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Which parameters of an air mass are generally uniform when measured across any horizontal direction?
Temperature and moisture
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Which four frontal properties used to locate and classify fronts?
Pressure, temperature, dew point, and wind
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What are the five factors that influence frontal weather?
- Moisture available
- Stability
- Slope
- Speed
- Contrast in temp & moisture
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With frontal passage, the winds of a cold front will shift from the ______to the ______, and the winds of a warm front will shift from the ______ to the ______.
southwest to the northwest; southeast to the southwest
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In one respect, embedded warm-front thunderstorms present a greater flying hazard than cold-front thunderstorms because the warm-front cumulonimbus clouds ______.
may be hidden in stratus type clouds.
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What would indicate that a cold front has passed?
- *Wind shifts
- Ceiling & visibility (VMC w/isolated IMC)
- Turbulance
- Precipitation and icing
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If you are flying from east to west and you encounter cirrus, cirrostratus, alto-stratus, nimbostratus and then stratus clouds, you are most likely approaching a ______.
Stationary front or warm front
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Where does the greatest contrast between air masses exists?
at the surface
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What type of slope does a warm front have?
an extensive forward slope
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Stationary front weather is similar to what type of front?
Warm front, but usually less intense
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An occluded front is generally located ____ to ____ of the frontal intersection. This is also where the most ____ weather of an occluded front occurs.
100 nm south; 300 nm north; sever
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How are squall lines depicted on surface charts?
dashed, double-dotted, purple line
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How far ahead of a warm front can the associated cloud system reach?
500 to 700 miles
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What type of wind shift will you expect to find when encountering a stationary front?
180º wind shift
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What kind of weather can be expected when flying through an occluded front?
weather associated with both cold and warm fronts
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What type of frontal system usually has no clouds or precipitation?
an inactive front
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At what level above the surface do the differences between two air masses forming a front become negligible?
15,000 to 20,000 feet
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Every front is located in a _______.
trough of low pressure
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Lines of fast moving thunderstorms are known as _______.
squall lines
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Which frontal system has a more shallow slope, a cold front or a warm front?
warm front
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