Tornado warnings issued for parts of New Hampshire and Vermont on Thursday afternoon expired, but the potential for more severe weather continues as thunderstorms move through New England on Thursday afternoon.
Severe thunderstorm warnings were issued for parts of central and western Massachusetts, western Maine and northern New Hampshire through 3:45 p.m.
A severe thunderstorm watch is in effect for the area until 8 p.m., with wind gusts expected to reach 75 mph.
View severe weather alerts in your area here.
Thursday’s tornado warnings came after tornadoes touched down in New Hampshire and Vermont on Monday evening.
The threat of a severe thunderstorm during the afternoon and evening will spread northwest to southeast across New England, although areas south and east of a line from Boston in Providence will probably wait until evening before storms arrive.
The heat wave in New England continues. It’s not a new story, but it reaches a new impact on the body on Thursday, to dangerous levels for some. This makes hydration, breaks from outdoor activities and respites in air-conditioned places all the more important.
Heat and humidity peak Thursday, with another expected Sunday. Every day sports temperatures reach the 90s with dew point temperatures reaching oppressive values in the 70s, raising the heat index values to around 100 degrees.
The heat index is often referred to as “temperature-like”, measuring the impact on the body and representing the body’s reduced ability to cool itself in hot and humid conditions. Our body is able to cool itself by sweating, but more specifically, when the sweat evaporates, the body cools down. With abundant humidity, sweat does not easily evaporate from the body and is therefore not as effective at cooling, which means that under normal humidity conditions the temperature “might as well be” the heat index value.
For tips on how to stay safe and cool, click here.
Atmospherically, the abundant heat and humidity provide enough fuel for thunderstorms to erupt as an upper level energetic disturbance couples with a surface cold front to focus the storm’s development from the northwest. to the southeast during the afternoon and evening.
Dry air entering aloft will couple with increased high winds to promote bands of damaging wind gusts during Thursday’s thunderstorms, prompting severe thunderstorm warnings. Be prepared to take shelter if storms threaten your community. Keep in mind that lightning does not trigger severe thunderstorm warnings like wind and hail, so remembering “when thunder rolls, come inside”, helps protect people from regular thunderstorms and non-violent.
The scattered thunderstorms will slowly fade Thursday night and less humid air will arrive Friday and Saturday, but the heat persists. Although storms aren’t a common sight on Friday and Saturday, isolated storms are certainly possible just about anywhere in New England in the intense heat.
An increasing southerly wind on Sunday will bring a return of oppressive humidity, heat index values around or above 100 degrees and perhaps some scattered thunder in the afternoon or evening. More widespread showers and thunder are expected on Monday as a cold front “breaks through” the heat. We use this term with caution as temperatures will still reach 85-90 degrees for daily highs for most of next week in First Alert’s exclusive 10-day forecast!