1. Weather

2. Goals I can use my notes to explain weather maps.
I can list at least two things that go into predicting the weather.
I can give three reasons why meteorologists work to predict the weather.

4. Surface Air Pressure
The pressure of the atmosphere pressing on the Earth’s suface.

5. Surface Air Pressure Map

8. Surface Temperature
Surface temperature is the actual temperature of the air outside, measured in degrees Fahrenheit.
Water freezes at 32⁰ F
Water boils at 212⁰ F

9. Air Temperature

11. Dew Point Temperature
The dew point temperature is the temperature at which the air can no longer “hold” all of the water vapor which is mixed with it, and some of the water vapor must condense into liquid water.
Dew point is always lower than (or equal to) the air temperature.
If the dew point is equal to the air temperature, fog, dew, and clouds form.

12. Dew Point Temperature

14. Surface Pressure Change
The change in surface air pressure over a period of time.

15. Air Pressure Change

17. “Surface” Weather Maps
Meteorologists use a series of symbols to show a lot of information on a single map.

18. wind speed and direction
cloud type
temperature
atmospheric pressure
visibility in miles
pressure changes
dew point
wind speed and direction
past weather

19. Front Graphic: Front Definition:
Types of Fronts
Front Graphic:
Front Definition:
Cold Front: a zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer.
Warm Front: a transition zone between a mass of warm air and the cold air it is replacing.
Stationary Front: A front between warm and col air masses that is moving very slowly or not at all.
Occluded Front: A composite of two fronts, formed as a cold front overtakes a warm or quasi-stationary front.

20. Other Types of Fronts: