Andy Costa

A significant 3-5 day heat wave is expected for S. Ontario this week as hot and humid air pumps in under a strengthening ridge. Might have to watch for a slight risk of severe storms in some areas on Tuesday & Wednesday with any potential MCS & strong instability. #onwx #onstorm

11 mm of rainfall in NW Kingston from a classic early morning thunderstorm. More scattered showers & isolated t-storms are possible today in E. Ontario. The strongest storms could drop 20-30+ mm of rain locally and small hail. #onwx #onstorm

Tornado south of Glencoe! @weathernetwork #onstorm

SEVERE THUNDERSTORM WATCH issued for most of SW #Ontario Conditions are favorable for the development of Severe Storms this afternoon/ evening Wind gusts of 90km/hr, toonie hail. Risk of a Tornado #OnWX #ONStorm

Scattered showers & thunderstorms for S. Ontario today ahead of a weak low. Risk of isolated severe storms later this afternoon/evening in SW Ont. A few storms could produce strong gusts, hail, and heavy rainfall. #onwx #onstorm

Fiery sky tonight over Kingston's west end, from Bath/Portsmouth. #sunset #ygk

A couple of storms with nice structure and a vibrant sunset this evening north of Kingston. #onwx #onstorm

Temperatures remain a little cooler than average this weekend in S. Ontario with some pop-up showers & thunderstorms possible in the afternoons & evenings. Not much rain for most, but could get isolated amounts of 20-30+ mm, maybe small hail. #onwx #onstorm

@ChrisKnoxPhotog @EthanBolziccoWX The scud was rising and twisting under the base N of Kingston like a wall cloud trying to develop. Couldn't see any persistent lowerings or rotation, though.

@EthanBolziccoWX Too far away to tell for sure. That same line would be tornado warned east of Kingston though.

Some quick moving blustery storms blasted through Northumberland County this afternoon, including one with a suspicious looking scud cloud. Dundonald, Ontario #ONStorm #ShareYourWeather

@taasha__15 Sure, it was just a quick photo from the backyard before the storm rolled in.

@AndyBlizzard87 Hey Andy! I'm a journalist with CityNews, I'm wondering if we can use this photo with your credit in our article? Please let me know! Thanks :)

Took this photo looking north of Kingston at 2:20pm along the gust front. It seemed a little suspicious. #onwx #onstorm

Severe thunderstorm warning issued between Ottawa and Cornwall for strong gusts. These storms could produce a tornado with little to no warning. #onwx #onstorm

Seeing lots of fast-moving, ropey scud in the updrafts north of Kingston, but doesn't seem very organized yet. #onwx #onstorm

Severe thunderstorm warning in effect for the Kingston area. Strong wind gusts are possible as this storm moves down the St. Lawrence. #onwx #onstorm

Windy day along the NE lakeshores. Strong winds gusting to 80-90 km/h are possible with cold front passage late morning & early afternoon NE of Lake Erie & L. Ontario. #onwx #onstorm

Quite the soaker this morning across S. Ontario. Measuring 31 mm of rainfall in NW Kingston as of 8 am. #onwx #onstorm

A strong low pressure system moves through S. Ontario tonight into tomorrow with widespread heavy showers & embedded storms. 15-30 mm of rain likely with local amounts near 50 mm or more. Strong gusts up to 90-100 km/h possible near Lake Erie, NE of Lake Ontario. #onwx #onstorm

A few more scattered thunderstorms look possible this afternoon in E. Ontario with cold upper air. Risk of an isolated strong/severe storm near the QC border. #onwx #onstorm

@julienalla11333 Might be some nice pop-up storms later today and tomorrow.

@AndyBlizzard87 how is this storm season looking in eastern ontario

Scattered thunderstorms are firing up in SW Ontario this afternoon, capable of 70-90 km/h gusts and up to quarter size hail. #onwx #onstorm