635
AWCN10 CWTO 201703
WEATHER SUMMARY
FOR ONTARIO AND THE NATIONAL CAPITAL REGION
ISSUED BY ENVIRONMENT CANADA
AT 1:03 P.M. EDT WEDNESDAY 20 MAY 2026.
DISCUSSION.
ONTARIO EXPERIENCED TWO DAYS OF HOT WEATHER AND DAMAGING
THUNDERSTORMS. ON MONDAY, MAY 18, THERE WERE SIGNIFICANT
THUNDERSTORMS FROM EAST OF LAKE HURON TO EAST OF GEORGIAN BAY. ON
TUESDAY, MAY 19, THERE WERE STRONG THUNDERSTORMS ACROSS CENTRAL
ONTARIO, EASTERN ONTARIO AND SOUTHWESTERN ONTARIO MAINLY SOUTH OF A
LINE FROM SARNIA TO HAMILTON. TEAMS FROM THE NORTHERN TORNADOES
PROJECT IS CURRENTLY INVESTIGATING POSSIBLE TORNADOES IN THE
MATTAWA, HUNTSVILLE, AND LONDON AREAS.
THE FOLLOWING IS A SUMMARY OF WEATHER EVENT INFORMATION RECEIVED BY
ENVIRONMENT CANADA AS OF 12:00 P.M. WEDNESDAY.
SEVERE THUNDERSTORM IMPACTS FOR MATTAWA AND HUNTSVILLE AREAS ON MAY
18:
ONE FATALITY NEAR HUNTSVILLE
INJURIES NEAR MATTAWA
POWER OUTAGES DUE TO DOWNED POWER LINES
SIGNIFICANT TREE DAMAGE INCLUDING DOWNED AND UPROOTED TREES
WIND OBSERVATIONS (KM/H) ON MAY 18:
CARIBOU ISLAND: 129.6
WINDSOR: 96.3
WIARTON: 92.6
TEMPERATURE RECORDS FOR MAY 18:
ALGONQUIN PARK (LAKE OF TWO RIVERS) AREA
HIGHEST MAXIMUM TEMPERATURE: 29.2 °C
PREVIOUS RECORD (2017): 29.1 °C
COLLINGWOOD AREA
HIGHEST MAXIMUM TEMPERATURE: 32.4 °C
PREVIOUS RECORD (2017): 30.8 °C
GODERICH AREA
HIGHEST MAXIMUM TEMPERATURE: 29.1 °C
PREVIOUS RECORD (1962): 28.3 °C
PORT COLBORNE AREA
HIGHEST MAXIMUM TEMPERATURE: 29.5 °C
PREVIOUS RECORD (1999): 28.5 °C
WELLAND AREA
HIGHEST MAXIMUM TEMPERATURE: 30.4 °C
PREVIOUS RECORD (1962): 30.0 °C
WIARTON AREA
HIGHEST MAXIMUM TEMPERATURE: 30.9 °C
PREVIOUS RECORD (2017): 27.7 °C
SEVERE THUNDERSTORM IMPACTS FOR LONDON AREA ON MAY 19:
POWER OUTAGES
SIGNIFICANT TREE DAMAGE INCLUDING DOWNED AND UPROOTED TREES
SEMI-TRUCK BLEW OVER
DAMAGE TO CARS
PLEASE NOTE THAT THIS SUMMARY MAY CONTAIN PRELIMINARY OR UNOFFICIAL
INFORMATION AND DOES NOT CONSTITUTE A COMPLETE OR FINAL REPORT.
END/OSPC
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