These 3 conditions are the recipe for a thunderstorm.
What is moist air, a lifting mechanism, and unstable atmosphere.
100
Severe icing not associated with a thunderstorm would cause an issuance of this.
What is a Sigmet?
100
This is the average rate of pressure change per 1,000 ft altitude.
What is 1" Hg?
100
We can expect these types of clouds during a stable atmospheric day.
What are stratiform clouds?
200
This is the second phase of a thundastorm
What is the Mature phase.
200
Between 0 degrees C and -15 degrees C is where you can often find these types of droplets
What is supercooled water droplets?
200
Air flowing around a high pressure system flows this way.
What is clockwise, anti-cyclonic?
200
When a funnel cloud touches down in water it is called this.
What is a water spout?
300
This is a non-frontal narrow band of active thundastorms.
What is a squall line?
300
Precipitation that freezes as it falls is often called this.
What is Ice pellets?
300
These are the types of fronts.
What is warm, cold, occluded, and stationary?
300
Clouds must be at least this thick to produce heavy precipitation.
What is 4,000 feet thick?
400
This thundastorm is not associated with a front or pressure system
What is an air mass thunderstorm?
400
Structural, Induction and instrument are all these:
What are types of inflight icing?
400
Winds near a frontal boundary of a stationary front tend to flow this way.
What is parallel to the frontal boundary in opposite directions?
400
These clouds are often in connection with a violent tornado.
What are mammatus clouds?
500
These 6 conditions will cause a Convective Sigmet to be issued
What is Embedded T-storm, a line of T-storms, thunderstorms covering 40% of a 3000 square mile area, Surface winds 50 kts or greater, hail 3/4 inches or greater, and tornadoes.
500
Rime, Clear and mixed
What are types of structural icing?
500
Define wind shear
a change in wind speed and/or direction over a short distance
500
These are the four different types of cloud families.
What are low, middle, high and clouds with vertical development?