Tropical – Warm, form in the tropics, have low air pressure Polar – Cold, form north of 50 degrees north latitude and couth of 50 degrees south latitude (the poles!), high air pressure Maritime – Form over oceans, very humid Continental – Form over land, dry
A front is an area where air masses meet and do not mix. – Warm – Cold – Stationary – Occluded
What are the four types of fronts? Cold – Dense – cold air mass moves into a warm air mass -> the warm air is pushed upward – Clouds form and rain or snow may occur – Abrupt (quick) weather, including thunder storms – AFTER: cool, dry air -> clear skies and cooler temperatures
What are the four types of fronts? Warm – Warm air moves over cold air – May cause showers and light rain or scattered clouds, snow in the winter – Warm fronts move more slowly than cold air fronts -> may be rainy or foggy for several days – AFTER: warm and humid
Why does a cold front move faster than a warm front? A cold front moves faster than a warm front because it is easer for a cold (dense) air mass to move the warm (less dense) air mass up and out of the way than it is for a warm air mass to move a cold air mass.
What are the four types of fronts? Occluded – Warm air mass is caught between two cooler air masses – Weather may turn cloudy and rainy or snowy
What are the four types of fronts? Stationary – Warm and cold air masses me and do not move one another – A standoff – Causes rain, snow, fog, or clouds – May bring many days of clouds and precipitation
Tornados, Hurricanes, & Thunderstorms Review p. 108 question # 17 Thunderstorms form within large cumulonimbus clouds, or thunderheads. Lightning is a sudden spark, or energy discharge, as charges jump between parts of a cloud or between the cloud and the ground A tornado is a rapidly whirling, funnel-shaped could that reaches down from a storm cloud to touch Earths surface. A hurricane is a tropical storm with very strong winds.