Frost Tonight, Warm Sunshine Returns — Weekend Rain Looms
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Clearing skies are setting the stage for a beautiful end to the work week across Newfoundland and Labrador, but first we have a very cool September night to get through.
Temperatures will fall quickly under clear skies Wednesday night, with many areas of Newfoundland dropping into the 5°C to 10°C range. Some spots in central and western Newfoundland will get even colder, including parts of the Exploits Valley, Deer Lake and the Humber Valley where temperatures could fall as low as 2°C to 4°C.
Environment and Climate Change Canada has issued a yellow-level frost advisory for Grand Falls-Windsor, Buchans and the interior, along with Deer Lake and the Humber Valley. Patchy frost is also possible outside the advisory area, particularly in low-lying parts of Green Bay-White Bay, the Northern Peninsula and portions of the interior.
There is even a small chance of very patchy frost farther east over interior sections of the Avalon and Bonavista peninsulas and along the northeast coast, although temperatures there should generally remain a little warmer.
If you still have sensitive plants outside, watering them before temperatures fall can help the soil retain some heat. Covering them or moving them indoors is an even better option where possible.
Once we get through the cold night, Thursday looks fantastic.
Sunshine will dominate across Newfoundland, with highs recovering into the upper teens and lower 20s. Labrador will also have another beautiful day under high pressure, with temperatures ranging from the upper teens into the middle 20s.
Friday looks like another very good day for much of Newfoundland, particularly eastern areas, and if you have outdoor plans, that may be the day to take advantage of.
The weather begins going downhill over the weekend.
An area of low pressure will move slowly from near Nova Scotia toward waters south and eventually east of Newfoundland between Saturday and Monday. Its exact track remains important, because a small shift north or south will have a significant impact on how much rain reaches the Island.
As things stand now, rain is expected to arrive across parts of southern and eastern Newfoundland during Saturday and continue into Sunday, potentially lingering into Monday. Central Newfoundland remains somewhat on the edge of the wetter weather, while the West Coast, Northern Peninsula and Labrador currently look considerably better.
The heaviest rain may stay offshore, but there remains a legitimate risk of significant rainfall across southern and eastern Newfoundland. If the current setup holds, some areas could receive more than 50 mm between Saturday and early Monday.
Wind will also become a factor.
The pressure difference between the low south of Newfoundland and high pressure to the north will tighten through the weekend. Winds will begin increasing around the Cabot Strait Friday night into Saturday, which could create problems for Marine Atlantic crossings.
By Saturday evening, gusts around 50 km/h are possible from St. John's through Bonavista and Gander. Winds may strengthen further Saturday night into Sunday, with gusts potentially approaching 70 km/h across parts of the Avalon, northeast coast and portions of the south coast.
Those numbers aren't extreme by Newfoundland standards, but trees still have their leaves and the ground may become increasingly wet. A prolonged period of gusty wind could therefore have a little more impact than the same wind might later in the fall.
So enjoy Thursday and Friday. Both look like very nice September days across much of the province.
After that, the Labour Day weekend remains much more uncertain — and for southern and eastern Newfoundland in particular, potentially very wet and windy.
The next forecast update will be tomorrow morning! Check back for updates!
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