Quote:
Originally Posted by Nicko999
I am surprised Winnipeg is under a "heat warning" for low between 17-20.
Montreal would need to under a heat warning the whole months of July and August then. We've been above 18C since July 2nd. That is 10 straight lows and counting.
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Quebec is odd, they're the only place in Canada where heat warning criteria does not include overnight temperatures. I think it may have something to do with it being based on the provincial INSPQ system over anything that Environment Canada had implemented.
QC heat warning criteria is at least 1 hour of either 40 degree air temperature, or 30 degree air temperature and 40 humidex.
Everywhere else is a combination of daily highs exceeding a temperature AND overnight lows exceeding a temperature, OR a maximum humidex value (humidex is excluded from some warning criteria in BC).