Create an account
a scientist who studies the atmosphere using various instruments, computers, and models to make weather maps and forecasts
the state at a given place and time regarding heat, cloudiness, relative humidity, sunshine, wind, precipitation, etc.
rain or drizzle that freezes on contact with the Earth's surface. Results when rain or drizzle falls from a mild layer aloft into a shallow layer of below freezing water.
partially melted snowflakes that refreeze prior to striking the Earth's surface. Results when partially melted snowflakes fall from a mild layer aloft into a deep layer of below freezing air.
a type of precipitation that consists of an assemblage of ice crystals. Results when temperatures remain below freezing from the cloud all the way to the ground.
precipitation that consists of water droplets from 1-6mm in diameter. May result when temps. are above freezing from the cloud to the ground or when snow falling from a cloud melts as it encounters warm air.
precipitation that consists of water droplets from 0.2-0.5mm in diameter. May result when temps. are above freezing from the cloud to the ground or when snow falling from a cloud melts as it encounters warm air.
low pressure weather (storm) systems that occur in the middle latitudes of the Earth (outside the tropics) that are connected with the fronts and horizontal gradients in temperature and dew point producing anything from cloudiness and mild showers to heavy gales and thunderstorms. Air is rising and winds are counterclockwise around this type of system.
a large-scale circulation of winds around a central region of high atmospheric pressure clockwise in the Northern Hemisphere. Air sinks within this type of system.
in weather forecasting, a cluster of meteorological data plotted on a map indicating the weather information at a particular reporting station.
a special type of weather map that provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations. These maps are created by plotting or tracing the values of relevant quantities such as sea level pressure, temperature, and cloud cover onto a geographical map to help find features such as weather fronts.
a representation of a system often times on a smaller scale that can be used to help simplify and/or make predictions.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together