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An air mass is defined by these two properties.
What are temperature and humidity?
A mid-latitude cyclone forms from this temperature contrast.
What is clashing warm and cold air masses?
Lightning must be present for this system to count as a true thunderstorm.
What is lightning defines a thunderstorm?
Lightning forms because charges inside a cloud become separated due to these collisions.
What are ice, hail, and water droplet collisions?
A Tornado Watch means conditions are possible; a Tornado Warning means this.
What is a tornado has been spotted or indicated by radar?
Continental air masses are dry; maritime ones are this.
What is moist?
Convergence causes rising air and low pressure; divergence causes this kind of system.
What is an anticyclone (high pressure)?
Hail forms because of this strong vertical movement inside the storm.
What are powerful updrafts?
Thunder follows lightning because of this difference.
What is light travels faster than sound?
Two essential hurricane conditions include warm ocean water and this rapid upward motion.
What are warm water and strong convection?
These are the four major front types.
What are cold, warm, stationary, and occluded fronts?
Cyclones strengthen when temperature differences do this.
What is increase?
Thunderstorms require these three ingredients.
What are moisture, instability, and lift?
Tall objects get struck by lightning most often because they shorten this.
What is the distance to the cloud (path of least resistance)?
Hurricanes cannot form at the equator because this force is zero there.
What is the Coriolis effect?
Frontal lifting leads to this cloud effect.
What is cloud formation and precipitation?
These are the life cycle stages of a cyclone.
What are formation, maturity, and dissipation?
Hailstones have clear and cloudy layers because these conditions change inside the updraft.
What are changes in temperature and moisture?
This part of a hurricane is calm; this part has the strongest winds; these outer areas make the storm huge.
What are the eye, the eyewall, and the rainbands?
The dew point predicts fog, frost, and precip because it tells you this.
What is the temperature at which air becomes saturated and water condenses?
A cold front overtaking a warm front creates this.
What is an occluded front?
The three life cycle stages of a thunderstorm are these.
What are cumulus, mature, dissipating?