Severe Thunderstorm Warning for Southern Ontario

This alert expired on Jul 19, 2013 8:59 PM EDT
Environment Canada
Alert area: Picton - Sandbanks Park; Newmarket - Georgina - Northern York Region; Brockville - Prescott; Cornwall - Lancaster; Cobourg - Colborne - Western Northumberland County; Bruce Peninsula - Sauble Beach - Tobermory; Stirling - Tweed - Madoc; Westport - Charleston Lake; Uxbridge - Beaverton - Northern Durham Region; Gatineau; Gananoque - Mallorytown; Orillia - Lagoon City - Washago; Wingham - Blyth - Northern Huron County; Listowel - Milverton - Northern Perth County; Maxville - Alexandria; Midland - Coldwater - Orr Lake; Peterborough City - Lakefield - Southern Peterborough County; Innisfil - New Tecumseth - Angus; Tamworth - Sydenham - South Frontenac; Mount Forest - Arthur - Northern Wellington County; Belleville - Quinte West - Eastern Northumberland County; Merrickville-Wolford - Kemptville; Owen Sound - Blue Mountains - Northern Grey County; Barrie - Collingwood - Hillsdale; Kingston - Odessa - Frontenac Islands; Hanover - Dundalk - Southern Grey County; Plevna - Sharbot Lake - Western Lanark County; Kitchener - Cambridge - Region of Waterloo; Woodstock - Tillsonburg - Oxford County; Ottawa South - Richmond - Metcalfe; City of Toronto; London - Parkhill - Eastern Middlesex County; Shelburne - Mansfield - Northern Dufferin County; Goderich - Bluewater - Southern Huron County; Guelph - Erin - Southern Wellington County; Caledon; Morrisburg - Long Sault; Lindsay - Southern Kawartha Lakes; Sarnia - Petrolia - Western Lambton County; Vaughan - Richmond Hill - Markham; Napanee - Consecon; Smiths Falls - Perth - Eastern Lanark County; Saugeen Shores - Kincardine - Southern Bruce County; Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes; Ottawa North - Kanata - Orléans; Strathroy - Komoka - Western Middlesex County; Orangeville - Grand Valley - Southern Dufferin County; Stratford - Mitchell - Southern Perth County; Watford - Pinery Park - Eastern Lambton County; Apsley - Woodview - Northern Peterborough County; Winchester - Newington; Kaladar - Bannockburn - Bon Echo Park; Pickering - Oshawa - Southern Durham Region; Prescott and Russell; Halton Hills - Milton; Mississauga - Brampton

Posted Jul 19, 2013 4:59 PM EDT

At 4:50 EDT, meteorologists are tracking an area of severe thunderstorms extending from southern Lake Huron through Lake Simcoe and the northern GTA, and east northeastward to the southern Ottawa Valley.

These are dangerous storms. A roof has been reported blown down in the Petawawa area and trees have been blown down. Wind damage has been reported in Petawawa, Pembroke, Gravenhurst, Bracebridge, Barrie, and Coldwater.

The individual thunderstorms are moving eastward at 80 km/h while the area of thunderstorms is sinking southward at about 30 km/hr.

The thunderstorms are capable of producing damaging winds and large hail as well as the threat for a tornado. Torrential downpours are also associated. Some places could see local rainfall amounts of 50 mm in an hour.

Recommended actions

Please monitor for further updates to this alert.

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