In which situation would a meteorologist typically forecast the lowest nighttime
ID: 157616 • Letter: I
Question
In which situation would a meteorologist typically forecast the lowest nighttime minimum temperature?
a. cloudy skies and calm winds
b. cloudy skies and strong winds
c. clear skies and calm winds
d. clear skies and strong winds
The lowest 1 km of the troposphere is most likely to become less stable to vertical displacements of air parcels ________.
a. on a clear, calm morning before the sun comes up
b. during a snowstorm
c. on a hot summer day
d. during an ice storm
e. when it is conditionally unstable
The dry adiabatic lapse rate is the rate at which the temperature of ________ changes with height.
a. a heated parcel of air
b. the atmosphere
c. a cooled parcel of air
d. an isolated parcel (no external heating or cooling)
e. the average atmosphere
If cold outside air of temperature 10°F is brought indoors and warmed with no change in its water vapor content, the relative humidity of this air will ________ and the dew point will ________.
a. increase, decrease
b. decrease, remain the same
c. increase, remain the same
d. decrease, increase
e. decrease, decrease
The lifting condensation level ____________.
a. is the level at which rain falling from a cloud evaporates.
b. represents the highest level to which air can be forced to rise by a mountain.
c. is a function only of the temperature of rising air.
d. is the altitude at which the temperature in a rising parcel of air falls to the dew point.
As an air parcel rises, it cools. As a result, the relative humidity of any rising air parcel should _______ during its ascent.
a. increase
b. decrease
c. remain the same
Air parcels can be lifted by all of the following except ________.
a. convection
b. fronts
c. orographic influence
d. divergence near the surface
e. low-pressure systems
Which of the following locations would have the smallest variation in average annual temperatures?
a. Minneapolis, Minnesota
b. Santa Catalina Island, California
c. Portland, Maine
d. Denver, Colorado
e. Flagstaff, Arizona
In which situation would a meteorologist typically forecast the lowest nighttime minimum temperature?
a. cloudy skies and calm winds
b. cloudy skies and strong winds
c. clear skies and calm winds
d. clear skies and strong winds
Explanation / Answer
1. d. clear skies and strong winds (clouds act as a blanket and keep the night warm, winds don't let the warmth accumulate)
2. c. on a hot summer day (because the low density, hot air near the surface will tend to float up and replace the cooler air overhead)
3. d. an isolated parcel (no external heating or cooling) ----- (The atmospheric lapse rate is the change in temperature with height, adiabatic means that no outside heat is involved in the warming or cooling of the air parcels. dry adiabatic lapse rate for a parcel is 10 C/km.)
4. b. decrease, remain the same (increase in temprature means lowering the RH. And as the air temperature increases, with no addition of water vapor to the air, the dew point will remain the same)
5. d. is the altitude at which the temperature in a rising parcel of air falls to the dew point. (it is the height at which the relative humidity (RH) of an air parcel will reach 100%)
6. a. increase (A rising parcel of air cools, and the relative humidity increases inside a rising unsaturated parcel.)