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Which parameters of an air mass are generally uniform when measured across any horizontal direction?
Temperature and moisture
Which four frontal properties used to locate and classify fronts?
Pressure, temperature, dew point, and wind
What are the five factors that influence frontal weather?
- Moisture available
- Contrast in temp & moisture
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
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.
What would indicate that a cold front has passed?
- *Wind shifts
- Ceiling & visibility (VMC w/isolated IMC)
- Precipitation and icing
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
Where does the greatest contrast between air masses exists?
at the surface
What type of slope does a warm front have?
an extensive forward slope
Stationary front weather is similar to what type of front?
Warm front, but usually less intense
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
How are squall lines depicted on surface charts?
dashed, double-dotted, purple line
How far ahead of a warm front can the associated cloud system reach?
500 to 700 miles
What type of wind shift will you expect to find when encountering a stationary front?
180º wind shift
What kind of weather can be expected when flying through an occluded front?
weather associated with both cold and warm fronts
What type of frontal system usually has no clouds or precipitation?
an inactive front
At what level above the surface do the differences between two air masses forming a front become negligible?
15,000 to 20,000 feet
Every front is located in a _______.
trough of low pressure
Lines of fast moving thunderstorms are known as _______.
Which frontal system has a more shallow slope, a cold front or a warm front?