Adams County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Adams County: 2.
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.

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.

Costliest events since 1996

1. Mar 1, 1997Flash Flood$8.0 million
   National Weather Service narrative

   Estimated rainfall of 6 to 12 inches across the county in less than 36 hours caused area creeks and streams to rise out of their banks. Numerous roads were closed due to high water. Several rescue operations occurred. Five hundred homes were damaged beyond repair with 700 more having reparable damage. Two people were killed during this event. A boy was swept away while riding an all-terrain vehicle and a women was killed when her car was swept off a bridge along State Route 32 near Lawshe. Her husband survived by clinging to a tree.

2. Mar 2, 1997Flood, Adams$4.0 million
   National Weather Service narrative

   Heavy rainfall occurred across Southern Ohio and Northern Kentucky on the 1st and 2nd with areas along the Ohio river receiving up to 12 inches of rainfall. The river rose rapidly reaching a crest of 59.8 feet at Portsmouth at 1000 pm on the 4th. Flood stage is 50.0 feet. Further downstream at Meldahl Dam, the river crested at 61.3 feet at 700 pm on the 6th. Flood stage is 51.0 feet. In Cincinnati, the river crested at 64.7 feet at 1100 pm on the 5th. Many towns were flooded from Portsmouth to Cincinnati and thousands of people were evacuated from their homes for several days.

3. Sep 14, 2008High Wind, Adams$3.3 million
   National Weather Service narrative

   Strong winds of 40 to 50 miles per hour were sustained for several hours. Wind gusts over 60 mph were common. Widespread damage occurred across the region, from trees being blown down on powerlines, to significant crop losses and structural damage.

4. Mar 2, 2012Tornado$2.0 million
   National Weather Service narrative

   The tornado touched down just east of Highway 41, about 2 miles northeast of West Union. The tornado then traveled east northeast for just over 11 miles, destroying at least 5 mobile homes. Two homes were also damaged. One of these homes was built of brick. A 99 year old woman was in her mobile home in Tiffin Township when the tornado struck. She was injured from this tornado and passed away several days later. Two others were also injured from this tornado. A dozen cattle were killed and major power transmission poles were knocked over. Numerous trees were snapped or uprooted. Based on the damage surveyed, the maximum estimated wind speed of this tornado was 125 miles per hour.

5. May 15, 1996Flood, Adams$1.0 million
   National Weather Service narrative

   Torrential rainfall of 3-4 inches in less than 12 hours caused the Turkey Creek and Scioto/Ohio Brush Creek to overflow their banks. The flooding affected approximately 6 mobile homes. Several washouts of roads, culverts, and low water bridges also cut off access to some residences. The Ohio Brush Creek was over flood stage for nearly 24 hours and reached a crest of 24 feet. The flood stage is 15 feet.

6. Mar 1, 1997Flood, Adams$1.0 million
   National Weather Service narrative

   Persistent heavy rainfall of over 10 inches in less than 36 hours caused the Ohio Brush Creek to rise rapidly out its banks. The river crested at 31.0 feet which is the second highest stage on record and the highest since 1962. More than 20 miles of State Rte 348 were covered and Routes 32 and 41 outside of Peebles were flooded. Also, water flooded onto State Rte 125 near West Union. Numerous homes and farms were flooded.

7. Jun 8, 2018Flash Flood$750,000
   National Weather Service narrative

   Water rushed over State Route 247 and 770, completely covering the roadway in the gravel from the shoulders, and washing the shoulders away.

8. Jun 8, 2018Flash Flood$750,000
   National Weather Service narrative

   The gravel from a railroad bed was washed away.

9. Jan 6, 1996Winter Storm, Adams$500,000
   National Weather Service narrative

   The Blizzard of '96 developed near the Gulf Coast and moved up the East Coast. This massive system produced the greatest total and 24 hour snowfall at Greater Cincinnati\Northern Kentucky airport. This one storm brought 14.3 inches of snowfall to the airport which normally receives 23 inches for an entire season. The heaviest snow fell near the Ohio river in the extreme south. The worst blizzard conditions occurred over West Central areas as dry and powdery snow was blown around by high winds causing whiteouts. Some areas had more than 30 continuous hours of snowfall, and many people in Southern Ohio felt this was the worst winter storm since the Blizzard of '78. In Fayette…

10. Jan 23, 1996Flood, Adams$500,000
    National Weather Service narrative

    By the 23rd many tributaries to the Ohio river had already crested and were receding back within their banks. However, a significant rain event occurred on the 23rd bringing over 2 inches of rain to South Central areas with lesser amounts to the north. Many tributaries were pushed back into flood on the 24th, and the flood crest moved downstream on the Ohio river. While most tributaries only experienced minor to moderate flooding, backwater flooding from the Ohio resulted in major flooding along some of the tributaries. The Little Miami river was flooded particularly bad just east of Cincinnati. Evacuations took place near the confluence of the Ohio and Little Miami rivers on the…

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

108°FJul 22, 1901

All-time low

−25°F2 times, most recently Jan 20, 1994

Warmest night

79°FJun 10, 2010

Coldest day

−5°FJan 21, 1985

Wettest day

6.34 inJul 23, 2017

Snowiest day

16.0 inJan 17, 1994

Hottest year

1921mean 59.0°F

Coldest year

1963mean 49.6°F

Wettest year

201162.44 in

Driest year

193020.34 in

Snowiest season

43.6 in1917-18

Station Maysville Wwtp (USC00155243), 515 ft elevation, 18.4 miles from the population centre. Daily records from 1896 to October 19, 2026; 88.0% 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 USC00155243.
• 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.
• 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.