air mass - K12 Open Ed

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Transcript air mass - K12 Open Ed

air mass
• a body of air that covers a large area
and has a consistent temperature and
water cotent; air masses are generally
separated by fronts
cyclone
• a storm with strong winds moving in a
circle around a center of low pressure; a
closed system of spiraling winds going
counter-clockwise in the northern
hemisphere and clockwise in the
southern hemisphere
front
• a boundary between two air masses of
different density and usually of different
temperature; an area in the atmosphere
where cold and warm air systems meet
hurricane
• a large tropical storm with strong winds
moving in a circle around a center of
low pressure; a large destructive storm
with winds that exceed 75 miles an hour
circulating around an area of low
pressure
isobar
• a line connecting points of equal
atmospheric pressure on a weather
map
nor’easter
• a strong low pressure system that
affects the Mid-Atlantic and New
England States, bringing high winds,
heavy rains or snow, and high waves
thunderstorm
• a strong rain shower with thunder and
lightning
tornado
• a funnel cloud that touches the ground;
a storm with a funnel shaped-cloud that
forms from very high winds that come
with thunderstorms