Harrison, NJ Tornado History — 55 Tornadoes Since 1950
How many tornadoes has Harrison, NJ had?
Harrison has had 55 tornadoes on record within 25 miles since 1950, including 1 strong to violent (EF3+) tornado.
When was the most recent tornado near Harrison?
The most recent tornado within 25 miles of Harrison was an EF1 on June 26, 2023.
When is tornado season in Harrison?
July is historically the peak month for tornadoes near Harrison, with 16 on record. April through June account for 8 of the 55 tornadoes on record near Harrison.
At a Glance
Recent Tornado Activity Near Harrison
The last 20 years of confirmed tornadoes within 25 miles — 17 total, averaging 0.8 per year over this window.
Preliminary tornado reports near Harrison since December 29, 2025
These are 2 preliminary reports, not confirmed tornadoes. They have not yet been through an NWS damage survey, and are not counted in the confirmed totals above.
Preliminary reports are revised, merged, and sometimes withdrawn — historically about 23% are consolidated downward once surveys complete. Ratings are omitted until a survey assigns one.
Confirmed records above are complete through December 29, 2025. NOAA publishes the confirmed archive annually, so tornadoes after that date appear here first and move into the totals above once finalized.
NWS storm survey confirmed an EF-1 tornado producing a narrow swath of damage with estimated wind gusts of 65 to 97 mph across the far western end of Atlantic Beach bet (OKX)
Updates previous tornado report from 1 N Troy Hills. A EF-1 tornado touched down behind the ridgeline on Windsor Drive in the Pine Brook section on Montville around 2:5 (PHI)
Within 25 miles of Harrison. Quoted text is the report narrative exactly as filed. Source: NOAA Storm Prediction Center preliminary storm reports, updated daily.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Casualties on Record Near Harrison
1 fatality has been recorded within 25 miles of Harrison since 1950, across 1 event. 38 injuries have been reported across all events. 2010 was the deadliest year on record near Harrison.
The deadliest single event was an EF1 on September 16, 2010, which caused 1 fatality along a 4.0-mile track.
Notable Tornadoes Near Harrison
What the record shows near Harrison
The 1980s were the busiest decade near Harrison, with 12 of the 55 confirmed tornadoes within 25 miles; the 2020s have produced 5 so far. The Harrison record runs from the 1950s to today.
Of the tornadoes rated near Harrison, 50 reached EF0 or EF1 and 5 reached EF2 or stronger. The most intense on record near Harrison is rated EF3, of which 1 is logged.
Across the last 20 years Harrison has averaged 0.8 confirmed tornadoes a year within 25 miles, 17 in total. 2010 was the busiest of them with 3, and 10 of those years passed with none at all.