ACCN10 CWTO 182020
Forecast of thunderstorm potential for the province of Ontario
Issued by Environment Canada at 4:08 PM EDT Saturday 18 May 2013.
The next statement will be issued at 4.00 AM Sunday.
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Forecast of thunderstorm potential.
Tonight..Isolated non-severe thunderstorms over northwestern
Ontario, especially near the Minnesota border. The storms may
Contain heavy downpours and hail up to 1 centimetre in diameter.
Sunday..Isolated thunderstorms are likely over Northwestern Ontario,
especially near the Minnesota border, and northeast towards Hearst,
with the possibility of hail up to 1 cm in diameter. There is a
slight risk that some of these storms may be severe with
Torrential downpours, especially near the Minnesota border.
There is also a chance of non-severe thunderstorms near Eastern Lake
Superior and over Southwestern Ontario and the Dundalk Highlands.
Monday..Isolated thunderstorms are likely over Southwestern Ontario.
There is a slight risk that some these storms may be severe with
torrential downpours, large hail, and damaging winds. Isolated
non-severe thunderstorms are likely over Northwestern Ontario
Near the Minnesota border, over Northeastern Ontario east of Lake
Superior, and over the rest of Southern Ontario.
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A thunderstorm is defined as severe if it produces one or more of the
following:
- wind gusts of 90 km/h or greater.
- hail of 2 centimetres in diameter or greater.
- rainfall amounts of 50 millimetres or greater in one hour or less.
- a tornado.
Note: this forecast is issued twice daily from May 1 to September 30.
END/OSPC
