# List of severe weather phenomena

Severe weather phenomena are weather conditions that are hazardous to human life and property.
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.

## Examples
### Atmospheric

* Fog
** Haar (fog)
** Ice fog

### Electrical storms

* Thunderstorm
** Derecho
** Multicellular thunderstorm
** Pulse storm
** Squall line
** Storm cell (single-cell)
** Supercells, rotating thunderstorms
** Lightning

### Fire

* Wildfire or bushfire (ignition of wildfires is sometimes by lightning strike, especially in "dry thunderstorms")
** Firestorm
** Fire whirl, also called firenado and fire tornado

### Flood

* Floods
** Flash flood
** Coastal flooding
** Tidal flooding
** Storm surge

### Oceans and bodies of water

* Harmful algal bloom
** Blue green algae
** Red tide
* High seas
* Sneaker wave
* High tides
* King tide
* Ice shove
* Rogue wave
* Seiche
* Swell (ocean)
* Tidal surge
* Storm surge
* Rip currents
* Undertow (water waves)
* Whirlpools

#### Snow

* Avalanche
* Blizzard
* Lake effect snow
* Snownado
** Snow devil
** Polar vortex

#### Ice

* Black ice
* Glaze ice
* Hailstorm
* Ice shove
* Ice storm
* Megacryometeor

#### Rain

* Acid rain
* Blood rain
* Cold drop (Spanish: gota fría; archaic as a meteorological term), colloquially, any high impact rainfall event along the Mediterranean coast of Spain
* Drought, a prolonged water supply shortage, often caused by persistent lack of, or much reduced, rainfall
* Floods
** Flash flood
* Rainstorm
* Red rain in Kerala (for related phenomena, see Blood rain)
* Monsoon

### Surface movement

* Avalanche
* Mass wasting and landslips
* Earthquake
** Landslide
** Debris flows
** Mudslide
** Rockfall
** Coastal erosion
** Sinkhole

### Temperature

* Cold wave
* Heat wave
* Heat burst
* Polar vortex

### Volcano

* Volcanic eruption
* Volcanic lightning
* Volcanic ash

### Wind

* Cyclones
** Extratropical cyclone
*** European windstorms
*** Australian East Coast Low
** "Medicane", Mediterranean tropical-like cyclones
** Polar cyclone
** Tropical cyclone, also called a hurricane, typhoon, or just "cyclone"
** Subtropical cyclone
** Australian east coast low
* Explosive cyclogenesis or weather bomb
* Dust storm
** Haboob
** Dust devil
** Sandstorm
* Hurricane
* Katabatic winds
** Bohemian wind
** Bora
** Piteraq
** Gregale
** Anabatic wind
** Valley exit jet
** Santa Ana winds
** Williwaws
** Chinook
* Gale
* Monsoon
* Nor’easter
* Nor'westers
* Steam devil
* Squall
** Straight-line winds
** Derecho
* Tornado (also colloquially referred to as a "whirlwind" or "twister")
** Landspout
** Gustnado, a "gust front tornado"
** Waterspout
* Winter storms
* Wind gust
* Windstorm
* Gust front

### Other

* Heat lightning
* Zud, widespread livestock death, mainly by starvation, caused by climatic conditions
* Hayfever
* Asthma
Some related meteorological terms: weather front, gust front, bow echo, Atmospheric river

## Phenomena caused by severe thunderstorms

* Excessive Lightning
* Derecho
* Extreme wind (70 mph or greater)
* Downpours
* Heavy rain
* Flood, flash flood, coastal flooding
* Hail
* High winds – 93 km/h(58 mph) or higher.
* Lightning
* Thundersnow, Snowsquall
* Tornado
* Windstorm (gradient pressure induced)
* Severe thunderstorm (hailstorm, downburst: microbursts and macrobursts)

## Severe weather caused by humans

* Air pollution