WWCN11 CWTO 150510
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 1:10 A.M. EDT WEDNESDAY 15 APRIL 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
      ELGIN
      LONDON - MIDDLESEX
      SIMCOE - DELHI - NORFOLK
      WOODSTOCK - TILLSONBURG - OXFORD COUNTY.

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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH

==DISCUSSION==

CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF DANGEROUS
THUNDERSTORMS THAT MAY BE CAPABLE OF PRODUCING STRONG WIND GUSTS,
LARGE HAIL AND TORRENTIAL RAIN.

HAZARDS:
UP TO 90 KM/H WIND GUSTS.
TORRENTIAL DOWNPOURS.

TIMING:
OVERNIGHT.

ADDITIONAL INFORMATION:
STRONG THUNDERSTORMS ARE EXPECTED TO PUSH EASTWARD INTO THE REGION
OVERNIGHT.

TORRENTIAL DOWNPOURS ARE EXPECTED. PLEASE SEE THE SPECIAL WEATHER
STATEMENT IN EFFECT FOR MORE DETAILS.

WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND
INJURES CANADIANS EVERY YEAR. HEAVY RAIN CAN CAUSE FLASH FLOODING
AND SIGNIFICANT REDUCTIONS TO VISIBILITY. STRONG WIND GUSTS CAN
DAMAGE TREES, BUILDINGS AND OVERTURN VEHICLES. 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

END/OSPC