Sarnia – Lambton
London – Middlesex
Simcoe – Delhi – Norfolk
Dunnville – Caledonia – Haldimand
Huron – Perth
Dufferin – Innisfil
Grey – Bruce
Barrie – Orillia – Midland
Parry Sound – Muskoka
Burk’s Falls – Bayfield Inlet
An area of low pressure near the Michigan – Ontario border will track slowly northeastward over the next 48 hours.
Periods of rain associated with the low will affect the regions from the Bruce Peninsula to northeast of Georgian Bay through Saturday night. General rainfall amounts of 15 to 25 mm are expected this evening through Saturday with local amounts to 50 mm in isolated thunderstorm activity.
For areas near Southern Lake Huron locally heavy thunderstorms are expected early this evening with local rainfall up to 50 mm in an hour and frequent cloud to ground lightning. Local wind gusts to 70 km/h are possible as well as small hail with the early evening storms.
For areas in near Lake Erie the showers will be more scattered and the threat for local heavy rain will be confined to this evening and overnight.