761
WWCN11 CWTO 182030
ORANGE WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 4:30 P.M. EDT SATURDAY 18 JULY 2026.
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ORANGE LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
WINDSOR - ESSEX - CHATHAM-KENT.
ORANGE LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:
SARNIA - PETROLIA - WESTERN LAMBTON COUNTY
ELGIN
SIMCOE - DELHI - NORFOLK
DUNNVILLE - CALEDONIA - HALDIMAND
NIAGARA.
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IMPACT LEVEL: HIGH
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF DANGEROUS
THUNDERSTORMS THAT MAY BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS,
LARGE HAIL AND HEAVY RAIN.
WHAT:
WIND GUSTS UP TO 110 KM/H.
QUARTER TO PING PONG BALL SIZED HAIL.
RAINFALL AMOUNTS 25 TO 40 MM.
RISK OF TORNADOES.
WHEN:
ENDING EARLY THIS EVENING.
ADDITIONAL COMMENTS:
A COLD FRONT PUSHING THROUGH THE REGION MAY CONTINUE TO BRING
THUNDERSTORMS AS IT MOVES SOUTHEAST OVER THE AREA.
UTILITY OUTAGES ARE POSSIBLE. SIGNIFICANT DAMAGE TO PROPERTY,
BUILDINGS AND TREES IS POSSIBLE. FAST-MOVING AND RAPIDLY RISING
WATER CAN SWEEP VEHICLES AWAY AND DAMAGE INFRASTRUCTURE. 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.
FOR MORE INFORMATION:
HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.
HTTP://WEATHER.GC.CA
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