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Weather Vane

Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

Relative humidity, dew point and rainfall

Meteorology 101: Warmer oceans and warmer air mean generally greater humidity

By
For our latest instalment of Meteorology 101, I lump together two summer weather events: rainfall and humidity, which each have associated advisories and warnings. Humidity, by its simplest definition, is the amount of water vapour in the air. The warmer the air, the greater the distance between air molecules and the greater the holding capacity for water vapour. Due
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

July: Cool east, warm west, dry in between

Summing up weather conditions during July

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Believe it or not, July started off hot, but only the first two days had daytime highs above 30 C. After that, Manitoba saw the development of a deep Hudson Bay upper low that meandered around for nearly two weeks, placing the eastern Prairies under a cool northerly flow. That weather pattern broke in the
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

Heat waves: sunshine and sinking air

Temperatures above 30 C have cropped up a lot this year, but what makes up an official heat wave?

By
Let’s continue our look at severe summer weather by examining heat waves. While we have seen recent hot weather, it pales in comparison to some of the extreme heat reported in other parts of our planet this July. Heat waves have enveloped large portions of the Northern Hemisphere, bringing record-breaking heat to parts of North
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

Weather: July starts with an upper-level low

The nature of these lows makes it difficult to predict how long they’ll last

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As we work our way into summer, an ugly weather term has popped up: upper-level low. The coolish, unsettled weather we’ve seen in early July has largely been the result of an upper-level low that formed over Hudson Bay. Let’s look at upper-level lows and why they become so annoying, especially in summer. Before we
Weather Vane by Daniel Bezte
Weather, Weather Vane

June was warmer than July on average

In this month's outlook, the CFS model calls for around-average temperatures and above-average precipitation

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If you remember back to May, one of the comments about what June’s weather might be like was the possibility of instant summer. That is exactly what happened across the Prairies in June. Right from the beginning of the month, it felt like we just left spring and jumped right into the middle of summer.
Weather Vane by Daniel Bezte
Weather, Weather Vane

Straight-line winds can be the worst thunderstorm threat

Meteorology 101: Not all, but nearly all such winds occur near a storm's leading edge

By
The latest world monthly temperature rankings have come out for May. Not surprisingly, it turned out to be one of the warmest Mays on record, rated third warmest by both NASA and NOAA. The European Copernicus Climate Change Service ranked May as the second-warmest, while the Japanese meteorological agency placed May as the warmest on
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

That dreaded weather phenomenon: hail

Meteorology 101: You don’t necessarily need a tall thunderstorm to produce hail stones

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Hail is probably the most feared and costly type of severe summer weather. If you’ve lived any significant amount of time on the Prairies, you have likely experienced a hailstorm. While hail can occur anywhere across North America, there are two main regions where incidence is significantly higher — the central United States and the
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

What allows thunderstorms to become severe?

Rotation allows a storm to retain warm, moist air

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A week of heat and humidity brought rounds of thunderstorms across a large portion of Saskatchewan and Manitoba, so let’s continue our discussion of thunderstorms. While there were a few severe thunderstorms during this period, we did not see a big outbreak. A few readers wondered why. Thunderstorms are formed with heat, humidity, lift and
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

A hot end to an overall cold spring

The CFS model favours above-average precipitation this summer

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The start of June is the start of meteorological summer across the Northern Hemisphere. The meteorological seasons are each three months long. Summer is June to August, fall is September to November, winter is December to February, and spring is March to May. Astronomically, summer starts on the summer solstice, which falls on June 21. Now it’s time to look
Weather Vane by Daniel Bezte
Other, Weather, Weather Vane

In summer, it’s all about the thunderstorms

Meteorology 101: Certain ingredients are needed for a thunderstorm to be watch-worthy

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It’s thunderstorm season, and though we haven’t reached that point in our weather school, let’s take a look at the topic. Summer has moved in, so weather discussion across the Prairies turn to one of two topics: drought or thunderstorms. It’s too early to talk about drought, but with heat and humidity moving back into

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