According to Wikipedia,
"a "Rochester accent" can be described as similar to the accent commonly found in the Great Lakes region, like a "Detroit accent". It has also been described by some as "nasally", most easily recognized by the vocalization of the short "a" (æ) sound: "and" is delivered as something closer to "eee-yand".
It is often described as including the pronunciation of the city itself as "Rhaaaaach'str". The younger generations have, for the most part, a weaker accent."