BOSTON (CBS) – Just as we are picking all the pumpkin in the air with the feeling of autumn on Tuesday, Mother Nature is turning the switch back to summer this week, at least for one day.
After Tuesday’s 70s highs with low humidity, the heat and humidity will return on Wednesday. A warm front will lift through the area overnight, drawing clouds over the area, allowing for a noticeable rise in dew points. There may be a fog zone that is developing. While many areas remain dry, isolated showers or thunderstorms cannot be ruled out.
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Wednesday starts mild and humid, sun breaks will raise the temperatures in the mid-80s until the afternoon. A stormy southwest wind will develop and put an end to the heat, but it will also hold the temperatures in the 70s on the south coast and for the cape and islands. These southerly winds are ahead of a cold front that will penetrate New England later in the day and increase the risk of thunderstorms.
The combination of heat and humidity increases the risk of storms developing after 2:00 p.m. Isolated strong to severe storms are possible for parts of New England including northern and western MA in VT, NH, and Maine. The main threat with any of these severe storms that develop will be local heavy rains leading to flash floods, strong noxious gusts of wind, hail and frequent lightning strikes. While there is less risk, a tornado or two are also possible.
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The string of isolated showers and storms will slide south and into the Boston area after 6 p.m. Shortly thereafter, with the loss of daytime heating, the risk of major storms could decrease somewhat, but the showers will continue overnight into the early hours of Thursday as the front comes to a standstill near or south of the south coast. As this weather line lingers near the area, clouds remain on Thursday with the risk of showers forming every now and then. If you travel north, there is a better chance of drier weather and even sunshine. Thursday will also be a switch back to cooler and less humid weather. The highs will be in the lower 70s.
The risk of showers could linger until Friday as a coastal storm approaches south of southern New England. We need to watch this feature as it can slide east over the weekend, pulling moisture away from the region, which would allow mostly dry weather and temperate temperatures. An onshore wind can keep coastal conditions cooler, but the trend towards above-average temperatures is possible early next week.
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Stay tuned to WBZ for any updates and changes to the forecast!