WUCN11 CWTO 012010

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 4:10 P.M. EDT WEDNESDAY 1 JULY 2026.

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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

      CITY OF OTTAWA

      PRESCOTT AND RUSSELL.



YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:

      GATINEAU.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 5:53 P.M. EDT.



AT 4:09 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING STRONG WIND 

GUSTS, UP TO QUARTER SIZE HAIL AND VERY HEAVY RAIN.



THUNDERSTORM LOCATION: FROM AREAS WEST OF OTTAWA, SOUTH OF OTTAWA 

AND JUST EAST OF CLARENCE-ROCKLAND. 



MOTION: MOVING SLOWLY EASTWARD TO SOUTHEASTWARD 



HAZARDS: 

WIND: DAMAGING (90 - 110 KM/H) 

HAIL: UP TO TOONIE SIZE (UP TO 3 CM) 

RAIN: 50-100 MM LOCALLY 



DISCUSSION: 

VERY HEAVY RAIN REPORTED OTTAWA CITY AND SOUTHWARD WITH 66 

MILLIMETERS RECORD IN THE LAST 2 HOURS AT THE OTTAWA INTERNATIONAL 

AIRPORT AND THERE ARE REPORTS OF PONDING ON ROADS. 



LOCATIONS IN THE PATH: 

BARRHAVEN, MOONEYS BAY BEACH, OTTAWA, MANOTICK, BOWESVILLE, 

BEACONWOOD, SOUTH GLOUCESTER, ENNISKERRY, BLACKBURN HAMLET, GREELY, 

METCALFE, NAVAN, KENMORE, RUSSELL, VARS, MARIONVILLE, SARSFIELD, 

EMBRUN, LIMOGES, HAMMOND, CLARENCE CREEK, CLARENCE-ROCKLAND, 

BOURGET, CRYSLER, CASSELMAN



SOME TRAVEL DELAYS ARE LIKELY. DRIVING CONDITIONS WILL LIKELY BE 

DIFFICULT. LOCAL UTILITY OUTAGES ARE LIKELY. HEAVY RAIN MAY CAUSE 

FLASH FLOODING AND SIGNIFICANT REDUCTIONS TO VISIBILITY. FAST-MOVING 

AND RAPIDLY RISING WATER CAN SWEEP VEHICLES AWAY AND DAMAGE 

INFRASTRUCTURE. THERE IS A RISK OF INJURY. TAKE IMMEDIATE COVER IF A 

THUNDERSTORM APPROACHES. IF OUTSIDE, PROTECT YOURSELF FROM FLYING 

DEBRIS AND HAIL. IF YOU HEAR ROARING WIND, SEE A FUNNEL CLOUD, 

FLYING DEBRIS, OR ANY THREATENING WEATHER APPROACHING, TAKE SHELTER 

IMMEDIATELY. 



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