The heavy rain will likely taper off during the morning before colder air arrives with the afternoon clearing.
The Sunday-Monday storm system unleashed heavy rain throughout the region, leading to a wet Monday morning commute for workers and students.
There were three elements to this weather system: rain, wind, and coastal flooding. They were not equal in their impact, however. The rain was really the big issue, and some places saw as much as 5 inches of it.
There was an axis of heavy rain running from northwest Connecticut and Rhode Island somewhere through central and perhaps even eastern Massachusetts. It is along this axis that the highest risk of flooding existed.
The reason for the heavy rain was a plume of tropical moisture originating from the Gulf of Mexico streaming northward across the East Coast.
Once the cold front passes, the gusty winds will abruptly shift to the northwest, and the southerly strong wind will shut down.
In the wind gust loop below, notice the warmer colors that are representative of the strongest winds and the sharp demarcation between the lighter winds to the north.
Some minor coastal flooding was expected at high tide Monday morning, but that is the least impactful part of the storm. Freshwater flooding from all of the rainfall is potentially the biggest issue. Some of the more susceptible roads could be potentially affected for a short time Monday morning.
It turns colder and drier for Tuesday and Wednesday, before a moderating trend ensues heading into next weekend, when temperatures will once again return to above average. This type of pattern is very typical in strong El Niño years.