As MIT welcomes the families of students and alumni for commencement and class reunions, the Boston “weather machine” is showing its notorious variability. A strong low-pressure system moved through the area yesterday, bringing heavy rain. During commencement this morning, the tail end of this system is pushing through the region. Conditions will be mostly cloudy. Showers are possible, with the weather models predicting about a 20 percent chance of rain. The likelihood of rain diminishes later in the day Friday and into Saturday.
After this system moves over the Atlantic, we will experience more dry and seasonably warm conditions. The weekend will be mostly sunny with highs in the upper 70s.