Bonham
Population 11,263 (2025)
121 tornadoes have tracked within 25 miles of Bonham since 1950, 8 of them rated EF3 or F3 or stronger; the most recent was on June 8, 2025.
Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed
- Tornado damage paths within 25 miles since 1950121
- Tropical cyclone tracks within 100 miles since 1851, wider where stronger5
- Wildfire burn scars within 25 miles since 19841
At a glance
Tornado paths within 25 miles, tropical cyclone tracks within 100 miles and wildfire perimeters within 25 miles of the city centre. Storm events, flood insurance claims and disaster declarations are for Fannin County. Earthquakes within 50 miles, volcanoes within 100 miles and smoke days are measured from the city centre; river and tide gauges, tsunami and landslide records and the drought index are for Fannin County.
Strongest tornado
F3
March 12, 1971, 41.6 mile path
Strongest tropical cyclone
TS
Tropical storm (unnamed), 1902, 7.0 miles away
Federal disaster declarations
20
Most recent: Severe Storms, Straight-Line Winds, Tornadoes, and Flooding, 2024
DetailsTornadoes
About 2 tornados a year since 1950, 8 of them rated F3/EF3 or stronger.
Strongest
March 12, 1971
F3, 41.6 mile path
250 yards wide.
Deadliest
May 9, 2006
3 killed, F3
10 injured along the whole path.
Most recent
Sunday, June 8, 2025
EF1, 7.0 mile path
Within the past year.
Every recorded tornado
| Jun 8, 2025 | EF1 | 7.0 | 0 | 0 |
| Jun 8, 2025 | EF1 | 4.3 | 0 | 0 |
| Jun 8, 2025 | EF1 | 4.0 | 0 | 0 |
| May 19, 2025 | EF0 | 1.4 | 0 | 0 |
| May 25, 2024 | EF1 | 1.1 | 0 | 0 |
| Dec 13, 2022 | EF2 | 10.2 | 0 | 0 |
| Dec 13, 2022 | EF1 | 6.6 | 0 | 0 |
| Dec 13, 2022 | EF2 | 17.6 | 2 | 0 |
| Apr 4, 2022 | EF1 | 0.3 | 0 | 0 |
| Mar 14, 2022 | EF1 | 3.3 | 0 | 0 |
| Apr 24, 2020 | EFU | 0.1 | 0 | 0 |
| Apr 24, 2020 | EFU | 0.1 | 0 | 0 |
| Apr 24, 2020 | EF2 | 7.9 | 1 | 0 |
| May 29, 2019 | EF0 | 10.8 | 0 | 0 |
| Apr 26, 2016 | EF0 | 6.0 | 0 | 0 |
| Apr 26, 2016 | EF0 | 2.4 | 5 | 0 |
| Dec 26, 2015 | EF1 | 5.2 | 2 | 1 |
| May 25, 2015 | EF0 | 2.4 | 0 | 0 |
| May 25, 2015 | EF0 | 1.7 | 0 | 0 |
| May 10, 2015 | EF1 | 2.6 | 0 | 0 |
| Apr 3, 2014 | EF1 | 11.8 | 4 | 0 |
| Jun 13, 2012 | EF0 | 0.2 | 0 | 0 |
| Apr 14, 2011 | EF0 | 1.5 | 0 | 0 |
| Mar 8, 2011 | EF0 | 4.0 | 0 | 0 |
| Dec 8, 2008 | EF2 | 3.6 | 3 | 0 |
| May 9, 2006 | F3 | 9.3 | 10 | 3 |
| Mar 30, 2006 | F0 | 0.1 | 0 | 0 |
| May 27, 2000 | F0 | 0.2 | 0 | 0 |
| May 27, 2000 | F0 | 0.2 | 0 | 0 |
| Apr 26, 1999 | F1 | 0.2 | 0 | 0 |
| Oct 25, 1997 | F0 | 0.5 | 1 | 0 |
| Jan 17, 1996 | F2 | 2.5 | 5 | 0 |
| Apr 29, 1995 | F0 | 0.1 | 0 | 0 |
| Jun 15, 1994 | F0 | 0.1 | 0 | 0 |
| Apr 26, 1994 | F0 | 0.1 | 0 | 0 |
| Apr 26, 1994 | F0 | 0.1 | 0 | 0 |
| Apr 26, 1994 | F0 | 0.1 | 0 | 0 |
| Apr 26, 1994 | F0 | 0.1 | 0 | 0 |
| Apr 26, 1994 | F0 | 1.5 | 0 | 0 |
| Apr 26, 1994 | F1 | 8.5 | 0 | 0 |
| Jun 8, 1993 | F0 | 0.1 | 0 | 0 |
| Oct 7, 1992 | F1 | 0.5 | 0 | 0 |
| May 11, 1992 | F1 | 0.1 | 0 | 0 |
| May 11, 1992 | F2 | 0.2 | 0 | 0 |
| May 11, 1992 | F2 | 1.0 | 0 | 0 |
| Apr 28, 1991 | F1 | 0.2 | 0 | 0 |
| Aug 12, 1988 | F1 | 0.2 | 0 | 0 |
| Apr 5, 1988 | F0 | 0.2 | 0 | 0 |
| Jun 23, 1987 | F0 | 0.2 | 0 | 0 |
| Jun 23, 1987 | F0 | 0.2 | 0 | 0 |
| Jun 23, 1987 | F0 | 0.2 | 0 | 0 |
| Jun 4, 1986 | F0 | 0.2 | 0 | 0 |
| Jun 4, 1986 | F0 | 0.2 | 0 | 0 |
| Jun 4, 1986 | F0 | 0.2 | 0 | 0 |
| Apr 4, 1986 | F0 | 0.2 | 0 | 0 |
| Mar 27, 1984 | F0 | 1.0 | 0 | 0 |
| Nov 22, 1982 | F1 | 5.0 | 0 | 0 |
| Nov 22, 1982 | F1 | 6.0 | 0 | 0 |
| Jun 15, 1982 | F0 | 0.5 | 0 | 0 |
| Apr 25, 1982 | F0 | 1.0 | 0 | 0 |
| Apr 2, 1982 | F2 | 1.0 | 0 | 0 |
| Apr 2, 1982 | F3 | 32.0 | 1 | 1 |
| Oct 13, 1981 | F1 | 0.1 | 0 | 0 |
| Oct 13, 1981 | F1 | 5.6 | 0 | 0 |
| May 13, 1981 | F2 | 1.0 | 0 | 0 |
| Mar 17, 1981 | F2 | 1.0 | 1 | 0 |
| Oct 17, 1980 | F1 | 1.0 | 0 | 0 |
| Oct 17, 1980 | F1 | 6.2 | 0 | 0 |
| Apr 24, 1980 | F0 | 0.1 | 0 | 0 |
| Jul 10, 1979 | F0 | 0.1 | 0 | 0 |
| Apr 18, 1977 | F1 | 3.0 | 0 | 0 |
| Apr 18, 1977 | F0 | 0.1 | 0 | 0 |
| Apr 18, 1977 | F0 | 0.1 | 0 | 0 |
| Apr 18, 1977 | F1 | 0.1 | 0 | 0 |
| Apr 18, 1977 | F1 | 0.1 | 0 | 0 |
| Apr 18, 1977 | F1 | 0.1 | 0 | 0 |
| Apr 18, 1977 | F1 | 0.1 | 0 | 0 |
| May 30, 1976 | F1 | 0.1 | 0 | 0 |
| Apr 20, 1976 | F1 | 0.1 | 0 | 0 |
| May 25, 1974 | F2 | 8.5 | 0 | 0 |
| May 6, 1973 | F2 | 0.5 | 3 | 0 |
| May 6, 1973 | F2 | 0.1 | 0 | 0 |
| Dec 14, 1971 | F1 | 0.5 | 0 | 0 |
| Dec 14, 1971 | F0 | 3.6 | 0 | 0 |
| Dec 14, 1971 | F2 | 0.6 | 1 | 0 |
| Mar 12, 1971 | F3 | 5.1 | 0 | 0 |
| Mar 12, 1971 | F3 | 5.1 | 0 | 0 |
| Mar 12, 1971 | F1 | 0.1 | 0 | 0 |
| Mar 12, 1971 | F3 | 41.6 | 4 | 0 |
| Feb 18, 1971 | F1 | 2.0 | 0 | 0 |
| Jun 23, 1970 | F2 | 0.1 | 0 | 0 |
| Apr 25, 1970 | F1 | 6.1 | 0 | 0 |
| Mar 25, 1967 | F2 | 2.0 | 0 | 0 |
| May 23, 1966 | F3 | 2.0 | 5 | 0 |
| May 23, 1966 | F1 | 2.0 | 0 | 0 |
| May 23, 1966 | F0 | 2.0 | 0 | 0 |
| May 23, 1966 | F1 | 0.1 | 0 | 0 |
| May 23, 1966 | F1 | 0.1 | 0 | 0 |
| May 23, 1966 | F1 | 1.5 | 0 | 0 |
| May 23, 1966 | F1 | 0.5 | 0 | 0 |
| May 23, 1966 | F0 | 1.5 | 0 | 0 |
| May 23, 1966 | F0 | 0.4 | 0 | 0 |
| Apr 22, 1964 | F3 | 5.9 | 2 | 0 |
| Jul 29, 1963 | F1 | 0.5 | 0 | 0 |
| Mar 24, 1962 | F1 | 2.0 | 0 | 0 |
| Mar 24, 1962 | F0 | 0.1 | 0 | 0 |
| Mar 26, 1961 | F2 | 0.1 | 0 | 0 |
| May 20, 1960 | F1 | 0.4 | 0 | 0 |
| May 20, 1960 | F1 | 4.6 | 1 | 0 |
| May 20, 1960 | F2 | 2.7 | 0 | 0 |
| Oct 4, 1959 | F2 | 4.3 | 2 | 0 |
| Mar 20, 1959 | F2 | 10.7 | 0 | 0 |
| Mar 20, 1959 | F2 | 10.7 | 0 | 0 |
| Aug 12, 1958 | F1 | 2.0 | 0 | 0 |
| Apr 2, 1957 | F2 | 0.1 | 2 | 1 |
| Apr 2, 1957 | F2 | 0.1 | 0 | 0 |
| Apr 2, 1957 | F2 | 0.1 | 2 | 0 |
| Apr 6, 1955 | F2 | 37.9 | 1 | 0 |
| Apr 6, 1955 | F3 | 30.2 | 27 | 1 |
| May 6, 1954 | F1 | 0.1 | 0 | 0 |
| May 1, 1954 | F1 | 1.0 | 0 | 0 |
- Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
- 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
1 passed within 50 miles since 1851; none at hurricane strength.
Strongest within 50 miles
June 28, 1902
Unnamed storm, Tropical storm
7.0 miles at closest approach, winds near 40 mph.
Most recent
September 14, 2008
Ike, Tropical storm
74.5 miles at closest approach.
Every storm within 100 miles
- 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
1 large fire burned within 25 miles since 1984.
Largest
December 29, 2005
Achille Fire, 4,955 acres
19.9 miles from the city centre.
Most recent
December 29, 2005
Achille Fire
4,955 acres in total.
Every large fire
| Achille | 2005 | 19.9 | 4,955 |
- 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
Smokiest year
2023: 40 days
Heavy smoke on 8 days in 2021, the most of any year.
Last 10 years
14.1 days a year
Medium or heavy smoke, 2016 to 2025.
2025
5 days
Medium or heavy smoke. 20 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
60 federal flood insurance claims since 1981, with $1.7 million paid.
Flood insurance figures are for Fannin County, the county that contains Bonham.
Most claims in one year
2018: 16 claims
$1.1 million paid.
2nd most
1990: 11 claims
$254,000 paid.
3rd most
2015: 9 claims
$114,000 paid.
Claims by ZIP code
| 75418 | 43 | $1.5 million |
| 75452 | 14 | $137,000 |
Flood events since 1996
- Flash Flood56
- Flood16
- Heavy Rain5
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.
Drought
In severe drought or worse for 151 of 1,581 months since 1895 (10%); the longest spell lasted 36 months.
The drought index is for Fannin County, the county that contains Bonham.
151
Months in severe drought or worse since 1895
70
Months in extreme drought
10%
Share of all months, severe or worse
70
Drought reports to the Weather Service since 1996
Lowest reading
January 1911
−6.06, extreme drought
Longest severe spell
36 months
April 1909 to March 1912.
Latest month
September 2026
−2.98, moderate drought
Last severe month: May 2026.
- 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
15 earthquakes of magnitude 2.5 or more within 50 miles since 1968; none reached magnitude 4.
8
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 14, 1968
Magnitude 3.5
2 km WNW of Durant, Oklahoma; 30.9 miles away.
Most recent, magnitude 3 or more
October 11, 2013
Magnitude 3.0
4 km S of Bee, Oklahoma; 41.0 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 city centre.
- 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
807 events in the National Weather Service record for Fannin County, 603 of them since 1996.
189
Hail reports, 1 inch or larger
31
Hail, 2 inches or larger
140
Damaging gusts, 58 mph+
37
Winter weather events since 1996
58
Heat events since 1996
8
Cold events since 1996
Largest hail
May 16, 1989
4.50 inches
Strongest measured or estimated gust
May 29, 2019
100 mph
More event types since 1996
| Lightning | 7 | 0 |
| Dense fog and smoke | 1 | 1 |
Costliest events since 1996
- Dec 5, 2013Winter Storm, Fannin$2.0 million
National Weather Service narrative
Up to 4 of ice and sleet accumulated in Fannin County. On average, 2.5-3 of ice and sleet was reported and most of the reports were sleet accumulations. In Bonham, law enforcement reported 2.5 of sleet accumulation. Numerous tree branches broke under the weight of the ice. In Bonham, the roof of JCS Whiskey River caved in and the awning at Bonham Barber Stylists collapsed. In Ector, part of the roof of the junior high school caved inward and two of the main beams in the high school gym were twisted under the weight of the ice.
- May 23, 2024Thunderstorm Wind$1.8 million
National Weather Service narrative
Emergency management reported significant damage in Leonard with downed trees, trees on vehicles, and damages to the Leonard ISD campuses. Damage estimates to the school facilities were near 1.5 million.
- Feb 14, 2021Extreme Cold/Wind Chill, Fannin$1.5 million
National Weather Service narrative
Extreme cold gripped the county for several days. Overnight lows were near or below 10 degrees Fahrenheit for most of the week. The period of February 15-16th was the coldest with low temperatures between 2 and -5 degrees Fahrenheit, and the maximum temperature on the 15th was only in the lower teens. Wind chill values during the 14th-16th were between 0 to -20 degrees Fahrenheit most of the time. The cold temperatures resulted in an extreme amount of damage to pipes, infrastructure, and power.
- Aug 20, 1997Thunderstorm Wind$1.1 million
National Weather Service narrative
Strong winds, estimated at more than 100 mph, caused severe building damage, demolished two grain elevators, destroyed sheds, damaged homes, and blew down power lines. Flying debris injured a man at the feed mill, where much of the damage occurred.
- Jun 13, 2012Hail$1.0 million
National Weather Service narrative
Softball sized hail fell in Leonard. Trees and shrubs were heavily damaged from the large hail.
- Jun 13, 2012Thunderstorm Wind$600,000
National Weather Service narrative
Damaging downburst winds between 70 to 95 mph caused damage along a line from approximately 1.5 miles north of Randolph to 2 miles east-southeast of Leonard. Many trees were snapped or uprooted along the path and several barns and outbuildings either lost much of their roofs or were overturned. Four manufactured homes were rolled over along the path of destructive winds, and a few more homes sustained damage to the roofs and/or siding. The homes that rolled over were located near FM 1553 and CR 4709 north of Leonard, near CR 4860 and 4855 east of Leonard, and two homes rolled over on CR 4851 east of Leonard. A total of three people were injured from the rolling homes. In addition,…
- May 15, 2022Thunderstorm Wind$500,000
National Weather Service narrative
Very strong straight-line winds associated with a line of severe thunderstorms produced considerable damage over portions of eastern Fannin County Sunday evening. The most significant damage occurred in and around Honey Grove, where winds of up to 95 mph produced widespread tree and light structural roof and fa��ade damage. A small wood framed church in Honey Grove was pushed approximately two feet off its foundation, and encountered substantial roof damage. A nearby metal-poled traffic sign was bent horizontally to the ground. Peak straight line winds of 95 mph were associated with these indicators. Numerous large trees and branches were snapped and/or uprooted in and near Honey Grove.
- Oct 1, 2006Drought, Fannin$500,000
National Weather Service narrative
Persistent drought conditions continued across portions of north Texas. According to the U.S. Drought Monitor, much of the region was still experiencing extreme (D3) drought conditions. The areas which were rated exceptional drought (D4) last month had received enough rainfall to be downgraded into the D3 category this month.|Even though drought conditions were lessened by a few rain events this month, serious hydrological problems remained. For instance, as much water was used from Lake Bridgeport in one month alone as was saved through conservation efforts by north Texas over the summer. Almost every north Texas lake remained well below conservation levels. The rain events this…
- Apr 24, 2020Tornado$500,000
National Weather Service narrative
A tornado began to the west of Ivanhoe along CR 1120. Minor house damage and notable tree damage was observed. The tornado was tracked by tree damage across SH 78. The tornado did additional damage to homes, structures and trees between SH 78 and FM 273. The tornado intensified as it approached FM 273 in Ivanhoe. To the east of the road, a brick home lost its roof, and a double wide was rolled and destroyed. This is where the one injury occurred. Farther east of this location, along CR 2210, another home sustained roof damage and damage to a large metal shop. From this point, the tornado tracked in mostly open land, but could be tracked in the trees before dissipating just west of…
- Apr 26, 2026Hail$500,000
National Weather Service narrative
Emergency manager reported baseball size hail in the areas of Whitewright, Trenton, and Leonard. Numerous homes and cars have windows broken.
- 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 Bonham 3NNE, 3.8 miles from the city centre, with records from 1903.
- All-time high
- 115°FAug 10, 1936
- All-time low
- −5°F3 times, most recently Jan 19, 1930
- Warmest night
- 89°FJun 26, 2024
- Coldest day
- 11°F2 times, most recently Feb 16, 2021
- Wettest day
- 13.30 inJul 3, 1903
- Snowiest day
- 8.0 inJan 4, 1910
- Hottest year
- 1944mean 67.3°F
- Coldest year
- 1989mean 60.7°F
- Wettest year
- 201576.32 in
- Driest year
- 196321.76 in
Station Bonham 3NNE (USC00410923), 598 ft elevation, 3.8 miles from the city centre. Daily records from 1903 to October 26, 2026; 88.1% 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
20 since 1953. The most recent: Severe Storms, Straight-Line Winds, Tornadoes, and Flooding, May 17, 2024.
Declarations for Fannin County.
| May 17, 2024 | Flood | DR-4781-TX |
| Feb 19, 2021 | Severe Ice Storm | DR-4586-TX |
| Feb 14, 2021 | Severe Ice Storm | EM-3554-TX |
| Mar 25, 2020 | Biological | DR-4485-TX |
| Mar 13, 2020 | Biological | EM-3458-TX |
| Feb 25, 2019 | Flood | DR-4416-TX |
| May 29, 2015 | Severe Storm | DR-4223-TX |
| Mar 14, 2008 | Fire | EM-3284-TX |
| Jun 29, 2007 | Severe Storm | DR-1709-TX |
| Jan 11, 2006 | Fire | DR-1624-TX |
| Sep 24, 2005 | Hurricane | DR-1606-TX |
| Sep 21, 2005 | Hurricane | EM-3261-TX |
| Sep 2, 2005 | Hurricane | EM-3216-TX |
| Jan 8, 2001 | Severe Ice Storm | DR-1356-TX |
| Sep 1, 1999 | Fire | EM-3142-TX |
| Aug 26, 1998 | Severe Storm | DR-1239-TX |
| May 2, 1990 | Severe Storm | DR-863-TX |
| May 19, 1989 | Severe Storm | DR-828-TX |
| Jan 27, 1972 | Flood | DR-320-TX |
| May 12, 1966 | Flood | DR-218-TX |
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.
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 USC00410923.
- 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.