Types of fronts and weather map symbols

2. *When convection and winds cause air
masses to move, they bump into one
another.
*The area where two air masses meet is
called a front.
*Most severe weather occurs near frontal
boundaries.
*

3. *

4. *

5. *Cold, dense air is moving toward warm, less dense air.
*The warm air is pushed up to cool and form clouds as the
cooler air replaces it.
*The air on the front side of the boundary line is warmer
than the air on the back side of the boundary line.
*These fronts are usually fast moving and bring stormy
weather and heavy precipitation followed by clearing
skies and higher pressure.
*

6. *

7. *

8. *Warm air is moving toward cold air.
*The warm, less dense air slides over the cold,
more dense air.
*The air on the front side of the boundary line is
cooler than the air on the back side of the
boundary line.
*These fronts usually move slowly and bring
steady rain or snow over many days.
*

9. *Warm and cool air masses that are not strong
enough to move one another
*Sits still for a long period of time
*

10. *

11. *These fronts occur when neither the
cool nor warm air masses are strong
enough to replace each other.
*They tend to stay in an area for a long
period of time, often bringing long
periods of precipitation and clouds.
*

12. * Two cooler air masses meet and force a warm
air mass aloft.
* Brings cool temperatures and large amounts of
rain or snow.
* Followed by clear skies and drier air.
*

13. *

14. *This is when a warm air mass is caught between
two cold air masses.
*The colder air mass moves under the warm air
mass and pushes it up.
*The colder air mass then moves forward until it
meets a cold air mass that is warmer and less
dense.
*The colder air mass moves under this air mass
and pushes it up.
*Brings clear skies and drier air.
*

15. *

16. *

17. http://www.classzone.com/books/earth_science
/terc/content/visualizations/es1903/es1903pag
e01.cfm?chapter_no=visualization
*

18. *The heating and cooling of water and land
produces land breezes and sea breezes.
*High pressure moves toward low pressure,
pushing the warm air upward.
*As warm air rises, cooler air moves in and
replaces it.
*

19. *The Sun heats the water and land every day.
*Land heats up rapidly, but cools off rapidly.
*Desert
*Water heats up slowly, but cools off slowly.
*Swimming at night
*The heat retained by the oceans is what keeps our
planet insulated.
*

20. *

21. *Weather is the atmospheric condition at a
certain time and place.
*Weather maps are used to show current
weather conditions in an effort to predict
future weather conditions.
*You need to know what each symbol
means and how to interpret them to
forecast the weather.
*

22. *Air pressure is measured with a barometer in
millibars.
*Millibars are represented by connected lines of equal
pressure. This is a lot like the topographic map lines.
*The closer together the lines are, the faster the wind
speed.
*The farther apart the lines are, the slower the wind
speed.
*

23. *

24. *Cooler, dense air close to the surface of
the Earth.
*Surrounded by winds flowing in a
clockwise direction.
*Usually brings dry conditions and fair
skies.
*

25. *

26. *Warmer, less dense air above the Earth’s
surface
*Surrounded by winds moving in a
counterclockwise direction.
*Associated with the formation of storms.
*

27. *

28. *

29. *