A major winter storm is forecasted for southern Ontario, bringing with it “quite dangerous” weather conditions that could bring on a slew of school bus cancellations and school closures Thursday.

Environment Canada's weather forecast is predicting up to 15 centimetres of heavy snow and ice pellets to blanket the region.

Ahead of all the snow, Niagara’s school boards have proactively cancelled all student transportation tomorrow.

Here’s what you need to know from each school board throughout the GTHA and Niagara region. The full list of school bus cancellations will be updated as they are announced.

Toronto District School Board (TDSB) and Toronto Catholic District School Board (TCDSB)

All transportation in the TDSB and TCDSB is cancelled, while schools remain open.

York Region District School Board (YRDSB) and York Catholic District School Board (YCDSB)

The YRDSB and YCDSB have cancelled all transportation but schools remain open to students.

Durham District School Board (DDSB) and Durham Catholic District School Board (DCDSB)

All DDSB and DCDSB schools are open, but transportation is not running in any of the district's four zones Thursday.

Halton District School Board (HDSB) and Halton Catholic District School Board (HCDSB)

The HDSB and HCDSB have cancelled all transportation and closed schools Thursday.

Peel Region District School Board (PDSB) and Dufferin-Peel Catholic District School Board (DPCDSB)

The PDSB has cancelled all transportation Thursday but schools remain open.

All DPCDSB buses are cancelled today. All schools are open.

Conseil Scolaire Catholique MonAvenir (Csc MonAvenir)

Csc MonAvenir has cancelled student transportation Thursday.

Parents can keep track of individual school closures on its website.

Conseil Scolaire Viamonde (CS Viamonde)

CS Viamonde has not yet announced its plans for student transportation or schools on Thursday.

Hamilton-Wentworth District School Board (HWDSB)

All HWDSB schools and admin buildings are closed "due to inclement weather and as a result of cancelled transportation."

All remote, eLearning, childcare, and in-person learning is also cancelled.

District School Board of Niagara (DSBN) and Niagara Catholic District School Board

The DSBN cancelled all transportation in the district Wednesday evening.

Niagara Catholic announced Thursday morning all student transportation will be cancelled and schools will be closed