Severe weather phenomena are weather conditions that are hazardous to human life and property.
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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
Electrical storms
- Storm
 - 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
 
 
Flooding
Oceans and bodies of water
Precipitation
Snow
Ice
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
 - Rainstorm
 - Red rain in Kerala (for related phenomena, see Blood rain)
 - Monsoon
 
Surface movement
- Avalanche
 - Mass wasting and landslips
 
Thermal
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
 
 - Extratropical cyclone
 - Explosive cyclogenesis or weather bomb
 - Dust storm
 - Hurricane
 - Katabatic winds
 - Gale
 - Monsoon
 - Nor’easter
 - Nor'westers
 - Steam devil
 - Squall
 - 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
 
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
See also
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