Boston has received nearly three inches of rain over the first half of August…that’s roughly the amount it should see for the entire month. I’m going to state the obvious here…we have been in a wet pattern. However, the pattern is shifting this week to a much drier one.
Over the last few weekes, the Northeast has been under the influence of a longwave trough sagging south from Central Canada. This has sent a series of fronts through the region the have stalled near the coast due to downstream blocking. This has created a very muggy / moist flow up the East Coast which has led to a lot of rain. That same longwave trough will slowly retreat this week deeper into Northern Canada. The flow will become much more zonal and benign and the rain threats will be very small for the first time in a few weeks. There is a weak coldfront to our west and showers will continue to diminish along it through the course of the evening. But the weak convergence that the front causes will be situated over Central and Eastern MA tomorrow afternoon. That along with some additional low level convergence created by a seabreeze may be enough to spark a brief shower or rumble of thunder…anything that develops would be very isolated…nothing widespread.
The front will wash out as surface high pressure builds through the middle of the week. This will lead to lots of sun and dry conditions. Temps will be climbing inland into the mid 80s while the coast stays tempered by seabreezes…upper 70s close to 80.
Enjoy the week!