Figure 1 depicts the surface observations at 2:00 am EDT, which shows a cold front in the northeast United States. This front eventually moved east toward Massachusetts and triggered thunderstorms, which ultimately led to two F2 tornadoes across the southwestern part of the state.
The Oakdale, MA F2 tornado of August 11, 1966 impacted Hampden County in Massachusetts. According to NOAA (2019), the F2 tornado caused no fatalities or injuries, but caused $250 thousand dollars in property damage. The tornado touched down in Oakdale near Beech Street at 7:00 pm EDT. The tornado travelled for 5.6 miles and had a maximum width of 67 yards.
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/