312 articles
Damage indicator (tornado)
A damage indicator (DI) is one of 28 standardized structures, trees, or objects used to rate tornado intensity on the Enhanced Fujita (EF) scale, operational since 2007.
Daulatpur–Saturia tornado
The Daulatpur–Saturia tornado struck the Manikganj district of central Bangladesh on April 26, 1989, killing an estimated 1,300 people, the deadliest tornado in world records.
December 1983 cold wave
The December 1983 cold wave, also called the Great Freeze of '83, was an Arctic outbreak that set record lows across the United States and killed at least 151 people.
December 2009 North American blizzard
The December 2009 North American blizzard was a nor'easter that dropped up to 30 inches of snow on the East Coast from December 18 to 20, 2009.
Derecho
A derecho is a widespread, long-lived windstorm produced by a band of rapidly moving thunderstorms, causing straight-line wind damage along paths hundreds of miles long.
Disagreements on the intensity of tornadoes
Disagreements on the intensity of tornadoes, also known as tornado rating controversies, arise because tornado winds are inferred from damage, so different scales like the Fujita and TORRO systems assign different ratings.
Dragon Bravo Fire
Dragon Bravo Fire was a 2025 lightning-caused wildfire in Grand Canyon National Park. It burned for nearly three months, destroying the Grand Canyon Lodge, and killed one firefighter.
Dust storm
A dust storm, or sandstorm, is a weather event where strong winds lift sand and dust from dry soil, often forming a miles-long wall of dust.
East Troublesome Fire
The East Troublesome Fire was a 2020 wildfire that began near Kremmling, Colorado, and burned 193,812 acres across Grand County and Rocky Mountain National Park, the second-largest fire in Colorado's recorded history.
EF5 drought
The EF5 drought, also called the EF5 gap, was the period from 2013 to 2025 with no EF5-rated US tornadoes, the longest since records began in 1950.
Emergency Alert System
The Emergency Alert System (EAS) is the United States' national broadcast alerting system, established in 1997 to relay emergency messages from federal, state, and local authorities to the public.
Emergency Broadcast System
The Emergency Broadcast System (EBS) was the United States' national emergency alerting system for radio and television from 1963 to the 1990s, established by President Kennedy.
Enhanced Fujita scale
The Enhanced Fujita scale (EF scale) rates tornado intensity from EF0 to EF5 based on damage; it has been used by the US National Weather Service since 2007.
European windstorm
A European windstorm is an intense extratropical cyclone that brings damaging surface winds to Europe, forming over the North Atlantic and ranking among the continent's costliest natural hazards.
Explosive cyclogenesis
Explosive cyclogenesis, sometimes called bombogenesis, is the rapid deepening of an extratropical cyclone; the resulting storm is colloquially called a bomb cyclone, with hurricane-force winds.
Extratropical cyclone
An extratropical cyclone, also called a mid-latitude or frontal cyclone, is a low-pressure storm system driven by horizontal temperature contrasts, and it brings most fall-to-spring weather in temperate zones.
Extratropical transition
Extratropical transition (ET) is the gradual process by which a tropical cyclone at higher latitudes becomes an extratropical cyclone, its energy shifting from latent heat to temperature contrasts, often while retaining strong winds.
Extreme Cold
Extreme cold: temperatures far below local historical averages that endanger people, animals, and infrastructure. Driven by polar vortex and cold air damming; causes hypothermia below 95°F and frostbite; higher mortality risk than extreme heat.
February 13–17, 2021, North American winter storm
Winter Storm Uri, a February 2021 winter storm and Arctic outbreak, brought record cold and snow to the central United States and collapsed the Texas power grid.
February 2006 North American blizzard
The February 2006 North American blizzard was a powerful nor'easter that moved up the East Coast on February 11 and 12, 2006, setting New York City's record snowfall of 26.9 inches.
February 2007 North American blizzard
The February 2007 North American blizzard was a major winter storm that crossed the United States from February 12 to 14, 2007, causing at least 15 deaths.
February 2013 North American blizzard
The February 2013 North American blizzard, also known as Winter Storm Nemo, buried the northeastern United States under up to 40 inches of snow on February 8 and 9, 2013.
February 2026 North American blizzard
The February 2026 North American blizzard, or Winter Storm Hernando, comprised two severe storms, including the Blizzard of 2026 that gave Providence its largest snowstorm on record.
Fire whirl
A fire whirl, also called a fire devil or firenado, is a spinning vortex of hot air and flame rising from a fire, with large whirls having tornado-like intensity.
Firestorm
A firestorm is a fire so intense that it generates its own wind system, sustaining and spreading the flames, sometimes producing its own pyrocumulonimbus cloud, lightning, and tornadoes.
Flash flood warning
A flash flood warning is an official alert that flash flooding is in progress, imminent, or highly likely, issued in the United States by the National Weather Service.
Fujita scale
The Fujita scale, also known as the Fujita-Pearson scale, rates tornado intensity from F0 to F5 by damage caused. It was introduced in 1971 by Tetsuya Theodore Fujita and used in the United States until 2007.
Gale warning
A gale warning is a marine weather warning issued for sustained winds, or frequent gusts, of 34 to 47 knots over water, excluding winds from tropical cyclones.
Great Blizzard of 1888
The Great Blizzard of 1888, also called the Great White Hurricane, struck the northeastern United States from March 11 to 14, 1888, killing hundreds of people.
Great Blizzard of 1978
The Great Blizzard of 1978 was a severe winter storm that struck the Great Lakes and Ohio Valley on January 26-27, 1978, paralyzing Ohio, Indiana, and Michigan.