Grain Valley

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 Jackson County, the county that contains Grain Valley.

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 Jackson County, the county that contains Grain Valley.

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 Jackson County, the county that contains Grain Valley.

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 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.

Mapped landslides

Landslides mapped in Jackson County.

Mapped by NASA (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. Oct 4, 1998Flash Flood$20.0 million
   National Weather Service narrative

   Thunderstorms containing very heavy rainfall over West Central Missouri on October 4th resulted in several episodes of major flash flooding. The most deadly and costly flooding occurred in Jackson County where nine people lost their lives on the evening of October 4th. The Kansas City metropolitan area experienced the worst of the flooding which was similar in historical context as the devastating flash flood in September 1977. Several episodes of heavy rain producing thunderstorms commenced on the morning of October 4th and continued into early afternoon. In Lee's Summit, up to 10 people had to be rescued from a flooded apartment complex and the depth of the water on 3rd St…

2. Jan 30, 2002Ice Storm, Jackson$15.0 million
   National Weather Service narrative

   A long-lived major ice and snow storm blasted much of northwest, northern and central Missouri from late Tuesday, January 29th, until Thursday, January 31st. Ice accumulations of over an inch were observed from the Kansas City metropolitan area, east and north through Moberly Missouri. At one point 409,504 total customers were without electrical power in the CWA, with some residents without power up to two weeks. For the Kansas City area, the ice storm was ranked as the worst ever. Further north across northern Missouri, heavy snow fell generally along and north of a line, from St. Joseph to Trenton to Kirksville. Snow accumulations ranged from 8 to 14 inches.

3. May 26, 1996Thunderstorm Wind$10.0 million
   National Weather Service narrative

   A downburst during a severe thunderstorm produced a 120 MPH wind gust over the Raintree Lake section of Lee's Summit. One hundred homes were damaged and 13 destroyed resulting in 10 million dollars worth of damage. Nine injuries were reported but none were serious. Winds on top of Lee's Summit hospital were clocked at 79 MPH during the storm.

4. Apr 3, 2011Hail$7.0 million
   National Weather Service narrative

   This hail event, left over a thousand homes in Lee's Summit with various degrees of hail damage. Damage included roofs, gutters, and siding. Automobiles at area dealerships and private automobiles also suffered numerous reports of damage.

5. Mar 12, 2006Hail$1.0 million
   National Weather Service narrative

   Numerous cars at local car dealerships suffered hail damage. There were also many homes with roof damage from the hail.

6. Jun 4, 2005Thunderstorm Wind$1.0 million
   National Weather Service narrative

   Significant wind damage along Douglas and Lees Summit roads. Trees down, hangar damage at airport with 9 planes damaged, and significant damage at hospital construction site.

7. Aug 27, 2004Flash Flood$1.0 million
   National Weather Service narrative

   The most significant flooding since 1998 in the downtown area as 4 to 6 inches of rain falls across the area. Numerous water rescues and homes and businesses flooded.

8. Sep 18, 2010Hail$1.0 million
   National Weather Service narrative

   Hail up to five and a half inches in diameter, was reported in the Independence Mall area. Skylights were shattered at the mall, with numerous vehicles in the parking lot suffering extensive hail damage. There was also hail damage, to vehicles at nearby auto dealerships.

9. Feb 15, 2019Winter Weather, Jackson$1.0 million
   National Weather Service narrative

   After a couple hours of moderate to heavy snow, around 3 to 4 inches accumulated on local roads, including I-70 just east of Kansas City. The slick roads and highly reduced visibility caused a massive pile up at the Oak Grove exit on WB I-70. Several injuries occurred in this accident and one fatality occurred in the carnage that ensued. The pile up received high profile coverage on national media as a trucker caught up in the wreck took video from inside his cab. That video can be found at the following link. ||https://twitter.com/Dantej21/status/1096550488714170368 .

10. May 2, 2008Thunderstorm Wind$1.0 million
    National Weather Service narrative

    Extensive damage to a business near Highway 291 and 23rd Street. Also power poles and lines were downed. Fifty three homes suffered minor to major damage, mainly to roofs and windows.

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

113°FAug 14, 1936

All-time low

−19°FDec 22, 1989

Warmest night

89°FJul 10, 1980

Coldest day

−4°FDec 22, 1989

Wettest day

7.45 inAug 15, 1969

Snowiest day

11.8 inJan 18, 1962

Hottest year

2012mean 61.2°F

Coldest year

1951mean 53.5°F

Wettest year

196160.25 in

Driest year

198819.17 in

Station Kansas City Dwtn Airport (USW00013988), 742 ft elevation, 21.5 miles from the city centre. Daily records from 1934 to October 27, 2026; 98.9% 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 Jackson 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 USW00013988.
• 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.