Apr 15, 2015 8:30 PM
NH1 Chief Meteorologist
Another sunny day in the 60's. How boring is this? Seriously, are you ready for some more interesting and more challenging weather? I didn't think so. Me either! I would love for this weather to stick around as long as it would like to...but you know that is not going to happen! So let's make the best of it while it lasts shall we?
High pressure sits over us Thursday providing for another brilliant sunny day with highs in the 60's inland. Cooler onshore winds will keep temperatures in the 50's at the beach. The high will be pulling off the coast with warmer SW wind filtering into New Hampshire. SW winds will come with increasing cloud cover Thursday night into Friday. There is a risk for a few early showers Friday morning, with a drier afternoon expected where highs will climb back into the 60's.
The weekend will get off to a mild start as well, but we will have to watch a little weak low diving in from Canada. There is the potential for this to trigger some afternoon showers Saturday. It is hard to say with confidence how significant they will be. Some of our models are keep Saturday dry with this frontal passage. When it comes to the weekend, I like to lean optimistic, so mostly dry in the 60's sounds fine by me! Still, let's keep an eye to the sky Saturday afternoon just in case the showers pan out! I think the weekend will be just fine overall. Once this weak front pushes through, another high returns from Canada with another round of slightly cooler and dry air. Mostly sunny skies in the Lwr 60's Sunday.
The main weathermaker we will have to watch is currently a huge upper low sitting in the desert SW portion of the nation. This will merge with more energy diving out of Canada to become a powerful upper low sitting over the Great Lakes to start off next week. This will create a deep trough across the eastern half of the nation and allow cooler than normal air to spill into it. It will all direct moisture and thunderstorms from the midwest and Gulf of Mexico into the Northeast as a band of soaking rains. When this rain will arrive remains in question. It does look like a heavy batch of rain, with the potential for some embedded storms and the possibility for localized street flooding. We'll see. The best chance of this rain would be later Monday into Tuesday morning the way it looks now. We will also have to watch for very chilly onshore winds which will drop our temps down into the 50's, or even 40's in worse case scenario. Remember, our water temps are near 40 degrees. If the right pattern sets up and we get a prolonged period of wet weather with east winds off the water, many times our surface temps can drop right down to the water temps..meaning 30's near 40. Not ready to go there yet!
Now that is all well and good, but with that upper low back in the pattern there will be more dips in the jetstream, less stability, a more active pattern, and yes...colder temperatures. The way it looks right now...the rest of the month of April could very well have cooler than average tempertures because of this set up. So yes, the weather will start to be less inviting very soon. Enjoy the good stuff while it lasts!
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