026
WWCN11 CWTO 101448
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 10:48 A.M. EDT MONDAY 10 AUGUST 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= KINGSTON - ODESSA - FRONTENAC ISLANDS
=NEW= TAMWORTH - SYDENHAM - SOUTH FRONTENAC
=NEW= BANCROFT - BON ECHO PARK
=NEW= BROCKVILLE - LEEDS AND GRENVILLE
=NEW= CITY OF OTTAWA
=NEW= GATINEAU
=NEW= PRESCOTT AND RUSSELL
=NEW= CORNWALL - MORRISBURG
=NEW= SMITHS FALLS - LANARK - SHARBOT LAKE
=NEW= HUNTSVILLE - BAYSVILLE
=NEW= HALIBURTON
=NEW= RENFREW - PEMBROKE - BARRY'S BAY
=NEW= ALGONQUIN
=NEW= SOUTH RIVER - BURK'S FALLS.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF SEVERE
THUNDERSTORMS THAT MAY BE CAPABLE OF PRODUCING STRONG WIND GUSTS,
LARGE HAIL AND HEAVY RAIN.
HAZARDS:
WIND GUSTS UP TO 90 KM/H.
QUARTER TO PING PONG BALL SIZE HAIL.
LOCALLY HEAVY RAINFALL WITH AMOUNTS UP TO 50 MM.
RISK OF A TORNADO.
TIMING:
THIS AFTERNOON INTO THIS EVENING.
ADDITIONAL INFORMATION:
THUNDERSTORMS ARE EXPECTED TO DEVELOP OR MOVE INTO THE REGION THIS
AFTERNOON AND CONTINUE TO AFFECT THE AREA INTO THIS EVENING. SOME
STORMS COULD BECOME SEVERE WITH STRONG WINDS, LARGE HAIL AND HEAVY
RAIN. CONDITIONS MAY BECOME FAVOURABLE FOR SOME STORMS TO PRODUCE
TORNADOES, BUT CONFIDENCE IN ANY TORNADO THREAT IS LOW.
LOCAL UTILITY OUTAGES ARE POSSIBLE. DAMAGE TO ROOFS, FENCES,
BRANCHES OR SOFT SHELTERS IS POSSIBLE. BE PREPARED FOR SEVERE
WEATHER. IF THREATENING WEATHER APPROACHES, TAKE COVER IN A BASEMENT
OR INTERIOR ROOM. IF OUTSIDE, PROTECT YOURSELF FROM FLYING DEBRIS
AND HAIL. WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING
KILLS AND INJURES CANADIANS EVERY YEAR. SECURE LOOSE OBJECTS.
SEVERE THUNDERSTORM WATCHES ARE ISSUED WHEN CONDITIONS ARE
FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS CAPABLE OF PRODUCING
DAMAGING HAIL, WIND OR RAIN.
EMERGENCY MANAGEMENT ONTARIO RECOMMENDS THAT YOU TAKE COVER
IMMEDIATELY IF THREATENING WEATHER APPROACHES.
PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY
ENVIRONMENT CANADA.
TO REPORT SEVERE WEATHER IN ONTARIO, SEND AN EMAIL TO
ONSTORM(AT)EC.GC.CA OR POST REPORTS ON SOCIAL MEDIA USING
(HASH)ONSTORM. TO REPORT SEVERE WEATHER IN GATINEAU, SEND AN EMAIL
TO ONSTORM(AT)EC.GC.CA OR POST REPORTS ON SOCIAL MEDIA USING
(HASH)QCSTORM.
FOR MORE INFORMATION:
HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.
HTTP://WEATHER.GC.CA
END/OSPC
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