Took the current radar last frame (5:59 PM )-held it, Erased it, then added the latest hourly HRRR run radar 4casts- from 6pm to 10AM Fri. -to see where all this mess of showers & possible thunderstorms are going, the cellular looking radar blobs=showers/storms #onwx #onstorm
Yeah, the weather sucks today across most of Southern and Eastern Ontario, but the warm front coming in is very sharp and when it passes temperatures will quickly pop up into the 20s in many places. #ONstorm #ONWX
Latest short run of the HRRR (12Z):👇
-Radar 4cast (P-type) from ~now till 2AM Fri. Low risk overall for storms, but a few pop-up/embedded storms would not surprise me. Mainly rain/showers for SONT. #onwx #onstorm
How the latest EURO model thinks the next few days thru the Holiday weekend may play out for SONT. #onwx #onstorm
While I wait for the ECCC Monthly Summary for ONT-here's March 2026-"real" air temperature analysis, data taken from various weather stations is processed over a 2.5km grid thru RTMA, every 15mins-to get this👇 From Mar. 1,2026 7AM thru to April 1, 2026 ~8AM #onwx #onstorm
Some nice shots today while out chasing east of Exeter and I’ve ended up near Stratford now! 😊 #onwx #onstorm
Cold pool behind the leading edge of convection visible in the velocity data, this is common with elevated storms (blob of cold air), surface based convection would likely have the gust front along or ahead of the rainfall by this point. #ONWX
These storms crossing Lake Huron have developed entirely north of the surface warm front. They’ll attempt to become surface based once they hit SW ON where temps and dews are favourable. #ONWX
This patch of clearing is where the highest surface based severe Wx threat will be oriented. Healthy dew points and rising temps with good clearing. #onwx
Clearer skies, rising dew points and temperatures might be putting a little more energy into the boundary layer than we’d otherwise see. #ONWX
Being Southern Ontario, and the calendar still reading March, this is one hell of a thunderstorm. ⛈️ #ONstorm #ONwx
#ONStorm #ONwx 🔔⛈️ Large Hail and Isolated Tornado Risk on Tuesday for Southwestern Ontario and Golden Horseshoe With Widespread Severe Storm Threat
📅 Tuesday, March 31, 2026
⤵️ VIEW THE FULL FORECAST:
instantweatherinc.com/article/onta...
- Brennen
And just like that - POOF - the forecasted storms that have triggered the severe thunderstorm watches across Southern Ontario have started to materialize in Michigan.
#ONstorm #ONwx #weather
Updated #ONstorm risk map. A cold front arriving Tuesday evening will bring another round of thunderstorms, potentially more widespread and severe. Hazards include heavy rainfall, isolated, strong winds, and small hail. #ONwx www.theweathernetwork.com/en/news/weat...
The Grand River Conservation Authority has issued a flood watch for the entire watershed as up to 60 mm of rain could fall in the next few days. Rainfall is expected to generate significant run-off, leading to rising water levels, GRCA says. #ONstorm #ONwx
www.theweathernetwork.com/en/news/weat...
The Grand River Conservation Authority has issued a flood watch for the entire watershed as up to 60 mm of rain could fall in the next few days. #ONstorm #ONwx www.theweathernetwork.com/en/news/weat...
Agreed. #onwx here is decent now. In the early days, it did not exist.
The @nws.noaa.gov Storm Prediction Center convective outlook for Monday and a lightning potential for Tuesday evening. The lightning graphic is looking lit up. #ONstorm #ONwx
Look at those Tuesday temperatures. The next few days are forecast to bring dynamic and changing weather across southern Ontario, showcasing the volatility of spring. Warmth, rain, thunderstorms, cooldown, snow for some. #ONstorm #ONwx www.theweathernetwork.com/en/news/weat...
Warmth, heavy rainfall and a thunderstorm risk await southern Ontario early this week, along with a cooldown and even some snow for some areas. #ONstorm #ONwx www.theweathernetwork.com/en/news/weat...
I am glad to be off to other site.. I miss some of the #onwx but most people have come over.. feels like the old days here for the most part
8AM EDT (12Z) Synoptic “Snapshot” summary of
current atmospheric conditions in S. Ontario
Includes info on pressure/fronts/temps/radar/etc. A
precipitation outlook for the day until midnight & other
WX-maps as needed. Active ECCC Alerts: None at Post
#onwx #onstorm
8AM EDT (12Z) Synoptic “Snapshot” summary of
current atmospheric conditions in N. Ontario
Includes info on pressure/fronts/temps/radar/etc. A
precipitation outlook for the day until midnight & other
WX-maps as needed. Active ECCC Alerts: None at Post
#onwx #onstorm
Another shot of colder air & a weak disturbance brings scattered flurries into the first part of the weekend, things improve starting Sunday. You can see what the "solar loading" now is doing to the off lake flurries during the day-really messes with them. #onwx #onstorm
Eeeeessshhh...cold and windy (-7C at S. Sauga) at first light this AM🥶-another cold shot of air for today into the first part of the weekend, things begin to moderate on Sunday into Monday. Man...this past winter😒 ...heading into Spring🌷-hope... #onwx #onstorm
