Quote:
Originally Posted by Metro-One
Looks like some potential first frosts in the Maritimes today.
Super cold morning there. Fredericton dipped below freezing, Charlettetown had an hourly reading of 0.1 and even the Halifax airport was down to 2.
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There are some weather patterns there that occasionally cause really low overnight temperatures. I think one factor might be (sometimes very powerful, like Dorian) low pressure systems that track too far south/east and pull down dry, cold air from Quebec and Labrador. It's almost always perfectly clear when this happens.
This is also how you see -15 or below in the Maritimes in January. If the storm track is out in the Atlantic, Atlantic Canada gets cold weather. If it's hitting NB/Quebec, NS gets rain or warm clear conditions.
Shearwater (YAW) got down to 5.6 and Halifax Dockyard got down to 6.2, so not really a frost event in the city. The low tomorrow for YHZ is supposed to be +15.
The "perfect storm" for getting frost in NB is right around now and in most of NS it's in a couple weeks, when this cold weather pattern just brings things below 0.