How many tornadoes has Duncan, OK had?
Duncan has had 135 tornadoes on record within 25 miles since 1950, including 13 strong to violent (EF3+) tornadoes.
When was the most recent tornado near Duncan?
The most recent tornado within 25 miles of Duncan was an EF3 on November 3, 2024.
When is tornado season in Duncan?
May is historically the peak month for tornadoes near Duncan, with 45 on record. April through June account for 102 of the 135 tornadoes on record near Duncan.
At a Glance
Tornadoes Since 1950
135
Within search radius
Violent (EF3+)
13
9.6% of total
Peak Month
May
45 on record
Per Year Avg
1.8
Across 76 years
Recent Tornado Activity Near Duncan
The last 20 years of confirmed tornadoes within 25 miles —
33 total, averaging 1.6 per year over this window.
2026
0
2025
0
2024
4
2023
8
2022
2
2021
1
2020
2
2019
2
2018
1
2017
2
2016
1
2015
3
2014
2
2013
2
2012
0
2011
0
2010
3
2009
0
2008
0
2007
0
Tornadoes by Decade
1950s
22
1960s
23
1970s
26
1980s
7
1990s
14
2000s
10
2010s
16
2020s
17
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.
EF0
41
EF1
50
EF2
24
EF3
11
EF4
2
Unrated
7
Tornadoes by Month
Jan
0
Feb
4
Mar
11
Apr
39
May
45
Jun
18
Jul
2
Aug
4
Sep
3
Oct
2
Nov
5
Dec
2
Casualties on Record Near Duncan
52 fatalities have been recorded within 25 miles of Duncan since 1950, across 5 events. 1,891 injuries have been reported across all events. 1979 was the deadliest year on record near Duncan.
The deadliest single event was an F4 on April 10, 1979, which caused 42 fatalities along a 46.9-mile track.
Notable Tornadoes Near Duncan
Deadliest Tornado
F4 on April 10, 1979 — 42 fatalities, 46.9 mi path, 1,320 yd wide.
Costliest Tornado
F4 on April 10, 1979 — est. ~$275.0M (NOAA damage class, pre-1996 estimate).
Widest Tornado
F4 on April 10, 1979 — 1,320 yards wide.
Longest Path
F2 on April 10, 1979 — 74.1 mile track.
Most Recent
EF3 on November 3, 2024.
What the record shows near Duncan
The 1970s were the busiest decade near Duncan, with 26 of the 135 confirmed tornadoes within 25 miles; the 2020s have produced 17 so far. The Duncan record runs from the 1950s to today.
Of the tornadoes rated near Duncan, 91 reached EF0 or EF1 and 37 reached EF2 or stronger. The most intense on record near Duncan is rated EF4, of which 2 are logged. A further 7 near Duncan are unrated — events NOAA logged before a damage survey assigned a scale.
Across the last 20 years Duncan has averaged 1.6 confirmed tornadoes a year within 25 miles, 33 in total. 2023 was the busiest of them with 8, and 7 of those years passed with none at all.
Frequently Asked Questions
How many tornadoes has Duncan, OK had?
Since 1950, 135 tornadoes have been recorded within 25 miles of Duncan. Data source: NOAA Storm Prediction Center.
What was the deadliest tornado near Duncan?
The deadliest tornado on record within 25 miles of Duncan was an F4 on April 10, 1979, which caused 42 fatalities.
When is tornado season in Duncan?
May is historically the peak month for tornadoes near Duncan, with 45 tornadoes on record. Tornadoes can occur any time of year, but spring months (April–June) generally see the highest activity across most of the central and southern United States.
Has Duncan been hit by an EF4 or EF5 tornado?
Within 25 miles of Duncan, there have been 0 EF5 and 2 EF4 tornadoes recorded since 1950. EF4 and EF5 tornadoes are the most destructive ratings on the Enhanced Fujita scale, with winds above 166 mph.
When was the most recent tornado near Duncan?
The most recent tornado within 25 miles of Duncan was an EF3 on November 3, 2024.
How do I get tornado warnings for Duncan?
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