Fallon County

Every recorded tornado

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

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.

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.

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 ND GS (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.

Costliest events since 1996

1. Jun 11, 2016Tornado$1.5 million
   National Weather Service narrative

   The pre-storm environment for eastern Montana was such that severe weather was likely. Surface dew point values in the Baker area were in the lower 60s with strong southeasterly flow converging in the vicinity of a stationary surface trough. This area of strong surface convergence, which also separated moist rich air to the east and drier air to the west, played a critical role in the development of this short-lived tornado. ||Although no fatalities occurred , seven injuries, some requiring hospitalization, resulted from the tornado. Two homes were totally destroyed and 40 to 50 more sustained excessive damage. The city blocks located between South 5th Street East and South 10th…

2. Jul 10, 2016Hail$1.0 million
   National Weather Service narrative

   Hail up to 2 inches in diameter along with 50 to 60 mph winds occurred at the Baker Airport. The hail was still two to three inches deep on the ground after the storm. Multiple hangers were damaged by the hail and wind. Several hangers received broken window damage. In addition, several vehicles at the airport were severely damaged with some windows of vehicles completely broken. A few of the vehicles were considered total losses.

3. May 20, 2011Flood$375,000
   National Weather Service narrative

   Significant small stream flooding across much of Fallon County. Numerous roads closed and eventually washed out with additional damage reported to several bridges. Water breached a small dam and a couple private holding ponds in the region. Significant erosion threatened the Waste Water Treatment Plant in Baker. Significant flooding reported on O'Fallon Creek where one spotter reported the highest levels on the stream in at least 58 years with over a foot of water covering much of their farmland. At the Boxelder and Horse Creek confluence, flood waters rushed over dikes and into hayfields. Floodwaters surrounded one house in that region. Damage estimates based on FEMA reviews and…

4. Jul 4, 2000Thunderstorm Wind$2,000
5. Jul 27, 2000Thunderstorm Wind$1,000
   National Weather Service narrative

   Spotter northeast of Baker reported 4 inch diameter hail and 60+ mph winds. Backyard and frontyard flooded.

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

111°FJul 6, 1936

All-time low

−52°FJan 12, 1916

Warmest night

86°FJul 27, 1917

Coldest day

−23°FFeb 1, 1917

Wettest day

3.12 inMay 1, 2008

Snowiest day

15.3 inApr 19, 2006

Hottest year

1934mean 47.6°F

Coldest year

1951mean 37.9°F

Wettest year

191521.18 in

Driest year

19886.15 in

Snowiest season

73.8 in1932-33

Station Plevna (USC00246601), 2,780 ft elevation, 10.3 miles from the population centre. Daily records from 1910 to October 26, 2026; 98.3% 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 USC00246601.
• 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.