There are severe weather watches issued for the Montreal area:

Metro Montréal - Laval 6:40 PM EDT Tuesday 10 June 2008
Severe thunderstorm watch for Metro Montréal - Laval continued

Weather conditions for these regions are favourable to the development of severe thunderstorms. Some of them could produce largehailstones - high winds - heavy rain and intense lightning.
Public in these regions should be on the lookout for weather conditions and listen for subsequent watches and especially forwarnings to be issued in case of severe weather.This severe watch is in effect from 06:40 PM to 08:30 PM EDT.

There have already been reports of some damage and the Champlain Bridge in Montreal has been closed as a result of seven trucks over-turning. Read more about it here.

...including tornadoes and extreme humidity (and the summer technically isn't even here yet). Read about it here.

From Environment Canada:
Stanley - Doaktown - Blackville Area6:30 PM ADT Sunday 8 June 2008Tornado warning forStanley - Doaktown - Blackville Area issued Radar indicates a very intense storm near deersdale which is moving southeast at 75 km/h. It may contain a tornado damaging winds in excess of 100 km/h and large hail. This storm is moving across the eastern portion of the above mentioned region.In addition there are other thunderstorms in the above mentioned region that may give damaging winds heavy downpours and large hail.This is a warning that severe thunderstorms with tornadoes are imminent or occurring in these regions. Monitor weather conditions. Take immediate safety precautions.Please refer to the latest public forecasts for further details.Radar indicates a very intense storm near deersdale which is moving southeast at 75 km/h. It may contain a tornado damaging winds in excess of 100 km/h and large hail. This storm is moving across the eastern portion of the above mentioned region.In addition there are other thunderstorms in the above mentioned region that may give damaging winds heavy downpours and large hail.

This map is from Environment Canada's weather warning site: click on the counties here and then read where the specific tornado watches and warnings are located. Read more about it from CBC here.

There are actually an extraordinay number of weather watches and warnings in effect as of 6pm AST on Sunday, June 8:

Severe thunderstorm warning for Brandon-Carberry-Treherne
Severe thunderstorm watch for Brandon-Carberry-Treherne
Severe thunderstorm watch for Dauphin-Roblin-Winnipegosis
Severe thunderstorm watch for Killarney-Pilot Mound-Manitou
Severe thunderstorm watch for Melita-Boissevain-Turtle Mountain Provincial Park
Severe thunderstorm watch for Minnedosa-Neepawa-Russell-Riding Mountain National Park
Severe thunderstorm watch for Ste Rose-McCreary-Alonsa-Gladstone
Severe thunderstorm watch for Virden-Souris
Severe thunderstorm watch for Campbellton and Restigouche County
Severe thunderstorm watch for Edmundston and Madawaska County
Severe thunderstorm watch for Grand Falls and Victoria County
Severe thunderstorm watch for Woodstock and Carleton County

Winter storm watch for Cape Dorset
Freezing rain warning for Clyde River
Winter storm watch for Hall Beach Region
Winter storm watch for Igloolik

Severe thunderstorm watch for City of Ottawa
Severe thunderstorm watch for Cornwall - Morrisburg
Tornado watch for Elgin
Severe thunderstorm watch for Grey - Bruce
Tornado watch for Huron - Perth
Tornado warning for London - Middlesex
Tornado watch for London - Middlesex
Tornado watch for Oxford - Brant
Severe thunderstorm watch for Prescott and Russell
Severe thunderstorm watch for Renfrew - Pembroke - Barry's Bay
Severe thunderstorm warning for Sarnia - Lambton
Tornado watch for Sarnia - Lambton
Severe thunderstorm watch for Smiths Falls - Lanark - Sharbot Lake
Tornado watch for Windsor - Essex - Chatham-Kent
Severe thunderstorm watch for Beauce
Severe thunderstorm watch for Charlevoix
Severe thunderstorm watch for Drummondville - Bois-Francs
Severe thunderstorm watch for Eastern Townships
Severe thunderstorm watch for Upper Gatineau - Lièvre-Papineau

Wind warning for Kangiqsujuaq
Severe thunderstorm watch for La Tuque
Severe thunderstorm watch for Lachute - Saint-Jerome
Severe thunderstorm watch for Lanaudière
Severe thunderstorm watch for Laurentians
Severe thunderstorm watch for Mauricie
Severe thunderstorm watch for Montmagny-L'îslet
Severe thunderstorm watch for Montreal Metropolitain-Laval
Severe thunderstorm watch for Gatineau
Severe thunderstorm watch for Pontiac
Wind warning for Quaqtaq
Severe thunderstorm watch for Québec
Severe thunderstorm watch for Réserve Faunique des Laurentides
Severe thunderstorm watch for RICHELIEU VALLEY - SAINT-HYACINTHE
Severe thunderstorm watch for Vaudreuil-Soulanges-Huntingdon

Tornado watch for Carlyle - Oxbow - Carnduff - Bienfait - Stoughton
Tornado watch for City of Regina
Tornado watch for Estevan-Weyburn-Radville-Milestone
Tornado watch for Fort Qu'Appelle-Indian Head-Lumsden-Pilot Butte
Tornado watch for Moosomin-Grenfell-Kipling-Wawota
Tornado watch for Yorkton-Melville-Esterhazy

And finally...
Rainfall warning for Kluane Lake!!

Read about it here. I'll be tracking down more information about this event adn posting it here when I learn more.

Brett Anderson posted the following maps on his accuweather blog recently. Let's see if these patterns generally hold up as we finally enter the official summer season.

The red areas are above normal temperatures, green is near normal and blue is below normal.
The neon green color indicates above-normal rainfall, the base green color indicates near-normal, while the yellow/brown color shows where he expects the summer to be drier than normal.

Environment Canada also made a summer season forecast, indicating that many regions of Canada will face an above-normally hot summer.