Maritime air masses tend to have higher amounts of this than air masses that form over land.
What is moisture or water.
100
Winds tend to move from areas of high pressure to areas of this.
What is low pressure.
100
What would a thermometer read in degrees Fahrenheit (ºF) at water's melting point?
What is 32ºF.
100
This is the definition of dewpoint.
What is the temperature at which water will begin to precipitate out of the air.
100
This type of weather would be found at a weather station if its station model had a triangle to the left of the cloud cover circle.
What is hail.
200
These types of air masses tend to form over large land masses.
What are continental air masses.
200
Winds in the northern hemisphere tend to turn in this general direction around low pressure systems due to the Coriolis effect.
What is left or counterclockwise.
200
Barometers measure this property in either inches of Mecury (in of Hg) or milibars (mb).
What is AIR pressure.
200
Using a psychrometer, I determine the dry bulb temperature is 20ºC and the wet bulb temperature is 10ºC. What is the current
What is -2ºC.
200
This would be the number of feathers present on the station model if the wind was blowing at 25 knots.
What is two and a half.
300
Warm air masses will always rise when they come in contact with cold air masses because of this property.
What is density
300
This is the speed in miles per hour that a wind moving at 20 knots is moving.
What is 23.
300
These are the two instruments you would need in order to ascertain a wind's direction and speed.
What are an anemometer and a weather vane.
300
Using a hygrometer, a student notices the dry bulb temperature is 22ºC and the wet bulb temperature is 20ºC. This is the current relative humidity.
What is 83%.
300
The wind direction indicator is pointing directly down on a station model. A weather vane placed near this weather station would indicate that the wind was coming from this direction.
What is south.
400
This type of front forms when a warm air mass is trapped between two colder air masses.
What is an occluded front.
400
Cold ocean air causes a breeze to blow towards a warm beach due to this effect.
What is convection.
400
The wet bulb on a psychrometer tends to show a lower temperature than the dry bulb due to this process in the water cycle.
What is evaporation.
400
A student notices that the difference between the dry bulb and wet bulb temperatures on a psychrometer is 6ºC and that the dewpoint is 4ºC. This is the current dewpoint temperature.
What is 16ºC.
400
This is the current barometric pressure in milibars (mb) if the station model indicates a pressure of 229.
What is 1022.9 mb.
500
A stationary front forms under these circumstances.
What is when a cold air mass meets a warm air mass and neither one has enough energy to move the other.
500
This is how the Coriolis effect works.
What is the earth is moving under wind causing it to deflect either to the right in the northern hemisphere or the left in the southern hemisphere.
500
It's sunny, cool, and almost no clouds are visible outside. The barometer will probably tell you the current air pressure is this.
What is high.
500
You can expect this type of weather as the difference between the dry and wet bulb temperatures read on a psychrometer increases.
What is cool, sunny, cloudless weather.
500
A station model indicates a barometric trend of +22/ and a current pressure of 921. This was the barometric pressure (IN MILIBARS) 3 hours ago.