Another cold front is dropping out of Canada and is about to cross the northeast. For you, it means more clouds and spotty showers and thunderstorms starting as early as Tuesday night. Rain and isolated thunder will approach the St. Lawrence Valley before midnight and then move into northeast NY & northern Vermont by sunrise. We're not looking at severe weather overnight but a few lightning flashes and downpours can't be ruled out. The more south you are, you're dry overnight. Meanwhile, thanks to more clouds, lows in the north country won't be nearly as cool as the last few night; we'll fall into the upper 50s & low 60s.
The front will continue to sink south during the day Wednesday. Scattered showers and thunderstorms will form along it. Severe weather isn't expected but some heavy rain and lightning will accompany the strongest storms. The front will keep moving south as the day goes on bringing the best chance for showers and storms to southern Vermont & New Hampshire later in the day. Outside of any rain, highs will approach the upper 70s & low 80s.
Wednesday night, showers will linger but tend to be on the lighter side. Overnight lows will still be a bit mild thanks to stubborn clouds; most will bottom out in the upper 50s & low 60s. Cool air will keep flowing into the northeast on Thursday. Clouds will be off and on with just a lingering shower or two, especially in southern & eastern Vermont/New Hampshire. Highs will be noticeably cooler, only reaching the low 70s. It won't be overly breezy but a few gusts near 20mph are certainly possible. High pressure then settles in for Friday and Labor Day weekend providing perfectly quiet weather through early next week. Highs Friday and Saturday will struggle to get near 70°; overnight lows will be in the 40s & low 50s. Sunday and Monday will be warmer but still pleasant; highs will be near 80° under a partly to mostly sunny sky.
Aside from spotty rain and isolated thunder on Wednesday, the weather shouldn't get in the way of your Champlain Valley Fair plans. If you're staying at home over Labor Day weekend there shouldn't be any weather problems. However, if you're going to the Atlantic coast, you need to pay attention to what's happening in the tropics. As of Tuesday evening, Tropical Depression Nine is sitting in the Gulf of Mexico. It's expected to strengthen into a strong Tropical Storm and make landfall in north Florida sometime Thursday. From there, it'll move northeast and enter the Atlantic Ocean by Friday evening. It's possible that storm will maintain strength as it rides up the east coast through the weekend. The latest forecast cone from the National Hurricane Center does include parts of coastal Connecticut, Rhode Island and Massachusetts. At the very least, coastal New England will likely experience high surf and dangerous rip currents. There's plenty of uncertainty and it's worth watching.
-Meteorologist Sean Parker
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