783
WWCN11 CWTO 181842
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 2:42 P.M. EDT SATURDAY 18 JULY 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= NAPANEE - CONSECON
KINGSTON - ODESSA - FRONTENAC ISLANDS
STIRLING - TWEED - SOUTH FRONTENAC
BANCROFT - BON ECHO PARK
BROCKVILLE - LEEDS AND GRENVILLE
CITY OF OTTAWA
GATINEAU
PRESCOTT AND RUSSELL
CORNWALL - MORRISBURG
SMITHS FALLS - LANARK - SHARBOT LAKE
RENFREW - PEMBROKE - BARRY'S BAY
DEEP RIVER - WHITNEY - EASTERN ALGONQUIN PARK.
YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:
WESTERN ALGONQUIN PARK - LAKE OF TWO RIVERS.
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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.
WHAT:
WIND GUSTS UP TO 110 KM/H.
QUARTER SIZED HAIL.
RAINFALL AMOUNTS 30 TO 50 MM OVER A FEW LOCALES.
RISK OF A TORNADO.
WHEN:
THIS AFTERNOON INTO EARLY THIS EVENING.
ADDITIONAL COMMENTS:
THUNDERSTORMS ARE EXPECTED TO DEVELOP AND TRACK OVER THE AREA LATER
THIS AFTERNOON AND POSSIBLY EARLY THIS EVENING.
DRIVING CONDITIONS MAY BE DIFFICULT. LOCAL UTILITY OUTAGES ARE
POSSIBLE. DAMAGE TO ROOFS, FENCES, BRANCHES OR SOFT SHELTERS IS
POSSIBLE. 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 X USING (HASH)ONSTORM. TO
REPORT SEVERE WEATHER IN GATINEAU, SEND AN EMAIL TO
ONSTORM(AT)EC.GC.CA OR POST REPORTS ON X USING (HASH)QCSTORM.
FOR MORE INFORMATION:
HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.
HTTP://WEATHER.GC.CA
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