AWCN11 CWTO 212152
UPDATED WEATHER SUMMARY FOR ALL OF SOUTHERN ONTARIO AND THE
NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA
AT 5:40 PM EDT SUNDAY 21 JULY 2013.
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==WEATHER EVENT DISCUSSION==
A HOT AND HUMID AIR MASS AHEAD OF A COLD FRONT PROVIDED THE PERFECT
COMBINATION TO SET OFF SEVERE THUNDERSTORM ACTIVITY ACROSS CENTRAL
AND SOUTHERN ONTARIO FRIDAY. THE SEVERE WEATHER BECAME EXTENSIVE
DURING THE AFTERNOON AND EVENING HOURS RESULTING IN THE BIGGEST
SEVERE WEATHER OUTBREAK OF THE SEASON. AN EXCEPTIONALLY LARGE AREA
WAS AFFECTED, FROM WINDSOR TO OTTAWA AND FROM LAKE ERIE TO NORTH BAY.
FRIDAY MORNING, THUNDERSTORMS GAVE SEVERE WIND DAMAGE TO CALLANDER
(NEAR NORTH BAY) RESULTING IN THE DECLARATION OF A STATE OF
EMERGENCY FOR THE TOWN.
SEVERE THUNDERSTORMS CONTINUED TO DEVELOP EASTWARD AND SOUTHWARD. IN
THE EARLY AFTERNOON, STORMS PRODUCED A SWATH OF DAMAGE FROM
PEMBROOKE TO PETAWAWA WHERE CARS WERE FLIPPED OVER, ROOFS BLOWN
DOWN, TREES UPROOTED, STREET LIGHTS SNAPPED, AND TRAILERS
OVERTURNED. BY LATE AFTERNOON, WIND DAMAGE WAS REPORTED IN DOZENS
OF COMMUNITIES IN A BROAD SWATH FROM LAKE HURON AND GEORGIAN BAY
THROUGH TO EASTERN ONTARIO.
THE SEVERE STORMS DEVELOPED SOUTHWARD DURING THE EVENING HOURS,
CAUSING WIND DAMAGE IN THE GOLDEN HORSESHOE AND IN SOUTHWESTERN
ONTARIO. FLOODING AND DOWNED TREES WERE REPORTED IN NIAGARA
FALLS WITH RAINFALL ESTIMATED AT 75 TO 100 MM. 150 MM WAS REPORTED
TO HAVE FALLEN AT RONDEAU BAY.
2 MINOR INJURIES WERE REPORTED IN CHATHAM LATE FRIDAY EVENING WHEN A
TREE FELL ON A CAR WITH THE PEOPLE IN IT.
HUNDREDS OF THOUSANDS OF RESIDENTS WERE LEFT WITHOUT POWER FOLLOWING
THE STORMS. AS OF SUNDAY MORNING, APPROXIMATELY 50,000 HOMES
REMAINED WITHOUT POWER.
ENVIRONMENT CANADA STORM DAMAGE TEAMS HAVE INVESTIGATED DAMAGE IN
BARRIE, ORILLIA, GRAVENHURST, HAMILTON, PETAWAWA, CALLANDER AND
DUFFERIN COUNTY. THE MOST SEVERE DAMAGE WAS FOUND NEAR
HONEYWOOD, IN DUFFERN COUNTY, WHERE ESTIMATED WINDS OF 150 KM/HR
DESTROYED A CATTLE BARN AND THREW THE ROOF 300 METRES. THIS DAMAGE
RATES F1 ON THE FUJITA SCALE. EVIDENCE THUS FAR INDICATES THAT
THE STORM DAMAGE IN ONTARIO HAS BEEN DONE BY STRAIGHT LINE DOWNBURST
WINDS.
BELOW IS A LIST OF THE MOST SIGNIFICANT DAMAGE REPORTS THAT
ENVIRONMENT CANADA HAS RECEIVED AS OF 4:00 PM SUNDAY.
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TIME(LCL) LOCATION EVENT DESCRIPTION
10:50 AM CALANDER TREES DOWN AND UPROOTED, HOMES
DAMAGED, POWER OUTAGES
11:20 AM GRAVENHURST 2.5 CM HAIL
12:40 PM PETAWAWA AND ROOF DAMAGE, TRAILERS FLIPPED,
PEMBROOKE POWER OUTAGES
12:55 PM PETAWAWA PLAZA FRONT FACET OFF, WINDOWS BLOWN OUT,
ROOF CAVED IN
1:55 PM GRAVENHURST LARGE TREES DOWN, POWER LINES DOWN
2:30 PM COLDWATER TREES DOWN AND SNAPPED, POWER OUTAGES
2:45 PM GRAVENHURST CARS OVERTURNED
2:50 PM ORILLIA TREES DOWN, POWER LINES DOWN, STREET
LIGHTS SNAPPED
2:55 PM LAKE DALRYMPLE POWER LINES AND TREES DOWN
3:00 PM W OF OTTAWA ROOF DAMAGE, CROP DAMAGE, TREES DOWN
3:00 PM S OF GULL LAKE 150 TREES DOWN ON SOUTH MORRIS ISLAND
3:15 PM BARRIE FUNNEL CLOUD, TREES DOWN - CAUSED
DAMAGE TO HOMES
3:20 PM SE OF TREE DAMAGE
BRACEBRIDGE
3:20 PM BOBCAYGEON TREES UPROOTED
3:30 PM KANATA LARGE HAIL
4:00 PM N OF ARTHUR TREES DOWN
4:35 PM BARRIE BUILDING DAMAGE, TREES SNAPPED,
POWER OUTAGES
5:10 PM OTTAWA BRANCHES DOWN
5:10 PM BORDEN WIND GUST OF 96 KM/H
5:10 PM MULMAR BARN ROOF THROWN 300 METRES, BARN
DESTOYED NEAR HONEYWOOD, F1 DAMAGE,
WINDS ESTIMATED AT 150 KM/HR, F1
DAMAGE
5:15 PM NAPANEE TREES DOWN, GAS LEAKS, POWER OUTAGES
5:30 PM INNISFIL FUNNEL CLOUD, LIMBS DOWN
5:30 PM WATERLOO ARPT WIND GUST OF 119 KM/H, TREES DOWN
5:35 PM SW OF BRADFORD FUNNEL CLOUD
5:40 PM GUELPH DOZENS OF TREES SNAPPED OR UPROOTED,
HUNDREDS OF BRANCHES DOWN, DAMAGE TO
HOMES FROM FALLEN TREES OR LIMBS
5:45 PM CASSELMAN 53 MM RAIN
5:50 PM KITCHENER TREES DOWN - CAUSED DAMAGE TO HOMES,
-WATERLOO POWER OUTAGES, DAMAGE TO BUS SHELTER
5:50 PM STRATFORD TREES DOWN
5:55 PM PORT CARLING MATURE TREES DOWN, TREES SNAPPED
PORT SEVERN
5:55 PM GRAVENHURST LARGE TREES DOWN, POWER LINES DOWN
6:00 PM TORONTO PEARSON WIND GUST OF 104 KM/H
6:00 PM PARIS TREE DAMAGE, WOODEN BALCONY TORN OFF
HOUSE, CINDERBLOCK WAREHOUSE COLLAPSE
6:10 PM TORONTO TREES DOWN, INCLUDING A
HISTORIC CENTURY OLD TREE, POWER
LINES DOWN
6:30 PM HAMILTON TREES DOWN
6:45 PM STONEY CREEK TREES DOWN, TREES SNAPPED
7:05 PM HAMILTON ARPT WIND GUST OF 104 KM/H
7:10 PM ST CATHARINES TREES DOWN, 75-85 MM OF RAIN,
FLOODING
7:3O PM CHATHAM TREES DOWN, POWER LINES DOWN,
7:45 PM GRIMSBY TREES DOWN, POWER OUTAGES, 65 MM OF
RAIN
7:45 PM WATERDOWN TREES DOWN
8:20 PM CHATHAM-KENT TREES DOWN, POWER OUTAGES
8:30 PM ANCASTER TREES AND POWER LINES DOWN, SMALL
HAIL
8:45 PM NORWICH WIND GUST OF 90 KM/H, TREES DOWN
9:00 PM MULMUR BARN DAMAGE, CROP DAMAGE, ROOF
DAMAGE, POWER OUTAGES
9:10 PM HAMILTON ARPT WIND GUST OF 106 KM/H
9:20 PM MOUNT HOPE TREES DOWN, TRAMPOLINE BLOWN ONTO
ROOF, CROP DAMAGE
10:00 PM PORT COLBORNE WIND GUST OF 98 KM/H
11:00 PM PORT COLBORNE WIND GUST OF 93 KM/H, POWER OUTAGES
02:00 AM (SAT) WATERLOO ARPT WIND GUST OF 91 KM/H
REPORTS WITH EXACT TIME UNKNOWN:
ST GEORGE TREES AND HYDRO LINES DOWN
ESSEX COUNTY TREES DOWN
SIMCOE COUNTY TREES DOWN
RONDEAU BAY 150 MM RAIN
CHATHAM MINOR INJURIES TO TWO PASSENGERS OF
A CAR
WIARTON LARGE TREE UPROOTED
BLENHEIM TREES DOWN, FLOODED BASEMENTS, POWER
OUTAGES
NIAGARA FALLS 75-100 MM RAIN, FLASH FLOODING
BEAMSVILLE/ 75-85 MM RAIN, FLASH FLOODING
VINELAND
