OPP are asking drivers in northwestern Ontario to drive with weather conditions in mind, after a rash of highway accidents on Tuesday.

The Thunder Bay detachment alone dealt with half-a-dozen collisions just between 9 a.m. and noon.

On Highway 102, a westbound van whose driver tried to pass a tractor trailer unit went out of control and struck the side of the transport truck. It then left the road and ended up in the ditch.

The driver of the van was taken to the Thunder Bay Regional Health Sciences Centre with non-life-threatening injuries.

Provincial police also responded to several incidents in which vehicles went into the ditch on Highway 11-17 in Oliver-Paipoonge and Highway 11-17 east of Shabaqua.

In two other separate accidents,  vehicles struck guard rails on Highway 11-17 and Highway 61.

Highway 17 was temporarily closed Tuesday between Wawa and Batchawana because of icy conditions, but has since been re-opened.

Environment Canada reports a cooling trend will drop temperatures across the northwest, which could worsen driving conditions overnight.

The daytime highs for Thunder Bay on Wednesday are expected to be significantly lower than normal — and are predicted to remain that way for several days.