMIDEX 35. UV INDEX 7 OR
HIGH.
SUNDAY NIGHT..INCREASING CLOUDINESS. LOW 17.
MAXVILLE - ALEXANDRIA.
TONIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING.
RISK OF A THUNDERSTORM EARLY THIS EVENING. LOW 19.
SUNDAY..CLEARING IN THE MORNING. HIGH 28. HUMIDEX 35. UV INDEX 7 OR
HIGH.
SUNDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY IN THE EVENING. LOW 17.
PLEVNA - SHARBOT LAKE - WESTERN LANARK COUNTY.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 16.
SUNDAY..CLEARING IN THE MORNING. HIGH 25. HUMIDEX 30. UV INDEX 7 OR
HIGH.
SUNDAY NIGHT..PARTLY CLOUDY. LOW 17.
SMITHS FALLS - PERTH - EASTERN LANARK COUNTY.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SUNDAY..MAINLY CLOUDY. CLEARING LATE IN THE MORNING. HIGH 27. HUMIDEX
35. UV INDEX 7 OR HIGH.
SUNDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY IN THE EVENING. LOW 19.
REMAINDER UNCHANGED.
END
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