A frost advisory has been issued for Waterloo Region and surrounding areas.
However, light winds and clear skies will allow temperatures to fall back into the 30s Monday night, and areas of frost will once again be likely into early Tuesday morning.
A FROST ADVISORY is in effect for all of our counties until 8:00AM Tuesday.
Frost will be most pervasive along the Interstate 81 corridor from Hagerstown to Harrisonburg.
Temperatures should slowly rise through the week, probably reaching the upper 40s on Monday, then reach the low 50s on Tuesday, the upper 50s by midweek and possibly touch 60 by the end of the week, Mitchell said. It happened as late as May 22 in 2002 and as recently as 2013 (on May 14). Temperatures are expected to dip below zero overnight causing frost to spread throughout Sunday night and into Monday morning.
Homeowners are being advised to cover sensitive plants or bring them indoors to avoid being killed if left uncovered.
In Western New York, the last frosts usually occur by April 30 near Lake.Ontario, but as late as mid-May south of the Thruway, according to the National Weather Service. And it looks like once we get beyond the Mother's Day weekend, the weather pattern will turn to a milder one.