Code:
703
WWCN11 CWTO 041643
SEVERE WEATHER BULLETIN
ISSUED BY ENVIRONMENT CANADA
AT 12:43 PM EDT TUESDAY 4 SEPTEMBER 2012.
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WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...
SEVERE THUNDERSTORM WATCH FOR:
CITY OF TORONTO
WINDSOR - ESSEX - CHATHAM-KENT
SARNIA - LAMBTON
ELGIN
LONDON - MIDDLESEX
SIMCOE - DELHI - NORFOLK
DUNNVILLE - CALEDONIA - HALDIMAND
OXFORD - BRANT
NIAGARA
CITY OF HAMILTON
HALTON - PEEL
YORK - DURHAM
HURON - PERTH
WATERLOO - WELLINGTON
DUFFERIN - INNISFIL
BELLEVILLE - QUINTE - NORTHUMBERLAND
KINGSTON - PRINCE EDWARD
PETERBOROUGH - KAWARTHA LAKES
STIRLING - TWEED - SOUTH FRONTENAC
BANCROFT - BON ECHO PARK
BROCKVILLE - LEEDS AND GRENVILLE
SMITHS FALLS - LANARK - SHARBOT LAKE
RENFREW - PEMBROKE - BARRY'S BAY.
HEAVY DOWNPOURS POSSIBLE THIS AFTERNOON.
THIS IS AN ALERT TO THE POTENTIAL DEVELOPMENT OF SEVERE
THUNDERSTORMS WITH LARGE HAIL, DAMAGING WINDS OR HEAVY
RAINFALL..MONITOR WEATHER CONDITIONS AND LISTEN FOR UPDATED
BULLETINS.
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WATCHES/WARNINGS ENDED FOR SOUTHERN ONTARIO...
SEVERE THUNDERSTORM WARNING ENDED FOR:
CITY OF TORONTO
MISSISSAUGA - BRAMPTON
CALEDON
VAUGHAN - RICHMOND HILL - MARKHAM.
THE THUNDERSTORM WHICH TRACKED NORTHWEST OF TORONTO HAS
WEAKENED CONSIDERABLY IN THE LAST 30 MINUTES. THERE WERE
LOCALIZED REPORTS RANGING FROM 30 TO 50 MM OVER A SHORT
DURATION WITH THIS THUNDERSTORM.
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==DISCUSSION==
A SLOW MOVING COLD FRONT IS PRODUCING SHOWERS AND THUNDERSTORMS OVER
A LARGE SWATH OF SOUTHERN ONTARIO. THE AIRMASS IS QUITE UNSTABLE AND
A NUMBER OF THE MORE INTENSE THUNDERSTORMS ARE CAPABLE OF PRODUCING
HEAVY DOWNPOURS WITH RAINFALL AMOUNTS OF 50 MM IN ONE HOUR.
END/OSPC
Update: Most areas now changed to rainfall warning. We're getting LOTS of it right now.
Code:
780
WWCN11 CWTO 041842
SEVERE WEATHER BULLETIN
ISSUED BY ENVIRONMENT CANADA
AT 2:42 PM EDT TUESDAY 4 SEPTEMBER 2012.
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WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...
RAINFALL WARNING FOR:
=NEW= CITY OF TORONTO
=NEW= SARNIA - LAMBTON
=NEW= ELGIN
=NEW= LONDON - MIDDLESEX
=NEW= SIMCOE - DELHI - NORFOLK
=NEW= DUNNVILLE - CALEDONIA - HALDIMAND
=NEW= OXFORD - BRANT
=NEW= NIAGARA
=NEW= CITY OF HAMILTON
=NEW= HALTON - PEEL
=NEW= YORK - DURHAM
=NEW= HURON - PERTH
=NEW= WATERLOO - WELLINGTON
=NEW= DUFFERIN - INNISFIL
=NEW= BELLEVILLE - QUINTE - NORTHUMBERLAND
=NEW= KINGSTON - PRINCE EDWARD
=NEW= PETERBOROUGH - KAWARTHA LAKES
=NEW= STIRLING - TWEED - SOUTH FRONTENAC
=NEW= BANCROFT - BON ECHO PARK
=NEW= BROCKVILLE - LEEDS AND GRENVILLE
=NEW= PRESCOTT AND RUSSELL
=NEW= SMITHS FALLS - LANARK - SHARBOT LAKE
=NEW= RENFREW - PEMBROKE - BARRY'S BAY.
ADDITIONAL RAINFALL AMOUNTS OF 20-30 MM.
THE AREA OF THUNDERSTORMS WHICH FORMED OVER A LARGE PORTION OF
SOUTHERN ONTARIO THIS MORNING HAS FORMED INTO A GENERAL AREA OF
RAIN. RADAR INDICATES AMOUNTS OF 30 - 70 MM HAVE ALREADY FALLEN IN
SOME LOCATIONS. THESE AMOUNTS ARE CONFIRMED BY MEASUREMENTS OF 70 MM
IN MARKHAM AND 50 MM NEAR LONDON. CURRENT RADAR INDICATES A FURTHER
20-30 MM OF RAIN IS POSSIBLE BEFORE THE SYSTEM MOVES OUT OF THE
AREA TONIGHT.
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WATCHES/WARNINGS ENDED FOR SOUTHERN ONTARIO...
SEVERE THUNDERSTORM WATCH ENDED FOR:
CITY OF TORONTO
WINDSOR - ESSEX - CHATHAM-KENT
SARNIA - LAMBTON
ELGIN
LONDON - MIDDLESEX
SIMCOE - DELHI - NORFOLK
DUNNVILLE - CALEDONIA - HALDIMAND
OXFORD - BRANT
NIAGARA
CITY OF HAMILTON
HALTON - PEEL
YORK - DURHAM
HURON - PERTH
WATERLOO - WELLINGTON
DUFFERIN - INNISFIL
BELLEVILLE - QUINTE - NORTHUMBERLAND
KINGSTON - PRINCE EDWARD
PETERBOROUGH - KAWARTHA LAKES
STIRLING - TWEED - SOUTH FRONTENAC
BANCROFT - BON ECHO PARK
BROCKVILLE - LEEDS AND GRENVILLE
SMITHS FALLS - LANARK - SHARBOT LAKE
RENFREW - PEMBROKE - BARRY'S BAY.
THE POTENTIAL FOR SEVERE THUNDERSTORMS HAS NOW ENDED IN THE AREA.
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==DISCUSSION==
THUNDERSTORMS HAVE FORMED INTO A GENERAL AREA OF RAIN.
REFER TO YOUR LOCAL PUBLIC FORECAST FOR FURTHER DETAILS.
END/OSPC