PP1 Ch6 Weather

Moist, stable air flowing upslope can be expected to

• cause showers and thunderstorms.

• produce stratus type clouds.

• develop convective turbulence.

The presence of ice pellets at the surface is evidence that there

• are thunderstorms in the area.

• has been cold frontal passage.

• is a temperature inversion with freezing rain at a higher altitude.

The amount of water vapor which air can hold depends on the

• stability of the air.

• dewpoint.

• air temperature.

What is the approximate base of the cumulus clouds if the surface air temperature at 1,000 feet MSL is 70°F and the dewpoint is 48°F?

• 4,000 feet MSL.

• 6,000 feet MSL.

• 5,000 feet MSL.

The suffix 'nimbus,' used in naming clouds, means

• a middle cloud containing ice pellets.

• a cloud with extensive vertical development.

• a rain cloud.

If an unstable air mass is forced upward, what type clouds can be expected?

• Stratus clouds with considerable associated turbulence.

• Stratus clouds with little vertical development.

• Clouds with considerable vertical development and associated turbulence.

What are the processes by which moisture is added to unsaturated air?

• Heating and condensation.

• Evaporation and sublimation.

• Supersaturation and evaporation.

What situation is most conducive to the formation of radiation fog?

• Warm, moist air over low, flatland areas on clear, calm nights.

• Moist, tropical air moving over cold, offshore water.

• The movement of cold air over much warmer water.

What are characteristics of a moist, unstable air mass?

• Poor visibility and smooth air.

• Cumuliform clouds and showery precipitation.

• Stratiform clouds and showery precipitation.

A stable air mass is most likely to have which characteristic?

• turbulence

• smooth air

• showery precipitation