518
FPCN11 CWTO 011252 AAB
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 8:50 A.M. EDT SATURDAY 1
AUGUST 2026 FOR TODAY AND SUNDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.M. EDT.
BROCKVILLE - PRESCOTT.
TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS MORNING. WIND
BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON.
HIGH 28. HUMIDEX 36. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY. SHOWERS BEGINNING OVERNIGHT. LOCAL AMOUNT
5 MM. LOW 19.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 24. HUMIDEX 32. UV INDEX 4 OR MODERATE.
WESTPORT - CHARLESTON LAKE.
TODAY..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS MORNING. WIND
BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON.
HIGH 28. HUMIDEX 36. UV INDEX 6 OR HIGH.
TONIGHT..CLOUDY. SHOWERS BEGINNING OVERNIGHT. LOCAL AMOUNT 5 MM.
LOW 19.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 25. HUMIDEX 32. UV INDEX 3 OR MODERATE.
MERRICKVILLE-WOLFORD - KEMPTVILLE.
TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS MORNING. WIND
BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON.
HIGH 28. HUMIDEX 36. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY. SHOWERS BEGINNING OVERNIGHT. LOCAL AMOUNT
5 MM. LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 24. HUMIDEX 32. UV INDEX 3 OR MODERATE.
OTTAWA NORTH - KANATA - ORLEANS.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 23. HUMIDEX 31. UV INDEX 3 OR MODERATE.
OTTAWA SOUTH - RICHMOND - METCALFE.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 24. HUMIDEX 32. UV INDEX 3 OR MODERATE.
GATINEAU.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 23. HUMIDEX 29. UV INDEX 3 OR MODERATE.
PRESCOTT AND RUSSELL.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 36. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 17.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 24. HUMIDEX 31. UV INDEX 3 OR MODERATE.
MORRISBURG - LONG SAULT.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 24. HUMIDEX 32. UV INDEX 4 OR MODERATE.
CORNWALL - LANCASTER.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 25. HUMIDEX 33. UV INDEX 4 OR MODERATE.
WINCHESTER - NEWINGTON.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 35. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 24. HUMIDEX 32. UV INDEX 4 OR MODERATE.
MAXVILLE - ALEXANDRIA.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 36. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 25. HUMIDEX 32. UV INDEX 3 OR MODERATE.
SMITHS FALLS - PERTH - EASTERN LANARK COUNTY.
TODAY..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING
SOUTHWEST 20 KM/H GUSTING TO 40 EARLY THIS AFTERNOON. HIGH 28.
HUMIDEX 36. UV INDEX 8 OR VERY HIGH.
TONIGHT..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING BEFORE MORNING. RISK OF A THUNDERSTORM THIS EVENING.
LOW 18.
SUNDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 20 TO 30 MM. HIGH 23. HUMIDEX 30. UV INDEX 3 OR MODERATE.
REMAINDER UNCHANGED.
END
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