Frost advisory issued for London, most of southwestern Ontario

Frost Advisory Sunday Night

A Freeze Warning is in effect for Ottawa and Allegan County from 10:00 p.m. Sunday evening until 9:00 a.m. Monday, May 8.

Temperatures are projected to drop to the low to mid 30s Tuesday morning, which could cause damage to tender vegetation.

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.

Sensitive outdoor plants may be damaged or destroyed if left uncovered.

Clouds, a slight breeze, urbanization or proximity to water protect many areas from a frost.




The cool weather that has been over the D.C. area for the past few days will turn downright cold on Monday night, as a Frost Advisory goes into effect for the northern and western suburbs in the early hours of Tuesday.

Meteorologist Erik Zarnitz said patchy frost is likely.

The average date of the last frost is around the beginning of May along the coast and after the middle of the month farther inland across the higher terrain.

Temperatures are expected to plunge to near or a couple degrees below the zero-degree mark in most areas under partly cloudy to mainly clear skies and diminishing winds.

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