Townsend, MA F1 Tornado of July 11, 1970

Middlesex County

Figure 1 depicts the surface observations at 8:00 am EDT, which shows a cold front moving across the northeast United States. This front became the focus for thunderstorms and ultimately this tornado in the overnight hours of July 11th.

Figure 1. Surface weather map for July 11, 1970 at 8:00 am EDT (NOAA, 2019).

The Townsend , MA F1 tornado of July 11 , 1970 impacted Middlesex County in Massachusetts. According to NOAA (2019), the F1 tornado caused no fatalities or injuries, but caused $25 thousand dollars in property damage. The tornado touched down near Townsend at 3:15 am EDT. The tornado travelled for 0.1 mile and had a maximum width of 50 yards.


NOAA Central Library. (2019). U.S. Daily Weather Maps. Saturday July 11 8, 1970 [PDF]. Retrieved from

NOAA National Centers for Environmental Information (2019). Storm Events Database. Retrieved from: