Good Weather News: Recent Nationwide Tornado Shortage

Shelf cloud from a severe thunderstorm over Colchester, Vermont
in June, 2017. There are some occasional storm chances
in Vermont over the next week or two, starting this evening. 

Back in April, amid some deadly tornado outbreaks in the United States, I was warning that perhaps the worst was yet to come, given that May and June are the peak tornado months in the nation.

Turns out any forecast of a bunch of tornadoes was a thankful bust. Tornado activity in the U.S. in May and June was at or near record lows.

The National Weather Service Storm Prediction Center tweeted that so far, they've only counted 50 tornadoes in June, the lowest number since 1952.

A few more tornadoes might be confirmed from June after more investigations, but the number will almost certainly be at a record low.

Only six tornado watches were issued in the U.S. during June, the least on record,  besting eight watches, the previous record low set just last year.  For May and June combined, there were only 16 tornado watches, easily breaking the record for least number of such alerts during the two months. The old record was 28 such watches in 2018.

Interestingly, one of tornado watches in May included parts of Vermont, an area we all know is decidedly not tornado alley. No tornado is known to have touched down in Vermont so far this year.

Overall, there were 4,044 reports of severe weather - thunderstorm winds, hail and tornadoes - in June, which is somewhat below the average of 4,940 for the month, according to the Storm Prediction Center.

We're past the peak of tornado season for sure, but of course tornadoes and severe weather can and do still occur in July and beyond.

If you for some reason you are a Vermonter who like severe thunderstorms, there's a very slight chance you'll be in luck later today.

A squirt of rather hot, humid air is making its way into the state today, which should prompt high temperatures in the 80s to locally around 90 degrees.

Meanwhile, a weak cold front is pressing south and southeastward from Quebec and there's a relatively fast flow of air developing overhead, coming down from the northwest.  This has the potential to help produce scattered thunderstorms, a couple of which might have strong to damaging gusty winds.

This is most likely in northern Vermont, but even there, the chances of any one place being hit by such a severe storm is on the low side. The Storm Prediction Center has northern New England and northern New York in a marginal risk zone for severe storms later today.

Marginal risk is the lowest of five alert levels for severe storms and means that there's a chance of isolated, localized severe weather.

We are getting into an interesting weather pattern that could bring us more rounds of scattered, gusty thunderstorms over the next week or more.

A dome of very hot air is setting up over the central United States and south-central Canada.

We here in Vermont will be on the eastern edge of this hot dome, which means we'll get periods of very warm, humid air.  At the same time, with the center of this "heat dome" to our west, the overall air flow will come from the northwest, riding down the front side of this high pressure ridge.

Such a northwest flow on the edge of a hot air mass, is a recipe for scattered, sometimes severe storms as little disturbances move southeastward in this airflow toward us.

It's hard to predict when or if any of these thunderstorms will develop any more than a day or two in advance. The storms also won't necessarily happen every day, and won't necessarily be all that widespread.

But while you're enjoying, or not enjoying the rather warm and sticky weather in the forecast for the next week or two, keep an eye out for thunderstorms, especially during afternoons and evenings