Figure 1 depicts the surface observations at 6:00 am EDT, which shows a cold front moving across the northeast United States. This front became the focus for thunderstorms, which ultimately led to this tornado.

The South Branch Park, MA F0 tornado of July 19, 1968 impacted Hampden County in Massachusetts. According to NOAA (2019), the F0 tornado caused no fatalities or injuries, but caused $250 dollars in property damage. The tornado touched down near Burt Road at 5:15 pm EDT. The tornado travelled for 0.1 miles and had a maximum width of 33 yards.
Sources
NOAA Central Library. (2019). U.S. Daily Weather Maps. Thursday August 11, 1966 [PDF]. Retrieved from https://library.noaa.gov/Collections/Digital-Collections/US-Daily-Weather-Maps
NOAA National Centers for Environmental Information (2019). Storm Events Database. Retrieved from: https://www.ncdc.noaa.gov/stormevents/