Florence, MA F3 Tornado of September 13, 1971

Hampshire County

Figure 1 depicts the surface observations at 8:00 am EDT, which shows a complex storm system off the east coast of the United States. A stationary front is seen extending across Massachusetts, bringing a lot of precipitation across the northeastern U.S. This front became the focus for thunderstorm activity, which ultimately led to this tornado.

Figure 1. Surface weather map for September 13, 1971 at 8:00 am EDT (NOAA, 2019).

The Florence , MA F3 tornado of September 13, 1971 impacted Hampshire County in Massachusetts. According to NOAA (2019), the F3 tornado caused no fatalities or injuries, but caused $25 thousand dollars in property damage. The tornado touched down near Nonotuck Street at 1:15 pm EDT. The tornado travelled for 0.5 miles and had a maximum width of 7 yards.


NOAA Central Library. (2019). U.S. Daily Weather Maps. Monday September 13, 1971 [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/