Troy

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
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.

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.

Flood insurance figures are for Miami County, the county that contains Troy.

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 in Miami County, the county that contains Troy.

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.

The drought index is for Miami County, the county that contains Troy.

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 city centre.
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.

More event types since 1996

Costliest events since 1996

1. Sep 14, 2008High Wind, Miami$12.0 million
   National Weather Service narrative

   Strong winds of 40 to 50 miles per hour were sustained for several hours. 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.

2. May 27, 2019Tornado$10.0 million
   National Weather Service narrative

   The tornado initially touched down in Darke County at 2125EST, about a mile southeast if Pitsburg. It moved east and entered Miami County at 2128EST along Hall Road, about a half mile northwest of Potsdam. ||As the tornado entered Miami County, significant tree damage occurred on State Route 721 south of Laura. Structural damage began to occur near the intersection of Wright Road and Markley Road, with partial roof loss to an outbuilding. On Ditmer Road and South Shiloh Road, nearly every property sustained tree damage, some of which was significant.||As the tornado neared State Route 571, structural damage became much more severe. Several homes on State Route 571 between South…

3. May 21, 2014Flash Flood$1.3 million
   National Weather Service narrative

   Water rescues were being performed across the county, but especially in the Troy and Tipp City areas for people being trapped in cars stranded by flash flooding. The flash flooding was caused by heavy rainfall.

4. Jun 8, 2022Tornado$1.0 million
   National Weather Service narrative

   The tornado touched down west of West Milton in open farmland and was only loosely in contact with the ground as it traveled east through West Milton. Only minor tree damage was seen for the first few miles of the track, with the vast majority of the tree damage being broken limbs and a few uprooted trees.||As the tornado moved through the Nashville area and toward Tipp City, it began to strengthen and caused EF-1 category wind damage to trees, power poles, and residences along West Kessler Cowlesville Road, especially near its intersection with Peters Road.||As the tornado approached Interstate 75, it strengthened further and directly hit several large industrial warehouse…

5. Mar 14, 2024Tornado$750,000
   National Weather Service narrative

   The tornado developed at 1850EST in Randolph County, Indiana, just south of Farmland. The tornado traveled east across Randolph County, Indiana, and Darke County, Ohio, and entered Miami County at 1952EST, along State Route 721, just north of Grandview Drive. The tornado reached EF-2 intensity with winds of up to 120 mph near the intersection of Klinger and Rangeline Roads. Two homes had a significant amount of roof and some external wall removal while other nearby properties had outbuildings that were severely damaged.||The last damage was noted along State Route 48 near the intersection with Klinger Road. The tornado is believed to have dissipated near this location at 2000EST.

6. Jan 11, 2020Tornado$500,000
   National Weather Service narrative

   The tornado touched down initially in the southwest portions of the city of Troy and moved northeast through the center of the city. It then crossed the Great Miami River before it weakened and lifted in the far northeast portions of the city.||Much of the damage was confined to trees and roofs, both residential and commercial, as the tornado moved through the city. To the west of the Great Miami River, damage was more intermittent and weak in comparison to areas east of the Great Miami River, where more concentrated and significant tree and roof damage was noted. In particular, areas near Troy High School and along and east of North Market Street saw the most concentrated and…

7. Jan 6, 1996Winter Storm, Miami$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…

8. Sep 4, 2011Thunderstorm Wind$250,000
   National Weather Service narrative

   Numerous large trees were sheared or uprooted. Nineteen loaded trailers were overturned and two air conditioning units were blown off a roof at a distribution center. Eight wooden high voltage electric poles were snapped. Another semi trailer was overturned on a highway. These occurrences were due to damaging thunderstorm winds.

9. Apr 9, 1999Tornado$250,000
   National Weather Service narrative

   The tornado pushed cars off of the road, peeled siding from houses, downed several trees, damaged storage buildings and destroyed several campers and RV's on a sales lot.

10. Apr 1, 2023Tornado$200,000
    National Weather Service narrative

    The tornado first touched down near Pemberton Road, where it caused significant damage to a barn and a garage on Penny Road. The tornado continued east-northeast and moved through a commercial area on State Route 41 and then caused roof damage to several homes on the north side of Troy. Consistent damage continued to as far east as Deweese Road. Reports and photo evidence from numerous citizens in the area, in addition to emergency management officials, helped determine the extent of this tornado. Maximum winds were estimated to be around 85 mph.

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°F7 times, most recently Jul 7, 2012

All-time low

−25°F2 times, most recently Jan 19, 1994

Warmest night

80°FJul 16, 1988

Coldest day

−11°FJan 20, 1985

Wettest day

4.16 inJan 21, 1959

Snowiest day

12.4 inJan 25, 2026

Hottest year

2024mean 56.9°F

Coldest year

1958mean 49.9°F

Wettest year

199059.75 in

Driest year

196324.21 in

Snowiest season

62.7 in1977-78

Station Dayton International Airport (USW00093815), 993 ft elevation, 9.3 miles from the city centre. Daily records from 1948 to October 27, 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.

Declarations for Miami County.

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.

• 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 USW00093815.
• 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.