nimbus		storm that forms over warm, tropical waters and can last for weeks
hail		high, thin, feathery clouds made of ice crystals
stratus		low, layered gray clouds that usually bring poor weather
warning		measures temperature
thermometer		measures precipitation
front		air moving from an area of high pressure to an area of low pressure
barometer		large, puffy white clouds that usually bring fair weather
wind		issued when severe weather has been spotted
relative humidity		measures relative humidity
cumulus		rotating funnel cloud with strong winds; can be formed from thunderstorms
hurricane		the amount of water vapor in the air compared to the amount that the air can hold
tornado		precipitation that is liquid
isobar		word added to a cloud type to mean it is dark and full of precipitation
snow		lines connecting areas of same temperature on a weather map
weather		shows the weather conditions in a specific location on a weather map
watch		measures wind speed
isotherm		storm that occurs when warm, moist air is pushed up and cooled quickly
air mass		precipitation that freezes directly from a gas, skipping the liquid phase
station model		measures air pressure
rain		issued when severe weather could happen
hygrometer		a large body of air that has the same properties of the Earth below it
rain gauge		lines connecting areas of same pressure on a weather map
anemometer		precipitation that is frozen in several layers
thunderstorm		precipitation that starts as liquid, then passes through a layer of freezing air
wind vane		the boundary between air masses
sleet		the condition of the air around you
cirrus		measures wind direction