519  
FPCN11 CWTO 181915  
FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED  
BY ENVIRONMENT CANADA AT 3:30 P.M. EDT THURSDAY 18 JULY 2019 FOR  
TONIGHT FRIDAY AND FRIDAY NIGHT.  
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT FRIDAY.  
 
CITY OF TORONTO  
BURLINGTON - OAKVILLE  
HALTON HILLS - MILTON  
MISSISSAUGA - BRAMPTON  
VAUGHAN - RICHMOND HILL - MARKHAM  
PICKERING - OSHAWA - SOUTHERN DURHAM REGION.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS OVERNIGHT WITH  
RISK OF A THUNDERSTORM. WIND SOUTH 20 KM/H BECOMING LIGHT THIS  
EVENING. LOW 23.  
FRIDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A  
THUNDERSTORM. WIND WEST 20 KM/H GUSTING TO 40. HIGH 34. HUMIDEX 41.  
UV INDEX 8 OR VERY HIGH.  
FRIDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE  
EVENING WITH RISK OF A THUNDERSTORM. WIND WEST 20 KM/H GUSTING TO 40  
BECOMING LIGHT IN THE EVENING. LOW 22.  
 
WINDSOR - ESSEX - CHATHAM-KENT.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS AND RISK OF  
A THUNDERSTORM. WIND SOUTHWEST 20 KM/H GUSTING TO 40. LOW 25.  
FRIDAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS.  
RISK OF A THUNDERSTORM. WIND SOUTHWEST 20 KM/H GUSTING TO 40.  
HIGH 35. HUMIDEX 46. UV INDEX 10 OR VERY HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS IN THE  
EVENING AND RISK OF A THUNDERSTORM. CLEARING OVERNIGHT. WIND  
SOUTHWEST 20 KM/H GUSTING TO 40. LOW 25.  
 
SARNIA - LAMBTON.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS AND RISK OF  
A THUNDERSTORM. WIND SOUTHWEST 20 KM/H GUSTING TO 40. LOW 24.  
FRIDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.  
RISK OF A THUNDERSTORM. WIND BECOMING WEST 20 KM/H GUSTING TO 40  
LATE IN THE MORNING. HIGH 34. HUMIDEX 45. UV INDEX 10 OR VERY HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE  
EVENING WITH RISK OF A THUNDERSTORM. WIND SOUTHWEST 20 KM/H GUSTING  
TO 40 BECOMING LIGHT IN THE EVENING. LOW 24.  
 
ELGIN  
LONDON - MIDDLESEX  
SIMCOE - DELHI - NORFOLK  
DUNNVILLE - CALEDONIA - HALDIMAND  
OXFORD - BRANT.  
HEAT WARNING IN EFFECT.  
TONIGHT..A FEW CLOUDS. INCREASING CLOUDINESS THIS EVENING THEN  
60 PERCENT CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. RISK  
OF A THUNDERSTORM LATE THIS EVENING AND OVERNIGHT. WIND SOUTH  
20 KM/H GUSTING TO 40. LOW 23.  
FRIDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.  
RISK OF A THUNDERSTORM. WIND BECOMING WEST 20 KM/H GUSTING TO 40  
LATE IN THE MORNING. HIGH 34. HUMIDEX 45. UV INDEX 10 OR VERY HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE  
EVENING WITH RISK OF A THUNDERSTORM. WIND SOUTHWEST 20 KM/H GUSTING  
TO 40 BECOMING LIGHT IN THE EVENING. LOW 24.  
 
NIAGARA  
CITY OF HAMILTON.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS OVERNIGHT WITH  
RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST 30 KM/H GUSTING TO  
50 NEAR MIDNIGHT. LOW 23.  
FRIDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.  
RISK OF A THUNDERSTORM. WIND SOUTHWEST 30 KM/H GUSTING TO 50.  
HIGH 34. HUMIDEX 41. UV INDEX 10 OR VERY HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE  
EVENING WITH RISK OF A THUNDERSTORM. WIND SOUTHWEST 20 KM/H BECOMING  
LIGHT IN THE EVENING. LOW 22.  
 
CALEDON  
NEWMARKET - GEORGINA - NORTHERN YORK REGION  
UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION  
HURON - PERTH  
WATERLOO - WELLINGTON  
DUFFERIN - INNISFIL.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS LATE THIS  
EVENING AND OVERNIGHT WITH RISK OF A THUNDERSTORM. WIND BECOMING  
SOUTH 20 KM/H GUSTING TO 40 EARLY THIS EVENING. LOW 22.  
FRIDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.  
RISK OF A THUNDERSTORM. WIND WEST 20 KM/H GUSTING TO 40. HIGH 33.  
HUMIDEX 41. UV INDEX 10 OR VERY HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY IN  
THE EVENING WITH RISK OF A THUNDERSTORM. WIND WEST 20 KM/H GUSTING  
TO 40 BECOMING LIGHT IN THE EVENING. LOW 22.  
 
SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY  
HANOVER - DUNDALK - SOUTHERN GREY COUNTY  
OWEN SOUND - BLUE MOUNTAINS - NORTHERN GREY COUNTY.  
HEAT WARNING IN EFFECT.  
TONIGHT..A FEW CLOUDS. INCREASING CLOUDINESS THIS EVENING THEN  
60 PERCENT CHANCE OF SHOWERS THIS EVENING AND OVERNIGHT. RISK OF A  
THUNDERSTORM THIS EVENING AND OVERNIGHT. WIND SOUTHWEST 20 KM/H  
BECOMING LIGHT NEAR MIDNIGHT. LOW 21.  
FRIDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 31. HUMIDEX  
40. UV INDEX 8 OR VERY HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY IN  
THE EVENING WITH RISK OF A THUNDERSTORM. WIND WEST 20 KM/H BECOMING  
LIGHT IN THE EVENING. LOW 21.  
 
BRUCE PENINSULA - SAUBLE BEACH - TOBERMORY.  
TONIGHT..A FEW CLOUDS. INCREASING CLOUDINESS THIS EVENING THEN  
60 PERCENT CHANCE OF SHOWERS THIS EVENING AND OVERNIGHT. RISK OF A  
THUNDERSTORM THIS EVENING AND OVERNIGHT. WIND SOUTHWEST 20 KM/H  
BECOMING LIGHT NEAR MIDNIGHT. LOW 17.  
FRIDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 29. HUMIDEX  
34. UV INDEX 8 OR VERY HIGH.  
FRIDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY IN  
THE EVENING AND OVERNIGHT. RISK OF A THUNDERSTORM. WIND WEST 20 KM/H  
BECOMING LIGHT IN THE EVENING. LOW 19.  
 
BARRIE - ORILLIA - MIDLAND.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY THIS EVENING WITH 60 PERCENT  
CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. RISK OF A  
THUNDERSTORM LATE THIS EVENING AND OVERNIGHT. WIND SOUTHWEST 20 KM/H  
BECOMING LIGHT NEAR MIDNIGHT. LOW 20.  
FRIDAY..CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 31. HUMIDEX  
39. UV INDEX 6 OR HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. WIND WEST 20 KM/H BECOMING LIGHT IN THE  
EVENING. LOW 21.  
 
BELLEVILLE - QUINTE - NORTHUMBERLAND  
KINGSTON - PRINCE EDWARD  
LINDSAY - SOUTHERN KAWARTHA LAKES  
PETERBOROUGH CITY - LAKEFIELD - SOUTHERN PETERBOROUGH COUNTY  
STIRLING - TWEED - SOUTH FRONTENAC  
BROCKVILLE - LEEDS AND GRENVILLE.  
HEAT WARNING IN EFFECT.  
TONIGHT..A FEW CLOUDS. INCREASING CLOUDINESS LATE THIS EVENING THEN  
60 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM  
OVERNIGHT. LOW 21.  
FRIDAY..MAINLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 32. HUMIDEX  
37. UV INDEX 7 OR HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE  
EVENING WITH RISK OF A THUNDERSTORM. WIND WEST 20 KM/H BECOMING  
LIGHT IN THE EVENING. LOW 21.  
 
FENELON FALLS - BALSAM LAKE PARK - NORTHERN KAWARTHA LAKES  
APSLEY - WOODVIEW - NORTHERN PETERBOROUGH COUNTY  
KALADAR - BANNOCKBURN - BON ECHO PARK  
SMITHS FALLS - LANARK - SHARBOT LAKE.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY NEAR MIDNIGHT WITH 60 PERCENT  
CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM OVERNIGHT.  
LOW 20.  
FRIDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 31. HUMIDEX  
37. UV INDEX 6 OR HIGH.  
FRIDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE EVENING  
THEN PARTLY CLOUDY. RISK OF A THUNDERSTORM IN THE EVENING. WIND WEST  
20 KM/H BECOMING LIGHT IN THE EVENING. LOW 20.  
 
BANCROFT - HASTINGS HIGHLANDS - DENBIGH  
HALIBURTON  
RENFREW - PEMBROKE - BARRY'S BAY.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY NEAR MIDNIGHT WITH 60 PERCENT  
CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. RISK OF A  
THUNDERSTORM LATE THIS EVENING AND OVERNIGHT. LOW 20.  
FRIDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 31. HUMIDEX  
37. UV INDEX 6 OR HIGH.  
FRIDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS EARLY IN THE  
EVENING THEN PARTLY CLOUDY. RISK OF A THUNDERSTORM EARLY IN THE  
EVENING. WIND WEST 20 KM/H BECOMING LIGHT IN THE EVENING. LOW 20.  
 
CITY OF OTTAWA  
GATINEAU  
PRESCOTT AND RUSSELL.  
HEAT WARNING IN EFFECT.  
TONIGHT..A FEW CLOUDS. INCREASING CLOUDINESS NEAR MIDNIGHT THEN  
60 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM  
OVERNIGHT. LOW 20.  
FRIDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND SOUTHWEST 20 KM/H. HIGH 32. HUMIDEX 37. UV  
INDEX 6 OR HIGH.  
FRIDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS EARLY IN THE  
EVENING AND RISK OF A THUNDERSTORM. CLEARING IN THE EVENING. WIND  
SOUTHWEST 20 KM/H BECOMING LIGHT IN THE EVENING. LOW 20.  
 
CORNWALL - MORRISBURG.  
HEAT WARNING IN EFFECT.  
TONIGHT..A FEW CLOUDS. INCREASING CLOUDINESS AFTER MIDNIGHT THEN  
30 PERCENT CHANCE OF SHOWERS BEFORE MORNING. RISK OF A THUNDERSTORM  
BEFORE MORNING. LOW 21.  
FRIDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND SOUTHWEST 20 KM/H. HIGH 32. HUMIDEX 38. UV  
INDEX 6 OR HIGH.  
FRIDAY NIGHT..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS IN THE EVENING  
AND RISK OF A THUNDERSTORM. CLEARING NEAR MIDNIGHT. WIND SOUTHWEST  
20 KM/H BECOMING LIGHT IN THE EVENING. LOW 21.  
 
PARRY SOUND - MUSKOKA.  
HEAT WARNING IN EFFECT.  
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY THIS EVENING WITH 60 PERCENT  
CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. RISK OF A  
THUNDERSTORM LATE THIS EVENING AND OVERNIGHT. WIND SOUTH 20 KM/H  
BECOMING LIGHT NEAR MIDNIGHT. LOW 20.  
FRIDAY..CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS AND RISK OF A  
THUNDERSTORM. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 31. HUMIDEX  
39. UV INDEX 6 OR HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. WIND WEST 20 KM/H BECOMING LIGHT IN THE  
EVENING. LOW 21.  
 
ALGONQUIN.  
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY LATE THIS EVENING WITH  
60 PERCENT CHANCE OF SHOWERS LATE THIS EVENING AND OVERNIGHT. RISK  
OF A THUNDERSTORM LATE THIS EVENING AND OVERNIGHT. LOW 19.  
FRIDAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. BECOMING A MIX OF  
SUN AND CLOUD LATE IN THE AFTERNOON. RISK OF A THUNDERSTORM. WIND  
BECOMING WEST 20 KM/H NEAR NOON. HIGH 30. HUMIDEX 36. UV INDEX 6 OR  
HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. WIND WEST 20 KM/H BECOMING LIGHT IN THE  
EVENING. LOW 19.  
 
BURK'S FALLS - BAYFIELD INLET.  
TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY THIS EVENING WITH 60 PERCENT  
CHANCE OF SHOWERS THIS EVENING AND OVERNIGHT. RISK OF A THUNDERSTORM  
THIS EVENING AND OVERNIGHT. WIND SOUTH 20 KM/H BECOMING LIGHT NEAR  
MIDNIGHT. LOW 20.  
FRIDAY..CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. BECOMING A MIX OF  
SUN AND CLOUD LATE IN THE AFTERNOON. RISK OF A THUNDERSTORM. WIND  
BECOMING WEST 20 KM/H NEAR NOON. HIGH 30. HUMIDEX 39. UV INDEX 6 OR  
HIGH.  
FRIDAY NIGHT..PARTLY CLOUDY. WIND WEST 20 KM/H BECOMING LIGHT IN THE  
EVENING. LOW 20.  
 
END  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab IN Page Main Text Page