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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Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
A narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.
A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...
Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...