Jun 21, 2016 3:32 PM
NH1 First Alert Weather: Expect a few showers, storms before weekend warmth
NH1 Chief Meteorologist
Drier comfortable air is in place, but we are watching a strong short wave which will be sliding down from Canada Wednesday with a trough in place across New England Wednesday. This wave will provide lift and cooler air aloft to provide instability to help trigger a few scattered showers and thunderstorms for mid morning into the early afternoon. Early sun will fade to building clouds with the risk of these pop up showers and storms containing some small hail and gusty winds. Late clearing with increasing sunshine by 4 or 5 pm. Highs will be a bit cooler in the 70's
The trough which brought cooler air for Wednesday will pull out of the region towards the Canadian maritimes on Thursday. But, another short wave will follow in Thursday with additional lift and instability. A wave of low pressure will be tracking south of New England. It will come with a batch of rain. There are questions just how far north that the rain will go. The steadiest rain will be in the mid-Atlantic & Southern New England. Southern New Hampshire could be clipped with a few light showers Thursday afternoon. Drier weather is likely across Northern and central New Hampshire. Parly cloudy skies with onshore winds and showers will keep temps cooler near 70-75.
Behind is warm high pressure which will slowly build into the region. Temperatures will creep up through the weekend. The warm ridging gets going on Friday with high temperatures in the Lwr-mid 80s. For Saturday and Sunday the high strengthens and high temperatures will climb to the upper 80's to near 90 Saturday. Lwr-mid 90's will be possible Sunday!
The seabreeze should set up nicely on both weekend days. This will keep temperatures along the immediate coast in the 70s and Lwr 80's while the more inland locations get the big heat. By Monday humidity increases with temperatures still in the 90s making for a very hot and sticky day. A cold front will cross through the region with scattered showers and thunderstorms possible on Tuesday. Possible Heat wave conditions....or at least close to it!