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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 8h

What a beautiful fall day! Risk of frost tonight before temperatures rebound for the rest of the week. First 16C day of the fall so far for the southern GTA. #ONstorm

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 30/09/2026

This is one thing I've advocated for, I'd have set it to 120 with zero tolerance above 130 but 110 is a good start. In the urban areas people seem to have yet to adjust and look all confused with people passing or getting annoyed with them. Passing left n driving right still a disaster in the GTA.

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 14/09/2026

Have you ever seen inside the legendary Ridgetown Freighter? This historic Great Lakes ship now guards the harbor, but very few get to see what remains hidden behind its steel hull. Pretty cool IMO. #RidgetownFreighter #PortCredit #MaritimeHistory #GreatLakes #Shipwreck #UrbanExploring

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 14/09/2026

The Avro Lancaster was in flying in formation with the Canadian Forces Snowbirds. This flyby marks the final Toronto performance for the Snowbirds' iconic CT-114 Tutor jets before the team transitions to their new aircraft. #Snowbirds #AvroLancaster #TorontoAirShow #CIAS #CanadianForces

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 14/09/2026

Getting caught in some hail on Sept 2nd on the east side of St. Thomas, Ontario - this was the 6th storm of the day that was part of the major severe weather outbreak - the hail was mostly 10mm in size with some quarters and dollar sized chunks, only a couple toonies thankfully! #ONstorm #ONwx

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 14/09/2026

First supercell chased on Sept 2nd approaching Avon, Ontario - this was the first storm of the day that was part of the major severe weather outbreak. For a little while it had good defined rotation. Had to keep ahead of the hail with the storm. #ONstorm #ONwx

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 14/09/2026

Squall line Sept 2nd approaching Perth South, Ontario - this was the third storm of the day that was part of the major severe weather outbreak #ONstorm #ONwx

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 02/09/2026

I'm going to bed soon, but FWIW, the 00Z HRDPS is painting a very strong storm right over Exeter at 22Z, this storm then heads east to Hamilton by about 01Z. 3K NAM is painting several discrete storms east of L. Huron at 22Z with the strongest cell near Listowel. Not bad IMO.

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 01/09/2026

I'll be prepping tonight for tomorrow's chase in Southern Ontario. Very broad area of interest is Listowel, lots of refinement tomorrow, window is 4PM to 9PM, sunset is ~7:56PM. Today I enjoyed the beach all day, the official cloudy forecast never made sense to me :-) #ONstorm

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 01/09/2026

Tomorrow is looking like an interesting day. We often have a late summer/early fall surprise and tomorrow could potentially be one of the biggest severe wx days for Southern Ontario this year. I'll be heading out for sure. #ONwx #onstorm

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 28/08/2026

Lunar eclipse. Used the 800mm canon as a telescope since it was faster than actually getting the scope. #lunareclipse #moon #eclipse #flatearth #roundmoon #imtrolling #globe #earth

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 23/08/2026

This was an interesting feature of the storm that rolled through Port Credit, very broad rotation but it was def trying a little #ONstorm

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 09/08/2026

No real storm chasing today, I was out Kingston way but there was one storm that was rotating that I caught up with near Port Britain, ON. #ONstorm

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 21/07/2026

Biscuit was born in October 2013 & came into our lives in December of that year as a rambunctious puppy. He has come on many family adventures, my solo outings and was part of the pack with our other two beagles Sasha and Henry. Biscuit passed away in our loving arms at 7:15PM and broke our hearts.

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 18/07/2026

Despite this very visible hook echo and tornado warning, Halton/Oakville/Milton/Burlington fire is very quiet. #ONstorm

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 18/07/2026

Best looking storm so far, mid level rotation on King/Exeter/Buffalo

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 18/07/2026

Cold front sagging down, instability west of the escarpment, mostly stable east of the escarpment. Storms looking very linear attm. That said, if there’s a discrete storm, then that’s the one!

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 18/07/2026

Not sure what to make of the severe risk across Srn ON, lots of outflow boundaries, random smoke and a very complicated overall picture.

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Reposted by Tom Stef 🇨🇦🇭🇷🇧🇧🌪️

Not That Rick Scott 🇨🇦 @shadowspar.bsky.social · 15/07/2026

worse than 2023 up here in the Sault. there's a dusting of fine white ash on everything outside. first time I can ever recall seeing that. 😶‍🌫️

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 15/07/2026

This is the worst smoke in seen in the GTA, it’s reducing ground visibility significantly and blotting out the sun. Car still says 29C, but it is definitely cooler than it has been. It was also still +30C last night at almost midnight. #ONstorm #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 11/07/2026

Well today worked out to be better than anticipated. Caught the only storm that was rotating and it was a nice slow easy chase from Brantford down towards Norwich. The mess from London way moving east (my storm was moving SW) crashed into the low topped supercell and it died. #ONstorm #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 10/07/2026

Currently in Brantford waiting to see what pops off today, very marginal risk BUT 1km VGP on various models was actually not terrible lol. #ONSTORM #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 10/07/2026

Today was another big wind bag of a storm, first near Campbellville with 90 km/h gusts and then a second "storm" on the actual cold front pushed into the moisture laden outflow in Toronto and generated a shelf cloud. #ONstorm #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 05/07/2026

Not weather related... I've been using the DJI Pocket 4 for a number of projects for a few months now & I'm still blown away at just how well it handles low light. The amount of latitude the 14-stop true LOG format offers allows so much low light flexibility without pushing ISO. ⬇️ ISO800 1/30th

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 05/07/2026

We had about 40mm / 1.67" of much needed rain yesterday (no storms all week) and now the Southwestern portion of the province is getting a good dousing. Rainfall warning for up to 50mm by late evening in effect for Windsor - Leamington - Essex County. #ONstorm #onwx

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Reposted by Tom Stef 🇨🇦🇭🇷🇧🇧🌪️

Alluringstorms 🇨🇦 @alluringstorms.bsky.social · 26/06/2026

Saw a big cone tornado at 5:55PM EDT earlier today out near Glencoe, ON! 👀 Sorry for the late post on BlueSky (originally posted on Twitter when it was originally going down)…!🥹😅 #onwx #onstorm @mrwx4caster.bsky.social

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Reposted by Tom Stef 🇨🇦🇭🇷🇧🇧🌪️

Dave Sills 🍁🌪️🎶⚓☮️ @davesills.ca · 26/06/2026

Had an intense storm chase today as a supercell thunderstorm moved SE across SW Ontario. Strong low-level rotation, then a tornado developed west of Glencoe. Some large hail, too. Did a preliminary damage survey then caught a double rainbow and mammatus on the way home. Full package! #ONstorm 1/2

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 04/07/2026

I went storm chasing in Southern Ontario yesterday with Biscuit. We intercepted a short-lived supercell near that produced a wall cloud and showed deviant motion. The video features narration and timelapses of the storm development and a close lightning strike. #ONstorm #ONWX youtu.be/ZU6T-ND7Wb0

youtu.be

Lake Breeze Storms & Maybe A Supercell

YouTube video by vaughanweather

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 03/07/2026

And this is the problem with using warning areas based on administrative boundaries instead of storm derivative boxes. All of Toronto is under a warning for a storm affecting the far NE corner of Scarborough. Rest of the city is sunny and clear. #ONstorm #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 03/07/2026

Today turned out to be a little more exciting than I expected. One storm in particular near Guelph took on super cellular characteristics and had a wall cloud with a tail pointing towards the precipitation and very broad rotation. Video to come tomorrow. #ONstorm #ONwx

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 02/07/2026

Here's the WRF-NAM near Moose Creek (Ottawa way) - it's cranking out a storm and on the leading outflow of that storm it is pushing the supercell comp to 19 because of the local shear it is guesstimating will occur. Just a neat oddity. #ONstorm #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 02/07/2026

Keeping an eye on today again, I don't know if anything is worth chasing per se... still too early, but there's a convergence zone from London to Toronto and the usual Lake Erie breeze. Cumulus field / moisture also expanding north. #ONstorm #ONWX

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 02/07/2026

A single storm event that cancels an airshow cannot alone be linked to climate change in any meaningful manner, especially when it occurs around mid/peak season for such storms. This is bad luck, nothing more, and attempting to frame it around climate change is disingenuous to actual climate change

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 02/07/2026

My personal weather station in Woodbridge (Vantage Pro 2 fan aspirated) hit 39.6C yesterday and my Vantage Vue hit 37.2C in Mimico. We're seeing all sorts of heat related impacts on infrastructure from trains running more slowly to sections of highway/freeway buckling. share.google/qn36iXC1nsG6...

share.google

Highway 402 buckles near Reece’s Corner as temps hit 34 C on Canada Day | The Independent

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 02/07/2026

While storm chasing today, this poor tree blew over as the gust front came in and took out power to the gas station in Arthur Ontario. The storm cluster / mcs / MESS was a big wind bag. #ONstorm #onwx

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 01/07/2026

I'm thinking about heating out today, there's a pretty good outflow boundary that has an MCS riding on it and the energy building into Southern Ontario is pretty strong with widespread 4000+ j/kg sfc cape and some pockets of 5000+ j/kg #ONstorm #ONwx

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Reposted by Tom Stef 🇨🇦🇭🇷🇧🇧🌪️

Skywide Amateur Radio Club @skywideradioclub.bsky.social · 28/06/2026

CQ CQ CQ! 📻 Field Day 2026 is in the books for the Skywide Amateur Radio Club! We operated as a 4A station on 100% battery & solar power. Great day testing gear, seeing sunspots, and logging contacts! 📡 Full recap: youtu.be/xsgBSdNfoeA #HamRadio #VE3SKY

youtu.be

CQ CQ CQ! Field Day 2026 is officially in the books!

YouTube video by Skywide Amateur Radio Club - VE3SKY & VE3SKI

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 28/06/2026

Wooo Team #Canada eeked it out in the last 5 minutes of play during extra time. Absolutely amazing shot! #Can #FIFA #WORLDCUP

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Tom Stef 🇨🇦🇭🇷🇧🇧🌪️ @vaughanweather.bsky.social · 27/06/2026

My adventure yesterday. Unfortunately I could not chase Southwestern Ontario due to work commitments and I decided to play the storms near Fergus. Just my luck, I suffered a tire blowout!!! Made the best of it and still got some amazing lightning. #ONstorm #onwx www.youtube.com/watch?v=ReiC...

youtube.com

Supercell Lightning June 25th 2026

YouTube video by vaughanweather

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