Shannon County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Shannon County: 4.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Claims by ZIP code

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).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Mapped landslides

Mapped by MO DNR (1).

1. Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.

USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.

Costliest events since 1996

1. Nov 4, 2024Flash Flood$8.8 million
   National Weather Service narrative

   Route P at Big Creek was closed due to flooding. Additional county property damages were reported throughout the entire county, primarily to dirt roads and bridges, with many facilities, campgrounds, and river access points sustained damage to the Scenic Riverway parks. Damage cost estimates are a reflection of the county as a whole. Unprecedented river levels caused devastating impacts to facilities at Akers and Pulltite. The Akers Ranger Station, which also houses Akers Ferry Canoe Rental, had approximately two feet of water throughout. The old Akers Ferry Canoe Rental store was almost fully submerged, sustaining significant damage.| |At Pulltite Campground, water reached the…

2. Apr 29, 2017Flash Flood$5.0 million
   National Weather Service narrative

   Numerous campgrounds and river access areas were severely damaged across Shannon County and in the Ozark National Scenic Riverways Park. Numerous homes and businesses were severely damage or washed away along the Jack Fork River and Current River. This report will contain the total dollar estimate for flood damage to infrastructure, businesses, and homes across Shannon County.

3. May 8, 2009Thunderstorm Wind$3.0 million
   National Weather Service narrative

   Sixty to 85 mph winds caused intense damage to trees, power poles, and structures over much of Shannon County. This damage was widespread, and impacted almost all communities within the county. The Missouri Department of Conservation estimated that nearly 13 million dollars of damage occurred to forest land, some of which was due to tornadoes. Hundreds if not thousands of structures sustained some type of damage. A sawmill was destroyed with only one wall left standing near the intersection of Highway 19 and Highway D.

4. Apr 25, 2011Flash Flood$1.0 million
   National Weather Service narrative

   Numerous rural roads and low water crossings were flooded throughout the county.||The total cost estimate for flooding damages for Shannon County for this entire episode has been included. This includes roads, bridges, and structures which were affected.

5. Dec 28, 2015Flash Flood$500,000
   National Weather Service narrative

   Flash flooding caused damage to several Ozarks Scenic Riverways campgrounds including along the Jack Fork River and Alley Spring campground. There were several roads and structures that were damage by flood water. This storm report will contain the damage estimates for the entire county for this event.

6. Aug 1, 2022Drought, Shannon$190,000
   National Weather Service narrative

   Drought conditions improved across Shannon County by the middle of August. The US Drought Monitor indicated that abnormally dry (D0) conditions remained at the end of the month after several rainfall events helped ease drought conditions below severe (D2) drought levels. Impacts across the region were primarily felt in larger scale agriculture with farm and stock ponds low but improved. Dry conditions caused grasses to dry and significantly impact hay production causing losses in hay cutting. Many farmers saw impacts to row crops such as soy beans, corn and other specialty crops. Much of the losses from row crops will not be felt until the fall when harvest occurs.

7. Jan 1, 1999Winter Storm, Shannon$150,000
   National Weather Service narrative

   Winter Storm Highlights:* At one point late on the 1st and early on the 2nd, the Barton County Electrical Cooperative lost power to 4500 members out of a 5800 member system. Numerous wires, power lines, and trees were downed due to a heavy ice accumulation.* In south central Missouri, the Howell-Oregon Electric Cooperative lost power to 16,000 of it's 21,000 members due to downed power lines and trees from a heavy ice accumulation. Some customers were without power for 6 days. Ice accumulated to 2 inches in some locations in south central Missouri.* In central Missouri on January 2nd, The Empire Electric Cooperative said that power had been interrupted to 35,000 of it's customers…

8. Jul 29, 1998Flood, Shannon$142,000
   National Weather Service narrative

   A series of thunderstorm complexes over central and south central Missouri produced widespread flooding. Cooperative weather stations reported over 8 inches of rain at Versailles (Morgan County), Rolla (Phelps County, and Salem (Dent County). Flooding caused widespread damage to roads and low water crossings and bridges. The Missouri Governor declared a state of emergency for several counties in central Missouri including Benton, Dent, Maries, Miller, Morgan, Phelps, and Shannon. In Miller County, flooding caused widespread damage to roads and low water bridges. Significant damage occurred to corn (50% damaged), soybean (50% damaged), hay (35% damaged) crops. Cattle (300 head) and…

9. Jan 12, 2005Tornado$100,000
   National Weather Service narrative

   This tornado is a continuation of the Howell County tornado. The tornado crossed the Howell and Shannon County line northeast of Mountain View and remained on the ground for two miles into Shannon County. One structure and several trees were damaged in it's path.

10. Mar 14, 2025Tornado$100,000
    National Weather Service narrative

    This is the continuation of the tornado out of Oregon County that moved into far southeastern Shannon County. This tornado uprooted hundreds of trees before moving northeast into Carter County and intensifying.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

107°FJul 19, 1980

All-time low

−19°FJan 20, 1985

Warmest night

84°FJun 17, 1990

Coldest day

2°FFeb 16, 2021

Wettest day

6.03 inApr 30, 2017

Snowiest day

13.0 inMar 17, 1970

Hottest year

2016mean 58.2°F

Coldest year

2008mean 53.3°F

Wettest year

197365.12 in

Driest year

195321.62 in

Snowiest season

34.5 in2002-03

Station Summersville 3 Se (USC00238184), 1,236 ft elevation, 11.8 miles from the population centre. Daily records from 1963 to September 30, 2026; 92.1% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

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).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00238184.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.