Frontal Weather Flashcards
The primary cause of frontal weather is
the lifting of warm air by colder air
The frontal inversion of any front always slopes over the (warm/cold) air and the precipitation associated with it normally occurs in the (warm/cold) air.
cold
cold
The type of air masses most often associated with fronts in the USA are the
Polar and Tropical
All front have inversions.
True
What four discontinuities must be present for the meteorologist to draw a frontal symbol on the weather chart?
temperature
dewpoint
pressure
wind shift
Define cold front
the leading edge of the cold air mass normally moving SE
The coldest air will always be (ahead/behind) a cold front
behind
The average speed of a cold front is about ___ knots and the average slope is (steep/shallow)
25-35 knots
steep
Cold fronts are usually associated with (cumuliform/ stratiform) clouds which tend to produce a (narrow band/ wide-spread area) of clouds and precipitation.
cumuliform
narrow band
The general direction of movement of a cold front is TO the
SE
The surface wind behind the cold front is generally ___(FROM) and the surface wind ahead of the cold front is typically ___ (direction)
FROM NW
direction SW
A severe line of thunderstorms, _______, may form ahead of (slow/fast) moving cold fronts
squall line
fast
What flight procedure in the vicinity of a cold front?
Do not go. Wait it out.
Define Warm Front
trail edge of cold air mass moving NE overridden by warmer air.
The average slope of the warm front has a ratio of _____ and always slopes over the (cold/warm) air mass.
1:200
cold
Warm fronts normally move TO the
NE
The surface wind behind a warm front generally blows FROM____ and the surface wind ahead of the warm front usually FROM the____
SW
SE
What type of weather is usually associated with a stable warm front?
A large area of ST, NS, AS clouds with rain and possible fog
Where would the weather associated with a stable warm front occur?
ahead of the warm front
What other hazards should a pilot be aware of if the warm air being lifted by a warm front is unstable?
Thunderstorms embedded
What are the two important elements of preflight planning in vicinity of warm front?
Ensure fuel for long flight
possible diversion to ALT
The weather associated with a stationary front will normally be similar to that of a (cold/warm) front, but usually less intense
warm
What is the average speed of a stationary front?
less than 5 kts
Winds associated with a stationary front usually flow (parallel/perpendicular) to the frontal symbol.
parallel
Stationary fronts may develop into ______ ______ (type of front).
frontal waves
What type of front develops when the faster moving cold front of an open wave catches up with the slower moving warm front of the wave?
occluded front
Which front is considered to have the most violent weather? Why?
occulsions because combines both warm and cold front weather
IF an occluded front symbo on a weather map is an extension of the cold front symbol, it is a _____ type occulsion. If an occluded front symbol is an extension of a warm front symbol, it is a ____ type occulsion.
cold
warm
What is the procedure for flying in the vicinity of an occluded front?
Circumnavigate or avoid
