What is Warning?
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening now, developing as we speak, and is minutes away. This weather hazard poses a threat to life and property.
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Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...
Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...