Environment Canada has issued a wind chill warning for a large swath of southwestern Ontario Monday, saying falling temperatures and strong winds in the wake of a cold front "will generate wind chill values into the –30s."

The weather agency said blustery conditions would begin Monday afternoon and last into Tuesday for much of Waterloo Region, Guelph, Erin, Wellington, Mount Forest and Arthur.

Snow squall warnings had previously been in effect for Guelph, Erin, Wellington, Mount Forest and Arthur. However, they were called off Monday afternoon. 

Warnings follow "Alberta clipper"

The wind chill and snow squall warnings are the come in the wake of an "Alberta clipper" that hit southern Ontario on Sunday night, dumping two to 10 centimetres of snow on Waterloo Region and the surrounding area by Monday morning. 

This is the second major weather system to hit Waterloo Region since Friday. Ontario Provincial Police said it responded to more than 1,600 crashes on Ontario highways because of the heavy snowfall.

Bus routes cancelled, exams postponed

All school buses, taxis and special education routes in Wellesley, Wilmot and Woolwich Townships have been cancelled. School taxis and buses in North Wellington, Centre Wellington, Dufferin and the Town of Erin will not be operating Monday. 

Student Transportation Services of Waterloo Region says all schools — public, Catholic, French public and French Catholic — are open with the exception of those schools dependent on transportation. 

Exams for public and Catholic Secondary School Exams that are scheduled today will be postponed until Tuesday.