Not A Typical Day
Posted by Jeremy Reiner
A typical summer day would offer dry weather at the start of the day have the sun bake the air then the afternoon heat & humidity would pop thunderstorms after 3pm. That's typical. Today won't be typical. We already have showers & t-storms forming across southern New England and they will tag most of us before noon.
These showers & thunderstorms are out ahead of a cool front that marks the leading edge of much drier air. Unfortunately, this front is about to fall apart on top of us and will never really offer up its goods (dry, Canadian air). I do think this front will shove most, if not all, of the showers/thunderstorms offshore after 4pm so the day won't be completely washed out. There will be gaps in the showers/storms and even some sun. it will also be wicked humid for much of the day and that humidity will lead to some locally heavy downpours.
By Friday that front will be offshore but only by a few miles. This means a fair amount of clouds will be around as well as the risk of some showers/t-storms down in Buzzards Bay/Cape/Islands throughout the day. For the rest of us it will be a decent summer day with slightly lower humidity and only a minimal risk (less than 10%) of afternoon showers.
As we step into the weekend, high pressure begins to build back into New England--not from Canada with fresh, dry air but rather the Atlantic. this means humidity & heat will begin to build throughout the weekend. On Saturday there may be an isolated t-storm with that building heat/humidity but again..isolated. Sunday looks like the nicer of the two weekend days with seasonably warm temps and a fair amount of sunshine.
Watch out for those brief heavy downpours today!