Buchanan County
Population 83,540 (2025) 408 sq mi
Property owners in Buchanan County have filed 623 federal flood insurance claims since 1978, 13th most of 115 counties in Missouri.
Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed
- Tornado damage paths since 195023
- Major flood years since 19784
At a glance
The record for Buchanan County in eight numbers. Each links to its section below.
Tornadoes
About one every 3.3 years since 1950, 2 of them rated F3/EF3 or stronger.
Strongest
April 10, 1965
F3, 23.2 mile path
200 yards wide.
Most recent
Monday, May 19, 2025
EF0, 4.3 mile path
Within the past year.
Every recorded tornado
| May 19, 2025 | EF0 | 4.3 | 0 | 0 |
| Mar 29, 2022 | EF1 | 0.3 | 0 | 0 |
| May 25, 2020 | EF0 | 0.0 | 0 | 0 |
| Jun 29, 2014 | EF0 | 0.2 | 0 | 0 |
| Apr 10, 2008 | EF0 | 0.3 | 0 | 0 |
| Jun 4, 2005 | F0 | 7.5 | 0 | 0 |
| May 29, 2004 | F0 | 0.2 | 0 | 0 |
| May 29, 2004 | F3 | 7.0 | 0 | 0 |
| Sep 20, 2001 | F0 | 0.1 | 0 | 0 |
| Sep 20, 2001 | F0 | 0.1 | 0 | 0 |
| Sep 20, 2001 | F0 | 0.1 | 0 | 0 |
| Sep 20, 2001 | F0 | 0.1 | 0 | 0 |
| May 30, 1985 | F1 | 15.6 | 5 | 0 |
| Nov 29, 1975 | F1 | 3.0 | 0 | 0 |
| Jun 16, 1973 | F2 | 6.0 | 14 | 0 |
| May 18, 1971 | F2 | 55.4 | 6 | 0 |
| Jul 26, 1969 | F2 | 0.1 | 0 | 0 |
| Jan 24, 1967 | F2 | 6.1 | 0 | 0 |
| Apr 10, 1965 | F3 | 23.2 | 11 | 0 |
| Jun 22, 1964 | F1 | 1.0 | 0 | 0 |
| May 31, 1962 | F1 | 0.1 | 0 | 0 |
| Jun 29, 1960 | F2 | 25.1 | 0 | 0 |
| Apr 28, 1956 | F1 | 2.0 | 0 | 0 |
- Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Buchanan County: 0.
- 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.
Hurricanes and tropical storms
No tropical storm or hurricane has tracked within 100 miles since records began in 1851.
Wildfire and smoke
No large wildfire has been mapped here since satellite mapping began in 1984.
Smoke overhead
Smokiest year
2023: 66 days
Heavy smoke on 22 days in 2021, the most of any year.
Last 10 years
25.9 days a year
Medium or heavy smoke, 2016 to 2025.
2025
19 days
Medium or heavy smoke. 36 so far in 2026.
- 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.
Floods and flood insurance
623 federal flood insurance claims since 1978, with $22.9 million paid.
Most claims in one year
1993: 135 claims
$3.1 million paid.
2nd most
2011: 133 claims
$9.7 million paid.
3rd most
2019: 122 claims
$6.6 million paid.
Claims by ZIP code
| 64484 | 318 | $12.6 million |
| 64504 | 105 | $2.9 million |
| 64505 | 68 | $5.2 million |
| 64501 | 50 | $963,000 |
| 64503 | 25 | $76,000 |
| 64507 | 23 | $250,000 |
| 64506 | 15 | $288,000 |
| 64401 | 13 | $529,000 |
Flood events since 1996
- Flood99
- Flash Flood22
1 death recorded in flood events since 1996.
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
Most severe crest
July 25, 1993
Platte River near Agency, 36.07 ft
16.07 feet above the 20.0 ft flood stage; major flooding by today’s categories.
Most recent moderate or major crest
June 13, 2026
Platte River near Agency, 25.82 ft
Moderate flooding.
River gauges
| Missouri River at St. Joseph | 17.0 | 32.07 ft | 4 |
| Platte River near Agency | 20.0 | 36.07 ft | 7 |
- 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.
Drought
In severe drought or worse for 141 of 1,581 months since 1895 (9%); the longest spell lasted 20 months.
141
Months in severe drought or worse since 1895
72
Months in extreme drought
9%
Share of all months, severe or worse
18
Drought reports to the Weather Service since 1996
Lowest reading
October 1956
−6.37, extreme drought
Longest severe spell
20 months
January 1956 to August 1957.
Latest month
September 2026
+1.08, slightly wet
Last severe month: September 2018.
- 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.
Earthquakes
5 earthquakes of magnitude 2.5 or more within 50 miles since 1931; none reached magnitude 4.
1
Magnitude 2.5+ inside the county since 1973
3
Magnitude 3+ within 50 miles since 1973
0
Magnitude 4+ within 50 miles since 1900
0
Magnitude 5+ within 50 miles since 1900
Largest within 50 miles
August 9, 1931
Magnitude 3.8
6 km WSW of Kansas City, Kansas; 30.2 miles away.
Most recent, magnitude 3 or more
March 23, 2007
Magnitude 3.1
5 km N of Nortonville, Kansas; 13.6 miles away.
- 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).
- 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.
Severe weather and other events
678 events in the National Weather Service record, 538 of them since 1996.
110
Hail reports, 1 inch or larger
8
Hail, 2 inches or larger
215
Damaging gusts, 58 mph+
44
Winter weather events since 1996
16
Heat events since 1996
11
Cold events since 1996
Largest hail
September 16, 1978
2.75 inches
Strongest measured or estimated gust
June 29, 1998
92 mph
Costliest events since 1996
- Jul 26, 2000Thunderstorm Wind$1.0 million
National Weather Service narrative
The highway department reported downed trees up to 4 feet in diameter, and a tree blown down onto a car. A 90-foot flagpole was broken. A building under construction in an industrial park sustained over $1 million in damage.
- Oct 4, 1998Flash Flood$500,000
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…
- Jun 4, 2005Tornado$300,000
National Weather Service narrative
F0 tornado crossed into Missouri near the Pony Express Bridge. The tornado produced a skipping path through northwest and north portions of St. Joseph. Numerous trees were damaged or uprooted. A few homes also lost their porches. Most damage to homes was caused by falling trees and tree limbs. The tornado exited into Andrew county 2 miles east of I-29 along U.S.Highway 169.
- Mar 13, 2019Flood$100,000
National Weather Service narrative
Once the Missouri River started flooding on March 9, it remained in flood through the remainder of the month. The gauge in St. Joseph, Missouri reached 32.12 feet on March 22 (preliminarily a new record). The flooding was caused by several rounds of heavy snow across the Northern Plains through the winter months, followed by a rapid warm-up and several days of heavy rain. The Missouri River Basin across the Northern Plains flooded with catastrophic consequences as numerous dams and levees failed. As the water flowed into the Missouri River upstream of Buchanan County, the river swelled and ultimately overwhelmed the levees along the river. About 1,500 residents and 6,000 employees…
- Apr 10, 2008Tornado$70,000
National Weather Service narrative
Brief EF0 tornado touchdown at 1930 CST in the southern portion of Saint Joseph. Several buildings were damaged before the tornado lifted at 1932 CST. One injury was reported as well.
- May 6, 2007Flood$50,000
National Weather Service narrative
The Missouri River at Saint Joseph crested at 25.26 feet, or 8.26 feet above flood stage.
- Jun 29, 1998Thunderstorm Wind$50,000
National Weather Service narrative
The Buchanan County Sheriff's Office reported damage to the roof of a school in De Kalb as a result of severe thunderstorm winds. Thunderstorm winds also blew a semi tractor trailer off the road along Highway 59 in South St. Joseph. There was also the report of structural damage to a home in South St. Joseph as a result of the strong winds. St. Joseph Power and Light reported that four main transmission line structures were destroyed in the storm resulting in a power loss for many customers for over 24 hours. Two barns were destroyed between De Kalb and Taos, and several other outbuildings were damaged.
- Jun 19, 2010Thunderstorm Wind$40,000
National Weather Service narrative
Roofs were blown off several trailer roofs. The debris was strewn from southwest to northeast. An unstrapped trailer home was blown off its blocks and rolled. One to two foot diamater trees were blown down. Based on the EF kit, winds were estimated up to 89 mph.
- May 6, 2002Thunderstorm Wind$30,000
National Weather Service narrative
200 foot cell telephone tower blown over.
- Jun 8, 2008Thunderstorm Wind$25,000
National Weather Service narrative
Numerous reports of tree damage. Tree was reported down on a house at the 800 block of Main Street. Another tree also fell on a truck.
- 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.
Weather records
From St. Joseph Rosecrans Mem Airport, 4.9 miles from the county’s population centre, with records from 1948.
- All-time high
- 107°F2 times, most recently Jul 30, 1980
- All-time low
- −25°FJan 12, 1974
- Warmest night
- 87°FJul 27, 1970
- Coldest day
- −4°FJan 14, 2024
- Wettest day
- 4.74 inSep 13, 2016
- Snowiest day
- 8.5 inMar 2, 1978
- Hottest year
- 2024mean 57.2°F
- Coldest year
- 1979mean 50.3°F
- Wettest year
- 197355.60 in
- Driest year
- 201119.46 in
Station St. Joseph Rosecrans Mem Airport (USW00013993), 807 ft elevation, 4.9 miles from the population centre. Daily records from 1948 to October 26, 2026; 98.6% 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.
Federal disaster declarations
28 since 1953. The most recent: Severe Storms, Straight-Line Winds, Tornadoes, and Flooding, September 1, 2021.
| Sep 1, 2021 | Severe Storm | DR-4612-MO |
| Mar 26, 2020 | Biological | DR-4490-MO |
| Mar 13, 2020 | Biological | EM-3482-MO |
| Jul 9, 2019 | Severe Storm | DR-4451-MO |
| May 20, 2019 | Flood | DR-4435-MO |
| Aug 7, 2015 | Severe Storm | DR-4238-MO |
| Aug 12, 2011 | Flood | DR-4012-MO |
| Jun 30, 2011 | Flood | EM-3325-MO |
| Mar 23, 2011 | Severe Storm | DR-1961-MO |
| Feb 3, 2011 | Severe Storm | EM-3317-MO |
| Aug 17, 2010 | Severe Storm | DR-1934-MO |
| Jan 30, 2009 | Severe Ice Storm | EM-3303-MO |
| Jun 25, 2008 | Severe Storm | DR-1773-MO |
| Dec 27, 2007 | Severe Ice Storm | DR-1736-MO |
| Dec 12, 2007 | Severe Ice Storm | EM-3281-MO |
| Jun 11, 2007 | Severe Storm | DR-1708-MO |
| Sep 10, 2005 | Hurricane | EM-3232-MO |
| Jun 11, 2004 | Severe Storm | DR-1524-MO |
| May 6, 2003 | Severe Storm | DR-1463-MO |
| Feb 6, 2002 | Severe Ice Storm | DR-1403-MO |
| Jul 9, 1993 | Flood | DR-995-MO |
| Jun 21, 1984 | Flood | DR-713-MO |
| Sep 14, 1977 | Flood | DR-538-MO |
| Sep 24, 1976 | Drought | EM-3017-MO |
| Jun 10, 1974 | Flood | DR-439-MO |
| Nov 1, 1973 | Flood | DR-407-MO |
| Apr 19, 1973 | Severe Storm | DR-372-MO |
| Jul 27, 1965 | Flood | DR-203-MO |
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.
How this compares
Where Buchanan County stands among 115 counties in Missouri and 3,143 in the United States.
| Tornadoes since 1950 | 23 | 66 / 115 |
| Tornadoes rated F3/EF3 or stronger | 2 | 47 / 115 |
| Tropical cyclones within 50 mi | 0 | — |
| Hurricane-strength passes within 50 mi | 0 | — |
| Wildfire acres since 1984 | 0 | — |
| Flood insurance claims | 623 | 13 / 115 |
| Flood insurance paid | $22.9 million | 8 / 115 |
| Disaster declarations | 28 | 18 / 115 |
| Flood events since 1996 | 121 | 39 / 115 |
| Hail and wind events since 1996 | 315 | 38 / 115 |
| Winter storm events since 1996 | 44 | 97 / 115 |
| Reported damage since 1996 | $2.3 million | 81 / 115 |
| River crests at major flood stage | 11 | 19 / 115 |
| High tide flooding days a year, last 10 years | 0.0 | — |
| Months in severe drought since 1895 | 141 | 26 / 115 |
| Medium or heavy smoke days a year, last 10 years | 25.9 | 8 / 115 |
| Earthquakes M4+ within 50 mi since 1900 | 0 | — |
| Earthquakes M2.5+ in the county since 1973 | 1 | 26 / 115 |
Neighbouring counties
| Andrew County | 25 | 0 |
| Atchison County KS | 22 | 0 |
| Clinton County | 26 | 0 |
| DeKalb County | 21 | 0 |
| Doniphan County KS | 21 | 0 |
| Platte County | 17 | 0 |
Sources and vintage
Every number on this page comes from these public records.
- 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 USW00013993.
- 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.