Burrrrrr
You need what two conditions for ice to form?
Moisture & Freezing Temp
What weather hazard is associated with the following weather hazards: Strong wind gusts; Heavy rain; Sometimes hail; Occasionally tornadoes; Significant turbulence; Icing; Wind shear?
Thunderstorm
What is the term for the amount of vapor present in a given volume of air?
Humidity
What layer of the atmosphere holds the majority of Earth's weather?
The troposphere
Wind (Advection) is due to...
the uneven heating of the Earth's surface
What type of equipment gets rid of ice after it has formed?
Deicing Equipment
What weather hazard can be located under a thunderstorm and is associated with severe windshear?
A microburst
What is the term for the lowest cloud layer which has 5/8 or greater coverage?
Ceiling
21% of the atmosphere is comprised of what molecule?
Oxygen
Wind is a vector, meaning it contains what two components?
Speed and direction
What type ice would a pilot expect if the outside air temperature is -10 deg. C?
Mixed Icing
What is the name of the turbulence that is found in the jet stream frontal zone?
What are the three ingredients for cloud formation?
Water vapor, Condensation nuclei, Cooling
By mass, 50% of the Earth's atmosphere is below what approximate altitude?
18,000 feet
What three forces affect air motion along the surface of the Earth?
Pressure Gradient Force, Coriolis Force, Friction
What is the name of the phase change when water goes from gaseous state to solid ice? (Occurs during carburetor icing)
Deposition
What condition category is reported if the ceilings are less than 500 ft. AGL and/or the visibility is less than 1 sm?
Low IFR
What is the term used to describe air being cooled by an upward movement?
Adiabatic Expansion
What is the name of the toxic, highly reactive pollutant produced in the lower atmosphere by the action of the sun on oxides of nitrogen and by electrical discharges, such as lightning?
Ozone
What would be reported if there is a sudden increase of wind speed by at least 16 knots to a sustained speed of 22 knots or more for a one-minute period?
Squall
What icing intensity should a pilot report if the rate of ice accumulation is slightly greater than sublimation and ice is perceptible yet deicing/anti-icing equipment is not utilized.
Trace
What meteorological equipment helps meteorologist in detecting tornadoes and microbursts?
Doppler Radar
(VP / SVP) x 100 =
Relative Humidity
What is the dry adiabatic lapse rate?
3 deg C per 1,000 feet
What is the name of the meteorologist that developed a scale to rate tornadoes based of the damage observed?
Dr. Tetsuya Theodore Fujita