Warren County

Every recorded tornado

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

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 MO DNR (12).

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 12, 2007Ice Storm, Warren$96,000
   National Weather Service narrative

   An arctic boundary settled south of the area on the 12th and 13th of January bringing subfreezing temperatures to the northwestern half of the county warning area. Three rounds of precipitation occurred during this period, with the first being the most destructive of all. Significant tree and limb damage was reported as a result of this storm, together with widespread power outages. More than 100,000 homes and businesses lost power during this storm. About 1.5 inches of sleet fell and a 1/2 inch of ice accumulation hit parts of Central and Northeast Missouri. From 1/4 to 1/2 inch of ice accumulated from freezing rain across Eastern Missouri and parts of Southwest Illinois.…

2. Aug 12, 2021Thunderstorm Wind$30,000
   National Weather Service narrative

   Thunderstorm winds peeled off a portion of a flat roof on Daniel Boone Elementary School in the Warren County R-III School District.

3. Jul 26, 2022Flash Flood$25,000
   National Weather Service narrative

   Up to 10 inches of rain fell in a 6 to 10 hour period causing flash flooding. Numerous roads were flooded including Highway A at the intersection with Highway W, Morsey Center Road about half a mile east of Highway A, and State Highway 47 just south of Powerline Road. Culvert was washed away on Pin Oak Church Road just east of y intersection near New Truxton Road, making the road impassable.

4. Apr 10, 2001Tornado$20,000
   National Weather Service narrative

   A small tornado formed briefly just west of Wright City. One mobile home on a sales lot was overturned.

5. Jul 9, 2021Thunderstorm Wind$15,000
   National Weather Service narrative

   A swath of wind damage across portions of Warren County. Several manufactured homes sustained minor damage to underpinning, tie downs and supports, about 3 miles north northeast of Warrenton. In Warrenton, a large sign near a shopping center was damaged. Several trees were blown down in and around Warrenton, one of which was about 3 feet in diameter. Just southwest of Wright City, a tree was topped and a small shed was moved several feet.

6. Aug 3, 2022Thunderstorm Wind$5,000
   National Weather Service narrative

   Thunderstorm winds blew down several large trees onto Highway 94 just west of Marthasville.

7. Sep 4, 2023Thunderstorm Wind$3,000
   National Weather Service narrative

   One cell amidst a group of disorganized convection produced wind gusts strong enough to bring down multiple power poles along I-70 very near the Montgomery and Warren county line.

8. Aug 8, 2021Thunderstorm Wind$2,000
   National Weather Service narrative

   Thunderstorm winds blew down several power lines between Hopewell and Marthasville.

9. Dec 9, 2009Strong Wind, Warren$1,000
   National Weather Service narrative

   An intense low pressure moved across the region into the Great Lakes. On December 9, very strong winds developed across Central and Eastern Missouri. Wind gusts of 40 to 50 mph were common across the area.

10. Apr 13, 1998Tornado$500
    National Weather Service narrative

    A weak tornado tracked from just east of Warrenton in Warren County to Lake St. Louis in St. Charles County. The tornado was spotted several times along the path by severe storm spotters, intermittently touching down but causing very little damage. The only reported damage of note was to the garage doors at the truck weigh station along Interstate 70 in Foristell.

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

109°FAug 18, 2000

All-time low

−28°FDec 23, 1989

Warmest night

81°FJul 26, 2012

Coldest day

−2°FJan 24, 1963

Wettest day

6.39 inDec 27, 2015

Snowiest day

14.0 inFeb 27, 1984

Hottest year

2012mean 58.3°F

Coldest year

1958mean 52.5°F

Wettest year

200862.75 in

Driest year

197622.13 in

Snowiest season

39.2 in1959-60

Station Weldon Spring NWS (USC00238805), 610 ft elevation, 23.3 miles from the population centre. Daily records from 1957 to October 27, 2026; 97.9% 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 USC00238805.
• 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.