Late Tuesday to Wednesday Ontario Storm Impact

Another system will be pushing into S. Ontario Tuesday night and will impact the Wednesday morning commute for many folks.

More models are now consistently showing a possible extended period of FZRA for the Orangeville/Barrie/Peterborough regions Tuesday night and into the Ottawa Valley during the Wednesday morning commute, with a few mm of ice accretion possible at this time. However, precipitation will first begin as snow Tuesday overnight in Ottawa, with the change over to freezing rain/ice pellets occurring between 7-8am. I'm seeing the potential for a quick 5-10 cm of snow to fall early on Wednesday, so be prepared and give yourselves some extra time when travelling Wednesday morning. The forecast sounding below is for the Ottawa Valley region valid for 7am Wednesday.

The deformation zone is looking to sit through the Wawa area and up through Northeastern Ontario, which will keep the heavier snow to the north of it. Amounts of 10-15 cm are expected for many of  the locals north of the deformation zone.