Jul 7, 2015 12:38 AM
NH1 Weather Insider: Humidity returns
Source: NH1 Chief Meteorologist
Tuesday will have a much more humid feel. Winds have shifted to the south and dewpoints have climbed into the 60's overnight. Skies will start out partly sunny for a brief time today, before clouds quickly increase and thicken by late morning. Scattered showers and a few thunderstorms will be possible during the afternoon hours. No big severe storms are expected since our upper level winds are not strong...but will have available heat and moisture in the air with highs near 80-85, and dewpoints climbing into the upper 60's and Lwr 70's by afternoon. It will just take a little lift in the atmosphere for showers to start popping. Pulse type garden variety, scattered showers are likely, but there will be the potential for a localized stronger storm to spin up which could come with some gusty winds, a brief downpour. It will be short lived. Meanwhile, the coast should have a dry day with partly sunny skies and highs in the 70's near 80. The best chance of scattered afternoon showers and storms will be mostly inland across NW. Showers may develop as early as 11 AM. While the main activity of showers will be diminishing by 6 or 7 PM as the sun get lower in the sky, a few showers or a storm may still linger across the north country. This activity will be triggered by a warm front lifting through the region. As shower activity winds down Tuesday night, clouds and humidity will linger.
A cold front will push be arriving Wednesday morning. This will come with a few more showers or thunderstorm as it slowly gets to the coast. The cold front should be offshore by the early afternoon. I expect skies to become partly sunny for the afternoon with high still warm, near 80-85...dewpoints will still be muggy in the 60's, but drier air will be following in during the afternoon. A more comfortable airmass will settle in by the end of the day with sunshine to finish our Wednesday.
The front will be stalled off the south coast of New England Thursday. A wave of low pressure will ride along this front to provide some showers to Southern New England. I think high pressure near by will be strong enough to keep those showers south of New Hampshire Thursday. It will be a cooler day in the 70's with the drier air from Canada. Winds will be shifting to the NE so it will also be cooler at the coast with Partly sunny skies.
Temperatures will quickly be on the rise for the end of the week and to kick off the start of the weekend. Friday and Saturday are looking great with sunshine and highs in the Lwr-middle 80's. Very summery and not too humid. After Saturday, there are question on how Sunday my play out. The latest information is showing a digging trough into the Great Lakes which will help to steer a series of little lows into New England for Sunday, Monday and early Tuesday. At this moment, it is looking pretty unsettled with periodic showers and thunderstorms with upper level winds taking a flow of energy right through our region. It is far away, and will likely change a bit....but it is something to watch out for in the long range.