FPCN11 CWTO 210939 AAB UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA AT 5:38 A.M. EDT TUESDAY 21 APRIL 2026 FOR TODAY AND WEDNESDAY. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.M. EDT. KINGSTON - ODESSA - FRONTENAC ISLANDS. TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 7. WIND CHILL MINUS 3 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY AFTER MIDNIGHT. LOW PLUS 3. WEDNESDAY..MAINLY SUNNY. HIGH 15. UV INDEX 6 OR HIGH. LINDSAY - SOUTHERN KAWARTHA LAKES. TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 8. WIND CHILL MINUS 12 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..A FEW CLOUDS. LOW ZERO. WEDNESDAY..MAINLY CLOUDY. CLEARING LATE IN THE AFTERNOON. HIGH 16. UV INDEX 5 OR MODERATE. FENELON FALLS - BALSAM LAKE PARK - NORTHERN KAWARTHA LAKES. TODAY..CLOUDY WITH 30 PERCENT CHANCE OF FLURRIES THIS MORNING. CLEARING THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 8. WIND CHILL MINUS 12 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..A FEW CLOUDS. LOW ZERO. WEDNESDAY..MAINLY CLOUDY. HIGH 15. UV INDEX 6 OR HIGH. PETERBOROUGH CITY - LAKEFIELD - SOUTHERN PETERBOROUGH COUNTY. TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 8. WIND CHILL MINUS 7 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..A FEW CLOUDS. LOW ZERO. WEDNESDAY..MAINLY CLOUDY. CLEARING LATE IN THE AFTERNOON. HIGH 16. UV INDEX 5 OR MODERATE. APSLEY - WOODVIEW - NORTHERN PETERBOROUGH COUNTY. TODAY..CLOUDY WITH 30 PERCENT CHANCE OF FLURRIES THIS MORNING. CLEARING THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 8. WIND CHILL MINUS 12 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..A FEW CLOUDS. LOW ZERO. WEDNESDAY..MAINLY CLOUDY. HIGH 15. UV INDEX 6 OR HIGH. STIRLING - TWEED - MADOC. TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 8. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY AFTER MIDNIGHT. LOW PLUS 3. WEDNESDAY..MAINLY SUNNY. HIGH 15. UV INDEX 6 OR HIGH. TAMWORTH - SYDENHAM - SOUTH FRONTENAC. TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 7. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY AFTER MIDNIGHT. LOW PLUS 3. WEDNESDAY..MAINLY SUNNY. HIGH 15. UV INDEX 6 OR HIGH. KALADAR - BANNOCKBURN - BON ECHO PARK. TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF FLURRIES THIS MORNING THEN 30 PERCENT CHANCE OF RAIN SHOWERS EARLY THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 7. WIND CHILL MINUS 14 THIS MORNING. UV INDEX 4 OR MODERATE. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 4 OVERNIGHT. WEDNESDAY..MAINLY SUNNY. HIGH 14. UV INDEX 6 OR HIGH. BANCROFT - HASTINGS HIGHLANDS - DENBIGH. TODAY..INCREASING CLOUDINESS. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING THEN 60 PERCENT CHANCE OF RAIN EARLY THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 4 OR MODERATE. TONIGHT..PARTLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. WEDNESDAY..SUNNY. HIGH 14. UV INDEX 6 OR HIGH. GANANOQUE - MALLORYTOWN. TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 8. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY AFTER MIDNIGHT. LOW PLUS 3. WEDNESDAY..MAINLY SUNNY. HIGH 14. UV INDEX 6 OR HIGH. BROCKVILLE - PRESCOTT. TODAY..CLEAR EARLY THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 8. WIND CHILL MINUS 7 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. WESTPORT - CHARLESTON LAKE. TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 8. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY AFTER MIDNIGHT. LOW PLUS 3. WEDNESDAY..MAINLY SUNNY. HIGH 14. UV INDEX 6 OR HIGH. MERRICKVILLE-WOLFORD - KEMPTVILLE. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 8. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. OTTAWA NORTH - KANATA - ORLEANS. TODAY..CLEAR EARLY THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 8. WIND CHILL MINUS 7 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. OTTAWA SOUTH - RICHMOND - METCALFE. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 8. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. GATINEAU. TODAY..CLEAR EARLY THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 7. WIND CHILL MINUS 7 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 2. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. PRESCOTT AND RUSSELL. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 7. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH. MORRISBURG - LONG SAULT. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 9. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH. CORNWALL - LANCASTER. TODAY..CLEAR EARLY THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 9. WIND CHILL MINUS 6 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH. WINCHESTER - NEWINGTON. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 9. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH. MAXVILLE - ALEXANDRIA. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 10. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 3. WEDNESDAY..CLEARING IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH. PLEVNA - SHARBOT LAKE - WESTERN LANARK COUNTY. TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF FLURRIES THIS MORNING THEN 30 PERCENT CHANCE OF RAIN SHOWERS EARLY THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 7. WIND CHILL MINUS 12 THIS MORNING. UV INDEX 4 OR MODERATE. TONIGHT..MAINLY CLOUDY. LOW PLUS 2. WEDNESDAY..MAINLY SUNNY. HIGH 13. UV INDEX 6 OR HIGH. SMITHS FALLS - PERTH - EASTERN LANARK COUNTY. TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS AFTERNOON. WIND UP TO 15 KM/H. HIGH 7. WIND CHILL MINUS 12 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING. LOW PLUS 2. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. PORT CARLING - PORT SEVERN. TODAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. CLEARING NEAR NOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 THIS MORNING. HIGH 9. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..PARTLY CLOUDY. BECOMING CLOUDY OVERNIGHT. WIND SOUTHEAST 20 KM/H BECOMING LIGHT THIS EVENING. LOW PLUS 1. WEDNESDAY..A MIX OF SUN AND CLOUD. CLEARING EARLY IN THE AFTERNOON. HIGH 12. UV INDEX 6 OR HIGH. BRACEBRIDGE - GRAVENHURST. TODAY..CLEAR EARLY THIS MORNING THEN A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 8. WIND CHILL MINUS 7 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..PARTLY CLOUDY. LOW PLUS 1. WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 15. UV INDEX 6 OR HIGH. TOWN OF PARRY SOUND - ROSSEAU - KILLBEAR PARK. TODAY..CLOUDY WITH 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING THEN A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 THIS MORNING. HIGH 10. WIND CHILL MINUS 7 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. LOW MINUS 1. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. HUNTSVILLE - BAYSVILLE. TODAY..A MIX OF SUN AND CLOUD. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 9. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. LOW MINUS 1. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. HALIBURTON - MINDEN - SOUTHERN HALIBURTON COUNTY. TODAY..CLOUDY WITH 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. CLEARING THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 13 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..PARTLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 4 OVERNIGHT. WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 15. UV INDEX 6 OR HIGH. OXTONGUE LAKE - FORT IRWIN - NORTHERN HALIBURTON COUNTY. TODAY..A MIX OF SUN AND CLOUD. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 13 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 4 OVERNIGHT. WEDNESDAY..CLEARING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. BARRY'S BAY - KILLALOE. TODAY..CLOUDY. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING THEN 60 PERCENT CHANCE OF RAIN EARLY THIS AFTERNOON. CLEARING THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 14 THIS MORNING. UV INDEX 4 OR MODERATE. TONIGHT..PARTLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. WEDNESDAY..SUNNY. WIND UP TO 15 KM/H. HIGH 14. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. RENFREW - ARNPRIOR - CALABOGIE. TODAY..CLOUDY. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING THEN 60 PERCENT CHANCE OF RAIN EARLY THIS AFTERNOON. CLEARING THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 14 THIS MORNING. UV INDEX 4 OR MODERATE. TONIGHT..PARTLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. WEDNESDAY..SUNNY. WIND UP TO 15 KM/H. HIGH 14. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. PETAWAWA - PEMBROKE - COBDEN. TODAY..INCREASING CLOUDINESS. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING THEN 60 PERCENT CHANCE OF RAIN EARLY THIS AFTERNOON. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 10 THIS MORNING. UV INDEX 4 OR MODERATE. TONIGHT..PARTLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. WEDNESDAY..SUNNY. WIND UP TO 15 KM/H. HIGH 14. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. WESTERN ALGONQUIN PARK - LAKE OF TWO RIVERS. TODAY..A MIX OF SUN AND CLOUD. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 16 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 4 OVERNIGHT. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. DEEP RIVER - WHITNEY - EASTERN ALGONQUIN PARK. TODAY..A MIX OF SUN AND CLOUD. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 7. WIND CHILL MINUS 10 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 4 OVERNIGHT. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. BAYFIELD INLET - DUNCHURCH. TODAY..CLOUDY WITH 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING THEN A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 THIS MORNING. HIGH 9. WIND CHILL MINUS 11 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. LOW MINUS 1. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. SOUTH RIVER - BURK'S FALLS. TODAY..A MIX OF SUN AND CLOUD. 60 PERCENT CHANCE OF LIGHT SNOW THIS MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 LATE THIS MORNING. HIGH 9. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. LOW MINUS 1. WEDNESDAY..CLEARING IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. REMAINDER UNCHANGED. END