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Tornado in Norfolk County, Massachusetts
15 tornadoes events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Tornado.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Norfolk County, Massachusetts, has 15 tornado events in the NCEI record since 1950, with at least one in 12 different years.
August is the busiest month, with 4 of the recorded events. The last 20 years account for 6 events against 5 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 7.3% of the 205 tornado events recorded in Massachusetts; its 3.8 per 100 square miles compares with 2.6 statewide.
NCEI attributes 1 death in the county to tornadoes.
By rating: 9 at (E)F0, 4 at (E)F1, 1 at (E)F2, 1 at (E)F3, 0 at (E)F4, 0 at (E)F5. Tornadoes before 2007 carry the original Fujita rating.
Compared with Massachusetts
| Measure | Norfolk County | Massachusetts | US |
|---|---|---|---|
| Tornado events since 1950 | 15 | 205 | 81,281 |
| Per 100 square miles | 3.8 | 2.6 | 2.3 |
| Per 10,000 residents | 0.2 | 0.3 | 2.4 |
| Deaths recorded | 1 | 105 | 6,410 |
| Busiest month | August | July | May |
By year
Seasonality
0Feb
0Mar
0Apr
0May
3Jun
3Jul
2Aug
4Sep
1Oct
1Nov
1Dec
0
Magnitude distribution
Enhanced Fujita scale wind estimates
- EF0/F0
- 65–85 mph (EF0)
- EF1/F1
- 86–110 mph (EF1)
- EF2/F2
- 111–135 mph (EF2)
- EF3/F3
- 136–165 mph (EF3)
- EF4/F4
- 166–200 mph (EF4)
- EF5/F5
- over 200 mph (EF5)
- Unrated
- no rating recorded
Tornado rating as recorded (Fujita scale before February 2007, Enhanced Fujita after).
Recorded events
All 15 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 18 Aug 2023 | Tornado | EF0 | $3K | — | — | — | County |
| 18 Aug 2023 | Tornado | EF1 | $10K | — | — | — | County |
| 29 Jul 2023 | Tornado | EF0 | $5K | — | — | — | County |
| 7 Oct 2020 | Tornado | EF0 | $6K | — | — | — | County |
| 23 Jun 2015 | Tornado | EF0 | $20K | — | — | — | County |
| 9 May 2013 | Tornado | EF0 | $20K | — | — | — | County |
| 21 Aug 2004 | Tornado | F1 | $1.5M | — | — | — | County |
| 30 Jun 2001 | Tornado | F0 | — | — | — | — | County |
| 18 May 1990 | Tornado | F0 | $3K | — | — | — | County |
| 18 May 1990 | Tornado | F0 | $3K | — | — | — | County |
| 10 Jul 1989 | Tornado | F0 | $3K | — | — | — | County |
| 6 Sep 1973 | Tornado | F1 | $25K | — | — | — | County |
| 9 Aug 1972 | Tornado | F1 | $25K | — | 1 | 6 | County |
| 21 Nov 1956 | Tornado | F2 | $3K | — | — | — | County |
| 9 Jun 1953 | Tornado | F3 | $2.5M | — | — | 15 | County |
Questions and answers
How many tornado events has Norfolk County had?
15 events in the NCEI Storm Events record between 1950 and 2026. Reporting of tornadoes became far more complete after 1996, so early decades undercount.
When was the last recorded tornado event in Norfolk County?
18 Aug 2023 (Tornado, EF1). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Norfolk County?
The tornado of 9 Jun 1953, with property damage estimated by NCEI at $2.5M.
How does Norfolk County compare with Massachusetts for tornado?
3.8 events per 100 square miles against 2.6 statewide; the county holds 15 of the state's 205 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Tornado hub and the county page.