Ocean water warming despite cooling – NBC Boston


The heat and humidity have left New England, but that doesn’t mean the weather is calm!

In fact, there will be subtle but important features that will impact the weather in New England in the days to come, and a lot of that revolves around the ocean.

First, a northeast wind brings entirely new air to New England on Wednesday, with afternoon highs in the 70s to near 80 degrees and dew point temperatures, the measure of the amount of humidity in the air, dropping from the sultry 70s to a much more comfortable level in the low to mid-60s. This more comfortable air should remain, at least for the most part, for the majority of the exclusive forecast 10 days of First Alert!

The most obvious result is a shift from deep summer heat to more seasonal temperatures, ending a record period: a record 26 consecutive days of high temperatures of 80 degrees or more, a record 31 hot days and , so far this season, we’ve tied the record for most days at or above 98 degrees with five (tying 1911 and 1944). Yet amid all the heat, people on the east coast of Massachusetts and New Hampshire have been asking since July 4: why has the ocean water been so cold?

We covered this earlier in the season, but it’s once again notable because that’s about to change. Most of this season has featured a westerly wind, sweeping the softer skin of surface water from the ocean out to sea, where it sits over the Gulf of Maine. Now that the wind has shifted to blowing from the northeast it will allow some of that milder ocean water to return to shore and Wednesday morning we have already seen the buoy in Cape Cod Bay register a 5 degrees, 24- hour water temperature jump and this should be felt on our eastern beaches in the coming days. It’s a bit ironic since the air temperature drops enough for swimming pools and lakes to cool quite quickly.

Another highlight for our coasts is the third and final supermoon of the year which arrives at the end of this week, which means tide levels are high and minor coastal flooding is expected in generally vulnerable locations. along the New England coast at high tide Wednesday night, Thursday. night and Friday night. Meanwhile, the massive air change, although complete at ground level, is still underway in the sky, which is why many clouds will continue to obscure the sun in the coming days, although the afternoons in particular will feature splashes of sunshine.

Wednesday morning’s showers reduced to lingering splashes, but more showers are expected Thursday morning, especially in southeastern Massachusetts, scattered Thursday afternoon and maybe a shower or two Friday and Saturday between the sun flashes and clouds.

In fact, the next 10 days will present a pattern that will often bring a high chance of showers as the jet stream – the fast-moving river of air high in the sky – plunges south from Canada into the northeastern United States. States, causing frequent energy and temperature disruptions. close to normal for this time of year.


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