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Water falling from a cloud and reaching the ground. Can become acidic (pH 5.65 and know as Carbolic Acid) due to CO₂ in the atmosphere dissolving into it.
Rain that appears to hang under a cloud and evaporates before reaching the ground.
Shower (rain)
A brief period of precipitation.
Ice crystals that leave the cloud and don't melt before hitting the earth.
Snow Squall
A suddenly heavy snow fall, with blowing snow and strong winds.
Ice Crystal (Bergeron) Process
As crystals grow and fall, they pass through the base of the cloud, which may be above freezing. Thus causing them to melt and fall as rain.
Snow Grains
They are very small (<1 mm), white, and opaque. They are grains of ice that are fairly flat. They don't bounce or break upon impact.
Snow Pellets
Precipitation of brief time, which consists of crisp, white, opaque ice particles, round in shape and about two to five millimeters in diameter.
A pellet of hail.
Sleet (Ice Pellets)
Consists of ice pellets, often mixed with rain and snow.
Compass rose
A pointer showing the four cardinal direction and sometimes intermediate directions as well
Standard Rain Gauge
Measure precipitation in a certain amount of time.
Tipping Bucket Rain Gauge
The precipitation collected by the receiver empties into one side of a chamber which is partitioned transversely at its center and is balanced bistably upon a horizontal axis. When a predetermined amount of water…
Weighing-Type Rain Gauge
It consists of a storage bin, which is weighed to record the mass. This gauge is better than tipping buckets because they don't underestimate intense rain, and it can measure other forms of precipitation, including rain, hail and snow.
Water Equivalent
The amount of water that would absorb the same amount of heat as a calorimeter.
measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects
This is a mixture of gases that surrounds Earth. In addition to containing the oxygen you need to breathe, it protects you from the sun's damaging rays and is always changing.
Solute Effect
the dissolving of hygroscopic particles, such as salt, in pure water, thus reducing the relative humidity required for the onset of condensation
Terminal Velocity
The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
the process by which molecules of water vapor in the air become liquid water
The amount of water vapor in the air
The maximum quantity of water vapor that the air can hold at any given temperature.
Relative Humidity
The link between the air's temperature and the amount of water vapor it contains
Stratus Cloud
Clouds that form in flat layers.
stratus clouds
These clouds are dark and block out the sun; usually produce light, steady precipitation
forms from water droplets or ice crystals
Rain guage
an instrument that measures precipitation
rain and drizzle
form from liquid cloud droplets or from ice crystals that melt as they fall
A mixture of rain and melting snow (UK) or ice pellets (North America).
Hail, hailstones
Frozen water droplets that grow larger while being held inside a cloud by strong up-drafts.