Tioga County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Tioga 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 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 7, 2011Flood$309 million
   National Weather Service narrative

   A record flood occurred on the Susquehanna river at Owego, NY. The crest was recorded by a high water mark survey at 39.62 feet on September 8, 2011 with an estimated time at about 3:00 PM. This flood smashed the previous record flood event by being nearly 4 feet higher.

2. Jun 27, 2006Flash Flood$100 million
   National Weather Service narrative

   Tropical moisture streamed northward into south central New York ahead of a frontal system which slowly moved westward into the eastern Great Lakes by Tuesday morning the 27th. This tropical moisture brought heavy showers and thunderstorms across much of upstate New York Sunday through Tuesday morning. Rainfall by Tuesday morning totaled 1 to 2 inches in Tioga County. This initial rainfall saturated the soils before another round of heavier rain moved into the county Tuesday afternoon as the front moved back east and combined with a low pressure system moving up the eastern seaboard. This scenario spelled disaster for Tioga County. Total rainfall for the three day period ending…

3. Sep 7, 2011Flash Flood$70.0 million
   National Weather Service narrative

   Catastrophic flash flooding occurring in the Owego area. Numerous roads and bridges were severely damaged.

4. Sep 7, 2011Flash Flood$25.0 million
   National Weather Service narrative

   Catastrophic flash flooding occurred in the Apalachian area. Many roads were flooded, with streams flowing in people's yards. Houses, roads and bridges were severely damaged.

5. Sep 7, 2011Flash Flood$20.0 million
   National Weather Service narrative

   Catastrophic flash flooding occurred from Owego Creek and Catatonk Creek|into the Village of Owego and surrounding areas. Numerous roads, bridges and homes were severely damaged.

6. Sep 7, 2011Flood$16.0 million
   National Weather Service narrative

   Record flooding occurred along the Susquehanna River near Waverly, NY between September 7th and September 12th, 2011. The river crested at 26.67 feet at 4:15 PM on September 8th as determined by a USGS high water mark survey. This surpassed the previous record of 22.52 feet set during the June 2006 flood.

7. Sep 7, 2011Flash Flood$15.0 million
   National Weather Service narrative

   Catastrophic flash flooding of roads, bridges and homes occurred in the Newark Valley area. Numerous roads, homes and bridges were severely damaged.

8. Sep 7, 2011Flash Flood$10.0 million
   National Weather Service narrative

   The Engelbert farm which is just east of Lounsberry on East River Road is several feet under water and has been since mid-afternoon. There is significant damage to equipment, buildings and crops. Some livestock were lost in the flash flood.

9. Sep 7, 2011Flash Flood$8.0 million
   National Weather Service narrative

   Catastrophic flash flooding in the Nichols area. Most roads and bridges were severely damaged.

10. Jun 28, 2006Flood$5.0 million
    National Weather Service narrative

    Several neighborhoods in Owego became virtual islands during this flood. The Susquehanna River at Owego rose above the flood stage of 30 feet June 28th at 4:30 AM EDT. Moderate flooding (32 feet) began June 28th, at 7:30 AM EDT. Major flooding (33 feet) began June 28th at 9:30 AM EDT. The crest of 35.85 feet was reached June 29th, at 01:30 AM EDT which set a new record. The old record was 33.18 feet April 3, 2005. The January 20 1996 flood crest was 32.97 feet. The river at Owego remained above flood stage through the end of June.

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

98°FJul 16, 1988

All-time low

−20°FJan 15, 1957

Warmest night

77°FJul 22, 2011

Coldest day

−5°FJan 19, 1994

Wettest day

7.49 inSep 7, 2011

Snowiest day

31.2 inMar 14, 2017

Hottest year

2023mean 49.9°F

Coldest year

1958mean 44.0°F

Wettest year

201168.05 in

Driest year

198130.26 in

Snowiest season

135.2 in2016-17

Station Binghamton (USW00004725), 1,703 ft elevation, 17.0 miles from the population centre. Daily records from 1951 to October 26, 2026; 99.9% 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 USW00004725.
• 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.