Johnson County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Johnson County: 4.
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.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

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.

Mapped landslides

Mapped by NASA (2).

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. Jan 26, 2009Ice Storm, Johnson$25.0 million
   National Weather Service narrative

   The sheriff's office reported 1 inch of ice across the county by 6:00 AM on the 27th. Trees and power lines were down across the county. A few residences had significant damage.

2. May 24, 2011Tornado$13.0 million
   National Weather Service narrative

   This tornado moved through Clarksville, causing extensive damage at the country club and to businesses and residences on the south and east sides of town. Initially, the entire city of Clarksville was without electricity. About 70% of electric customers had power restored by the end of the day on the 25th, but the hardest-hit areas lacked power for a week. In Clarksville, the tornado took a similar path to that of a tornado which occurred on April 7, 1980. After leaving Clarksville, the tornado moved off to the northeast passing between Strawberry and Chronister Store. A 65 year-old man was killed in the area of the Strawberry community when the tornado destroyed a small house on…

3. May 24, 2011Tornado$5.5 million
   National Weather Service narrative

   This is the sixth and final segment of a six-segment tornado. (The first, third, and fifth segments occurred in Franklin County in the Tulsa County Warning Area.) The tornado moved out of Franklin County north of Alix and entered Johnson County northwest of Coal Hill. In Johnson County, the tornado first moved through the Centerpoint community, knocking down trees in the cemetery and badly damaging several residences. The tornado next moved on to the Bethlehem community, where several mobile homes were destroyed and some additional residences were damaged. A 31 year-old woman in one of the mobile homes was killed and approximately 11 other people were injured. The tornado next…

4. Oct 29, 2009Flash Flood$2.0 million
   National Weather Service narrative

   Flooding on Spadra Creek and Horsehead Creek caused roads to be flooded and culverts washed out. Numerous streets were flooded in Clarksville, as was U.S. Highway 64 around Hartman and Coal Hill. Around 9:20 PM CDT, a washout on a railroad track caused a train derailment in the Coal Hill Bottoms, south of Coal Hill. Nineteen hopper cars carrying soybeans were derailed, spilling the beans and tearing up a section of track. Mudslides occurred on Interstate 40 southwest of Hunt, on Arkansas Highway 103 in the Batson Mountain vicinity, and on a road north of Catalpa. Eight houses were flooded in the western part of the county. Cattle had to be rescued from flooding at the Dirty Creek…

5. Dec 5, 2013Winter Storm, Johnson$1.3 million
   National Weather Service narrative

   Snow and sleet totaled 5.3 inches at Clarksville (social media), 4 inches 6 miles northeast of Clarksville (cooperative observer), and 3.2 inches 5.7 miles north-northeast of Lamar (CoCoRaHS). An ice storm occurred in the northern part of the county, knocking down trees and power lines (utility company).

6. Jun 12, 2009Thunderstorm Wind$500,000
   National Weather Service narrative

   Numerous trees were blown down, some of which fell on houses. Numerous power lines were blown down, and some power poles were snapped. Business signs were blown down. The roof was blown off a business, and some lumber sheds were damaged at a lumber yard. Shingles were blown off houses.

7. Aug 30, 2012Tropical Depression, Johnson$500,000
   National Weather Service narrative

   Although Isaac was a hurricane in the Gulf of Mexico, it had weakened to a tropical depression by the time it reached Arkansas. Isaac passed through western Arkansas on the evening of the 30th and during the day on the 31st. Positions from the National Hurricane Center and the Hydrometeorological Prediction Center: August 30th at 10 PM (CDT) 95 miles south-southwest of Little Rock, August 31st at 4 AM 95 miles west of Little Rock, August 31st at 10 AM 25 miles northeast of Fort Smith, and August 31st at 4 PM 40 miles east of Joplin, Missouri. Although Isaac had exited Arkansas by the end of the month, some effects, including bands of thunderstorms spiraling in toward its center,…

8. Sep 13, 2008Tropical Storm, Johnson$375,000
   National Weather Service narrative

   Tropical Storm Ike moved into Arkansas on the evening of the 13th. By mid evening of the 13th, Ike was located in western Arkansas. Ike weakened to a tropical depression during the wee hours of the 14th, when it was located about 105 miles west-northwest of Little Rock. Ike exited northern Arkansas before sunrise on the 14th. In the Little Rock County Warning Area, wind gusts of 35 to 45 mph were common, and some gusts in the northern part of the state exceeded 50 mph. The strongest gusts measured were 67 mph at the Izard County Fairgrounds in Melbourne and 61 mph at the Newport airport. The strongest sustained wind measured was 46 mph at the Newport airport. Power was knocked out…

9. May 1, 2011Flood$250,000
   National Weather Service narrative

   Areal flooding was widespread in Arkansas, beginning early in May. The flooding was caused by large amounts of rain on April 30th, and May 1st and 2nd; high water flowing down from Missouri; and backwater flooding from rivers and large creeks and bayous. The Mississippi River was also experiencing unusually high stages, causing the White and Arkansas Rivers to back up near the rivers' confluence. Arkansas Farm Bureau estimated that more than 1 million acres of farmland were under water in the state. The flooding lasted well into May in many counties, and even into June in some of the counties in eastern Arkansas.

10. Apr 26, 2011Flood$250,000
    National Weather Service narrative

    From the 24th through the 27th, the arrival of a slow-moving cold front and several low pressure areas aloft triggered several rounds of thunderstorms. Tornadoes, severe storms, and flash flooding resulted. Widespread areal flooding followed the flash flooding. Some of this flooding was due to heavy rain, while some of it was caused by water from rivers, creeks, and bayous backing up onto the land. On the evening of the 25th, devastating tornadoes affected several areas in central Arkansas. More than 140,000 electric customers in Arkansas lost power. Heavy rains during this period were the beginning of the Great Flood of 2011 in Arkansas. Much of the flooding lasted well into May,…

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

117°FAug 10, 1936

All-time low

−17°FFeb 12, 1899

Warmest night

90°FJul 10, 1944

Coldest day

9°F2 times, most recently Jan 12, 1918

Wettest day

7.36 inSep 22, 2025

Snowiest day

24.0 inFeb 19, 1921

Hottest year

1927mean 65.8°F

Coldest year

2014mean 57.8°F

Wettest year

201969.51 in

Driest year

196324.17 in

Station Subiaco (USC00036928), 500 ft elevation, 15.1 miles from the population centre. Daily records from 1897 to October 27, 2026; 98.7% 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 USC00036928.
• 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.