Greene County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Greene County: 0.
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.

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 NASA (2), WV GS (2), USGS Conterminous (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.

More event types since 1996

Costliest events since 1996

1. Sep 17, 2004Flood, Greene$6.1 million
   National Weather Service narrative

   It started 5 PM EDT 17th, when Graysville flooded, according to newspaper accounts. By 740 PM on 17th, there was widespread road and stream flooding countywide, including all roads in and out of Greensburg; Rte 21 in Franklin Twp; and Rte 18 in Centre Twp. Total of 157 homes and 46 businesses damaged or destroyed. Total rain: about 5 inches. (IVAN)

2. Oct 6, 2024Thunderstorm Wind$1.5 million
   National Weather Service narrative

   Several trees fell down across powerlines.

3. Jun 26, 2024Thunderstorm Wind$1.0 million
   National Weather Service narrative

   A well-organized upper shortwave trough crossing the western Great Lakes and Ohio River Valley and associated cold front crossed the region. Warm, moist conditions across the Ohio River Valley along with limited cloud coverage resulted in increasing instability (2000-3000 J/kg) over the course of the day. This along with increasing vertical wind shear up to 40kts (effective) as the trough and front approached from the west brought conditions favorable for severe weather by late afternoon / early evening. Damaging wind was the main threat with a notable mid-level dry layer, however, tornadoes were also possible.

4. Jan 19, 1996Flood, Greene$440,000
   National Weather Service narrative

   On the Monongahela River near record flooding occurred at all Pennsylvania forecast points, except where record flooding occurred at Lock 2 Braddock. The crest at Lock 2 actually exceeded the crest during the flood of November 1985 by almost a foot. This was due to the tremendous contribution made by the Youghiogheny River during this particular flood. The crest at Braddock was 29.1 feet, 7.1 feet above its 22 foot flood stage, at 9 am on the 20th. Damage was extensive along the river.In Greene County, 9 homes, 3 businesses, and 3 trailer courts were affected.In Fayette County, 499 residences, 55 businesses, 4 churches, 1 fire department, 30 roads, 5 bridges, and 4 sewage plants…

5. Apr 23, 1996Thunderstorm Wind$300,000
   National Weather Service narrative

   Strong downburst winds from a severe thunderstorm produced substantial damage through a path across Greene County. Numerous trees were downed. Twenty structures were either damaged or destroyed in the county. Waynesburg was particularly hard hit. Most of the roof of a hotel was torn from the building. Damage to the hotel alone totaled $60,000. Part of the hotel's roof struck the side of a passing pick-up truck. The driver was not injured, but his truck door was damaged and a window was smashed. A few cars in the parking lot were also damaged. Roofs were also torn from barns, houses and a roller skating rink in and near Waynesburg. Heavy damage was occurred at the Greene County…

6. Nov 19, 2003Flash Flood$250,000
   National Weather Service narrative

   Stewart Run caused flooding of roads near Oak Forest. About 3 hours later, flooding from Ten Mile Creek was reported in Waynesburg. Houses and businesses were flooded in Lincoln, Elm, and First streets. Other roads flooded: Routes 19, 21, and 218. At 5 PM, children were stuck inside school since there was only one way out of Waynesburg. They was able to escape after 6:30 PM and went home uninjured. Total of 389 houses and businesses damaged in Waynesburg, Oak Forest, and Rogersville, and throughout Greene County. People at 41 locations had to be evacuated for their own safety.

7. Jul 8, 2008Thunderstorm Wind$200,000
   National Weather Service narrative

   Emergency management reported numerous trees down in Waynesburg and in areas east of the city.

8. Aug 1, 2022Tornado$200,000
   National Weather Service narrative

   NWS Pittsburgh storm damage team confirmed that a tornado did occur in Greene County on the evening of August 1, 2022. ||Damage was first noted off Morris Run Rd, just east of Highway|21 in Greene County and approximately 3 miles ESE of Graysville|PA. The tornado primarily affected trees as it moved southeast|between 735 PM and 741 PM. As the tornado crossed Morris Run Rd,|it caused a barn to collapse, with debris blown to the property|across the road. The tornado continued to uproot trees as it|traveled southeast, and it also removed siding from a house.|Several hardwood trees were uprooted as the tornado approached|Scott Run Rd. Additionally, a camper was flipped over adjacent…

9. Jul 29, 2021Tornado$100,000
   National Weather Service narrative

   An EF-1 tornado damaged a rural portion of extreme western Greene|County during the early evening of July 29th. The affected area |was just south of State Gamelands No. 302, in a region of |rough terrain characterized by dense wooded areas, mixed with open|farm land and gas well production infrastructure.||Damage from this tornado was confined to mainly hardwood trees in|the wooded areas. The tornado snapped a number of small trees, |uprooted several larger ones, and downed numerous large branches |over the course of its nearly 3 mile track. The initial damage |occurred at the bridge crossing Enlow Fork on the Pennsylvania |side of the MarkWest Majorsville Station. As the storm…

10. Feb 12, 2009High Wind, Greene$100,000
    National Weather Service narrative

    A powerful cold front moved across the Ohio Valley on the evening of the 11th as strong low pressure moved north across the Great Lakes. A convective line along the cold front produced widespread damage across eastern Ohio, western Pennsylvania, northern West Virginia, and Garrett county Maryland with thunderstorm wind gusts of 60 to 70 MPH and a peak wind gust of 92 MPH at Allegheny County Airport near Pittsburgh. High winds gusting to 60 MPH behind the front in a strong pressure gradient produced wind damage across the entire region into midday on the 12th. In all across eastern Ohio, western Pennsylvania, northern West Virginia and Garrett county Maryland over one half million…

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

102°F2 times, most recently Jul 8, 2012

All-time low

−25°F4 times, most recently Jan 20, 1994

Warmest night

75°FJul 24, 2010

Coldest day

−7°FJan 21, 1985

Wettest day

4.62 inSep 18, 2004

Snowiest day

18.8 inFeb 17, 2003

Hottest year

2024mean 53.7°F

Coldest year

1963mean 47.6°F

Wettest year

201160.92 in

Driest year

196328.07 in

Snowiest season

70.9 in1993-94

Station Waynesburg 1 E (USC00369367), 940 ft elevation, 3.1 miles from the population centre. Daily records from 1948 to October 23, 2026; 97.8% 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 USC00369367.
• 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.