Conditions for weather
The hotness or coldness of the air.
air temperature.
A tool used to measure weather.
Weather instrument
A large body of air with roughly the same temperature and moisture conditions throughout.
Air Mass
Air masses that are dry and cold. Usual forms over northern Canada and Alaska.
Continental Polar
The amount of water in the atmosphere.
precipitation
Measures air temperature.
Thermometers
An air mass that forms at high latitudes between 60 degrees and the poles, is cool.
Polar (P) air mass
Air masses that are cold and moist and are usually below 70 degrees Fahrenheit.
Maritime Polar
Amount of water vapor in the air.
Humidity
Measures humidity
Hygrometer
An air mass that forms at low latitudes between the equator and 30 Degrees and is warm.
Tropical (T) air mass
Air masses that are hot and very dry, forms over the Desert Southwest and northern Mexico during summer.
Continental Tropical
How quickly the air moves past a certain point.
Wind speed.
Measures atmospheric pressure
Barometers
An air mass that forms over large land masses and is dry.
Continental (C) air mass
Air masses that are moist and warm, forms over the subtropical Pacific Ocean
Maritime Tropical.
How much cloud cover the sky.
Cloud cover
Measure wind speed
Anemometers
An air mass that forms over oceans and is moist.
Maritime (M) air mass
extremely cold air masses originate in the arctic.
Continental arctic masses.