"Smoke Bomb" Might Have Saved Vermont/Northern New England From Widespread Severe Weather

My sister in Shrewsbury, Vermont sent
me several photos of storm damage
in that town. Here's one showing a 
large uprooted tree. However, the
storms weren't as widespread as 
forecasted, likely due to the 
thick wildfire smoke in the air

 We wake up this morning to find our big storms we were supposed to get last night didn't happen to the extent everyone was worried about. 

There were some strong storms in the Northeast Kingdom during the evening. And a collection of supercell thunderstorms  swept from northwest New York through south central Vermont early this morning.  Hail up to the size of baseballs hit St. Lawrence County, New York, and a roof was blown off a house there. 

In Vermont early this morning, tree damage was reported in place like Brandon, Pittsford, Orwell and Shoreham. where several large trees were snapped off. In Shrewsbury, numerous fallen trees blocked town roads and the power was out

 Trees blew down between Springfield and Weathersfield, blocking both northbound lanes of Interstate 91.  One southbound lane was also closed. Southern New Hampshire also had some storm damage. Parts of the region had a big lightning show. 

This wasn't the big scary storm outbreak we were expecting.  That's a good thing, Far fewer of us are picking up the pieces than we feared. 

However, that things didn't get as wild as forecast is frustrating for the public.  Judging from social media, people were genuinely scared at yesterday's forecast.  A small hint of fear is good. It gets people to take precautions. But people were worked up. Then, in many cases, nothing happened, which leaves people saying, "What the hell?"

 Of course, people were told that not everyone would be hit by severe storms, it would just be a minority of us. But that gets lost in the hype. 

But still, as noted, this outbreak of severe weather fell well short of forecasts. I'm not blame the meteorologists. This was about as tough of a weather scenario to forecast as you can get.  And I'd suggest the wildfire smoke really threw a wrench into the severe weather forecasting. 

SMOKE

The science of factoring smoke and climate change into day to day forecasts needs work.

The sky was a sick yellow over St. Albans, Vermont
yesterday morning because of wildfire smoke.
The smoke made severe weather forecasting even
more challenging, and probably reduced the
number of severe storms in the region. 

As soon as we got up yesterday, we knew something was awry. There was a lot of smoke out there.  Fires burning in northern Minnesota and Ontario really smogged us in. 

We're now having another smoky summer. Climate change has encouraged more fires due to hotter weather and in many places, drier conditions. 

Since the problem is newish, I don't think the computer models handle smoke forecasts well. Especially since the amounts of smoke the fires belch out changes often and unpredictably. So sometimes we're surprised by the haze and pollution. 

It gets worse. Meteorologists and other scientists don't have a great handle on how wildfire smoke affects thunderstorm development, especially when wildfire behavior changes abruptly.  We saw that yesterday as meteorologists struggled with whether the smoke would squelch storms or not. 

During a live Facebook event last evening, National Weather Service meteorologists in South Burlington said they doubted the smoke would interfere much with storm development. Meanwhile, at NOAA's Storm Prediction Center,  NWS meteorologists issued a statement saying that while there was a very good chance of severe storm development in northern New England, widespread wildfire smoke and clouds were teaming up to inhibit storms from firing up.

This morning, responding to a question from a person on Facebook, the National Weather Service in South Burlington had a great explanation:

"The thick smoke layer was a big wildcard yesterday. Turns out, the smoke reduced instability just enough that the severe storms weren't as widespread as anticipated. Given the recency of the wildfires in southwestern Ontario  - which was the primary source of the smoke - it wasn't incorporated into the model solution very well."

In the words, the fires blew up so quickly that the computer models couldn't easily feed that information into the forecast they were spitting out. So the forecast was off.

Wildfire smoke is bad, as Captain Obvious would tell us, but it might have helped us last night by limiting storms. 

More research is needed to help us understand how wildfire smoke and thunderstorms interact. Also, we need science on how smoke affects temperature forecasts. The thickness of the smoke yesterday was unexpected, and made us cooler that we thought it would be.  The forecast high in Burlington yesterday was 97 degrees. It only made it to 88.

Smoke wasn't the only thing that created fewer storms than feared. The cold front descending from Quebec was a bit of a slowpoke, coming at us later than forecast

LOOKING AHEAD

You can tell by looking out your window that smoke is still a problem here in Vermont and a lot of other places today. An air quality alert is in effect for New York State. I imagine Vermont officials are considering it. But the bulk of the smoke is aloft.   

Some of it is down here where we breathe, so the air isn't great. It's just not as awful as it can get. Air quality was moderate across Vermont this morning, though it was flirting with "unhealthy for sensitive groups."

Northern Vermont will tend to clear out later today, but southern areas are forecast to stay socked in. Smoke will make another run at us tomorrow. 

There is a low chance of showers and weak thunderstorms today, though the Storm Prediction Center has the Northeast Kingdom in a marginal risk for severe storms. This isn't a huge threat at all, but there could be an isolated strong storm today up there. Don't hold your breath on that, though. 

Today will be warm and breezy with highs up in the 80s. 

Tomorrow

A reinforcing cold front should come through tomorrow, with a new batch of scattered showers and thunderstorms. They will be hit and miss, and the thunderstorms should be pretty much garden variety. Rainfall will be generally light, which is too bad as many of us could use a nice soaking

Wildfire smoke should make another run at us. It'll reduce air quality again. It will also make it more difficult to forecast how widespread the expected showers and storms will be. 

Friday

A nice one, as it looks now. Sunny, dry, with highs in the 70s to around 80. That will make it our coldest day since late June. I don't exactly think we'll be shivering in those temperatures, though. We still have to keep an eye on wildfire smoke. It's a little too early to figure out if that will be a factor on Friday. 

Weekend.

Looking unsettles with rain chances both days. This could change, but Sunday looks like the better of the two days. Fingers crossed, the showers might move out of Vermont early in the day Sunday to reveal increasing sunshine. The storm causing the showers will have to move just a bit faster than forecast to accomplish this, however.