June 26 in Weather History

221 events on record, 1615 to 2026

Every tornado, hurricane, flood, blizzard, heat wave, record, earthquake, eruption, tsunami, wildfire and geomagnetic storm on record for June 26, in any year, each linked to its full record.

← June 25TodayJune 27 →

June 26 on the map

Every event with a place, colored by kind. Tap one to open its record.

  • Tornadoes
  • Hurricanes and tropical storms
  • Floods
  • Severe storms
  • Heat and drought
  • Wildfires
  • Earthquakes
  • Volcanoes
  • Tsunamis
  • Other weather

The most significant

By deaths, damage and strength together, across every archive.

Billion-dollar disasters

1989Tropical Storm Allison (June 1989)

A tropical cyclone disaster that cost $1.5 billion in 2024 dollars and killed 11, on NOAA’s billion-dollar list. It lasted from June 26, 1989 to June 28, 1989.

Losses (2024 dollars)
$1.5 billion
Kind
Tropical Cyclone
Deaths
11

The full record

Tornadoes

1887F3 tornado, Rusk County, Texas

An F3 tornado touched down in Rusk County, Texas and 200 yards wide at its widest, killing 6 and injuring 10. From Grazulis's record of significant tornadoes: New Prospect to NE Fair Play, TX.

Rating
F3
Deaths
6
Injuries
10
Width
200 yd

The full record

Tornadoes

1874F3 tornado, Buchanan County, Iowa

An F3 tornado touched down in Buchanan County, Iowa and tracked 11.3 miles, killing 1 and injuring 15. From Grazulis's record of significant tornadoes: SW Independence/Quasqueton/Rowley, IA.

Rating
F3
Deaths
1
Injuries
15
Path
11.3 mi

The full record

By kind

Tornadoes

61 on June 26, oldest first.

1874F3 tornado, Buchanan County, Iowa

An F3 tornado touched down in Buchanan County, Iowa and tracked 11.3 miles, killing 1 and injuring 15. From Grazulis's record of significant tornadoes: SW Independence/Quasqueton/Rowley, IA.

Rating
F3
Deaths
1
Injuries
15
Path
11.3 mi

The full record

1887F3 tornado, Rusk County, Texas

An F3 tornado touched down in Rusk County, Texas and 200 yards wide at its widest, killing 6 and injuring 10. From Grazulis's record of significant tornadoes: New Prospect to NE Fair Play, TX.

Rating
F3
Deaths
6
Injuries
10
Width
200 yd

The full record

1983Two days of severe thunderstorms battered much of western north Texas on June 26th and 27th, 1983

Two days of severe thunderstorms battered much of western north Texas on June 26th and 27th, 1983. On the 26th, winds stronger than 60 mph toppled a wall in a historic building in Vernon. The next day, 85 mph winds blew through Chillicothe, while a tornado passed just north of the town. The winds also blew down two miles of power lines near Odell, and destroyed a drive-in movie theater in Seymour.

From the National Weather Service in Norman, Oklahoma.

The full record

1994Tornado and Hail in South Carolina, June 26, 1994

Severe thunderstorms scattered asross coastal South Carolina caused considerable wind damage to trees and power lines, and disrupted traffic in some areas. A funnel cloud was sighted four miles north of Beaufort Marine Air Base.

Injuries
1
Damage
$1.2 million
Strongest
F2
Events
27

The full record

2009Tornado and Hail in Connecticut, June 26, 2009

A cold front moved across Southern New England providing lift for showers and thunderstorms to develop across the area. Strong instability across the state of Connecticut as well as deep layer shear resulted in many of these storms to become severe.

Damage
$1.8 million
Strongest
EF1
Events
24

The full record

2018Tornado and Hail in North Dakota, June 26, 2018

A narrow axis of enhanced instability developed ahead of an approaching cold front. The instability then expanded eastward, with deep layer shear increasing. Widespread severe weather developed over western and portions of central North Dakota, with multiple reports of damage.

Damage
$950,000
Strongest
EF0
Events
28

The full record

2021Tornadoes and Damaging Wind in Michigan, June 26, 2021

A low pressure system and warm front combined to setup conditions favorable for the development of several weak tornadoes on June 26th. Storm damage surveys were conducted and it was determined that two EF-1 tornadoes occurred and that several EF-0 tornadoes occurred.

Damage
$875,000
Strongest
EF1
Events
7

The full record

Hurricanes and tropical storms

6 on June 26, oldest first.

1945An unnamed storm makes landfall near Harkers Island, NC

An unnamed storm crossed the coast near Harkers Island, NC as a category 1 hurricane, 65 kt (75 mph). The 1945 Florida–Outer Banks hurricane was a moderate Atlantic hurricane that tracked along the East Coast of the United States from Florida to the Carolinas in the first month of the annual season. The first tropical storm and hurricane of the year, it developed on June 20 in the western Caribbean off Mexico.

Wind at landfall
65 kt
Peak wind
85 kt

From Wikipedia, CC BY-SA 4.0.

The full record

1986Hurricane Bonnie makes landfall near Stowell, TX

Hurricane Bonnie crossed the coast near Stowell, TX as a category 1 hurricane, 75 kt (85 mph), central pressure 990 mb. Hurricane Bonnie caused moderate damage along the Gulf Coast of the United States in late June 1986. The second named storm and first hurricane of the 1986 Atlantic hurricane season, Bonnie developed out of an area of low pressure over the central Gulf of Mexico on June 23.

Wind at landfall
75 kt
Pressure
990 mb
Peak wind
75 kt

From Wikipedia, CC BY-SA 4.0.

The full record

Floods

20 on June 26, oldest first.

1998Flash Flooding in Ohio, June 26 to 30, 1998

Thunderstorm continued to move across Tuscarawas County during the day of the 28th. By that evening, major flash flooding problems were reported countywide. The city of Uhrichsville was especially hard hit, with 300 families forced to evacuated.

Damage
$20 million
Events
6

The full record

1998Flash Flooding in Ohio, June 26 to 30, 1998

Thunderstorms continued to move across Guernsey county on the 27th, bringing widespread flooding to the entire county. The town of Byesville was especially hard hit, as two cars were swept off the road in on the evening of the 27th, but both drivers were rescued.

Damage
$19 million
Events
4

The full record

1998Flash Flooding in Ohio, June 26 to 30, 1998

Another series of thunderstorms passed over the county on the evening of the 27th, triggering extensive flash flooding across the entire county. Subsequent thunderstorms over the next several days continued the flooding through the end of the month.

Damage
$15 million
Events
2

The full record

2005Flooding in Iowa, June 26 to 30, 2005

June temperatures averaged 73.4º or 3.6º above normal while precipitation averaged 5.19 inches or 0.55 inches above normal. This ranks as the 14th warmest and 50th wettest June among 133 years of state records. This was also the warmest June since 1991 and wettest since 2000.

Damage
$3.3 million
Events
27

The full record

2008Flash Flooding and Hail in Ohio, June 26, 2008

Very warm and more humid air became established across the region by midday on the 26th. Low pressure was located well north of the area in Ontario, and another trough of low pressure was swinging southeast from Michigan.

Deaths
1
Injuries
1
Damage
$362,000
Strongest
1 in hail
Events
35

The full record

2015Flooding in Ohio, June 26 to 30, 2015

An intense low pressure system developed over the Southern Plains, in conjunction with an upper-level trough. This low pressure system developed much like a winter weather system, as the storm deepened as it progressed eastward.

Damage
$10 million
Events
4

The full record

2021Flash Flooding and Hail in Texas, June 26, 2021

An upper level trough was over Arizona and New Mexico. A cold front was stalled across portions of Southeast New Mexico and the northern Permian Basin. Hot temperatures were in place ahead of the cold front.

Damage
$30 million
Strongest
1.75 in hail
Events
16

The full record

2023Flash Flooding and Hail in North Carolina, June 26 to 27, 2023

A cold front interacted with a moist and unstable air mass to result in numerous showers and storms across central North Carolina. A few discrete cells first developed during the evening in the northwest Piedmont, resulting in reports of one to two inch hail there.

Damage
$359,000
Strongest
2 in hail
Events
66

The full record

2026Flash Flood in Idaho, June 26, 2026

Following a morning cold front, clearing skies allowed for weak to moderate instability (500-1000 j/kg of CAPE) to build in across SW Idaho. With an upper trough just to the west, dynamics and kinematics were favorable for thunderstorm development.

Damage
$7.0 million
Events
1

The full record

2026Flash Flooding and Hail in Oklahoma, June 26 to 27, 2026

Scattered thunderstorms developed in the vicinity of a weak surface front/pressure trough across northern Oklahoma on the evening of the 26th. This activity produced damaging winds, hail and flooding as it progressed south/southeastward into the early morning of the 27th.

Damage
$1.1 million
Strongest
2.25 in hail
Events
39

The full record

Severe storms

24 on June 26, oldest first.

1995Hail and Damaging Winds in New York, June 26, 1995

Severe thunderstorms moved across parts of eastern New York on the afternoon of the 26th ahead of a cold front. Trees and power lines were downed by thunderstorm winds in Broome, Chenango, Cortland, Delaware, Oneida, Otsego, and Schoharie Counties.

Deaths
1
Injuries
1
Damage
$218,000
Strongest
50 kt wind
Events
27

The full record

1999Hail in Nebraska, June 26, 1999

Thunderstorms with large hail and winds exceeding 80 mph caused extensive damage to crops and property over a large part of western Cheyenne county in Nebraska, with many crops completely destroyed. This was the most damaging hailstorm ever recorded in Cheyenne county.

Damage
$26 million
Strongest
2.75 in hail
Events
1

The full record

2004Strong Wind in Vermont, June 26, 2004

A cold trough in the upper levels of the atmosphere resulted in micro burst type winds. People reported hearing only one clap of thunder with no lightning. Wind gusts were estimated at 40 to 50 mph.

Deaths
1
Damage
$20,000
Events
1

The full record

2005Hail and Damaging Winds in Massachusetts, June 26, 2005

Scattered thunderstorms, with embedded severe thunderstorms, produced lightning and severe wind gusts that damaged property and brought down trees and power lines across Massachusetts. The hardest hit were Franklin, Hampshire, Worcester, Essex, and Plymouth counties.

Injuries
15
Damage
$280,000
Strongest
1.5 in hail
Events
14

The full record

2015Hail and Damaging Winds in South Carolina, June 26 to 27, 2015

A line of thunderstorms moved through the Midlands and produced wind damage and hail. Most of the wind damage was to trees and powerlines. One woman also died from injuries sustained from a lightning strike at Columbia Metropolitan Airport while she deplaned.

Deaths
1
Damage
$96,000
Strongest
55 kt wind
Events
22

The full record

2024Damaging Winds in New Jersey, June 26, 2024

Showers and thunderstorms formed west of our area along a cold front and then moved east towards our area. The storms became severe and continued in a warm and moist environment, producing damaging winds across northeast NJ.

Deaths
1
Injuries
1
Damage
$59,000
Strongest
55 kt wind
Events
18

The full record

2024Damaging Winds in Connecticut, June 26, 2024

Strong storms moved through southern New England overnight bringing a line of very strong winds which caused damage in Connecticut while also producing two tornadoes in Rhode Island and Massachusetts.

Deaths
1
Damage
$12,000
Strongest
67 kt wind
Events
13

The full record

Heat and drought

18 on June 26, oldest first.

1998Heat in Illinois, June 26 to 28, 1998

A hot and humid airmass built in across Central Illinois late in June. High temperatures on June 26th and 27th climbed into the middle and upper 90s. This combined with the high humidity values produced heat indicies of 105 to 110 degrees at times.

Deaths
1
Events
35

The full record

1998Heat in Oklahoma, June 26, 1998

A 40-year old man in Tulsa collapsed from heat stroke on June 26 and later died on July 13. After a morning low in Tulsa of 80 degrees Fahrenheit, the high temperature reached 96 degrees with a heat index was around 105 degrees.

Deaths
1
Events
1

The full record

1999Heat in Texas, June 26 to 28, 1999

Excessive heat occurred across southeast Texas. High temperatures were in the mid 90s with lows around 80 degrees. Record high minimum temperatures were reported at Houston Intercontinental Airport on the 27th and 28th. All three fatalities occurred in Harris County.

Deaths
3
Events
23

The full record

2001Heat in Pennsylvania, June 26 to 30, 2001

A large ridge of high pressure both at the surface and aloft along the western Atlantic Ocean produced six consecutive days of heat and increasing humidity across southeastern Pennsylvania from June 26th through July 1st.

Deaths
2
Events
5

The full record

2012Heat in Texas, June 26, 2012

A 42-year-old male died from a heat stroke in Harker Heights in Bell County. The man was working outside at the time of the stroke. Temperatures were around 105 degrees at the time. Denton County also reported 4 heat related illnesses during the month.

Deaths
1
Injuries
4
Events
2

The full record

2013Heat in Missouri, June 26 to 27, 2013

An upper level ridge of high pressure, allowed hot and humid conditions to prevail across west central Missouri, on June 26th and 27th, 2013. Afternoon heat indices were in the 100 to 106 degrees range.

Deaths
1
Events
5

The full record

2013Excessive Heat in Oklahoma, June 26 to 27, 2013

Unseasonably hot temperatures combined with very high humidity resulted in excessive heat across much of eastern Oklahoma. Temperatures climbed into the mid 90s to near 100 and heat index values ranged from 105 to 110 degrees.

Injuries
18
Events
23

The full record

2015Excessive Heat in Oregon, June 26 to 28, 2015

A strong upper level ridge of high pressure resulted in hot temperatures across Northwest Oregon. Afternoon temperatures peaked in the low 90s to the low 100s which are around 20 degrees warmer than the seasonal normals.

Deaths
2
Injuries
2
Events
2

The full record

Wildfires

42 on June 26, oldest first.

1990Montosa Fire

The Montosa Fire started on June 26, 1990, in Arizona, and burned 9,073 acres.

When
June 26, 1990
Acres
9,073

The full record

1997George River Fire

The George River Fire was discovered on June 26, 1997, in Alaska, and burned 101,820 acres; the cause was recorded as natural.

When
June 26, 1997
Acres
101,820

The full record

1999Uvgoon Creek 2 Fire

The Uvgoon Creek 2 Fire was discovered on June 26, 1999, in Alaska, and burned 88,345 acres; the cause was recorded as natural.

When
June 26, 1999
Acres
88,345

The full record

2000Chitsia Fire

The Chitsia Fire was discovered on June 26, 2000, in Alaska, and burned 9,330 acres; the cause was recorded as natural.

When
June 26, 2000
Acres
9,330

The full record

2002Wildfire in California, June 26 to 29, 2002

Named the Louisiana fire, it began from a burning car in the Cajon Pass near Pitman Canyon. Fanned by 20 mph winds, it grew to more than 200 acres in two hours and destroyed three residences and three outbuildings. Before the first day was over, 1300 acres had burned.

Injuries
1
Damage
$2.0 million
Events
1

The full record

2004Grayling Fork Fire

The Grayling Fork Fire was discovered on June 26, 2004, in Alaska, and burned 48,307 acres; the cause was recorded as natural.

When
June 26, 2004
Acres
48,307

The full record

2004Nutall Complex (Nutall) Fire

The Nutall Complex (Nutall) Fire was discovered on June 26, 2004, in Graham County, Arizona, and burned 29,400 acres; the cause was recorded as natural.

When
June 26, 2004
Acres
29,400

The full record

2004Square Complex

The Square Complex was discovered on June 26, 2004, in Washington County, Utah, and burned 18,235 acres; the cause was recorded as natural.

When
June 26, 2004
Acres
18,235

The full record

2004Champion Creek Fire

The Champion Creek Fire was discovered on June 26, 2004, in Alaska, and burned 15,591 acres; the cause was recorded as natural.

When
June 26, 2004
Acres
15,591

The full record

2005Upper Tatlawiksuk Fire

The Upper Tatlawiksuk Fire was discovered on June 26, 2005, in Alaska, and burned 29,230 acres; the cause was recorded as natural.

When
June 26, 2005
Acres
29,229.5

The full record

2005King County Creek Fire

The King County Creek Fire was discovered on June 26, 2005, in Alaska, and burned 10,131 acres; the cause was recorded as natural.

When
June 26, 2005
Acres
10,131

The full record

2006Sage Fire

The Sage Fire was discovered on June 26, 2006, in Pershing County, Nevada, and burned 27,052 acres; the cause was recorded as natural.

When
June 26, 2006
Acres
27,052

The full record

2006Sneekee Fire

The Sneekee Fire was discovered on June 26, 2006, in Elko County, Nevada, and burned 10,280 acres; the cause was recorded as natural.

When
June 26, 2006
Acres
10,280.1

The full record

2006North Antelope Fire

The North Antelope Fire was discovered on June 26, 2006, in Elko County, Nevada, and burned 10,219 acres; the cause was recorded as natural.

When
June 26, 2006
Acres
10,219

The full record

2011Las Conchas Fire

The Las Conchas Fire was discovered on June 26, 2011, in Sandoval County, New Mexico, and burned 156,593 acres; the cause was recorded as power generation/transmission/distribution.

When
June 26, 2011
Acres
156,593

The full record

2012Seeley Fire

The Seeley Fire was discovered on June 26, 2012, in Emery County, Utah, and burned 48,986 acres; the cause was recorded as natural.

When
June 26, 2012
Acres
48,986

The full record

2012Dahl Fire

The Dahl Fire was discovered on June 26, 2012, in Musselshell County, Montana, and burned 22,045 acres; the cause was recorded as natural.

When
June 26, 2012
Acres
22,045

The full record

2013Toklat River East Fire

The Toklat River East Fire was discovered on June 26, 2013, in Alaska, and burned 33,279 acres; the cause was recorded as natural.

When
June 26, 2013
Acres
33,279

The full record

2013Tetlin Jct Ridge Fire

The Tetlin Jct Ridge Fire was discovered on June 26, 2013, in Alaska, and burned 20,749 acres; the cause was recorded as natural.

When
June 26, 2013
Acres
20,749

The full record

2015Deepbank Creek Fire

The Deepbank Creek Fire was reported on June 26, 2015, in Yukon-Koyukuk County, Alaska, and burned 31,917 acres; the cause was recorded as natural.

When
June 26, 2015
Acres
31,917

The full record

2015Poorman Creek Fire

The Poorman Creek Fire was reported on June 26, 2015, in Yukon-Koyukuk County, Alaska, and burned 16,869 acres; the cause was recorded as natural.

When
June 26, 2015
Acres
16,869.2

The full record

2015Wapoo Fire

The Wapoo Fire was reported on June 26, 2015, in Yukon-Koyukuk County, Alaska, and burned 10,109 acres; the cause was recorded as natural.

When
June 26, 2015
Acres
10,109.2

The full record

2016Dulbi Flats Fire

The Dulbi Flats Fire was reported on June 26, 2016, in Yukon-Koyukuk County, Alaska, and burned 58,138 acres; the cause was recorded as natural.

When
June 26, 2016
Acres
58,137.8

The full record

2016Hogatza River Fire

The Hogatza River Fire was reported on June 26, 2016, in Yukon-Koyukuk County, Alaska, and burned 52,335 acres; the cause was recorded as natural.

When
June 26, 2016
Acres
52,334.7

The full record

2016High Creek Fire

The High Creek Fire was reported on June 26, 2016, in Yukon-Koyukuk County, Alaska, and burned 14,864 acres; the cause was recorded as natural.

When
June 26, 2016
Acres
14,864.2

The full record

2017Campbell River Fire

The Campbell River Fire was reported on June 26, 2017, in Yukon-Koyukuk County, Alaska, and burned 93,520 acres; the cause was recorded as natural.

When
June 26, 2017
Acres
93,520.3

The full record

2017Tiffany Fire

The Tiffany Fire was reported on June 26, 2017, in Socorro County, New Mexico, and burned 9,200 acres; the cause was recorded as natural.

When
June 26, 2017
Acres
9,200

The full record

2019Foraker Fire

The Foraker Fire was reported on June 26, 2019, in Denali County, Alaska, and burned 49,528 acres; the cause was recorded as natural.

When
June 26, 2019
Acres
49,527.8

The full record

2019Beaver Fire

The Beaver Fire was reported on June 26, 2019, in Fairbanks North Star County, Alaska, and burned 12,970 acres; the cause was recorded as human.

When
June 26, 2019
Acres
12,969.7

The full record

2020Canal Fire

The Canal Fire was reported on June 26, 2020, in Millard County, Utah, and burned 78,065 acres; the cause was recorded as natural.

When
June 26, 2020
Acres
78,065

The full record

2024East Toklat Fire

The East Toklat Fire was reported on June 26, 2024, in Denali County, Alaska, and burned 29,612 acres; the cause was recorded as natural.

When
June 26, 2024
Acres
29,611.8

The full record

2024Little Valley Fire

The Little Valley Fire was reported on June 26, 2024, in Malheur County, Oregon, and burned 17,901 acres; the cause was recorded as natural.

When
June 26, 2024
Acres
17,900.8

The full record

2024Coonskin Fire

The Coonskin Fire was reported on June 26, 2024, in Owyhee County, Idaho, and burned 13,074 acres; the cause was recorded as natural.

When
June 26, 2024
Acres
13,074

The full record

2026Babylon Fire

The Babylon Fire was a large wildfire that burned in the southeastern part of Utah. It was contained on August 12, 2026, having burned 107,189 acres.

Where
United States
Country
United States

From Wikipedia, CC BY-SA 4.0.

The full record

2026Babylon Fire

The Babylon Fire was reported on June 26, 2026, in San Juan County, Utah, and burned 107,189 acres; the cause was recorded as natural.

When
June 26, 2026
Acres
107,189

The full record

2026Cherry Fire

The Cherry Fire was reported on June 26, 2026, in Juab County, Utah, and burned 34,221 acres; the cause was recorded as natural.

When
June 26, 2026
Acres
34,221.4

The full record

2026Snyder Fire

The Snyder Fire was reported on June 26, 2026, in Grand County, Utah, and burned 28,264 acres; the cause was recorded as natural.

When
June 26, 2026
Acres
28,264

The full record

2026Wild Goose Fire

The Wild Goose Fire was reported on June 26, 2026, in Millard County, Utah, and burned 12,665 acres.

When
June 26, 2026
Acres
12,665

The full record

Earthquakes

17 on June 26, oldest first.

Volcanoes

2 on June 26, oldest first.

Tsunamis

10 on June 26, oldest first.

1941June 26, 1941 Tsunami at Andaman Sea, E. Coast India

A tsunami caused by a magnitude 8 earthquake struck Andaman Sea, E. Coast India, with a maximum water height of 1.5 meters. It killed few people (about 1 to 50) and did extreme (about $25 million or more) damage.

When
June 26, 1941
Magnitude
8
Water height
1.5 m
Deaths
Few (about 1 to 50)
Where
Andaman Sea, E. Coast India

The full record

Space weather and aurora

6 on June 26, oldest first.

2025G1 (Minor) Geomagnetic Storm of June 26, 2025

A G1 (minor) geomagnetic storm began June 26, 2025, reached Kp 5+ and lasted 6 hours, with a daily Ap as high as 29; at that Kp the aurora may be seen from about 58 degrees geomagnetic latitude.

When
June 26 to 27, 2025
Peak Kp
5+
Storm level
G1

The full record

Billion-dollar disasters

1 on June 26, oldest first.

1989Tropical Storm Allison (June 1989)

A tropical cyclone disaster that cost $1.5 billion in 2024 dollars and killed 11, on NOAA’s billion-dollar list. It lasted from June 26, 1989 to June 28, 1989.

Losses (2024 dollars)
$1.5 billion
Kind
Tropical Cyclone
Deaths
11

The full record

Other weather

14 on June 26, oldest first.

1997Dense Fog in Colorado, June 26, 1997

A woman was killed when she pulled in front of an oncoming tractor trailer just northwest of Berthoud. Dense fog had reduced visibility to less than 100 yards at the time of the accident.

Deaths
1
Events
1

The full record

1997Lightning Strike in Maryland, June 26, 1997

A thunderstorm with frequent lightning started a fire that destroyed eight condominiums and damaged eight others in Easton. Five persons were injured, including two firefighters, and as many as 30 persons were left homeless. Damage was estimated at one million dollars.

Injuries
5
Damage
$1.0 million
Events
1

The full record

2002Lightning Strike in Alabama, June 26, 2002

Lightning was believed to be responsible for a fire in a mobile home in the Shiloh community between Hamilton and Hackleburg of SR 187. Three children were killed and two adults and two other children were injured in the fire.

Deaths
3
Injuries
4
Damage
$40,000
Events
1

The full record

Every day of the year

Sources

Gathered from this site’s archives: the tornado record (NOAA SPC, and Grazulis before 1950), IBTrACS and the National Hurricane Center, NOAA NCEI’s Storm Events Database, Regional Snowfall Index, billion-dollar disasters list, State Climate Extremes Committee and hazard databases, USGS, NIFC, GFZ Potsdam’s Kp index (CC BY 4.0), the National Weather Service in Norman, Oklahoma, and Wikidata (CC0), with article leads from Wikipedia under CC BY-SA 4.0, each credited where it appears. Rebuilt 2026-09-24.