An area of low pressure, centred this morning just north of Lake Ontario and moving eastward, has prompted weather warnings across the Maritimes.
"This trough is swinging like a pendulum in our direction. Late this evening, a new centre of low pressure will develop over the Gulf of Maine within this trough. This new centre will take over and track across Nova Scotia during the day Thursday," says CBC meteorologist Peter Coade.
Weather warnings are in effect for snowfall for much of New Brunswick and parts of Prince Edward Island, with between 15 and 25 centimetres of snow expected in northern N.B. and 15 centimetres for northern Prince County, P.E.I.
Extreme southern New Brunswick and much of mainland Nova Scotia will be hit with more rain, with between 20 and 40 millimetres expected.
A freezing rain warning is also in effect for central New Brunswick.
Coade says temperatures are expected to rise again, "to above the normal for Thursday then fall back to near the norm for Friday and the upcoming weekend — the last before Christmas. Speaking of the weekend, Saturday will be mostly sunny but there are indications of another disturbance approaching from the southwest for Sunday."