The day started (and will end) with plenty of humidity, but also with a blend of clouds and sunshine in greater Boston. As temperatures continue their upward climb toward 90 degrees this afternoon it will feel in the mid-90s. It’s unlikely that we’re going to see a shower or thunderstorm today, although the chance isn’t zero, so it remains in the forecast.
On average, July is the hottest month of the year and 2020 is probably not going to be an exception. Along with the heat and humidity, we are watching a tropical storm take shape to the South. Fay is the name of this new system, a minimal tropical storm.
Forecasters have been watching this area of disturbed weather for many days and it may prompt some street and stream flooding late Friday. There is also the chance of some isolated severe weather.
This weather system will continue to slowly meander northward crossing into New England and then likely somewhere between Eastern New York and Western New England as it heads up into Canada.
The right side of the storm has a strong southerly flow of air with lots of humidity and scattered showers and thunderstorms. The right side of the storm is also the quadrant where any severe weather would occur, should there be any.
During the day tomorrow clouds will tend to thicken and the chance for showers will increase. If you look at the predicted radar loop below, you will notice that the most concentrated area of rain stays to the West of greater Boston.
This loop runs through Saturday. The trend over the past day has been to move the system a little faster and keep it a little further west. Most of the shower activity will occur from late Friday into the pre-dawn hours of Saturday, which means that Saturday itself is probably mainly dry, although certainly humid and certainly with the chance for a couple of showers. In other words, I don’t want to oversell Saturday being great, but I also don’t want to oversell the rain, because I think it will be generally rain-free post sunrise. Total rainfall won’t be too high except in scattered heavier downpours. Some areas may see very little total rainfall.
Sunday is still warm and humid, the better of the two weekend days for sure. There might be a shower or two, but most of the day will be partly sunny and warm. The warmth and generally humid conditions continue into next week although there might be a small break in the humidity for a day or two.