Dave Sills 🌪️🎶⚓

There were several reports of possible tornadoes and photos/video of funnel clouds yesterday in the Winnipeg, MB area.

The Winnipeg NTP survey team will investigate these potential tornadoes today.

Please send damage reports to ntp@uwo.ca or submit via uwo.ca/ntp. Thanks!

#MBstorm

August 7th, 1979:

Three tornadoes struck southern Ontario. Two of the twisters at Stratford & Woodstock were rated F4, becoming the first violent tornadoes to impact the province since 1953. Two people were killed, 142 were injured, and hundreds of homes were affected.

The NTP has confirmed a tornado that occurred near Hardisty, AB on Aug 3. The tornado caused minor tree damage and was assigned an EF0 rating.

For details, go to the NTP blog: uwo.ca/.../tornado_...

#ABstorm

Thanks to @instantweather.bsky.social for the numerous reports for this event!

Will be there! And looking forward to seeing @adamskinner.bsky.social and his band 'Face the Lion' open. #Barrie #KempenFest

When he was just turfed by his constituents in the last election? That’s not part of the ‘tradition’, CBC.

Canadians 🇨🇦
Be in the know

Any reason to back away.

The world’s worst business man was never going to make a deal.
Dictator don is only looking for knee bending corruption payouts not a real trade deal.

The provided photo shows the iconic image of the 1987 Edmonton tornado, captured by photographer Steve Simon. It depicts a large, wedge-shaped funnel cloud descending from a dark storm sky, touching down over an industrial area known as Refinery Row in eastern Edmonton, Alberta. The tornado appears as a bright, contrasting formation against the blackened background, with buildings, utility poles, and structures visible in the foreground.

On July 31, 1987, an F4 (possibly an F5) tornado hit the eastern parts of Edmonton and Strathcona County.
It left 27 dead, injured 300 and caused $332 million in damages.
This is the story of Black Friday.

📸 Steve Simon

🧵 1/12

Following an NTP ground/survey, the NTP has confirmed that two downbursts occurred near Mont-Laurier, QC on July 24.

The downburst at Chute-Saint-Philippe was rated EF1 while the other at Ferme-Neuve was rated EF0.

Details are provided at the NTP blog here:

uwo.ca/ntp/blog/202...

#meteoQC

The World Court throws f-bombs — and lots of 'em With its landmark ruling, the International Court of Justice has finally offered its first opinion on questions about climate change, concluding that rich, high-polluting countries have a particular o...

Canada has been desperate for the global 'rules-based order' to remain in place, yet increasingly that order is at odds with Canada's actions (or lack of them) on climate change. This landmark ruling by the #ICJ paints Canada - and PM Carney - into a corner. www.nationalobserver.com/2025/07/28/o...

The NTP has confirmed three tornadoes that occurred in the Goderich, ON area on July 26. The first occurred over Lake Huron and was rated EF0-Default. The other two occurred over land and were assigned an EF0 rating after a damage survey was conducted. Full details: uwo.ca/ntp/blog/202... #ONstorm

Storm has weakened but still racing east, now into QC. Hard to tell how much damage the MCS caused given low population density of the affected areas. Hydro One outage map suggests some damage but perhaps winds were not as intense as expected. Will see if more reports emerge. #ONstorm #meteoQC

An intense thunderstorm system is moving rapidly E across Northern Ontario. An ECCC severe thunderstorm warning cites winds to 130 km/h. Damage has already been reported. If this system produces widespread damage over a distance of hundreds of km, it could be classified as a #derecho #ONstorm

The NTP has confirmed - following a ground/drone investigation - that a downburst caused damage rated up to EF1 at Mitchell, ON on July 24. The worst damage was to a drive shed with maximum winds estimated at 150 km/h.

Full details: uwo.ca/ntp/blog/202...

#ONstorm

FYI - the threat has passed

That cell now has low-level rotation, and heading ENE towards Mono Centre. If in the area, take shelter and monitor any EC warnings. #ONstorm

I’m still concerned that this cluster of storms heading towards Shelburne could develop rotation and possibly produce a tornado. Keep and eye out if in the area! #ONstorm

Supercell tornado appears to have come ashore off southern Lake Huron - funnel cloud with ground circulation near Blacks Point / Potters Hill in the Bayfield area. Take shelter Clinton/Blyth area. #ONstorm

www.facebook.com/share/v/19BA...

Nice back-sheared anvil on that storm well south of Sandusky, OH near Bloomville, as seen from River Canard, ON #OHwx

This was interesting as well...the underside of the updraft of the Mitchell storm had a number of these areas of rotation (anti-cyclonic here). But no prominent cyclonic rotation. Normal speed, BTW. #ONstorm

So it's not enough to avoid crossing the border - now we need to avoid getting near it?

If the details here are true, this is an international incident that needs to be promptly addressed.

Saw a few interesting things chasing the storms tonight in SW ON. But this is one I can't explain - never seen anything like it before. Photo has been processed to better show the feature of interest here. Happened so fast I couldn't tell if it was actually rotating. Was on leading edge. #ONstorm

Widespread tree damage Dublin to Mitchell and further SE. A lot of trees with rot but some healthy too. Lots of large deciduous branches down and conifers snapped. Power out in those two towns. Mitchell hardest hit it seems. Corn damage tool, from both wind and in some places from hail. #ONstorm

Typical lake-breeze front setup for a moderate to strong SW flow. Will be interesting to see how these convergence zones influence storms coming across from Michigan. Am not expecting convection initiation until those MI storms (and better mid-level moisture) begin to approach. #ONstorm

There’s #3 - hopefully that’s it for a while. GenX can’t take any more… RIP

The NTP has confirmed an EF1 tornado that occurred west of Red Deer, AB on the afternoon of July 9. Thanks to Ben Chernesky for providing drone imagery of the narrow path of tree damage.

More details at uwo.ca/ntp/blog/202...

#ABstorm

YouTube video by OzzyOsbourneVEVO Ozzy Osbourne - You Can't Kill Rock and Roll (Official Audio)

Ozzy may no longer be with us, but you can't kill rock and roll. It's here to stay... RIP

youtu.be/1tGt3yefz4M?...

Boo! But what comes out of GenAI may be better than a quarter of the reviews I’ve seen in the past several years. Discouraging is a good word for it.

What Canada could learn from the tragic consequences of the Texas flash flood Flash floods are increasing in frequency, severity and impact. The Canadian government needs to learn from the Texas tragedy and co-ordinate weather information and warning systems.

What Canada could learn from the tragic consequences of the Texas flash flood (written by Dr. Gordon McBean) theconversation.com/what-canada-...

OTD in 1995, an early morning derecho hit parts of southern Ontario, resulting in a long, wide path of continuous damage. Many thousands of trees were snapped or uprooted, power lines were cut, and cottages and barns were heavily damaged. The storm's progression on radar is shown below. 1/3 #ONstorm

To be consistent with the definition of a tornado, the vortex at the surface needs to be connected to the base of a convective cloud. So either pyroCu or pyroCb. That can be quite difficult to determine. But yes, spectacular video that will help to better understand these vortices.