779
FPCN11 CWTO 200016 AAA
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 8:16 P.M. EDT WEDNESDAY 19
AUGUST 2026 FOR TONIGHT THURSDAY AND THURSDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT THURSDAY.
BROCKVILLE - PRESCOTT.
TONIGHT..PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS THIS EVENING
AND RISK OF A THUNDERSTORM. CLEARING LATE THIS EVENING. FOG PATCHES
DEVELOPING OVERNIGHT. LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. FOG PATCHES DISSIPATING IN THE
MORNING. HIGH 24. HUMIDEX 27. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW 11.
MERRICKVILLE-WOLFORD - KEMPTVILLE.
TONIGHT..PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS THIS
EVENING. OTHERWISE CLEAR. RISK OF A THUNDERSTORM THIS EVENING. FOG
PATCHES DEVELOPING OVERNIGHT. LOW 12.
THURSDAY..MAINLY SUNNY. FOG PATCHES DISSIPATING IN THE MORNING.
HIGH 24. HUMIDEX 28. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..PARTLY CLOUDY. BECOMING CLEAR AFTER MIDNIGHT. FOG
PATCHES DEVELOPING OVERNIGHT. LOW 11.
OTTAWA NORTH - KANATA - ORLEANS.
TONIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. FOG PATCHES DEVELOPING OVERNIGHT.
LOW 12.
THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. RISK OF A
THUNDERSTORM IN THE AFTERNOON. FOG PATCHES DISSIPATING IN THE
MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY IN
THE EVENING. CLEARING NEAR MIDNIGHT. FOG PATCHES DEVELOPING
OVERNIGHT. LOW 11.
OTTAWA SOUTH - RICHMOND - METCALFE.
TONIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. FOG PATCHES DEVELOPING OVERNIGHT.
LOW 12.
THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. RISK OF A
THUNDERSTORM IN THE AFTERNOON. FOG PATCHES DISSIPATING IN THE
MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY IN
THE EVENING. CLEARING NEAR MIDNIGHT. FOG PATCHES DEVELOPING
OVERNIGHT. LOW 11.
GATINEAU.
TONIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. FOG PATCHES DEVELOPING OVERNIGHT.
LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE
AFTERNOON WITH RISK OF A THUNDERSTORM. FOG PATCHES DISSIPATING IN
THE MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY IN
THE EVENING. FOG PATCHES DEVELOPING OVERNIGHT. LOW 11.
PRESCOTT AND RUSSELL.
TONIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. FOG PATCHES DEVELOPING OVERNIGHT.
LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN THE
AFTERNOON WITH RISK OF A THUNDERSTORM. FOG PATCHES DISSIPATING IN
THE MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY IN
THE EVENING. CLEARING BEFORE MORNING. FOG PATCHES DEVELOPING
OVERNIGHT. LOW 11.
MORRISBURG - LONG SAULT.
TONIGHT..PARTLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS THIS EVENING
AND RISK OF A THUNDERSTORM. CLEARING NEAR MIDNIGHT. FOG PATCHES
DEVELOPING OVERNIGHT. LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE
IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. FOG PATCHES
DISSIPATING IN THE MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. RISK OF A THUNDERSTORM EARLY IN THE EVENING. FOG PATCHES
DEVELOPING OVERNIGHT. LOW 11.
CORNWALL - LANCASTER.
TONIGHT..PARTLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. FOG PATCHES DEVELOPING OVERNIGHT.
LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE
IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. FOG PATCHES
DISSIPATING IN THE MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. RISK OF A THUNDERSTORM EARLY IN THE EVENING. FOG PATCHES
DEVELOPING OVERNIGHT. LOW 11.
WINCHESTER - NEWINGTON.
TONIGHT..PARTLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS THIS
EVENING. BECOMING CLEAR LATE THIS EVENING AND OVERNIGHT. RISK OF A
THUNDERSTORM THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE
IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. FOG PATCHES
DISSIPATING IN THE MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. RISK OF A THUNDERSTORM EARLY IN THE EVENING. FOG PATCHES
DEVELOPING OVERNIGHT. LOW 11.
MAXVILLE - ALEXANDRIA.
TONIGHT..PARTLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. FOG PATCHES DEVELOPING OVERNIGHT.
LOW 12.
THURSDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE
IN THE AFTERNOON WITH RISK OF A THUNDERSTORM. FOG PATCHES
DISSIPATING IN THE MORNING. HIGH 24. HUMIDEX 29. UV INDEX 7 OR HIGH.
THURSDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. RISK OF A THUNDERSTORM EARLY IN THE EVENING. FOG PATCHES
DEVELOPING OVERNIGHT. LOW 11.
REMAINDER UNCHANGED.
END
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