All lanes are blocked on the southbound 400 approaching Innisfil Beach Rd.
Two lanes on the northbound 400 in the same area are also closed with emergency vehicles on scene.
Reports say at least 30 vehicles are involved.
A caller into 680 NEWS said there were clear blue skies, then all of a sudden, whiteout conditions.
TRAFFIC ALERT: Multi-vehicle collision reported SB 400 approaching Innisfil Beach Rd. – all lanes blocked. Traffic spotters say at least 10 vehicles involved. This area is already under a Snow Squall Warning. #SB400
— 680 NEWS Traffic (@680NEWStraffic) March 1, 2021
680 NEWS weather specialist, Denise Andreacchi expects the snowfall to continue, on and off throughout the day.
— 680 NEWS Weather (@680NEWSweather) March 1, 2021
@Innisfil_FIRE responding to reports of a major collision on Hwy 400 southbound just north of Innisfil Beach Rd. Drive with caution today, blowing snow is reducing visibility.
— Innisfil Fire (@Innisfil_FIRE) March 1, 2021
More to come…