What is Blowing Snow?

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...