theh stands for a high pressure system this usually means clear weather. thel stands for a low...
TRANSCRIPT
You need this page & weather maps!
What Does It All Mean?
The
H stands for a
High Pressure System
This usually means CLEAR
WEATHER.The
L stands for a Low Pressure
SystemThis usually
means STORMY weather.
Large areas of air that have the same weather, temperature, and humidity.
Weather changes occur as air masses move and interact.
What are Air Masses????
A front is the boundary between two air masses.
Fronts bring changes in the weather. Because of the wind patterns, they generally move from west to east in the US.
Fronts are named for the air that is behind them.
What are Fronts???
Cold dense air pushes warm air out of the way.
Cold fronts move very quickly and bring short periods of rain/thunderstorms.
Lower temperatures are behind the front.
SYMBOL – the direction of the “arrows” points towards the direction the front is MOVING.
Cold Front
On Weather MapHow can you tell which direction the front is
moving from the map?
Cold Fron
t
Front
Awesome Cold Front Time Lapse! http://www.youtube.com/watch?v=0NoPXm7d5Tc
Warm air moves up the cold front as it slowly displaces the cold air.
Warm fronts move slowly and can bring many days of steady precipitation.
Higher temperatures are behind the front.
SYMBOL – direction of semicircles is the direction the front is moving.
Warm Front
Warm
Front
On Weather MapHow can you tell which direction the front is
moving from the map?
Fron
t
The air from the warm front and cold front meet, but do not move.
These fronts have weather similar to warm fronts.
SYMBOL – warm and cold air masses are moving in opposite directions, thus making a stationary condition
Stationary Front
Stationary FrontWhere the warm and
cool air meet, water vapor in the warm air condenses into rain,
snow, fog, or clouds.
Let’s see it on the map!
Stationary Front
Cold Front
Warm Front
http://www.wunderground.com/maps/#?type=Fronts Click for Current Weather Map!
Weather Maps Will Usually Have Legends…
READ THEM!
You Might Also See Maps Using Radar…
What’s Our Current Local Weather Map?
http://www.wunderground.com/maps/#?type=Fronts
Archived National Weather Maps for Comparison: http://www.hpc.ncep.noaa.gov/noaa/noaa_archive.php?lang=english Predict the Weather! www.edheads.org
Credits: http://www.weatherwizkids.com/weather-wind.htm
http://commons.wikimedia.org/wiki/File:Anemometer_Barani_anim_120x120.gif
http://www.carlroth.com