Clark County

Every recorded tornado

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

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.

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.

More event types since 1996

Costliest events since 1996

1. Jun 26, 2013Flash Flood$2.0 million
   National Weather Service narrative

   Periods of showers and thunderstorms which produced up to 4.00 inches of rain from June 25th into the morning of June 26th saturated the ground and swelled area creeks in northern Clark County. A round of thunderstorms during the afternoon of June 26th rapidly produced an additional 3.00 to 5.00 inches of rain resulting in widespread flash flooding. Most roads were flooded in the northern part of the county, and one road washed out about 5 miles north of Marshall. U.S. Highway 40 and State Route 1 were closed at times. Several homes and businesses in the city of Marshall suffered flood damage. The widespread flooding did not subside until late in the morning on June 27th.

2. Feb 1, 2011Winter Storm, Clark$700,000
   National Weather Service narrative

   Weather observers across Clark County measured 1 to 2 inches of sleet along with 2 inches of snow and around one half an inch of ice. The glaze of ice caused power outages around the county, while snow-covered and icy roads resulted in numerous traffic accidents.

3. Jun 6, 2008Flood$500,000
   National Weather Service narrative

   Copious amounts of rain, ranging from 9 to 11 inches fell across Clark County, mainly on June 6th. Nearly 100 homes were damaged by the flooding, and every county road was under water. Interstate 70 was closed from late in the evening on the 6th through much of the day on the 7th due to the flooding. Clark County was declared a disaster area due to the extensive flooding.

4. Jun 1, 1999Tornado$350,000
   National Weather Service narrative

   A tornado touched down 4 miles southeast of Westfield. It destroyed 3 machine sheds, a barn, and several trees. The nearby house did not sustain any damage. As it travelled to the northeast, another farm was hit. Two sheds, a brooder house, and half a barn were destroyed. The house sustained major damage with a large hole in the roof and almost every window was shattered. Debris was found up to two miles away. The house was shifted on its foundation which caused the concrete porch to split in half. A 2x4 flew through the house and was embedded into a wall. The tornado then lifted and dissipated 3 miles west of Clarksville. No injuries were reported and damage was estimated around $350,000.

5. Jun 4, 2014Thunderstorm Wind$100,000
   National Weather Service narrative

   Numerous tree branches and power lines were blown down, causing a power outage to much of the town for several hours. A few 8 to 10-inch diameter trees were uprooted.

6. May 10, 2017Thunderstorm Wind$75,000
   National Weather Service narrative

   Numerous tree limbs and power lines were blown down across Marshall. An awning was damaged.

7. Apr 8, 2020Thunderstorm Wind$50,000
   National Weather Service narrative

   Several utility poles were damaged on 1000th St between Highway 40 and 1200th Road.

8. May 15, 2018Thunderstorm Wind$42,000
   National Weather Service narrative

   Several power poles were blown down along IL-49 south of Westfield.

9. Aug 16, 2012Thunderstorm Wind$40,000
   National Weather Service narrative

   Numerous trees were blown down, including a 20-inch diameter tree that fell onto power lines. Power was knocked out throughout Martinsville.

10. May 15, 2018Thunderstorm Wind$35,000
    National Weather Service narrative

    Three semis were blown over on I-70 northeast of Martinsville.

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

106°F5 times, most recently Jul 7, 2012

All-time low

−17°FJan 31, 2004

Warmest night

81°F2 times, most recently Jun 14, 2022

Coldest day

2°FJan 1, 2018

Wettest day

5.71 inMay 12, 2002

Hottest year

2012mean 57.4°F

Coldest year

2014mean 50.7°F

Wettest year

201151.63 in

Driest year

201228.45 in

Station Terre Haute Hulman Regional Airport (USW00003868), 567 ft elevation, 26.1 miles from the population centre. Daily records from 1961 to October 23, 2026; 94.8% 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 USW00003868.
• 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.