GFM Network News


Weather school: A last look at tornadoes

The weather computer has called for 'kite-flying weather' nearly every day lately

As we move into summer across Manitoba, thunderstorms and, in particular, severe thunderstorms have begun to rear their ugly heads. This week we’ll look at tornadoes, but instead of me rambling on and giving you a technical breakdown of tornadoes — how they form, what to look for, safety, et cetera — I am going to use a series of amazing

Regions of high pressure and low pressure, by latitude and altitude.

Weather school: General atmospheric circulation

Our planet’s rotation sets up a much more complex pattern of worldwide winds

Before wrapping up our weather school look at winds and working our way into general atmospheric circulation, I figured I should try to give a quick explanation of what has been driving our recent bout of cold weather. The jet stream — a narrow band of rapidly flowing air in the upper atmosphere, which usually


If a usually cold region of the Earth’s north is experiencing very warm temperatures, such as the midsummer heat Churchill saw late last month, then some other region, such as southern Manitoba, is seeing a colder spell.

Weather school: Continuing our look at wind

Anything flowing over the Earth deflects off a straight path due to the planet’s rotation

Before forcing our way into our next weather school topic, here is a quick look at global temperatures for April. As we all know, April across central North America was not warm, but globally it was another very warm month. According to the Copernicus Climate Change Service, this April came in tied with April 2016


Instability and vorticity: The ingredients that make a tornado

Since they can’t get inside to measure, scientists aren’t completely sure how funnel clouds and tornadoes form

So far this month weather conditions have been fairly good for thunderstorms to develop with plenty of warm, humid air around. This week, we’ll continue our look at severe thunderstorms, and specifically, the most deadly part — tornadoes. What are tornadoes and how do they form? A classic definition of a tornado is a violently


Severe versus air mass thunderstorms

So far in our look at severe thunderstorms we’ve looked at the three main severe weather threats: heavy rain, hail, and wind or tornadoes. What we haven’t discussed or looked at is why do some thunderstorms become severe while others do not, and how can you tell if a thunderstorm moving towards you is going

The ingredients of a tornado

After a fairly cool spring with few if any thunderstorms, summer has started to make headway into the Prairies over the last few weeks. In some years summers come and go with only the odd thundershower and maybe one big thunderstorm, but in other years every storm that comes along seems to bring severe weather.

Wind picking up soil near Miami on May 14. Allan Dawson photo

Wind picks up speed, soils

Wind warning in effect in southern Manitoba

Winds running up to 90 km/h are picking up soil Tuesday afternoon (May 14) in southern Manitoba. Environment Canada at 3:17 p.m. on Tuesday issued a wind warning for the Morden, Winkler, Altona, Emerson and Morris areas for northwest winds gusting from 70 up to 90 km/h, in the wake of a cold front that


Is the jet stream getting stuck more often?

It’s best to hope these ‘blocking patterns’ don’t become the norm This is one of those weeks when I’m just not sure what to write about, so I thought I’d discuss some ongoing weather research that just might help us understand how we could go from a record-warm March to a record-cold April in just

Out like a lamb and in like a lamb

When we have a quiet weather pattern with no strong systems affecting our region, it can sometimes be a little tough in the late winter and early spring to figure out just what will happen in regards to the weather. While last week’s forecast wasn’t too bad, it did miss out on a lot of