FPCN12 CWTO 201946 FORECASTS FOR NORTHERN ONTARIO ISSUED BY ENVIRONMENT CANADA AT 4:00 P.M. EDT WEDNESDAY 20 MAY 2026 FOR TONIGHT THURSDAY AND THURSDAY NIGHT. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:30 A.M. EDT THURSDAY. CITY OF THUNDER BAY. TONIGHT..CLEARING EARLY THIS EVENING. LOW ZERO WITH PATCHY FROST. THURSDAY..SUNNY. WIND BECOMING SOUTHEAST 20 KM/H LATE IN THE MORNING. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND EAST 20 KM/H BECOMING LIGHT NEAR MIDNIGHT. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. KENORA - GRASSY NARROWS - WHITEDOG. TONIGHT..CLEAR. BECOMING PARTLY CLOUDY THIS EVENING. LOW 6. THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS. WIND BECOMING SOUTH 20 KM/H LATE IN THE MORNING. HIGH 19. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. BECOMING PARTLY CLOUDY LATE IN THE EVENING. LOW 9. SIOUX NARROWS - NESTOR FALLS - MORSON. TONIGHT..A FEW CLOUDS. LOW 6. THURSDAY..SUNNY. WIND BECOMING SOUTH 20 KM/H LATE IN THE MORNING. HIGH 19. UV INDEX 6 OR HIGH. THURSDAY NIGHT..A FEW CLOUDS. LOW 9. DRYDEN - VERMILION BAY. TONIGHT..CLEAR. LOW PLUS 3 WITH RISK OF FROST. THURSDAY..SUNNY. WIND BECOMING SOUTH 20 KM/H LATE IN THE AFTERNOON. HIGH 16. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND SOUTH 20 KM/H BECOMING LIGHT IN THE EVENING. LOW PLUS 5. IGNACE - ENGLISH RIVER. TONIGHT..CLEARING EARLY THIS EVENING. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..SUNNY. WIND BECOMING SOUTH 20 KM/H LATE IN THE AFTERNOON. HIGH 16. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND SOUTH 20 KM/H BECOMING LIGHT IN THE EVENING. LOW PLUS 5. FORT FRANCES - EMO - RAINY RIVER. TONIGHT..CLEAR. LOW PLUS 4. THURSDAY..SUNNY. HIGH 18. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEARING LATE IN THE EVENING. LOW PLUS 5. SEINE RIVER VILLAGE - MINE CENTRE. TONIGHT..CLEAR. LOW PLUS 4. THURSDAY..SUNNY. HIGH 18. UV INDEX 6 OR HIGH. THURSDAY NIGHT..A FEW CLOUDS. LOW PLUS 5. ATIKOKAN - SHEBANDOWAN - QUETICO PARK. TONIGHT..CLEARING THIS EVENING. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. HIGH 16. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. UPSALA - RAITH. TONIGHT..CLEARING THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 4 OVERNIGHT. THURSDAY..SUNNY. HIGH 16. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. CLOUD BAY - DORION. TONIGHT..CLEARING THIS EVENING. LOW ZERO WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 4 OVERNIGHT. KAKABEKA FALLS - WHITEFISH LAKE - ARROW LAKE. TONIGHT..CLEARING THIS EVENING. LOW ZERO WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 4 OVERNIGHT. RED LAKE - WOODLAND CARIBOU PARK. TONIGHT..CLEAR. INCREASING CLOUDINESS AFTER MIDNIGHT THEN 60 PERCENT CHANCE OF SHOWERS OVERNIGHT. LOW PLUS 3 WITH RISK OF FROST. THURSDAY..SHOWERS. HIGH 12. UV INDEX 2 OR LOW. THURSDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY IN THE EVENING. LOW PLUS 5. EAR FALLS - PERRAULT FALLS - WESTERN LAC SEUL. TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. LOW PLUS 2 WITH RISK OF FROST. THURSDAY..A MIX OF SUN AND CLOUD WITH 60 PERCENT CHANCE OF SHOWERS. HIGH 12. UV INDEX 6 OR HIGH. THURSDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY IN THE EVENING. OTHERWISE CLEAR. LOW 6. SIOUX LOOKOUT - EASTERN LAC SEUL. TONIGHT..CLEAR. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH 60 PERCENT CHANCE OF SHOWERS. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY IN THE EVENING. OTHERWISE CLEAR. LOW PLUS 2. SAVANT LAKE - STURGEON LAKE. TONIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 2. GULL BAY - BLACK STURGEON LAKE. TONIGHT..CLEAR. WIND WEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 1. THURSDAY..SUNNY. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1. BEARDMORE - JELLICOE - MACDIARMID. TONIGHT..CLEAR. LOW MINUS 1. THURSDAY..SUNNY. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1. ARMSTRONG - AUDEN - WABAKIMI PARK. TONIGHT..CLEAR. WIND WEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 2. WIND CHILL MINUS 4 OVERNIGHT. THURSDAY..SUNNY. WIND UP TO 15 KM/H. HIGH 15. WIND CHILL MINUS 3 IN THE MORNING. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 4. WIND CHILL MINUS 6 OVERNIGHT. GERALDTON - LONGLAC - CARAMAT. TONIGHT..MAINLY CLOUDY. CLEARING LATE THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. MANITOUWADGE - HORNEPAYNE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY NEAR MIDNIGHT. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..MAINLY CLOUDY. CLEARING NEAR NOON. WIND UP TO 15 KM/H. HIGH 15. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. NAKINA - AROLAND - PAGWA. TONIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. HIGH 15. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. NIPIGON - ROSSPORT. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW ZERO WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 10. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. MARATHON - SCHREIBER. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW ZERO WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 10. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. WAWA - PUKASKWA PARK. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 11. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. WHITE RIVER - DUBREUILVILLE. TONIGHT..MAINLY CLOUDY. CLEARING THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 11. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. SAULT STE. MARIE - ST. JOSEPH ISLAND. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. WIND NORTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT EARLY THIS EVENING. WIND BECOMING NORTHWEST 20 LATE THIS EVENING. LOW ZERO WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 13. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. SEARCHMONT - MONTREAL RIVER HARBOUR - BATCHAWANA BAY. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. WIND NORTHWEST 30 KM/H GUSTING TO 50 BECOMING LIGHT EARLY THIS EVENING. WIND BECOMING NORTHWEST 20 LATE THIS EVENING. LOW MINUS 1 WITH FROST. WIND CHILL MINUS 7 THIS EVENING. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 11. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. AGAWA - LAKE SUPERIOR PARK. TONIGHT..CLEARING EARLY THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND BECOMING NORTHWEST 20 KM/H LATE THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 11. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. KAPUSKASING - HEARST - SMOOTH ROCK FALLS. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..MAINLY CLOUDY. HIGH 17. UV INDEX 5 OR MODERATE. THURSDAY NIGHT..CLEAR. LOW ZERO. FRASERDALE - PLEDGER LAKE. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 4. WIND CHILL MINUS 8 OVERNIGHT. THURSDAY..INCREASING CLOUDINESS EARLY IN THE MORNING. WIND UP TO 15 KM/H. HIGH 15. WIND CHILL MINUS 7 IN THE MORNING. UV INDEX 5 OR MODERATE. THURSDAY NIGHT..CLEARING IN THE EVENING. FOG PATCHES DEVELOPING AFTER MIDNIGHT. LOW ZERO. TIMMINS - COCHRANE - IROQUOIS FALLS. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY LATE THIS EVENING. WIND NORTHWEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..CLOUDY. WIND UP TO 15 KM/H. HIGH 15. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 5 OR MODERATE. THURSDAY NIGHT..CLEARING. LOW ZERO. LITTLE ABITIBI - KESAGAMI LAKE. TONIGHT..CLOUDY. WIND NORTHWEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..A MIX OF SUN AND CLOUD. BECOMING CLOUDY IN THE AFTERNOON. WIND UP TO 15 KM/H. HIGH 12. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEARING LATE IN THE EVENING. FOG PATCHES DEVELOPING AFTER MIDNIGHT. LOW ZERO. GREATER SUDBURY AND VICINITY. TONIGHT..CLEARING EARLY THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND NORTH 20 KM/H BECOMING LIGHT LATE THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 8 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 1 WITH PATCHY FROST. CHAPLEAU - MISSINAIBI LAKE. TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 4 WITH FROST. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEAR. LOW MINUS 1 WITH FROST. GOGAMA - FOLEYET. TONIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 4 WITH FROST. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE MORNING. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEARING IN THE EVENING. LOW MINUS 1 WITH FROST. KIRKLAND LAKE - ENGLEHART. TONIGHT..CLOUDY. CLEARING BEFORE MORNING. WIND NORTHWEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..INCREASING CLOUDINESS IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEARING IN THE EVENING. LOW ZERO WITH FROST. TEMISKAMING SHORES - TEMAGAMI. TONIGHT..PARTLY CLOUDY. WIND NORTHWEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE MORNING. HIGH 13. UV INDEX 6 OR HIGH. THURSDAY NIGHT..CLEARING LATE IN THE EVENING. LOW ZERO WITH FROST. ELLIOT LAKE - RANGER LAKE. TONIGHT..CLEARING THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND NORTHWEST 20 KM/H BECOMING LIGHT EARLY THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 1 WITH PATCHY FROST. MANITOULIN ISLAND. TONIGHT..CLEAR. WIND WEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW PLUS 2 WITH RISK OF FROST. THURSDAY..SUNNY. HIGH 10. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 2 WITH RISK OF FROST. BLIND RIVER - THESSALON. TONIGHT..CLEAR. WIND WEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 10. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 1 WITH PATCHY FROST. ESPANOLA - KILLARNEY. TONIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. WIND WEST 20 KM/H BECOMING NORTHEAST 20 LATE THIS EVENING. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 11. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 2 WITH RISK OF FROST. NORTH BAY - POWASSAN - MATTAWA. TONIGHT..MAINLY CLOUDY. CLEARING THIS EVENING. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. HIGH 14. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 2 WITH RISK OF FROST. WEST NIPISSING - FRENCH RIVER. TONIGHT..CLEARING. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. HIGH 14. UV INDEX 7 OR HIGH. THURSDAY NIGHT..CLEAR. LOW PLUS 2 WITH RISK OF FROST. END