646

WWCN11 CWTO 101817

SEVERE WEATHER BULLETIN

ISSUED BY ENVIRONMENT CANADA

AT 2:17 PM EDT MONDAY 10 JULY 2006.

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WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...

TORNADO WATCH FOR:

=NEW= DUNNVILLE - CALEDONIA - HALDIMAND

=NEW= NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION.

CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF TORNADOES

ALONG THE NORTH SHORE OF LAKE ERIE UNTIL 5 PM.

THIS IS AN ALERT TO THE POTENTIAL DEVELOPMENT OF TORNADOES AND

SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS.

MONITOR WEATHER CONDITIONS..LISTEN FOR UPDATED STATEMENTS.

IF THREATENING WEATHER APPROACHES..TAKE IMMEDIATE SAFETY

PRECAUTIONS.

SEVERE THUNDERSTORM WARNING FOR:

CITY OF TORONTO

DUNNVILLE - CALEDONIA - HALDIMAND

NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION

ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION

CITY OF HAMILTON

BURLINGTON - OAKVILLE

HALTON HILLS - MILTON

MISSISSAUGA - BRAMPTON

VAUGHAN - RICHMOND HILL - MARKHAM

NEWMARKET - GEORGINA - NORTHERN YORK REGION

PICKERING - OSHAWA - SOUTHERN DURHAM REGION

UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION

COBOURG - COLBORNE - WESTERN NORTHUMBERLAND COUNTY

LINDSAY - SOUTHERN KAWARTHA LAKES

PETERBOROUGH CITY - LAKEFIELD - SOUTHERN PETERBOROUGH COUNTY.

TORRENTIAL RAIN AND HAIL WITH SLOW MOVING THUNDERSTORMS ALONG

THE NORTH SHORE OF LAKE ONTARIO. MEANWHILE A NORTH TO SOUTH

LINE OF SUPERCELL THUNDERSTORMS CROSSING THE NIAGARA PENINSULA

THIS AFTERNOON COULD PRODUCE DAMAGING WINDS AND POSSIBLY A

TORNADO. THE COLD FRONT WILL PASS EAST OF NIAGARA FALLS NEAR 3

PM.

THIS IS A WARNING THAT SEVERE THUNDERSTORMS ARE IMMINENT OR

OCCURRING IN THESE REGIONS. REMEMBER SOME SEVERE THUNDERSTORMS

PRODUCE TORNADOES..LISTEN FOR UPDATED WARNINGS.

EMERGENCY MANAGEMENT ONTARIO RECOMMENDS TAKING COVER

IMMEDIATELY WHEN THREATENING WEATHER APPROACHES.

NOTE..A SUMMARY OF ALL WARNINGS AND WATCHES FOR SOUTHERN

ONTARIO IS AVAILABLE IN THE WWCN11 CWTO BULLETIN ISSUED

IMMEDIATELY FOLLOWING THIS BULLETIN.

PLEASE REFER TO THE LATEST PUBLIC FORECASTS FOR FURTHER

DETAILS.

SEVERE THUNDERSTORM WATCH FOR:

CITY OF TORONTO

ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION

CITY OF HAMILTON

HALTON - PEEL

YORK - DURHAM

GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY

BELLEVILLE - QUINTE - NORTHUMBERLAND

LINDSAY - SOUTHERN KAWARTHA LAKES

PETERBOROUGH CITY - LAKEFIELD - SOUTHERN PETERBOROUGH COUNTY.

STRONG AND POTENTIALLY SEVERE THUNDERSTORMS THIS AFTERNOON OVER

THE NIAGARA PENINSULA. HEAVY RAINFALL THUNDERSTORMS ALONG THE

NORTH SHORE OF LAKE ONTARIO.

THIS IS AN ALERT TO THE POTENTIAL DEVELOPMENT OF SEVERE

THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS.

MONITOR WEATHER CONDITIONS..LISTEN FOR UPDATED STATEMENTS.

IF THREATENING WEATHER APPROACHES TAKE IMMEDIATE SAFETY

PRECAUTIONS.

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WATCHES/WARNINGS ENDED FOR SOUTHERN ONTARIO...

SEVERE THUNDERSTORM WATCH UPGRADED TO TORNADO WATCH FOR:

DUNNVILLE - CALEDONIA - HALDIMAND

NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION.

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==DISCUSSION==

A COLD FRONT WILL CROSS THE NIAGARA PENINSULA THIS AFTERNOON.

THE COLD FRONT WILL LIE EAST OF NIAGARA BY 5 PM.

A SPECIAL WEATHER STATEMENT FOR HEAVY RAINFALL WAS ISSUED EARLIER

THIS MORNING. A SEVERE THUNDERSTORM WARNING FOR HEAVEY RAIN HAS JUST

BEEN ISSUED FOR A SMALL PORTION OF THE AREA COVERED BY THE STATEMENT.

75 MILLIMETRES OF RAIN CAN BE EXPECTED WITHIN THE NEXT THREE AREAS AS

A LINE OF THUNDERSTORMS IS POISED TO CROSS THE WARNED REGIONS.

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR THOSE AREAS ALONG THE

NORTH SHORE OF LAKE ONTARIO TO REFLECT THE RISK FROM HEAVY RAINFALL

RESULTING FROM SLOW MOVING THUNDERSTORMS.

PLEASE REFER TO THE LATEST PUBLIC FORECASTS FOR FURTHER DETAILS.

END/CHADWICK

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