Show:
Air Masses
Fronts
Storms
Forecasting
Weather Maps
100
A huge body of air that has similar temperature, humidity, and air pressure at any given height
What is an air mass?
100
The boundary where air masses meet
What is a front?
100
Electrical discharge within, between, or from clouds
What is lightning?
100
If air is colder than 0 degrees celsius, all the way to the ground, precipitation falls as ___________________.
What is snow?
100
An open circle on a weather map symbol indicates ________ percent cloud cover.
What is 0%.
200
Cool, humid air masses form over the North Pacific and North Atlantic ocean, bringing cooler weather and often fog or rain to the West Coast.
What is Maritime Polar?
200
Type of front where a mass of warm air is trapped above two cooler air masses.
What is an occluded front?
200
Storm forming in large cumulonimbus clouds, producing heavy precipitation and frequent thunder and lightning.
What is a thunderstorm?
200
Scientists who study the weather and try to predict it.
What are meteorologists?
200
Lines joining places on the map that have the same air pressure.
What are isobars?
300
Winds that commonly move air masses over the United States.
What are Prevailing Westerlies and Jet Streams?
300
A fast-moving cold air mass overtakes a warm air mass.
What is a cold front?
300
Lines joining places on a weather map that have the same temperature.
What are isotherms?
400
Warm, humid air masses forming over the tropical oceans, usually bringing hot, humid weather.
What is Maritime Tropical?
400
A warm air mass overtakes a slow-moving cold air mass.
What is a warm front?
400
Storm beginning as a tropical disturbance; renamed when wind speeds reach 119 km/hrs; strikes the East Coast of the U.S. most commonly in August, September, and October
What is a hurricane?
400
Name of a NASA Weather Satellite
What is Terra?
400
Atmospheric pressure is measured in ______________
What are millibars?
500
Average elevation of the jet stream above the surface of the Earth.
What is 10 km?
500
A spiral of warm, high-pressure, dry air
What is an anticyclone?
500
Tornadoes produce winds in excess of __________ km/hr.
What is 500?
500
Why do meteorologists predict lake-effect snow in the winter, but not lake-effect rain in the summer in the area around the Great Lakes?
In the winter, the polar air masses move across the warmer water of the Great Lakes, becoming more humid as water vapor evaporates from the lakes. When the air reaches land and cools off again, lake-effect snow falls. In the summer, the land does not cool off significantly and the weather patterns change so that the same areas do not receive similar amounts of rainfall.
500
Two equal-length ticks on a wind direction line at the 8 o'clock position on a weather map symbol indicates that the wind is blowing between _______ and________ mph, from the _________________.
21-25 miles per hour; southwest.