New Brunswick

Rainfall warning issued as up to 100 mm expected in N.B.

Environment Canada has issued a rainfall warning for much of New Brunswick, advising that up to 100 mm of rain is expected in some parts of the province Thursday.

Similar weather has caused localized flooding, says Environment Canada

Two people walking in the rain in Saint John
Environment Canada is warning that parts of the province along the Fundy coast could see up to 60 millimetres of rainfall on Thursday. (Roger Cosman/CBC)

An unseasonable weather system could dump more than 100 millimetres of rain in some parts of New Brunswick Thursday, raising the risk of localized flooding and overflowing creeks and rivers, says Environment Canada.

The federal weather agency has issued rainfall warnings for large parts of central, southern and western New Brunswick, with rainfall totals reaching 60 millimetres along the Fundy coast, as well as "some indications rainfall totals could surpass 100 mm locally."

Environment Canada's advisory does not specify which parts of the province are expected to receive 100 millimetres of rain.

The weather system also brought freezing rain overnight to northern parts of the province, according to CBC meteorologist Tina Simpkin.

Those areas include Northumberland, Gloucester and Restigouche counties, with the freezing rain expected to transition to rain by early afternoon as temperatures rise, she said.

A map showing areas under a rainfall warning in New Brunswick on March 6, 2025.
Environment Canada has issued a rainfall warning for much of New Brunswick, warning of up to 100 millimetres of rain to fall in some areas. (Environment Canada)

Heavy rain along with gusty southerly winds are expected to persist into Thursday evening, even in areas outside of the rainfall warning areas, she said.

Temperatures are expected to rise to between 3 and 10 Celsius Thursday, with southerly winds blowing at 30 km/h, with gusts up to 60 km/h.

Higher gusts are expected along areas of the coast, she said.

Overnight into Friday

Rainfall is expected to lessen overnight, with temperatures dropping to between 1 and 6 Celsius, and winds reducing to 20 km/h, gusting to 50 km/h, Simpkin said.

Skies will be mainly cloudy going into Friday, with rain transitioning to snowfall starting in the west and moving east going into the afternoon.

Temperatures will drop anywhere between –4 to 0 Celsius with westerly winds of 20 km/h, gusting to 50 km/h.

Rainfall totals for Friday will be between two and five millimetres for southern parts of the province, and northern regions could see between two and five centimetres of snow.

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