Environment Canada is warning that temperatures are expected to fall rapidly overnight.
A low-pressure system over Southern Quebec will intensify as it tracks northward tonight. A warm front associated with this low is moving northward across the province. At 3:45 p.m., the time the forecast update was issued, freezing rain was still lingering along the Bay of Chaleur but precipitation had changed to rain elsewhere accompanied by mild temperatures.
“Further rainfall amounts of 10 to 20 mm are expected this evening over the western half of the province where many rainfall totals will exceed 25 mm,” the alert stated. “Some areas near the Fundy coast may receive up to 35 millimetres of rain.
“A sharp cold front will sweep across New Brunswick tonight causing temperatures to plummet to well below freezing by Tuesday morning.
“This rapid drop in temperatures overnight will cause rain and slush from today's precipitation and from mild temperatures and snow melt to rapidly freeze, likely causing very icy conditions in many areas of the province by Tuesday morning.”