Figure 1 depicts the surface observations at 2:30 am EDT, which shows a cold front across the U.S. Midwest and a warm front across the Great Lakes. The cold front moved east throughout the day and triggered thunderstorms, which reached Massachusetts in the late-evening hours of November 21st. These thunderstorms were responsible for three F2 tornadoes across the state.
The Canton Junction, MA F2 tornado of November 22, 1956 impacted Norfolk County in Massachusetts. According to NOAA (2019), the F2 tornado caused no fatalities or injuries, but caused $2.5 thousand dollars in property damage. The tornado touched down in Norfolk County just southeast of US-MA 95 at 1:15 am EDT. The tornado travelled for 0.1 mile and had a maximum width of 17 yards.
Sources
NOAA Central Library. (2019). U.S. Daily Weather Maps. Wednesday November 21, 1956 [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/
