New England has been dominated by domes of high pressure for the better part of two weeks now. More recently, this high pressure has resulted in a Rex Block (high pressure directly over low pressure, blocking the low pressure’s northward advancement) since the middle of last week. This has brought very stagnant, warm weather to New England along with a growing dry spell. This will finally be changing going forward, but it won’t be an abrupt change. It will be a positive change for those who want more fall-like temperatures.
Today will be more of the same with plenty of sunshine and warm, summer-like temperatures. Wednesday will see the strong dome of high pressure begin to weaken. As this happens, low pressure will slowly work northward up the coast. Wednesday will be another warm day, but some clouds will be able to develop ahead of the approaching system. On Thursday, clouds will be much more common across southern and central New England and showers will move through southern New England.