Meriwether County

Population 21,516 (2025) 501 sq mi

Meriwether County has recorded 30 tornadoes since 1950, 11th most of 159 counties in Georgia; the most recent was on December 29, 2024.

Hazard fingerprint for Meriwether County Tornado: 75th percentile. Tropical: 49th percentile. Wildfire: 0th percentile. Flood: 22th percentile. Hail & wind: 35th percentile. Heat: 56th percentile. Cold: 62th percentile. Winter: 11th percentile. TORTROPFIREFLOODSEVEREHEATCOLDWINTER

Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed

2026
  • Tornado damage paths since 195030
  • Tropical cyclone tracks within 100 miles since 1851, wider where stronger27

At a glance

The record for Meriwether County in eight numbers. Each links to its section below.

Tornadoes since 1950

30

11th of 159 in Georgia

2.3 times the typical Georgia county

Details

Tropical cyclones within 50 mi

15

95th of 159 in Georgia

None at hurricane strength since 1851

Details

Strongest tornado

F3

December 24, 1964, 75.4 mile path

Strongest tropical cyclone

TS

Tropical storm Eloise, 1975, 39.1 miles away

Federal disaster declarations

18

Most recent: Hurricane Isaias, 2026

Details

Record high

105°F

Reached 2 times, most recently July 1, 2012

Details

Record low

2°F

January 30, 2014

Details

Costliest event since 1996

$6.0M

Tornado, April 27, 2011

Details

Tornadoes

About one every 2.5 years since 1950, 4 of them rated F3/EF3 or stronger.

Strongest

December 24, 1964

F3, 75.4 mile path

400 yards wide.

Deadliest

April 27, 2011

2 killed, EF3

0 injured along the whole path.

Most recent

Sunday, December 29, 2024

EF0, 3.2 mile path

2 years ago.

Tornadoes by decade Doppler radar era² 1950s: 2 2 1960s: 1 1 1970s: 3 3 1980s: 5 5 1990s: 3 3 2000s: 3 3 2010s: 6 6 2020s: 7 7 1950s1960s1970s1980s1990s2000s2010s2020s
Recorded tornadoes per decade. The 2020s are incomplete.
Tornadoes by month J: 2 F: 2 M: 5 A: 7 7 M: 4 J: 0 J: 1 A: 1 S: 0 O: 1 N: 1 D: 6 JFMAMJJASOND
By month of occurrence, all years.

Every recorded tornado

Tornadoes in Meriwether County since 1950
Dec 29, 2024EF03.210000
Dec 29, 2024EF124.620000
Mar 27, 2023EF18.715000
Mar 26, 2023EF321.550050
Jan 12, 2023EF223.41,50000
Jan 12, 2023EF235.81,06080
Aug 17, 2021EF03.415000
Dec 20, 2017EF03.212500
May 26, 2015EF19.835000
Oct 14, 2014EF15.920000
Mar 18, 2013EF213.330000
Apr 27, 2011EF321.788002
Apr 27, 2011EF224.51,32000
Feb 18, 2009EF00.01700
May 11, 2008EF23.830000
Jul 6, 2005F00.310000
Mar 24, 1994F121.05050
Mar 24, 1994F06.05020
Feb 21, 1993F112.060010
Apr 22, 1984F12.01000
Apr 22, 1984F00.32000
Apr 26, 1982F10.32000
May 25, 1980F00.22700
Apr 13, 1980F150.710040
Apr 13, 1979F11.010000
Nov 20, 1974F11.0100150
May 11, 1973F10.15000
Dec 24, 1964F375.440010
Dec 23, 1956F145.310010
Dec 5, 1954F351.020070
  1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Meriwether 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.

Hurricanes and tropical storms

15 passed within 50 miles since 1851; none at hurricane strength.

Strongest within 50 miles

September 23, 1975

Eloise, Tropical storm

39.1 miles at closest approach, winds near 66 mph.

Most recent

September 27, 2024

Helene, Tropical storm

79.6 miles at closest approach.

Tropical cyclones within 50 miles by decade 50s: 2 60s: 0 70s: 0 80s: 3 90s: 4 4 00s: 2 10s: 2 20s: 0 30s: 0 40s: 0 50s: 0 60s: 1 70s: 1 80s: 0 90s: 0 00s: 0 10s: 0 20s: 0 50s60s70s80s90s00s10s20s30s40s50s60s70s80s90s00s10s20s
Storms within 50 miles, by decade. Records before about 1900 miss storms that never reached land or ships.

Every storm within 100 miles

Tropical cyclones within 100 miles
Helene202479.6Tropical storm63Category 4
Zeta202069.8Tropical storm60Category 3
Nestor201998.2Post-tropical43Tropical storm
Michael201861.9Tropical storm69Category 5
Opal199576.7Tropical storm54Category 4
Eloise197539.1Tropical storm66Category 3
Unnamed196543.4Tropical storm46Tropical storm
Flossy195699.0Tropical storm43Category 1
Unnamed194190.4Tropical storm58Category 3
Unnamed193289.6Post-tropical40Tropical storm
Unnamed191766.1Tropical storm46Category 4
Unnamed191511.4Tropical storm44Category 2
Unnamed191211.4Tropical storm41Tropical storm
Unnamed190729.1Post-tropical40Tropical storm
Unnamed190648.9Tropical storm40Tropical storm
Unnamed19036.0Tropical storm40Category 1
Unnamed190218.9Post-tropical40Category 2
Unnamed190139.4Post-tropical40Tropical storm
Unnamed190154.3Tropical storm43Category 1
Unnamed18980.0Tropical storm46Category 4
Unnamed18986.5Tropical storm44Category 1
Unnamed189630.1Tropical storm49Category 2
Unnamed18930.0Tropical storm55Category 4
Unnamed188926.1Tropical storm53Category 2
Unnamed188685.9Tropical storm52Category 2
Unnamed188214.6Tropical storm49Category 3
Unnamed188149.7Tropical storm54Category 2
Unnamed186090.1Tropical storm46Category 3
Unnamed18590.0Tropical storm46Category 1
Unnamed185681.6Tropical storm71Category 3
Unnamed18522.5Tropical storm46Category 3
Unnamed185179.9Category 175Category 3
  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.

Wildfire and smoke

No large wildfire has been mapped here since satellite mapping began in 1984.

Smoke overhead

Smokiest year

2023: 47 days

Heavy smoke on 4 days in 2023, the most of any year.

Last 10 years

11.0 days a year

Medium or heavy smoke, 2016 to 2025.

2025

12 days

Medium or heavy smoke. 33 so far in 2026.

Days with medium or heavy smoke overhead, by year 2011: 8 2012: 4 2013: 0 2014: 0 2015: 1 2016: 1 2017: 0 2018: 3 2019: 4 2020: 3 2021: 15 2022: 17 2023: 47 47 2024: 8 2025: 12 201120122013201420152016201720182019202020212022202320242025
Days each year on which a satellite-traced plume of medium or heavy smoke covered the county’s population centre, 2011 to 2025.
  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.

Floods and flood insurance

No federal flood insurance claims are recorded for this county.

Flood events since 1996

  • Flash Flood8
  • Heavy Rain4
  • Flood3

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

Drought

In severe drought or worse for 181 of 1,581 months since 1895 (11%); the longest spell lasted 21 months.

181

Months in severe drought or worse since 1895

58

Months in extreme drought

11%

Share of all months, severe or worse

36

Drought reports to the Weather Service since 1996

Lowest reading

September 1925

−6.63, extreme drought

Longest severe spell

21 months

February 2007 to October 2008.

Latest month

September 2026

−2.26, moderate drought

Last severe month: April 2026.

Months in severe drought or worse, by year 1895: 0 1896: 1 1897: 0 1898: 6 1899: 2 1900: 0 1901: 0 1902: 3 1903: 0 1904: 4 1905: 9 1906: 0 1907: 0 1908: 0 1909: 0 1910: 0 1911: 1 1912: 0 1913: 0 1914: 3 1915: 0 1916: 0 1917: 0 1918: 0 1919: 0 1920: 0 1921: 0 1922: 0 1923: 0 1924: 0 1925: 8 1926: 8 1927: 11 11 1928: 2 1929: 0 1930: 0 1931: 5 1932: 8 1933: 1 1934: 3 1935: 0 1936: 0 1937: 0 1938: 0 1939: 0 1940: 0 1941: 4 1942: 0 1943: 0 1944: 0 1945: 0 1946: 0 1947: 0 1948: 0 1949: 0 1950: 0 1951: 0 1952: 0 1953: 0 1954: 7 1955: 5 1956: 0 1957: 0 1958: 0 1959: 0 1960: 0 1961: 0 1962: 0 1963: 0 1964: 0 1965: 0 1966: 0 1967: 0 1968: 0 1969: 0 1970: 0 1971: 0 1972: 0 1973: 0 1974: 0 1975: 0 1976: 0 1977: 0 1978: 0 1979: 0 1980: 0 1981: 0 1982: 0 1983: 0 1984: 0 1985: 0 1986: 4 1987: 0 1988: 1 1989: 0 1990: 3 1991: 0 1992: 0 1993: 0 1994: 0 1995: 2 1996: 0 1997: 0 1998: 1 1999: 9 2000: 9 2001: 1 2002: 7 2003: 0 2004: 0 2005: 0 2006: 9 2007: 11 2008: 10 2009: 0 2010: 0 2011: 6 2012: 9 2013: 0 2014: 0 2015: 0 2016: 4 2017: 2 2018: 0 2019: 0 2020: 0 2021: 0 2022: 0 2023: 0 2024: 0 2025: 0 18951905191519251935194519551965197519851995200520152025
Months each year with a Palmer index of −3 or lower, 1895 to 2025. Twelve means the whole year.
  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.

Earthquakes and landslides

4 earthquakes of magnitude 2.5 or more within 50 miles since 1982; none reached magnitude 4.

0

Magnitude 2.5+ inside the county since 1973

1

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

October 30, 1982

Magnitude 3.1

12 km S of Hamilton, Georgia; 15.7 miles away, 0.0 miles deep.

Most recent, magnitude 3 or more

October 30, 1982

Magnitude 3.1

12 km S of Hamilton, Georgia; 15.7 miles away.

  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

1

Landslides mapped, probable or better

0

With a recorded date

1

Source inventory

Mapped by USGS Conterminous (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.

Severe weather and other events

339 events in the National Weather Service record, 291 of them since 1996.

25

Hail reports, 1 inch or larger

3

Hail, 2 inches or larger

64

Damaging gusts, 58 mph+

15

Winter weather events since 1996

11

Heat events since 1996

14

Cold events since 1996

Largest hail

March 18, 2013

2.75 inches

Strongest measured or estimated gust

June 15, 2022

75 mph

More event types since 1996

Other Storm Events types since 1996
Lightning400Apr 29, 2014
Dense fog and smoke200Jan 30, 2002

Costliest events since 1996

  1. Apr 27, 2011Tornado$6.0 million
    National Weather Service narrative

    A damage survey conducted by the National Weather Service Forecast Office in Peachtree City, Georgia confirmed that the EF2 tornado that first touched down in northeast Harris county continued across southern Meriwether county before moving into Upson county where it finally lifted approximately nine miles northwest of Thomaston. The tornado crossed into Meriwether county about four miles southwest of Warm Springs and moved into Upson county just under five miles southeast of Woodbury. The tornado traveled almost 13 miles through Meriwether county. The maximum path width diminished to 1/2 mile with the maximum winds estimated to still be 130 mph. Thousands of trees were destroyed…

  2. Dec 29, 2024Tornado$6.0 million
    National Weather Service narrative

    An EF1 tornado began northeast of Pine Mountain near the Durand community and traveled north northeast along Chipley Highway downing a few thousand trees. A large oak tree fell on an unoccupied home near the 800 block of Chipley Highway completely destroying it. A manufactured home on Mandy B Rd just northeast of this area had its metal roofing blown off. The tornado continued northeast east of Greenville and west and north of Gay downing a few more thousand trees before lifting just south of the Coweta county line near Sullivan Mill Rd.

  3. May 8, 2003Flash Flood$5.0 million
    National Weather Service narrative

    The Georgia Emergency Management Agency, along with the local Meriwether county Emergency Management Director, reported that excessive rain resulted in extensive and historical flooding across the county. It was estimated that 30 roads in the county had either washed out, had bridges washed out, or had collapsed and would require extensive repair. A dozen familes on Hidden Lake Road were stranded by flood waters and remained so for nearly two days. Four people were injured while travelling in their vehicles on flooded roads. One man barely escaped from his F-350 Ford pickup when it was washed away in flood waters. The pickup truck was never recovered. Another was injured when he…

  4. Jul 11, 2005Flash Flood$500,000
    National Weather Service narrative

    The Meriwether County Emergency Management Director reported extensive flash flooding in the eastern portion of the county. Rainfall of 8-12 inches fell across much of the eastern portion of the county. Dozens of roads were washed out and several homes were flooded.

  5. Mar 18, 2013Hail$371,000
    National Weather Service narrative

    The Meriwether County 911 Center relayed numerous reports of damage from baseball sized hail in Luthersville.

  6. Jan 2, 2006Hail$300,000
    National Weather Service narrative

    The Meriwether County 911 Center and Emergency Management Director reported golf ball-sized hail just north of Greenville, while the public reported penny-sized hail near Gay.

  7. Apr 4, 2011Thunderstorm Wind$300,000
    National Weather Service narrative

    The Merwiether County Emergency Management Director reported widespread thunderstorm wind damage across the county. Dozens of trees and power lines were down across the county. A total of four homes were damaged in the county. Two mobile homes in Greenville were completely moved off their foundations. One of the homes was destroyed, while the other was heavily damaged. No evidence of a tornado was found. The sun room of another home was damaged from a downed tree. The two other homes sustained minor damage. Ten roads across the county were closed from downed trees and power lines.

  8. Apr 27, 2011Tornado$250,000
    National Weather Service narrative

    A damage survey conducted by the National Weather Service Forecast Office in Peachtree City, Georgia confirmed that a second tornado touched down in northeast Meriwether county simultaneously while another EF2 tornado was tracking across the southern part of the county. Although this tornado was only EF2 strength during its small track across northeast Meriwether county, it strengthened to an EF3 rating shortly after entering Spalding county and continued at an EF3 rating until it just moved across the Henry county line near the ends of its track. The tornado touched down just south of Alvaton and just south of the intersection of Georgia Highways 74 and 362, then tracked…

  9. Sep 6, 2004High Wind, Meriwether$200,000
    National Weather Service narrative

    High wind damage, associated with Tropical Storm Frances, is listed below, in alphabetical order by county for those counties that "high wind" criteria was either met or assumed to be met.Baldwin: The Georgia Emergency Management Agency reported that extensive and widespread wind damage was observed. Many trees and power lines were down throughout the county and many parts of the county were expected to be without power for up to four days as a result. In addition, four homes suffered major damage and five suffered minor damage. One man was injured and taken to a local hospital when a tree fell on his mobile home. Four to five inches of rain was also reported throughout the…

  10. Jan 28, 2005Winter Storm, Meriwether$150,000
    National Weather Service narrative

    A significant and fairly prolonged winter storm/ice storm affected nearly all of North and Central Georgia from the evening of Friday January 28th to late morning on Sunday January 30th. The winter storm was a result of a very strong and very cold Arctic surface high pressure system located across the Mid-Atlantic states and an upper-level disturbance moving across the region from the west. North of a line from La Grange, to Thomaston, to Sandersville, the precipitation fell mostly as a mixture of sleet and freezing rain, with typical accumulations of one-half inch glaze ice and one to two inches of sleet. Some areas in North Central and Northeast Georgia experienced significant…

  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.

Weather records

From Atlanta, 24.8 miles from the county’s population centre, with records from 1994.

All-time high
105°F2 times, most recently Jul 1, 2012
All-time low
2°FJan 30, 2014
Warmest night
77°F3 times, most recently Jun 30, 2024
Coldest day
26°FJan 7, 2014
Wettest day
6.44 inOct 4, 1995
Hottest year
2019mean 65.8°F
Coldest year
1997mean 59.5°F
Wettest year
201567.49 in
Driest year
200731.55 in
Average monthly high and low temperature and precipitation, last 30 years, Atlanta 32°F 55° 32° 3.8 Jan 60° 36° 4.0 Feb 68° 42° 4.4 Mar 75° 48° 3.8 Apr 81° 57° 3.4 May 88° 65° 3.9 Jun 90° 69° 4.1 Jul 89° 68° 3.3 Aug 84° 62° 3.1 Sep 75° 50° 2.8 Oct 65° 39° 3.2 Nov 58° 35° 4.1 Dec Precipitation, inches
Average daily high and low by month, and average monthly precipitation, over the last 30 years.
Days reaching 95°F per year 1997: 1 1998: 10 1999: 19 2000: 17 2001: 0 2002: 8 2003: 0 2004: 0 2005: 1 2006: 14 2007: 19 2008: 8 2009: 13 2010: 32 2011: 24 2012: 15 2013: 0 2014: 2 2015: 16 2016: 25 2017: 1 2018: 4 2019: 44 44 2020: 3 2021: 2 2022: 14 2023: 7 2024: 26 2025: 6 199720072017
Days reaching 95°F each complete year, last 50 years. Thirty-year average: 11.4.

Station Atlanta (USW00053819), 972 ft elevation, 24.8 miles from the population centre. Daily records from 1994 to October 26, 2026; 99.6% 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

18 since 1953. The most recent: Hurricane Isaias, October 9, 2026.

Federal disaster declarations
Oct 9, 2026Tropical StormHurricane IsaiasEmergencyEM-3657-GA
Jan 24, 2026Winter StormSevere Winter StormEmergencyEM-3642-GA
Sep 26, 2024Tropical StormHurricane HeleneEmergencyEM-3616-GA
Jan 16, 2023Severe StormSevere Storms, Straight-Line Winds, and TornadoesMajor disasterDR-4685-GA
Mar 29, 2020BiologicalCovid-19 PandemicMajor disasterDR-4501-GA
Mar 13, 2020BiologicalCovid-19EmergencyEM-3464-GA
Sep 15, 2017HurricaneHurricane IrmaMajor disasterDR-4338-GA
Sep 8, 2017HurricaneHurricane IrmaEmergencyEM-3387-GA
Feb 26, 2016Severe StormSevere Storms and FloodingMajor disasterDR-4259-GA
Mar 6, 2014Severe Ice StormSevere Winter StormMajor disasterDR-4165-GA
Feb 11, 2014Severe Ice StormSevere Winter StormEmergencyEM-3368-GA
Apr 29, 2011Severe StormSevere Storms, Tornadoes, Straight-Line Winds, and Associated FloodingMajor disasterDR-1973-GA
Sep 5, 2005HurricaneHurricane Katrina EvacuationEmergencyEM-3218-GA
Oct 10, 1995HurricaneHurricane OpalMajor disasterDR-1071-GA
Jul 7, 1994TornadoTornadoes, Flooding Torrential Rain(Trop Storm Alberto)Major disasterDR-1033-GA
Mar 4, 1993TornadoTornadoes, High Winds & Heavy RainsMajor disasterDR-980-GA
Feb 23, 1990Severe StormSevere Storms, Tornaodes & FloodingMajor disasterDR-857-GA
Jul 20, 1977DroughtDroughtEmergencyEM-3044-GA

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 Meriwether County stands among 159 counties in Georgia and 3,143 in the United States.

Ranks
Tornadoes since 19503011 / 159994 / 3,143
Tornadoes rated F3/EF3 or stronger45 / 159387 / 3,143
Tropical cyclones within 50 mi1595 / 159618 / 3,143
Hurricane-strength passes within 50 mi0——
Wildfire acres since 19840——
Flood insurance claims0——
Flood insurance paid$0——
Disaster declarations1869 / 1591,866 / 3,143
Flood events since 19961597 / 1592,715 / 3,143
Hail and wind events since 199616474 / 1592,259 / 3,143
Winter storm events since 19961561 / 1592,712 / 3,143
Reported damage since 1996$20.5 million51 / 1591,473 / 3,143
River crests at major flood stage0——
High tide flooding days a year, last 10 years0.0——
Months in severe drought since 18951813 / 159439 / 3,143
Medium or heavy smoke days a year, last 10 years11.06 / 1592,354 / 3,143
Earthquakes M4+ within 50 mi since 19000——
Earthquakes M2.5+ in the county since 19730——

Neighbouring counties

Neighbouring counties
Coweta County3313038
Harris County2617011
Pike County151004
Spalding County2510024
Talbot County211706
Troup County2315076
Upson County2114026

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 USW00053819.
  • 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.