Saturday, September 21, 2024

Long Vermont September Warm Streak Is Over For Now, Dry Spell Is Not

A small, dying rain shower looking east from St.
Albans, Vermont on yet another unseasonably warm
September evening Friday. The state managed to
see a few scattered sprinkles for the first time in over
 a week. Dry weather with a cooling trend today
through Monday. 
We had one last day of temperatures at or above 80 on Friday in much of Vermont, and that could be the last time it's that warm until next spring. 

A cooling trend is now underway.  Summer can't last forever, you know. 

WARM RECORDS

Burlington managed a high of 80 degrees Friday, the eighth and very likely last day in a row of such temperatures. 

The National Weather Service office in South Burlington said this easily broke the record for the latest in the season we've had eight days in a row of such warmth.  

The previous record for the latest eight day streak of 80 degree temperatures was from September 4-11, 2016.

This year is now tied with 2016 as having the most days in Burlington that reached at least 80 degrees. We've had 85 of them in 2024.

The September warmth over the past eight days has only broken a few daily record highs, none of which occurred in Burlington. 

Montpelier had highs of 81 degrees for three days in a row Tuesday through Thursday, each tying the record high for those dates. 

St. Johnsbury reached 84 degrees Thursday, breaking the record high of 80 degrees that had been set in 2015.

The chances of us hitting 80 degrees again this autumn are rapidly declining, as average temperatures are crashing as we head deeper into the season. Still, an 80 is possible for a few more weeks, as the latest on on record in Burlington was on October 25, 1963.

RAIN!

It sprinkled in parts of Vermont Friday, which should be an incredibly unremarkable thing to say, but after many days without any, it was something. Friday's brief spritzes weren't exactly Storm Of The Century, but those mild raindrops amounted to Storm Of The Week.

It rained lightly for a whole three minutes here in St. Albans, Vermont in the midafternoon. as a dark cloud moved overhead. My outdoor deck was even damp for a few minutes until the sun came back out. Burlington also managed a trace of rain, the first time that's happened since September 9.

A few pinpoint showers were probably heavy enough to yield measurable rainfall, but everything was under a tenth of an inch. 

Heavy rain wasn't all that far away.  Cape Cod and other places in southeastern New England were drenched over the past couple of days with several inches of rain from a sluggish offshore storm.

Those raindrops some of us saw Friday in Vermont were mostly associated with a weak "wrong way" cold front coming in from the northeast. (You might have noticed Friday's little showers moved east to west, opposite of the way they usually move around here). 

This wrong way cold front is a harbinger of gradual changes in Vermont's weather. 

THE CHANGES

At 80 degrees, Friday was the "coldest" day in Burlington since September 12. 

Each day for the next few will be cooler than the day before. Still nice, but not summery. We had daytime temperatures in the low to mid-70s today. Expected highs will be in low 70s Sunday and Monday and 60s Tuesday and probably Wednesday.  Those cooler temperatures are still pretty close to normal for this time of year. It will just seem cool after all those toasty days we've been through. 

For now, it will stay mostly dry, as the blocky weather pattern will keep sunny high pressure nearby. Finally, mostly by later Tuesday and into Wednesday, some actual rain showers - not just sprinkles - could work their way into Vermont. 

If current forecasts pan out, I'm still not super impressed by the amounts of rain that are coming this way next week. But the overall new pattern coming in seems to favor at least the chance of showers over several days starting later Tuesday, so I guess chances are the sky faucets will finally be turned back on. 

The overall weather pattern continues to lean toward warmer than average weather most days heading into early October.  

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