MILLIS (CBS) — The National Weather Service confirmed Saturday that an EF-0 tornado occurred in Millis during the storm on Oct. 7. The tornado had wind speeds up to 80 mph.

A damage survey was conducted after the NWS spoke with emergency management officials and looked at radar images of the storm.

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“Even though it was more than one week ago, we were able to determine that a weak EF-0 tornado circulations occurred in a small portion of the town of Millis, MA. It was embedded with the larger area of the derecho/straight-line wind event that occurred that day,” said an NWS statement.

The tornado traveled about half a mile in about one minute at 5:50 p.m. The maximum path width was 50 yards.

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According to the NWS, it began near Orchard Street and traveled east-southeast to the Oak Grove Playground/Millis Historical Commission on Exchange Street.

A damaged home in Concord after Wednesday’s storm (WBZ-TV).

The storm has already been labeled as a derecho, which is a line of thunderstorms that holds together for a very long time (at least 240 miles) while producing widespread damaging, straight-line winds that are persistently greater than 58 mph. This one started around the Lake Ontario area and made it all the way to Cape Cod (about 300 miles).

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The last derecho in New England was in 1995.