Metro

Dave Epstein

Just how wet is this weekend going to be?

Lane Turner/Globe Staff

The weekend is upon us and you’re likely wondering how bad the weather is going to be.

Well, Saturday is going to be the worst of the two days, with frequent showers, downpours, and even some thunder. It may not rain the entire day, but there won’t be a lot of gaps between showers.

COD Weather

Frequent showers are likely Saturday with some embedded downpours.

The reason for the precipitation Saturday is that the humidity we all experienced this week continues to sit just to the south of New England, and it will clash with the somewhat drier air that’s over the region Friday.

A battle between air masses is taking place over New England this weekend.
COD Weather
A battle between air masses is taking place over New England this weekend.
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It’s clear that all the humidity continues to prime the atmosphere for these bouts of showers and thunderstorms. The problem for those of you that want sunshine is that the boundary between these two air masses is going to sit very close to New England, and these types of boundaries are great catalyst for little waves of low pressure to develop.

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As these mini-storms ride along the boundary, they bring showers and storms with not enought time in between to really clear out.

COD Weather

Areas without much cloudiness are represented in red. Note the breaks in the clouds forecast Sunday.

On Sunday, we should see a break in the shower activity. As I look at some of the information about sky cover on Sunday, it appears that clouds are still going to dominate, but with some breaks of sunshine, especially north of the Mass. Pike.

If you have plans that can be moved from Saturday to Sunday that you don’t want to outright cancel, that is what I would do. While there is still the chance for a shower on Sunday afternoon, it’s a much lower risk than on Saturday, when I think all of us get at least some rain.

The best weather will be across northern New England this weekend, particularly on Sunday, when I think sunshine will mix with the clouds from southern New Hampshire on into Maine.

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With all the clouds and showers on Saturday, temperatures will stay in the 70s. It will be a lot of humidity in the air so it’s not going to feel cool. Sunday will be milder with temperatures in the 70s to lower 80s, the warmest weather the further north you go where the clouds will be thinnest.

Next week looks unsettled through about Wednesday. During this time there is the chance for showers along with a lot of humidity and periods of cloudiness. What started as a pretty nice summer has quickly turned into a humid and relatively wet one for many areas. Let’s hope we can break this pattern next month and have a good fall.