Every tornado, hurricane, flood, blizzard, heat wave, record, earthquake, eruption, tsunami, wildfire and geomagnetic storm on record for August 11, in any year, each linked to its full record.
Every event with a place, colored by kind. Tap one to open its record.
By deaths, damage and strength together, across every archive.
Earthquakes
A magnitude 6.5 earthquake struck Ahar, Haris, Varzagan, Iran. It killed 306 people, injured 3,000 and did $599 million in damage.
Earthquakes
An earthquake struck Barbados, Saint Vincent, Dominica, Antigua. It killed 3,000 people and did severe (about $5 to $25 million) damage.
Tornadoes
A slow moving low pressure system brought widespread showers and thunderstorms to the area. The system tapped into deep tropical moisture resulting in very intense rainfall across a large portion of the area.
Floods
Floods in Turkey occur frequently, affecting various regions, particularly those with riverine areas and prolonged heavy rainfall. According to the Turkish Disaster Database, between 1960 and 2014, Turkey experienced 1,076 flood events, resulting in 795 fatalities and economic damages estimated at approximately $800 million.
From Wikipedia, CC BY-SA 4.0.
Billion-dollar disasters
A flooding disaster that cost $1.4 billion in 2024 dollars and killed 2, on NOAA’s billion-dollar list. It lasted from August 11, 2014 to August 13, 2014.
Hurricanes and tropical storms
Hurricane Nina reached its peak of 160 kt (185 mph) with a central pressure of 960 mb, a category 5 storm.
Hurricanes and tropical storms
Hurricane Betty reached its peak of 140 kt (160 mph) with a central pressure of 890 mb, a category 5 storm.
Tornadoes
An F4 tornado touched down in Stutsman County, North Dakota and tracked 1 miles, 300 yards wide at its widest.
Hurricanes and tropical storms
Hurricane Erin crossed the coast near Mindelo, Sao Vicente, Cabo Verde as a tropical storm, 35 kt, central pressure 1006 mb. It killed 13 people in all, by the National Hurricane Center’s count. Hurricane Erin was a very large, long-lived, and powerful Cape Verde hurricane that crossed the Atlantic Ocean in August 2025. The fifth named storm, first hurricane, first major hurricane, and first Category 5 hurricane of the 2025 Atlantic hurricane season, Erin developed from a tropical wave on August 11, while passing westward over Cape Verde.
From Wikipedia, CC BY-SA 4.0.
Billion-dollar disasters
A severe storm disaster that cost $1.8 billion in 2024 dollars, on NOAA’s billion-dollar list. It lasted from August 11, 2023 to August 11, 2023.
Tornadoes
An F3 tornado touched down in Lenoir, Greene counties, North Carolina and tracked 10.3 miles, 150 yards wide at its widest, killing 1 and injuring 8. From Grazulis's record of significant tornadoes: Hookerton, NC.
Tornadoes
Around lunch time, a tornado touched down in the southwest portions of Salt Lake City. The tornado intensified to an F2 on the Fujita scale, and moved northeast through the metropolitan area of Salt Lake City.
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An F2 tornado touched down in Avoyelles Parish, Louisiana and tracked 2.4 miles, killing 1 and injuring 3. From Grazulis's record of significant tornadoes: SW Marksville, LA.
An F3 tornado touched down in Lenoir, Greene counties, North Carolina and tracked 10.3 miles, 150 yards wide at its widest, killing 1 and injuring 8. From Grazulis's record of significant tornadoes: Hookerton, NC.
An F2 tornado touched down in Aroostook County, Maine and tracked 1 miles, 27 yards wide at its widest, killing 1 and injuring 1.
An F3 tornado touched down in Grand Forks County, North Dakota and tracked 0.1 miles, 10 yards wide at its widest, injuring 2.
An F3 tornado touched down in Duchesne County, Utah and tracked 17 miles, 880 yards wide at its widest.
Thunderstorms that developed over the northeast portion of Utah produced a high elevation tornado, large hail, and microburst winds. The tornado occurred in the extreme eastern portion of the county in the Ashley National Forest.
Around lunch time, a tornado touched down in the southwest portions of Salt Lake City. The tornado intensified to an F2 on the Fujita scale, and moved northeast through the metropolitan area of Salt Lake City.
An F2 tornado touched down in Salt Lake County, Utah and tracked 4.3 miles, 150 yards wide at its widest, killing 1 and injuring 80.
On August 11, 1999, a rare and strong F2 tornado struck Downtown Salt Lake City, Utah, United States. It was among the most notable tornadoes to hit west of the Great Plains in the 20th century and the only recorded tornado to hit in Utah that resulted in a fatality.
From Wikipedia, CC BY-SA 4.0.
Woman struck by lightning while on boat.
An F4 tornado touched down in Stutsman County, North Dakota and tracked 1 miles, 300 yards wide at its widest.
The tornado formed 5 miles north of Medina, over open country, traveling slowly to the north...northeast. One farmstead was totally destroyed and the second farmstead suffered moderate damage.
A severe thunderstorm moved southward across northern Lee County and produced severe winds as it approached Lexington. The damaging winds knocked down several trees in the area.
An EF3 tornado touched down in Cherry County, Nebraska and tracked 0.52 miles, 900 yards wide at its widest.
Severe thunderstorms developed in north central Nebraska on the afternoon of August 11th in the vicinity of a warm front draped from southwest South Dakota into northeast Nebraska. The storms quickly became tornadic with six tornados occurring by the end of the evening.
A QLCS tornado briefly spun up in Wilson County as it encountered a moist and moderately unstable air mass in place across eastern North Carolina.
A severe thunderstorm developed over the central Black Hills and slowly moved south through the southern Black Hills. The storm produced large hail from Silver City to near Hot Springs and a small tornado south of Hill City, which downed many trees and produced minor damage.
A slow moving low pressure system brought widespread showers and thunderstorms to the area. The system tapped into deep tropical moisture resulting in very intense rainfall across a large portion of the area.
A significant severe weather event occurred across the Tri-State Region on the evening of August 11th, 2019. Widespread damaging winds, heavy rainfall, and flash flooding was reported to NWS Goodland. In addition, a few tornadoes occurred along with some large hail.
A significant severe weather event occurred across the Tri-State Region on the evening of August 11th, 2019. Widespread damaging winds, heavy rainfall, and flash flooding was reported to NWS Goodland. In addition, a few tornadoes occurred along with some large hail.
Severe storms produced numerous reports of wind gusts up to around 60 mph that brought down numerous trees and tree limbs. In addition an EF-0 tornado struck near Dorr in Allegan county.
Numerous showers and thunderstorms filtered in across portions of Southeast Michigan through the evening of August 11, 2023.
29 tornadoes were recorded on August 11, 2026, in Indiana, Iowa, Ohio, Illinois, Kentucky.
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An unnamed storm crossed the coast as a category 3 hurricane, 110 kt (125 mph).
An unnamed storm crossed the coast as a category 1 hurricane, 70 kt (80 mph).
An unnamed storm crossed the coast as a category 1 hurricane, 65 kt (75 mph).
An unnamed storm crossed the coast near Tybee Island, GA as a category 2 hurricane, 85 kt (100 mph), central pressure 972 mb. The 1940 South Carolina hurricane was a Category 2 hurricane that struck the Georgia and South Carolina coast between August 11 and 12, 1940. After forming north of the Leeward Islands, the storm moved west-northwest, moving east of the Bahamas before resuming a west-northwest track towards the Southeastern United States.
From Wikipedia, CC BY-SA 4.0.
Hurricane Nina reached its peak of 160 kt (185 mph) with a central pressure of 960 mb, a category 5 storm.
Hurricane Betty reached its peak of 140 kt (160 mph) with a central pressure of 890 mb, a category 5 storm.
The 1991 Pacific typhoon season was a slightly above-average season with 29 tropical storms, 17 typhoons and five super typhoons forming. It was quite a catastrophic season – Typhoon Yunya impacted the Philippines in mid June while in the same time experiencing a volcanic eruption, Typhoon Mireille severely impacting Japan, which became known for being the costliest typhoon on record until it was surpassed by Typhoon Doksuri in 2023, and Tropical Storm Thelma on November which became one of…
From Wikipedia, CC BY-SA 4.0.
Hurricane Kent reached its peak of 130 kt (150 mph) with a central pressure of 930 mb, a category 4 storm.
Hurricane Utor reached its peak of 130 kt (150 mph) with a central pressure of 926 mb, a category 4 storm.
Hurricane Lan reached its peak of 120 kt (140 mph) with a central pressure of 932 mb, a category 4 storm.
Hurricane Erin crossed the coast near Mindelo, Sao Vicente, Cabo Verde as a tropical storm, 35 kt, central pressure 1006 mb. It killed 13 people in all, by the National Hurricane Center’s count. Hurricane Erin was a very large, long-lived, and powerful Cape Verde hurricane that crossed the Atlantic Ocean in August 2025. The fifth named storm, first hurricane, first major hurricane, and first Category 5 hurricane of the 2025 Atlantic hurricane season, Erin developed from a tropical wave on August 11, while passing westward over Cape Verde.
From Wikipedia, CC BY-SA 4.0.
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Heavy rain fell within a few hours on ground already saturated from previous rains. Seventy-seven homes, trwnty siz businesses, four public buildings, and three churches were heavily damaged in the Chattanooga suburbs of Red Bank and Hixson.
Torrential rains from thunderstorms dumped between 6 and 8 inches of rain in a 24 hour period. Most of the rain fell between 8 pm on the 11th and 2 am on the 12th.
Large hail, strong winds and torrential rain hammered portions of Lakewood and South Denver. Nearly 1 inch of rain fell in the span of 10 minutes in South Denver with a storm total of 1.81 inches reported.
Thunderstorms moved through the city of Pueblo, producing rainfall amounts of 1 to 2 inches. Streets and intersections throughout the city were flooded, with some areas reporting up to 3 feet of standing water.
A cold front moved across the region during the late afternoon and night of August 11th into the early morning of August 12th. With a warm humid airmass in place, thunderstorms resulted in torrential downpours during the night.
A cold front moved across the region during the late afternoon and night of August 11th into the early morning of August 12th. With a warm humid airmass in place, thunderstorms resulted in torrential downpours during the night.
A cold front moved across the region during the late afternoon and night of August 11th into the early morning of August 12th. With a warm humid airmass in place, thunderstorms resulted in torrential downpours late at night.
A cold front moved across the region during the late afternoon and night of August 11th into the early morning of August 12th. With a warm humid airmass in place, thunderstorms resulted in torrential downpours during the night.
A series of thunderstorms developed and dissipated as they moved very slowly over an area covering East Bridgeport and Stratford. Torrential rain caused widespread serious flash flooding of low lying areas, poor drainage areas, and small streams.
A two year old boy and his parents were killed in a flash flood while hiking in Havasu Canyon. Two other family members had reached the the safety of Havasupai Village before the late night storm hit.
Slow moving thunderstorms with torrential downpours caused flash flooding in Salisbury and Upper Saucon Townships in southeastern Lehigh County. Flooding of Main Street businesses resulted in about 10 million dollars in damage.
Showers and thunderstorms with very heavy downpours formed over the District for the 2nd straight day around 3 PM EDT and remained near stationary over all but far Southeast D.C. through 6 PM.
Showers and thunderstorms with very heavy rainfall and frequent lightning moved across Northern Virginia during the afternoon of the 11th. Over 20,000 customers across Northern Virginia lost power as a direct result of the storms.
Slow moving thunderstorms with torrential rains inundated southwestern Sussex County during the late afternoon of the 11th. Doppler Radar storm total estimates reached 8.4 inches around Seaford.
A cluster of severe thunderstorms dumped large hail in parts of southern Sauk County, and then dissipated.
An isolated slow-moving thunderstorm produced around 2.5 inches of rain in a short period of time in Hornell and Addision causing more flash flooding of streams and creeks.
A cold front moved into a humid airmass over the tri-state area on August 11th. Thunderstorms developed along this cold front during the afternoon. Due to the moist airmass in place over the region, the thunderstorms became quite strong to severe.
Late night thunderstorms trained for about 4 hours along an old outflow boundary. This occurred from about 2200E on the 10th to 0200E on the 11th. The largest rain amounts of 2 to 3.5 inches were concentrated along Huff Creek and its small feeder streams.
An upper level low pressure system moved slowly northeast from central Pennsylvania into east central New York State during Monday, August 11th.
An abnormal mid August weather pattern brought a large area of rain and thunderstorms to a large portion of the region. This activity brought locally heavy rain and some flash flooding to some areas along with a few isolated severe thunderstorms during the afternoon hours.
An upper level low tracked across southern Ontario producing showers and thunderstorms across southern New England. These storms produced a waterspout and very heavy rains resulting in flash flooding in southeastern Massachusetts.
Flash flooding occurred in downtown Mt. Pleasant from the evening hours of August 11th into the early morning hours of August 12th due to approximately four inches of rain which fell in just two and a half to three hours time. A trained spotter one mile south of downtown Mt.
The 2011 Sindh floods was the highest-ever recorded rainfall between 11 August 2011, and 14 September 2011 in Sindh Province, Pakistan.
From Wikipedia, CC BY-SA 4.0.
Scattered severe thunderstorms developed across areas on the Caprock and southwestern Texas Panhandle during the early evening hours. Many of the initial storms developed on an outflow boundary that moved into the area from an early morning MCS in the central Texas Panhandle.
A historic rainfall event unfolded over Southeast Michigan on Monday, August 11, leading to major flooding and road closures. This event was caused by a strengthening low pressure system moving over the area, focusing the tropical moisture which came up from the south.
A slow moving low pressure system brought multiple rounds of widespread showers and thunderstorms to the area. The system tapped into deep tropical moisture resulting in very intense rainfall across a large portion of the area.
Widespread showers and thunderstorms developed late in the evening of August 11th and continued overnight into August 12th along and ahead of a cold front that moved southeastward across Iowa. These showers and thunderstorms produced very heavy rainfall across eastern Iowa.
A stalled stationary boundary within a very moist airmass provided a focusing mechanism for several rounds of heavy rain that resulted in widespread flash flooding across northeast New Jersey.
Floods in Turkey occur frequently, affecting various regions, particularly those with riverine areas and prolonged heavy rainfall. According to the Turkish Disaster Database, between 1960 and 2014, Turkey experienced 1,076 flood events, resulting in 795 fatalities and economic damages estimated at approximately $800 million.
From Wikipedia, CC BY-SA 4.0.
An upper level low sitting over central Arizona on the 11th and 12th led to the development of multiple rounds of showers and thunderstorms across the region.
Despite a somewhat nebulous synoptic regime, with modest zonal upper flow across the southern Plains, widespread thunderstorm development emerged during the early morning of the 11th.
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A local newspaper reported downed trees and power lines. Half of the bleacher seats at the high school football field were ripped out of place and left twisted on the field. A 75-foot-hole was also torn in the ceiling of a Wal-Mart store.
Power lines were knocked down due to thunderstorm winds.
A marketing research company had its roof removed by strong winds. Heavy rain penetrated the building through the damaged roof and damaged or destroyed all the equipment inside including computer equipment and other electronic machines.
Eyewitnesses claimed a lightning bolt directly struck a 41 year old woman as she was on an early morning jog along a street in Manhattan. She never regained consciousness and died 16 days later at a local hospital.
A combination of large hail and high winds in northern Perkins county resulted in nearly total losses in crops, and significant damage to vehicles and buildings in the Lemmon area.
Tree branches were blown off in the Maddock area.
A severe thunderstorm brought damaging winds and hail to central portions of Dawson County. The areas hardest hit extended from Lindsay to Bloomfield. In many areas crops were a total loss. Several barns were blown down damaging equipment and machinery.
Two clusters of severe thunderstorms rolled across south-central Nebraska during the evening and early morning hours. One storm system produced high winds in Harlan and Furnas counties. Near Republican City, a wind gust to 77 mph was reported.
Numerous power poles and large trees were broken off. One tree fell on a carport damaging a pickup truck.
A 2 foot diameter oak tree was blown down at the stadium and numerous 8 to 10 inch diameter limbs broken. Light poles at the stadium were also blown down.
Barn and grain silo destroyed. Debris from the destroyed barn "helped" to knock over a nearby power pole. (El Dorado Times).
Severe thunderstorm winds, estimated as high as 80 miles per hour, struck Austin, causing extensive damage along the Walnut Creek Greenway and in an area bounded by Parmer Lane, Dessau Lane, Metric Lane and IH-35.
Severe storms developed during the afternoon and early evening hours of August 11th through August 13th.
A second round of thunderstorms developed across the central deserts during the evening hours on August 11th, and some of them affected both the greater Phoenix metropolitan area as well as portions of northern Pinal county.
This event was a two part event for many. Initially, storms developed in the Dakotas near the parent cold front, and proceeded to develop into an MCS and move into and across Iowa during the morning hours of the 11th.
An isolated severe thunderstorm moved across northeast Aroostook county during the early morning hours of the 11th in advance of a cold front. The storm produced large hail which dented vehicles and broke windows in the Caribou area.
The center of upper level high pressure shifted east into Texas on the 11th and allowed a deep tap of moisture to spread north into New Mexico. Atmospheric moisture values over the region surged to the highest levels of the season.
A southeast low-level surface flow advected very moist air from the central plains westward across southeast and south-central Montana. Dewpoints were in the 50s to lower 60s across the Billings Forecast Area.
The late evening of Sunday the 11th into the early morning of Monday the 12th featured a rather perplexing thunderstorm complex within South Central Nebraska, as what appeared to be a favorable setup for potentially widespread damaging winds ended up yielding only one localized…
A lee pressure trough and weak cold front combined to ignite numerous thunderstorms in a strongly unstable environment. The strongest thunderstorms produced severe wind gusts and sporadic hail.
A line of severe thunderstorms moved across northern Illinois during the late morning of August 11th producing wind damage in many areas. Winds gusted to near severe limits for as much as 20 minutes in some areas behind the line of storms.
Convection initiated in Central Illinois and developed into a convective line as it approached Indiana. Thunderstorms developed in the warm sector ahead of the initial line and produced multiple outflow interactions.
A lee pressure trough and weak cold front combined to ignite numerous thunderstorms in a strongly unstable environment. The strongest thunderstorms produced severe wind gusts and sporadic hail.
As the slow moving Low continued through the region, another round of thunderstorms over the Eastern Washington produced large hail and strong winds to the region. The storms impacted extreme Eastern WA and the North ID Panhandle.
On August 11, 2023 an unstable air mass with ample deep layer shear supported numerous supercell thunderstorms during the afternoon and evening. These storms produced widespread large hail, along with some damaging wind. A few reports were for greater than 2 inch hail.
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The warmest August temperature ever recorded in both Oklahoma City and Wichita Falls occurred on August 11, 1936, when both cities reach a very hot 113 degrees. Since then, Wichita Falls tied this record on August 6, 1964 and Oklahoma City tied it on August 3, 2012.
From the National Weather Service in Norman, Oklahoma.
Two people died outdoors from heat exposure.
The longest run of days with high temperatures of 90 or greater this summer occurred across Eastern Pennsylvania from the 11th through the 20th. This was the longest heat wave for the state since the twelve day heat wave during the summer of 1999.
The longest run of days with high temperatures of 90 or greater for the summer occurred across central and southern New Jersey from the 11th through the 20th. This was the longest heat wave for the state since the twelve day heat wave during the summer of 1999.
The last prolonged run of excessive heat of the summer matched the late July one for both temperatures and relative humidity levels.
A heat wave produced heat indicies of 100-110 over the area. A 69 year old woman in Burke county died of heat stroke.
One person died in Las Vegas of heat-related causes.
A period of very hot and humid conditions occurred with highs each day into 90's. The cumulative effect of the heat resulted in some heat related deaths and injuries.
Ridge of high pressure lead to hot temperatures across Northwest Oregon.
Four people died of heat related causes in the Las Vegas Valley.
Seven people died in Las Vegas of heat related causes.
Hot weather began to develop August 9, peaking August 11-12, but temperatures continued above normal into the weekend. Peak afternoon temperatures of 100 to 105 degrees drove people to seek relief in or near bodies of water.
In the midst of a prolonged heat wave affecting the region, dangerous heat and humidity caused a fatality in southeast Mississippi on August 11th.
A ridge of high pressure in the middle and upper atmosphere developed over the south central United States during mid August.
The combination of above average temperatures and above average dewpoints resulted in high heat index values in excess of 113 over a large portion of northwest Florida during the August 11-15 time period.
Two people died in Las Vegas of heat-related causes.
Hot temperatures and high humidity combined to create dangerous heat indices (in excess of 105 to 110-degrees) across the western two-thirds of Oklahoma during the afternoon and evening of 11th to 16th.
High pressure slowly strengthening overhead pushed temperatures in the Mojave Desert to dangerous levels.
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The Air Force Fire started on August 11, 1984, in Idaho, and burned 9,720 acres.
The Joseph Canyon 1 Fire started on August 11, 1986, in Washington, and burned 14,387 acres.
The Hand Meadows Fire started on August 11, 1986, in Idaho, and burned 10,977 acres.
The Little Granite Fire started on August 11, 1986, in Idaho, and burned 10,967 acres.
The Freeman Trail Fire started on August 11, 1988, in Idaho, and burned 19,497 acres.
The Usaf 4 Fire started on August 11, 1988, in Nevada, and burned 14,691 acres.
The Chicken Complex was discovered on August 11, 1994, in Idaho, and burned 84,677 acres; the cause was recorded as natural.
The Cornish Fire was discovered on August 11, 1994, in Idaho, and burned 12,568 acres; the cause was recorded as natural.
The Fork Fire was discovered on August 11, 1996, in California, and burned 83,323 acres; the cause was recorded as arson/incendiarism.
The Applevalle Fire was discovered on August 11, 1996, in Idaho, and burned 9,748 acres; the cause was recorded as human.
The Maloney Creek Fire was discovered on August 11, 2000, in Idaho County, Idaho, and burned 64,510 acres; the cause was recorded as natural.
The Salmon Challis Wilderness Complex (Little Pistol) Fire was discovered on August 11, 2000, in Idaho, and burned 63,760 acres; the cause was recorded as natural.
The Sheep Mt Fire was discovered on August 11, 2000, in Sweetwater County, Wyoming, and burned 36,645 acres; the cause was recorded as natural.
The Stone Young (Stone Hill) Fire was discovered on August 11, 2000, in Montana, and burned 11,115 acres; the cause was recorded as natural.
The Beaver Creek Fire was discovered on August 11, 2000, in Gallatin County, Montana, and burned 10,800 acres; the cause was recorded as natural.
The Kootenai Complex (Upper Beaver) Fire was discovered on August 11, 2000, in Montana, and burned 9,423 acres; the cause was recorded as natural.
The Yellowpine Complex (Indian and Prospect) Fire was discovered on August 11, 2000, in Idaho, and burned 9,371 acres; the cause was recorded as natural.
An arson caused fire consumed 500 acres of rugged brush covered hills, a garage, a utility trailer, and two 25 gallon water storage tanks before being brought under control. About 150 people from Calimesa and Cherry Valley evacuated. Homes in Yucaipa were also threatened.
The East Fire was discovered on August 11, 2003, in Wyoming, and burned 18,762 acres; the cause was recorded as natural.
The Withington Fire was discovered on August 11, 2003, in Idaho, and burned 10,567 acres; the cause was recorded as natural.
The Bear Fire was discovered on August 11, 2004, in California, and burned 10,484 acres; the cause was recorded as equipment and vehicle use.
The Cleveland Fire was discovered on August 11, 2007, in Franklin County, Idaho, and burned 13,784 acres; the cause was recorded as human.
The Mitchell Fire was discovered on August 11, 2007, in Power County, Idaho, and burned 9,473 acres; the cause was recorded as equipment and vehicle use.
The Frying Pan Fire was reported on August 11, 2014, in Siskiyou County, California, and burned 109,439 acres; the cause was recorded as natural.
The Windy Ridge Fire was reported on August 11, 2015, in Baker County, Oregon, and burned 103,811 acres; the cause was recorded as natural.
The Kettle Complex was reported on August 11, 2015, in Ferry County, Washington, and burned 76,512 acres; the cause was recorded as natural.
The Stickpin Fire was reported on August 11, 2015, in Ferry County, Washington, and burned 54,354 acres.
The Bendire Complex was reported on August 11, 2015, in Malheur County, Oregon, and burned 34,744 acres.
The Eagle Fire was reported on August 11, 2015, in Baker County, Oregon, and burned 12,716 acres; the cause was recorded as natural.
The Jolly Mountain fire was a wildfire in Wenatchee National Forest, Kittitas County, Washington, that began with lightning strikes August 11, 2017 and burned for over three months. Fires burned in the upper reaches of the Teanaway River a few miles east of Cle Elum Lake.
From Wikipedia, CC BY-SA 4.0.
The Norse Peak Fire was reported on August 11, 2017, in Yakima County, Washington, and burned 52,056 acres.
The Umpqua North Complex was reported on August 11, 2017, in Douglas County, Oregon, and burned 43,158 acres.
The Jolly Mountain Fire was reported on August 11, 2017, in Kittitas County, Washington, and burned 36,808 acres.
The Caribou Fire was reported on August 11, 2017, in Lincoln County, Montana, and burned 24,753 acres; the cause was recorded as natural.
The Milli 0843 Cs Fire was reported on August 11, 2017, in Deschutes County, Oregon, and burned 24,025 acres; the cause was recorded as natural.
The Tank Hollow Fire was reported on August 11, 2017, in Utah County, Utah, and burned 11,067 acres; the cause was recorded as natural.
The Crucifixion Creek Fire was reported on August 11, 2017, in Pondera County, Montana, and burned 11,003 acres; the cause was recorded as natural.
Very dry conditions over Eastern Washington during July and August created dry fuel conditions across the region. Scattered dry thunderstorms moving through the region during the morning of August 11th triggered an estimated 20 new fire starts in the mountains north of Twisp.
The Boyds Wildfire on the west side of Lake Roosevelt near Kettle Falls began on August 11th from an unknown cause and eventually consumed 4712 acres of timber and brush.
The Grass Valley Wildfire near Grand Coulee began on August 11th from an unknown cause and quickly spread on breezy winds to consume 74,835 acres of grass and scrub land, threatening the nearby towns of Grand Coulee and Electric City by the afternoon of August 12th.
The Grass Valley Fire was reported on August 11, 2018, in Douglas County, Washington, and burned 75,573 acres.
The Mcleod Fire was reported on August 11, 2018, in Okanogan County, Washington, and burned 24,411 acres.
The Howe Ridge Fire was reported on August 11, 2018, in Flathead County, Montana, and burned 14,522 acres; the cause was recorded as natural.
The Bear Creek Fire was reported on August 11, 2020, in Beaverhead County, Montana, and burned 12,150 acres; the cause was recorded as natural.
The Bedrock Fire was reported on August 11, 2021, in Nez Perce County, Idaho, and burned 11,167 acres; the cause was recorded as human.
Lightning started the White River Wildfire in the Cascades.
Lightning started the Irving Peak Wildfire in the Cascades.
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An earthquake struck Barbados, Saint Vincent, Dominica, Antigua. It killed 3,000 people and did severe (about $5 to $25 million) damage.
An earthquake struck Valparaiso, Chile. It caused a tsunami.
An earthquake struck SE. Alaska, Alaska, United States. With the tsunami it caused, it killed 5 people.
A magnitude 7.8 earthquake struck Mitata (Kythera), Greece. It killed 2 people and did severe (about $5 to $25 million) damage.
A magnitude 6.1 earthquake struck Samos, Patmos, Greece. It killed 4 people, destroyed 540 houses and did severe (about $5 to $25 million) damage.
A magnitude 6.5 earthquake struck Yilan, Taiwan. It killed 3 people and destroyed 6 houses.
A magnitude 6.8 earthquake struck Asprogerakas (Kephallenia), Greece. It caused a tsunami.
An earthquake struck SE. Hokkaido Island, Japan. It caused a tsunami.
A magnitude 7.6 earthquake struck Vanuatu Islands. It caused a tsunami.
A magnitude 8.2 earthquake struck Shikotan Island, Kurilskiye, Russia. It caused a tsunami.
A magnitude 4.7 earthquake struck Perugia, Italy. It injured 4.
A magnitude 7.5 earthquake struck Solomon Islands.
A magnitude 6.1 earthquake struck S, Mamasani, Bushehr, Nurabad, Iran. It killed 1 person.
A magnitude 4.4 earthquake struck Pamasqui, Quito, Ecuador. It killed 4 people, injured 10 and did severe (about $5 to $25 million) damage.
A magnitude 6.3 earthquake struck S, Honshu, Japan. It caused a tsunami.
A magnitude 6 earthquake struck Wasile, Halmahera, Indonesia.
A magnitude 5.7 earthquake struck Elazig, Sivrice, Turkey. It killed 1 person and injured 11.
A magnitude 5.2 earthquake struck Cariaco-Cumana, Venezuela.
A magnitude 5.7 earthquake struck Southern, Kashi, Xinjiang Province, China. It injured 21.
A magnitude 6.5 earthquake struck Ahar, Haris, Varzagan, Iran. It killed 306 people, injured 3,000 and did $599 million in damage.
A magnitude 5.7 earthquake struck Qamdo, Tibet (Xizang Province), China.
A magnitude 5.6 earthquake struck Arequipa, Peru. It killed 1 person.
A magnitude 7.1 earthquake struck Mindanao, Philippines. It killed 1 person. It caused a tsunami.
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Katla, Iceland erupted with a Volcanic Explosivity Index of 4.
Taal, Philippines erupted with a Volcanic Explosivity Index of 3. It killed few people (about 1 to 50) and did severe (about $5 to $25 million) damage. The eruption caused a tsunami and was accompanied by an earthquake.
Vesuvius, Italy erupted with a Volcanic Explosivity Index of 2. It killed 4 people.
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A tsunami caused by a magnitude 6.6 earthquake struck Marmara Sea, Turkey.
A tsunami with a source recorded as earthquake struck Central Chile.
A tsunami struck Sydney Harbor, Australia.
A tsunami with a source recorded as earthquake and landslide struck Lituya Bay, AK, United States. It killed 5 people.
A tsunami caused by a magnitude 6.8 earthquake struck Ionian Sea, Greece, with a maximum water height of 1 meters.
A tsunami caused by a magnitude 7 earthquake struck SE. Hokkaido Island, Japan, with a maximum water height of 0.1 meters.
A tsunami caused by a magnitude 7 earthquake struck Vanuatu Islands, with a maximum water height of 7 meters.
A tsunami caused by a magnitude 8.2 earthquake struck S. Kuril Islands, Russia, with a maximum water height of 5 meters.
A tsunami caused by a magnitude 6.3 earthquake struck Honshu, Japan.
A tsunami caused by a magnitude 7.1 earthquake struck Mindanao Island, Philippines, with a maximum water height of 0.05 meters. It killed 1 person.
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A G4 (severe) geomagnetic storm began August 11, 1939, reached Kp 8- and lasted 33 hours, with a daily Ap as high as 88; at that Kp the aurora may be seen from about 47 degrees geomagnetic latitude.
A G4 (severe) geomagnetic storm began August 11, 2024, reached Kp 8 and lasted 36 hours, with a daily Ap as high as 127; at that Kp the aurora may be seen from about 45 degrees geomagnetic latitude.
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A flooding disaster that cost $1.4 billion in 2024 dollars and killed 2, on NOAA’s billion-dollar list. It lasted from August 11, 2014 to August 13, 2014.
A severe storm disaster that cost $1.8 billion in 2024 dollars, on NOAA’s billion-dollar list. It lasted from August 11, 2023 to August 11, 2023.
15 on August 11, oldest first.
Lightning struck a man while working in his tobacco field in the Wirmingham community. A bolt of lightning struck him in the back of his head. The lightning bolt also knocked down 2 others nearby.
A lightning strike killed a 29-year-old man while he was crabbing with his father on the Oranoaken Creek in the Egg Island Wildlife Management Area in Downe Township. They were in a non-motorized crabbing boat when the thunderstorm struck.
Eleven people were injured when lightning struck during a burial ceremony at a cemetery.
Two men were struck by lightning from an early morning thunderstorm while fishing at East Matunuck State Beach in Narragansett. They were trying to find shelter when they were hit, according to media reports.
A 19 year old male was struck and killed by lightning while jogging around the track at Hot Springs Middle School.
The afternoon sea breeze triggered thunderstorms over coastal Florida.
Early morning thunderstorms caused major lightning damage to a beach front home in the Inlet Beach area.
A 64 year old woman drowned due to a rip current on Ocracoke Island.
Dangerous rip current conditions over the Alabama coastal waters resulted in 2 deaths.
Four people needed to be rescued after a sandbar collapsed at Big Traverse Bay Beach and a strong current swept the people out into Lake Superior.
A 45 year old man was pulled from Lake Michigan near Grant Park in the early evening of August 11th. The man was taken to a hospital in critical condition where he died. North winds allowed waves to build to around 4 feet at the nearby Chicago buoy.
A stalled frontal boundary was the focus for storms that produced lightning that caused a church fire in Barnwell.
Residual 4 to 5 ft swells from the passage of Tropical Depression Debby well to the north and west of the region on Friday August 9th, resulted in a moderate to high risk for rip current development along eastern Long Island ocean beaches.
A surface high pressure across the North Atlantic promoted a moderate to locally fresh easterly wind flow, creating localized choppy conditions.
Multiple days of onshore flow had resulted in elevated rip current risk across the region. There had been a moderate or high risk from July 31 through August 12. Several area beach patrols reported a much higher than average number of rescues.
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.