10pm Update: The watch for metro Montreal has expired for now. Thunderstorms continue to develop over Vermont and some may affect our region later tonight. Showers will continue overnight.
• On this anniversary of the Regina tornado of 1912, parts of Saskatchewan are under Tornado watches and warnings once again. RCMP and Environment Canada reported two tornadoes since 7pm local time one near North Battleford, and the other near Saskatoon. Radar shows explosive supercell storms moving northeast of Saskatoon at this hour.
A Severe Thunderstorm Watch is in effect for Metro Montreal and the region south to the US border. South of the border, a Severe Thunderstorm Watch is also in effect along with a Flash Flood Watch for northeast New York and Northern Vermont. A flood warning is in effect for Clinton County in New York. Radar is showing numerous showers and thunderstorms spreading north into southern Quebec. The biggest threat will be heavy rain. From between 25-75mm of rain could occur in a very short period of time tonight creating local flooding. These storms are moving towards Montreal.
An upper level low continues to produce unstable weather with showers and storms. When the sun comes out, the very humid air mass becomes even more unstable. This trend will continue into Canada Day. Montreal reached 27C today.
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