#OnWx
Southern Ontario right now
#aurora #northernlights #onwx
November 13, 2025 at 1:22 AM
Fall and winter will clash over southern Ontario during the next few days, bringing folks a few stormy days of weather whiplash. Be prepared for rain, thunder and snow, depending on where you are. #ONstorm #ONwx
https://ow.ly/6aok50Xs4AX
Ontario faces multi-hazards with rain, thunder and snow squalls - The Weather Network
Fall and winter will clash over southern Ontario during the next few days, bringing folks a few stormy days of weather whiplash. Be prepared for rain, thunder and snow, depending on where you are
ow.ly
November 15, 2025 at 2:03 PM
Quickly, NOAA 20 & 21 satellite views (middle of the night swath captures) NASA World view is still being stitched together. #Aurora #onwx
November 12, 2025 at 1:17 PM
About 9 cm of snow fell at the London airport overnight, but further south, some people were reporting 60 cm of snow. #ONwx https://ow.ly/sWQl50XpWnL
First snow: Here's what you need to know to get your day going - The Weather Network
Buses have been cancelled for Middlesex, Elgin counties and the Red Zone
ow.ly
November 11, 2025 at 2:30 PM
7am EST (12Z) Synoptic "Snapshot" of the weather for N. Ontario. #onwx #onstorm Added Precip. Type general accumulations till Midnight.
November 14, 2025 at 1:09 PM
...and just like that...Boom! Add the current NBM Thunder guidance (the blue green fill) 4cast for now into the next few hours. #onwx #onstorm
November 15, 2025 at 5:22 PM
...just starting to get my head space into this, latest NAM12K (afternoon run) Radar P-type from Friday 7AM thru to Monday 1AM. But looking at the data, may have a notable Freezing rain/IP/snow event in NEONT/EONT Just looking at the numbers rn. #onwx #onstorm
November 14, 2025 at 1:36 AM
Hat's off to the NBM thunder Guidance, bang on again, Storms are starting to fire off ahead of some elevated MUCAPE (fuel for storms). Current Radar loop as of 11:06 AM EST. #onwx #onstorm Plotted: Radar echo's + MUCAPE (colour fill) + isobars + SFC wind barbs + fronts
November 15, 2025 at 4:13 PM
Latest 0Z run of the HRRR48- from now till Sun. 7PM EST... busy map...messy in NE/EONT areas, possible thunder in SCONT, then snow squalls develop over the snow belts. #onwx #onstorm
November 15, 2025 at 3:56 AM
...didn't think I 'd be going this in Mid-November, lol #onwx #onstorm
November 15, 2025 at 5:58 PM
Did a quick profile check with the latest HRRR, here's a good example of the vertical temp profile needed to generate freezing rain/IP (it's a bit ruff, but I think it demonstrates it OK ). Profile is for Kirkland Lake ON. Added 4casted Radar for the same run. #onwx #onstorm
November 15, 2025 at 3:05 AM
Last post for the evening, latest WPC winter ice accretion guidance (in mm);
50 percentile (what is expected)
75 percentile (if it overachieves a bit)
Just some random spot checks. Always follow ECCC alerts and guidance on amounts. #onwx #onstorm
November 15, 2025 at 3:57 AM
Latest RAP Model run, from now till 3PM Wed. Light snow showers moving thru associated with a weak disturbance, meh. a few cm here and there. But temps look to moderate the next few days. #onwx #onstorm
November 12, 2025 at 1:38 AM
7pm EST (00Z) Synoptic "Snapshot" of the weather for N. Ontario. #onwx #onstorm
November 13, 2025 at 1:00 AM
7pm EST (00Z) Synoptic "Snapshot" of the weather for S. Ontario. #onwx #onstorm a weak disturbance will move thru in the overnight, expect some snow, ~2-5 in spots, Added latest NBM cloud 4cast for the overnight. (attached)
November 12, 2025 at 1:05 AM
The CAN GEPS ens.-mean Sig.Wx. Guidance just confirming what other models (WPC, Euro, etc.) are saying re: Freezing Rain/IP-no surprise here, they r on the same page. Current ECCC Alert as of post. Heed all ECCC alerts/guidance #onwx #onstorm Red/pink lines=Highest risk-Stay Safe!
November 14, 2025 at 10:45 PM
ya...this is kinda nut's rn. (maybe making up for summer?) #onwx #onstorm Average storm motion overall ENE at ~50 to 65 K/hr.
November 15, 2025 at 6:04 PM
Current IR/Radar loop/trend to 7:20 PM EST, deep SWONT, most favored area, with a few holes in SCONT. But last night parts of EONT around the Kingston area-had 44-55% cloud cover & they had a good Aurora display. 🎲🎲 You never truly know how this plays out. #onwx #onstorm
November 13, 2025 at 12:31 AM
7am EST (12Z) Synoptic "Snapshot" of the weather for N. Ontario. #onwx #onstorm Unsettled overall, mix of sun and cloud, more cloud, risk of a shower or wet snow-in N. spots, temps hover near the 0C mark, a bit warmer in southern regions.
November 13, 2025 at 1:08 PM
First thoughts...like the placement of Snow/FRZN Rain/IP from WPC-Similar to CAN GEPS Sig. Wx , but the Can is a bit further east -in all cases the Ottawa Valley remain the concern. As higher res. models get a hold of this,-will help identify the most affect areas #onwx #onstorm
November 14, 2025 at 2:00 AM
A good portion of southern Ontario is seeing its first snowfall of the season on Sunday, enough to cause difficult travel as roads become slippery and coated with accumulations in many areas. #ONstorm #ONwx
https://ow.ly/FzWE50Xp0Z0
Earliest accumulation of 5+ cm of snow in Toronto in 56 years - The Weather Network
A good portion of southern Ontario is seeing its first snowfall of the season on Sunday, enough to cause difficult travel as roads become slippery and coated with accumulations in many areas. Toronto has seen its earliest occurrence of 5+ cm of snowfall since Oct. 22, 1969
ow.ly
November 9, 2025 at 7:30 PM
Now this is the snow estimates from the same run (see previous post) latest HRRR18 model - snowfall 4cast out to 1PM Tues. In inches-colour scale on-top. #onwx #onstorm (1" of snow=~2.5cm)
November 11, 2025 at 2:57 AM
Buffet of fall and winter-like weather conditions this weekend in southern Ontario. Expect a mix of everything, from thunderstorms and warm temperatures to a dramatic cold front bringing significant wind and snow squalls. #ONstorm #ONwx www.theweathernetwork.com/en/news/weat...
November 15, 2025 at 2:50 PM
7am EST (12Z) Synoptic "Snapshot" of the weather for S. Ontario. #onwx #onstorm Once the Clipper moves off snow squalls set up in the snow belts and fresh colder air crosses them. Colder week ahead. ECCC alerts are out for snow squall development.
November 10, 2025 at 2:20 AM
Hot off the computational press, latest hourly HRRR run -Radar 4cast (P-type) from now till 4AM Sunday. Added the MUCAPE (shaded fill-blues/lime greens). Look at the "Lake CAPE" form (in streaks) where the lake snows begin to develop. #onwx #onstorm
November 15, 2025 at 4:52 PM