Canada's Extreme Dew Points & Expanding Heat Dome 7-11-26

Canada's Extreme Dew Points & Expanding Heat Dome 7-11-26

July 9, 2026 · 9 min

About this episode

The episode discusses the unprecedented heat situation in southern Canada and the upper Midwest, focusing on extreme dew points and the expanding heat dome.

Canada's Extreme Dew Points & Expanding Heat Dome 00:00-01:02: Introduction to an unprecedented and serious heat situation developing in southern Canada and the upper Midwest, featuring world-record dew points in the 80s, comparable only to the Persian Gulf. 01:02-02:06: Emphasis on Canadian dew points peaking in the 80s, highlighting the shock value on wet bulb globe temperature maps, particularly for Winnipeg, Manitoba. 02:06-03:10: Further details on Winnipeg's dew points reaching the low 80s, along with a mention of slow internet preventing full map display but reiterating extremely high dew points and temperatures. 03:10-04:15: Discussion of extreme heat in terms of pure temperature, with Montana and North Dakota reaching 108°F and 107°F, and the redeveloping, stronger, and more northern heat dome. 04:15-05:18: The heat dome's expansion into Canada (600 decameter), questioning lower forecasts by other meteorologists, and explaining how high humidity (dew points) will make heat indexes much higher. 05:18-06:21: Environmental Canada's humidex warnings for Winnipeg, forecasting 45°C (113°F) or higher, indicating that southern Canada will experience the overall hottest…

People in this episode

Host: Simcha Lefton

Topics covered

Keywords

Mentioned in this episode

Organizations: Environmental Canada

Places: Canada, Winnipeg, Montana, North Dakota, Persian Gulf

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