Public Information Statement
Issued by NWS Boston, MA

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Public Information Statement
National Weather Service Boston/Norton MA
1023 AM EDT Sat Oct 17 2020

...NWS SURVEY HAS DETERMINED THAT A WEAK TORNADO OCCURRED
IN MILLIS, MA ON 10/7/20...

Start Location...Millis in Norfolk County, MA
End Location...Millis in Norfolk County, MA
Date...OCT 7 2020
Estimated Time...550-551 PM EDT
Maximum EF-Scale Rating...EF0
Estimated Maximum Wind Speed...80 mph
Maximum Path Width...50 yards
Path Length...0.5 miles
Beginning Lat/Lon...42.1842/-71.3733
Ending Lat/Lon...42.1815/-71.3636
* Fatalities...0
* Injuries...0

...Summary...
Based on information received from emergency management
officials and based on Doppler radar imagery from
October 7th, the National Weather Service recently
conducted a damage survey in the towns of Medway, Millis,
and Medfield in Norfolk County. Even though it was more than
one week ago, we were able to determine that a weak EF-0
tornado circulation occurred in a small portion of the town
of Millis, MA.  It was embedded within the larger area of
the derecho/straight-line wind event that occurred that day.
The tornado was on the ground for less than a minute,
traveling a distance of about one-half mile. The path width
was estimated at only 50 yards and maximum wind speed was
estimated at 75 to 80 mph.

The tornado began near Orchard Street, just to the west of
Ridge Street, and traveled east-southeastward to the
Oak Grove Playground/Millis Historical Commission on
Exchange Street. On Orchard Street, the tops of a few
large trees were sheared off. According to one resident,
she had two trees down from west to east in her backyard
but she observed the wind change directions and the
aforementioned tree tops were blown northward, landing in
her yard. At the Oak Grove Playground, a large tree was
downed from west to east but a metal mailbox post was blown
northwestward toward that tree. Other trees were observed
down from as far west as near Tupello Road to as far south
as Causeway Street and Island Road. Damage reportedly went
as far east as Environmental Drive, Larch Road, and Dwight
Street, but that had since been cleaned up. Those damage
areas likely were associated with the broader straight-line
winds of the large-scale derecho that impacted much of
Massachusetts and northern Rhode Island on October 7th.

The National Weather Service would like to thank the
Emergency Management Directors in Medway and Millis
and the resident who spoke with us.

EF Scale: The Enhanced Fujita Scale classifies tornadoes
into the following categories:

EF0...Weak......65 to 85 mph
EF1...Weak......86 to 110 mph
EF2...Strong....111 to 135 mph
EF3...Strong....136 to 165 mph
EF4...Violent...166 to 200 mph
EF5...Violent...>200 mph

* The information in this statement is preliminary and subject to
change pending final review of the event and publication in NWS
Storm Data.

$$
Field

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