Jul 22, 2015 1:18 AM
NH1 Weather Insider For Wednesday July 23, 2015
NH1 Chief Meteorologist
A cold front has swept through and swept all hot stuffy blues away! Beautiful comfortable air will be in place across the Northeast the next several days. A trough in place across the Northeast will direct a NW flow of dry air from Canada which will help to keep temperatures in the 70's and Lwr 80's and dewpoints in the 40's and 50's. Quite a treat for this time of year which can be so much hotter and more humid than it has been. The trough is not just bringing in cooler air at the surface, but also aloft. That cooler air will help to create some instability during the peak heating of the day during the afternoon hours. Plenty of morning sunshine will give way to building afternoon clouds which could make for a few spotty showers, especially in the mountains. Most of the time it will be dry Wednesday and Thursday with temperatures warmer towards SNH and the coast with a drying and warming land breeze from the NW. Cooler temps will be found from the Lakes to the mountains...with more in the way of clouds in the afternoon, and the best chance of a shower.
We will have to watch Friday for a backdoor front sliding down from Maine. This front will mark a push of cooler air coming in from the Canadian Maritimes. This front will come with increasing cloud cover Friday, and this front could trigger more widespread scattered showers during the afternoon. Behind this front winds will shift to the east for a cooler wind off the water just in time for everyone heading to the beach for the weekend. We will also have to watch for that easterly wind trapping in some low clouds on Saturday along this front. It may all make the weekend forecast a bit trick and it is something I will have to look at closer today with some new information.
Meanwhile, I do expect Saturday to be the pick of the weekend with the best chance of more significant sunshine, despite the cooler seabreeze. Highs on Saturday will be near 70 at the beach and 74-78 degrees inland. Sunday a slow moving cold front will approach. Winds will be shifting to the SW so a slightly warmer day can be expected. Clouds will increase ahead of the front. This front will likely start to trigger a few late day showers or a t'storm which could push into New Hampshire by the end of the day. rain and thunderstorms could be heavy Sunday night. The front will stall over us or just south of the state. There will be a risk of scattered showers which could fire up again close to the proximity of this front.
And while the Atlantic Hurricane season remains very quiet because of cooler ocean temperatures closer to the equator, Saharan dust off of Africa, and wind shear from a strong el'nino....we will have to watch for "in-close" developments near the US coastline for tropical storms to form. There is the potential for a tropical storm to form off the Carolinas at the the start of next week. Always something to watch out for. Being that it is Hurricane Preparedness week, it is important to have a plan. While NH is not too vulnerable to Hurricanes...our greatest storms have brought strong winds all the way inland along with inland flooding. Of course the marine community at the seacoast is the the most vulnerable being close to the water. Luckily, New Hampshire is not know for bad hurricane storm surges as those are more reserved for the south coast of New England. Still always good to be prepared, know your history, and expect the unknown...because there is still so much that can happen, which has happened before, which we just don't know about.