Post Severe Weather Coordination Message #3 – Saturday 9/6/25 Severe Weather Outbreak

Hello to all…

..Significant severe weather outbreak across Western, Central and Northeast Massachusetts and Northern Connecticut Saturday Afternoon and Evening with 5 EF1 Tornadoes confirmed in the communities of Paxton, Holden, Berlin and Stow MA (2 separate touchdowns were determined in Paxton). Full tornado path width and length information has now been provided. Also hard hit with wind damage is the Holyoke/Easthampton/Southampton MA area..
..NWS/MEMA Storm Surveys were conducted in the above communities based on the preliminary damage reports received by Amateur Radio and non-Amateur Radio SKYWARN Spotters including efforts from Amateur Radio and non-Amateur Radio SKYWARN Spotters who helped photograph and video storm damage in Paxton, Holden, Berlin and Stow MA. Many thanks to all involved in this effort as it helps the damage survey process..
..Additional reports, pictures and videos of wind damage, hail, flooding, lightning damage, rain gauge reports 1″ or more and measured wind gusts of 40 MPH or greater will be helpful as NWS completes documentation of this severe weather outbreak. They can be sent as a reply to this message, via our WX1BOX Facebook/X/Bluesky feeds or to the email address pics@nsradio.org with credit to the spotter unless otherwise indicated..
..A final post severe weather coordination message will be posted by the end of this week as our national Amateur Radio Association publishes a story on this event. A WX1BOX Facebook Photo Album of damage photos has been added to this update along with an updated Amateur Radio Log of reports..
..Below are the NWS Local Storm Report and Public Information Statement updates on the 5 EF1 tornadoes, the prior NWS Boston/Norton Local Storm Reports/Public Information Statements, updated WX1BOX Amateur Radio Report Log and WX1BOX Facebook Photo Album and a short write-up on some facts around having the 5 EF1 Tornadoes on Saturday 9/6/25..

5 EF1 Tornadoes across parts of Central Massachusetts in the communities of Paxton, Holden, Berlin and Stow MA. One of the tornado touchdowns was twice in the area of Paxton and Holden. These multiple tornado touchdowns were from the same parent severe thunderstorm cell where the tornado lifted for a greater than 2 mile range which by NWS definition consitutes a new tornado touchdown. This is explained in the NWS Storm Data Preparation Directive and can be found in this large document by searching “2 mile” in the document.

This is the first time since the June 1st, 2011 Massachusetts Tornado Outbreak that 5 tornadoes were logged on the same day in the commonwealth of Massachusetts since June 1st 2011 and prior to that, the previous time this happened was July 3rd, 1997. The various reports and statements on the Saturday 9/6/25 severe weather outbreak is listed below:

NWS Boston/Norton Public Information Statement/Local Storm Report – EF1 Tornado Information:
https://wx1box.org/wp-content/uploads/2025/09/PNS_LSR_9_6_25_Tornadoes-Full-Summary.pdf
https://wx1box.org/wp-content/uploads/2025/09/PNS-9-6-25-EF1-Tornadoes-Prelim.pdf

NWS Storm Data Preparation Directive – How Tornado Touchdown Paths are Determined Reference Document:
https://www.weather.gov/media/directives/010_pdfs_archived/pd01016005c.pdf

NWS Boston/Norton Local Storm Reports (Reports prior to Tornado Classifications):
https://wx1box.org/wp-content/uploads/2025/09/LSR-9-6-25.pdf
https://wx1box.org/wp-content/uploads/2025/09/LSR-9-6-25-Sunday-Evening-Monday-Updates.pdf

NWS Boston/Norton Public Information Statement – Hail & Wind Gust Info:
https://wx1box.org/wp-content/uploads/2025/09/PNS-9-6-25-Hail-Wind-Gust-Reports.pdf

WX1BOX Amateur Radio Report Log:
https://wx1box.org/wp-content/uploads/2025/09/reports-9-6-25-rev-3.pdf

WX1BOX Facebook Photo Album:
https://www.facebook.com/media/set?vanity=wx1box&set=a.1196494649179017

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875 (After 6 PM)
Home/Data #: (508) 997-4503 (After 6 PM)
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
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