local storm chaser in waterloo ON CANADA. Mathematician, learning to apply pure and applied mathematics to severe convective storms.
Waterloo, Ontario
Joined December 2017
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June 9 2026 thread photos and videos of rare 20 plus tornado warnings day in Winnipeg, near heagingley trail
#mbwx
#shareyourweather
#nature
#wxtwitter
Timothy Ponepal retweeted
May 23, 2025 near Kit Carson, CO. This supercell produced one tornado, but the structure and sunset were amazing! Another supercell off the Cheyenne ridge was more tornadic, but we chose to play further south where the dewpoint was about 3-5 degrees better. Hard to ever turn your back on the Cheyenne Ridge! Mixed emotions on the day's forecast. lol
Timothy Ponepal retweeted
A moment of silence for the NAM forecast model which is retiring tomorrow morning after 20 years.
Timothy Ponepal retweeted
LINK: youtube.com/watch?v=A4amTqLZ…
This week, several short-range weather models, including the NAM, are going away for good, to be replaced by the RRFS and REFS. In this video, we break down why NOAA is making these changes, the timeline behind how we got here, the technical specifications of these new models, and how you can adapt your forecast process to the RRFS and REFS.
Timothy Ponepal retweeted
Parkbeg, Saskatchewan, June 26, 2012. Probably my all time fav Canadian tornado!! Just stunningly beautiful! (Rated EF3)
Timothy Ponepal retweeted
When the UPS guy inadvertently stops in front of your camera to ask where the storm is so he doesn't drive into it. It was kind of cool being able to point to the supercell and say, "don't go that way my dude."
Taken on Oct 23 near Columbus, NM. #nmwx
Timothy Ponepal retweeted
Found this interesting -a strong El Niño event from the Australian perspective. Impacts are worldwide in varying degrees.
We're in the middle of a strong El Niño event – so why are we getting so much rain? Watch Senior Meteorologist Angus Hines explain.
More: ow.ly/BcxR50ZZWJa
Timothy Ponepal retweeted
Unfortunately missed the lightning but at least I was treated to one of the best sunrises I have ever seen #onstorm #onwx #wxtwitter
@CraigDunmore
@TJsupercell
@alluringstorms
Timothy Ponepal retweeted
Some in #onwx #onstorm maybe interested in this
Updated: Implementation of the Rapid Refresh Forecast System (RRFS) and RRFS Ensemble Forecast System (REFS): Effective November 3, 2026
👉shorturl.at/W5gxV
Timothy Ponepal retweeted
Finally got around to making a print shop for my shot of the Enderlin EF5. Check it out on darkroom if you want to get a print of it for yourself.
brandonpayne.darkroom.com/
Timothy Ponepal retweeted
A beautifully terrifying footage of single-vortex tornado🌪️
I genuinely believe this might be some of the most spectacular natural weather footage ever captured.. the conditions required for it to form and appear exactly like this are nothing short of incredible.
Timothy Ponepal retweeted
"NASA Mars'tan uzay görüntülerini paylaştı."
Readers added context they thought people might want to know
This is not a real image or video from the surface of Mars. Night sky in Mars is not much different from a pristine night here on earth.
The image is a composite from real NASA rover surface images with a superimposed exagerated sky petapixel.com/2025/08/22/no-…
Timothy Ponepal retweeted
Stay alert: Friday evening's storm setup in northwestern Ontario could support the development of tornadoes, particularly near the international border, including Quetico Provincial Park. #ONstorm #ONwx
ow.ly/QZAm50ZMGHL
Beautiful clouds over winnipeg
#mbstorm
#shareyourweather
#mbwx
#nature
#landscapephotography
Sept 11 2026