A refrigerator is stuck in a tree at Dawson Springs, Kentucky, about 140 km west of Bowling Green, on Dec. 13, 2021. (Photo: Reuters/Jon Cherry)

What makes a tornado?

There are competing theories as to why these destructive storms develop

Reading Time: 3 minutes Though we are near the end of summer and the peak of thunderstorm season, there are still opportunities for severe weather. Let’s look at the most destructive yet awesome weather event associated with thunderstorms: tornadoes. Worldwide, Canada is second only to the United States in the number of tornadoes occurring each year, with an average […] Read more

A fallen power pole on May 24, 2022 in the Quebec municipality of Saint-Hippolyte, 45 km north of Montreal, following a derecho event which is estimated to have caused more than $750 million in damages and led to the deaths of 12 people in Quebec and southern Ontario.

Thunderstorms and straight-line winds

Under the right circumstances they can be powerful enough to cause significant damage

Reading Time: 3 minutes Let’s do a quick recap of July weather. Alberta was spared the impacts of the large Hudson Bay upper low, with continued above average temperatures experienced in June. Edmonton was the hot spot with a mean monthly temperature of 18.6 C, which was about 2.5 C above average. Calgary came in second with a temperature […] Read more


Thunderstorms are a fact of life in Alberta, but severity is due to a combination of factors.

The ingredients for a severe summer storm

Air temperature and movement determine whether it will be a storm to remember

Reading Time: 3 minutes What turns a regular thunderstorm into a severe thunderstorm, or occasionally, into a thunderstorm that you truly remember? First, there is a hot humid air mass in place, the air a few thousand feet up is very cold, providing for good lift, and there is a strong jet stream overhead to provide venting at the […] Read more



This map shows the total amount of precipitation that fell across the Prairies compared to average during the 30-day period ending on June 9. It is evident that this has been a fairly active period, with a large portion of all three Prairie provinces showing near- to above-average amounts of rainfall. The wettest regions were found in Alberta, stretching from Grande Prairie southeastwards towards Coronation and western Saskatchewan and southeastern Saskatchewan to southwestern Manitoba. Interestingly, north-central Saskatchewan was very dry during this period.

It’s that time of year when severe summer weather and tornadoes can form

Tornadoes have occurred in nearly all regions of Canada — 
here is what to look for when a severe storm is approaching

Reading Time: 3 minutes As we enter the peak season for severe weather across the Canadian Prairies, I figured now would be a good time to continue our look at severe weather and tornadoes. While Alberta doesn’t see the same number of tornadoes relative to areas to the east and south, the province is still subject to these events. Before […] Read more

Severe summer weather. Taking a look at thunderstorms and wind

Severe summer weather. Taking a look at thunderstorms and wind

Everyone knows what a funnel cloud looks like, but understanding how it forms isn’t easy

Reading Time: 3 minutes In continuing our look at severe thunderstorms, we’ll look at specifically, the most deadly part — tornadoes. What are tornadoes and how do they form? A classic definition of a tornado is a violently rotating column of air that extends from a thunderstorm to the ground, which may or may not be visible as a funnel cloud. For […] Read more


Keep watch: How to spot the warning signs of a tornado

Keep watch: How to spot the warning signs of a tornado

A dark area between the storm and the ground, a green tint to the sky, and a line of swirling clouds are all danger signs

Reading Time: 3 minutes This next topic in our look at different types of severe summer weather is severe thunderstorms, and in particular, high winds. When we think of severe thunderstorms one word that should make you worried and nervous is tornado. While tornadoes are the most destructive feature that can occur within a thunderstorm, they are fairly rare, with […] Read more

weather precipitation map

Beginning our look at severe summer weather

Knowing an alert from a watch or a warning will help keep you informed, and safe

Reading Time: 3 minutes Usually around this time of the year I start my annual look at severe summer weather, but before we dive into that topic, the global March temperatures are in and the planet has beat another record. March 2015, according to the U.S. National Oceanic and Atmospheric Administration (NOAA), was the warmest March since records began […] Read more