NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Dewey, OK
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Dewey, Oklahoma since records began in 1851. Since 1950, 125 tornadoes have touched down within 25 miles, 6 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 125
- EF3 or stronger
- 6
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
4 deaths in all
What the records show for Dewey
The strongest of the 125 tornadoes within 25 miles was an EF4 on May 6, 2024; its path came within 2 miles, and it killed 2 people. Of the 125, 15 had paths within 5 miles of the city centre, and 55 have come since 2000. April has had the most tornadoes, 41. The most recent tornado was on November 4, 2024. Of the 216 Oklahoma cities on this site, 83% have more tornadoes within 25 miles than Dewey. Hail has been reported within 10 miles 223 times since 1957, with stones up to 4.5 inches (grapefruit size). Dewey has more hail reports within 10 miles than 75% of the 216 Oklahoma cities.
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Tornadoes within 25 miles of Dewey
By decade
- 2020s13(1 EF3+)
- 2010s28
- 2000s14(1 EF3+)
- 1990s23
- 1980s18(1 EF3+)
- 1970s9(2 EF3+)
- 1960s6
- 1950s14(1 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 6, 2024 | EF4 | 2 mi | 40.8 mi | 2 / 33 |
| Mar 15, 1982 | F3 | 15 mi | 6 mi | 1 / 1 |
| May 8, 2003 | F3 | 12 mi | 45 mi | 0 / 0 |
| Mar 18, 1979 | F3 | 6 mi | 7.9 mi | 0 / 0 |
| May 26, 1973 | F3 | 11 mi | 0.3 mi | 0 / 3 |
| May 9, 1959 | F3 | 22 mi | 23.4 mi | 0 / 0 |
| Apr 26, 1991 | F2 | 5 mi | 6 mi | 1 / 10 |
| Apr 30, 2019 | EF2 | 20 mi | 9.8 mi | 0 / 0 |
| Mar 30, 2006 | F2 | 22 mi | 16 mi | 0 / 1 |
| Apr 19, 2003 | F2 | 2 mi | 20 mi | 0 / 3 |
| May 26, 1996 | F2 | 21 mi | 30 mi | 0 / 1 |
| Apr 26, 1984 | F2 | 24 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 125, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Dewey
The Storm Prediction Center has 223 hail reports within 10 miles of Dewey since 1957, made on 147 separate days. Of these, 112 were 1 inch across or larger, and 10 reached 2 inches. The largest size, 4.5 inches (grapefruit size), was reported on 2 days, most recently May 8, 2000. The most recent report is from June 17, 2025. April has the most reports, 66.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Dewey
The nearest NOAA station with 1991–2020 climate normals is Bartlesville 3, OK, 6 miles southwest of Dewey at 715 feet. July is the warmest, with an average high of 93°F and low of 68°F; January is the coolest, at 48°F and 22°F. June is the wettest at 5.3 inches of precipitation on average and February the driest at 1.9 inches; the year adds up to 39.7 inches over 61 days with at least a tenth of an inch. Highs reach 90°F on about 71 days a year, almost all from May to September. Lows fall below freezing on about 109 nights a year. That 39.7 inches is more than at 46 of the 82 Oklahoma stations used on this site (56%). Caney, KS, 15 miles north, has its own station (Coffeyville Wtr Wks, KS): 46.1 inches a year, 6.4 more than here, and a July average high of 91°F against 93°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 48 | 22 | 2.0 | 3 |
| Feb | 53 | 26 | 1.9 | 4 |
| Mar | 62 | 34 | 2.9 | 5 |
| Apr | 71 | 44 | 4.0 | 6 |
| May | 79 | 54 | 4.9 | 9 |
| Jun | 88 | 64 | 5.3 | 7 |
| Jul | 93 | 68 | 3.7 | 5 |
| Aug | 92 | 66 | 3.3 | 5 |
| Sep | 85 | 57 | 3.5 | 5 |
| Oct | 74 | 45 | 3.5 | 5 |
| Nov | 61 | 33 | 2.5 | 4 |
| Dec | 49 | 25 | 2.2 | 4 |
| Year | 71 | 45 | 39.7 | 61 |
Averages for 1991–2020 at Bartlesville 3, OK (715 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Dewey
Since 1996, the National Weather Service has logged 195 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Dewey: 166 thunderstorm wind reports, 22 flash floods and 7 floods. None is recorded as killing or injuring anyone; the NWS estimated $3.4 million in property and crop damage. The strongest thunderstorm gust on record here was 87 mph, on April 26, 2016. May has had the most flash floods, 9 of 22. Of the 216 Oklahoma cities on this site with a flash flood on record, 137 have had fewer than Dewey.
September 1, 2014: thunderstorm wind 5 miles from the centre of Dewey — $1.5 million damage.
July 1, 2007: flood 6 miles from the centre of Dewey — $1.0 million damage.
May 4, 1999: thunderstorm wind 5 miles from the centre of Dewey — $135,000 damage.
NWS: “Significant damage was reported at several farms and residences on the south side of Copan. There were a total of four houses that received chimney and roof damage.”
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in Dewey's ZIP code 74029 have filed 33 claims with the National Flood Insurance Program since 1986, and were paid $851,000 for buildings and contents, in the dollars of each year. The year with the most claims was 2007, with 11. 18% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 92 Oklahoma cities on this site with 10 or more claims, 40 have fewer than Dewey.
Washington County, which includes Dewey, has been named in 34 federal disaster or emergency declarations since 1973, 22 of them major disasters (by incident: 11 severe storms, 9 ice storms, 5 fires, 3 floods). The latest major disaster declaration was Severe Storm and Straight-Line Winds, on October 7, 2026. FEMA's National Risk Index gives Washington County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively High for tornadoes; Relatively Moderate for inland flooding, strong wind and heat waves; Relatively Low for hail and lightning; Very Low for hurricanes. It models the county's expected loss from all 18 hazards it covers at $31.8 million a year, the 18th highest of 77 Oklahoma counties; of the hazards above, the largest share, $13.9 million (44%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Dewey
- Bartlesville, OK5 mi
- Caney, KS15 mi
- Nowata, OK18 mi
- Ramona, OK19 mi
- Pawhuska, OK22 mi
- Talala, OK23 mi
- Coffeyville, KS23 mi
- Oologah, OK28 mi
- Skiatook, OK30 mi
- Independence, KS30 mi
- Collinsville, OK31 mi
- Chelsea, OK32 mi
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