Transcript Chapter 13 Notes

Maritime Polar is a air mass that brings cool, humid
weather to the West Coast.
When two cool air masses cut a warm air mass off from the
ground you have an occluded front.
In the Northern Hemisphere cyclone winds spin
counterclockwise.
 The sudden discharge of energy in a storm is referred
to as lightning.
 Tornadoes form in cumulonimbus clouds.
 The storms that produce the highest winds are
tornadoes.
 Hurricanes that strike the East Coast of the USA
usually happen in August, September, and October.
 The most dangerous weather-related events in the US
are floods.
 Lines on a weather map joining places with the same
air pressure are called isobars.
 El Nino occurs once every two to seven years.
 A cold front occurs when a rapidly moving cold air mass
runs into a slowly moving warm air mass.
 Thunderstorms and other abrupt weather changes
usually are caused by cold fronts.
 Anticyclones are high pressure centers of dry air.
 A tropical storm with winds of 119 Kilometers per hour
or higher is called a hurricane.
 Snow falls when humid air cools below 0 C.
 Continental air masses form over land.
 Cyclones are low pressure centers.
 A tornado warning means that a tornado has been
spotted in the sky.
 A hurricane is a tropical disturbance.
 Isotherms are used to show temperature.