Jul 13, 2016 11:19 PM
NH1 First Alert Weather: A humid Thursday in NH with some scattered storms
NH1 Chief Meteorologist
While Thursday won`t be as warm as Wednesday, it`ll feel hot as high temperatures peak in the 80s with dewpoints approaching 70F. Heat index will feel 90-95 by the afternoon...especially if we break into some hazy afternoon sun. Lots of clouds around this morning, with even a few hit of miss scattered showers possible. With the added moisture in the air, a few brief passing downpours will be possible.
Forecast soundings support moderate instability by afternoon. While much of the afternoon will be dry and uneventful...just warm and muggy.. an approaching shortwave and prefrontal trough may produce a few storms capable of strong gusty winds. There will be a line crossing Vermont in the afternoon and reaching western New Hampshire during the late afternoon hours around 4 PM. Some storms will become strong or severe, with the best chance of those storms happening will be in Northern and Western New Hampshire where there will be greatest instability. Storms will generate heavy rainfall and will have the potential for localized flooding.
The storms will continue Thursday night but rapidly diminish after 8 PM ahead of a slow-moving cold front. Lows once again should range from the mid 60s to lower 70s Thursday night, along with patchy dense fog. The cold front will eventually push off the coast Friday, but it could take much of the day. Hazy, Hot Humid weather will remain in place Friday with highs in the upper 80's and Lwr 90's...with an offshore flow temperatures in coastal areas will likely be warmer than previous days. There is a risk of an isolated late storm, but most of the day will be perfect for swimming and staying some place cool. Once this front pushes through..somewhat drier air will follow in behind the front will lead falling humidity later in the afternoon, but much of the day could be rather uncomfortable. Scattered showers and thunderstorms are possible in mountain areas mainly during the afternoon.
Saturday and Sunday look dry across the region with temperatures not as hot in the 80's and somewhat lower humidities under partly to mostly sunny skies. It looks like a great weekend over all for all outdoor activities. Another approaching front will bring the threat of showers and thunderstorms later Monday, with drier air to follow for the midweek.