Weather (59 questions) Flashcards
What types of fog depend upon wind in order to exist?
ADVECTION fog and UPSLOPE fog.
Clouds, fog, or dew will always form when
water vapor CONDENSES.
Moist, STABLE air flowing upslope can be expected to
produce STRATUS type clouds.
What feature is normally associated with the CUMULUS STAGE of a thunderstorm?
Continuous UPDRAFT.
Steady precipitation preceding a front is an indication of
STRATIFORM clouds with LITTLE or NO turbulence.
Thunderstorms reach their greatest intensity during the
MATURE stage.
What are characteristics of a moist, unstable air mass?
CUMULIFORM clouds and showery precipitation.
What situation is most conducive to the formation of RADIATION fog?
WARM, MOIST air over low, flatland areas on clear, calm nights.
When may hazardous wind shear be expected?
In areas of low-level temperature inversion, frontal zones, and clear air TURBULENCE.
Low-level turbulence can occur and icing can become hazardous in which type of fog?
STEAM fog.
What is the approximate base of the cumulus clouds if the surface air temperature at 1,000 feet MSL is 70F and the dew point is 48F?
6,000 feet MSL.
Lapse rate = 4.4F per 1,000 feet
70 / 4.4 = 5 (x 1,000) + field elevation
During the life cycle of a thunderstorm, which stage is characterized predominately by DOWNDRAFTS?
Dissipating.
Which weather phenomenon signals the beginning of the MATURE stage of a thunderstorm?
PRECIPITATION beginning to fall.
What is a characteristic of STABLE air?
STRATIFORM clouds.
What clouds have the greatest turbulence?
Cumulonimbus.
