Wednesday, September 11, 2024

Just A Couple Small Hiccups In Very Long Vermont Dry, Sunny Spell

A blue sky morning today in St. Albans, Vermont. Get
used to it, as it will last much of the month. Although
every once in awhile a few clouds or wildfire smoke
and haze could intrude. 
Vermont's long stretch of warm, fair weather is just beginning now, and all the forecasts indicate this will stick around for a long time.  

September so far in the Green Mountain State has turned out to be a little on the cool side. 

Through yesterday, the month was running about three degrees cooler than the "new normal" in Burlington. That "new normal" is warmer than decades ago, so by historical standards, the first week of the month was pretty average.

That will change. 

Starting this afternoon, temperatures will start to run warmer than average for this time of year. Those temperatures will stay above normal for probably at least the next ten days, probably more. Quite possibly through the end of the month, in fact.

Despite the cool start, September, 2024 in Vermont will go down as yet another warm one. 

If you like warm, dry weather, this will be your month. But as always, there's a few hiccups thrown in. 

Hints of Humidity

 The humidity has been incredibly comfortable the past couple days. In fact, dew points - a rough measure of how humid it feels out there - hit the rock bottom 30s on Tuesday. 

It usually starts to feel a bit sticky when the dew point reaches 60 or so. It does seem like we will have more of a humid feel to the air starting tomorrow and lasting who knows how long. An ultra-weak system from Canada might temporarily drop the humidity to comfortable levels over the weekend, but those hints of mugginess should return next week.

This won't be super oppressive. Those dew points should rise into the low to mid 60s, enough to make it feel like summer. The humidity will also keep most nights somewhat on the warm. I guess it's a little soon to take down the window air conditioner. 

Fog and Sunshine Interruptions

Despite the remarkable strength and staying power of high pressure parking itself nearly overhead for days on end, tiny little disturbance should make inroads from time to time.  You might see somewhat cloudy periods here and there. One such little thing will come through tonight and part of tomorrow, which will interrupt the sun at times. Perhaps an isolated spot could even see a couple raindrops. But that's it. 

Much more importantly, this type of calm, mostly clear high pressure is a recipe for dense morning fog, especially this time of year. 

As the nighttime air cools, warm ground and water helps moisture condense into fog, especially in the valleys. Early morning commuters will need to be careful most mornings. Probably for the rest of the month at least. 

Wildfire Smoke

Record heat in the West as greatly intensified wildfires across California, Nevada and other states. Some of that smoke aloft will drift our way, so skies could become hazy at times once again. The amount of smoke in the air will wax and wane over the coming week or two. However, most of it will be aloft, and not so much near the surface. So, knock on wood, air quality will remain OK down here where we breathe. 

Tropical Storm Shield

This big, fat, stuck high pressure over New England and southeast Canada will deflect any tropical storms,  hurricanes or former tropical storms away from us during the next couple weeks. Hurricane Francine, set to slam into the Louisiana coast this morning, will at first head northeastward once it comes inland.

Often, that would eventually mean a good rainstorm for us. In this case, though, the remnants of Francine will smack into the high pressure and get trapped in or near Arkansas and die. No problem for us. 

There are some signs some sort of subtropical storm or tropical storm might form off the Southeast coast next week.  Some forecasts have it heading inland into the Carolinas.  Again, though, early indications are the high pressure will hold firm, keeping that potential system away from us. 

So bottom line, enjoy!

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