A slow moving cold front is currently moving across Ontario into southern Quebec. It will bring an end to the very warm weather of yesterday and overnight. It is currently 21C in Montreal, but only 9C in Toronto behind the front. Yesterday we saw temperatures at least 15 degrees above normal. The mercury reached 30.3C in Kemptville and 29.4C in Montreal. Other hot spots included 33C at Plattsburgh, NY and 31C in Ottawa.
The colder air is being accompanied this morning by some showers and embedded thunderstorms. The likelihood of thunder will increase the further east you are today as it has become much warmer in parts of Quebec and New England. Once the front clears we can expect more seasonable temperatures for the foreseeable future. There is a risk of some showers late Friday and Saturday.
Meanwhile in southern Alberta and Saskatchewan, a strong spring storm is producing heavy rain on the east side of the system and heavy snow along and to the north of the track. Heavy snow is expected to fall across the Cypress Hills region of both provinces with 10-20cm expected. 5-10cm is possible in the Assiniboia and Gravelbourg area and along the Montana Border. The rain and snow will be accompanied by strong northeast winds from 50-70km/h.
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