Predicting the Weather
Meteorologists:
___________________
___________________
Air Pressure
(p. 510 – 514, 565 – 566)
Date ________
Class
Period _______
Fact: Warm air is lighter and is related to low pressure.
Cool air is heavier than warm air and pushes down with more pressure (high pressure).
What is air pressure?
_________________________________________________________________
1. What type of weather is associated with a high pressure system?
_______________________________
2. What type of weather is associated with a low pressure system?
_______________________________
3. If air pressure begins to drop, what type of weather is expected?
_______________________________
Humidity
(p. 546)
1. What is humidity?
_________________________________________________________________
2. What is the difference between humidity and relative humidity?
________________________________
__________________________________________________________________________
______
3. Can warm air or cold air hold the most water vapor? Explain
why.____________________________
__________________________________________________________________________
______
4. Imagine a cubic meter of air can hold 20 grams of water vapor.
There are
10 grams of water vapor in the air, what is the humidity level?
%
What if there were 5 grams of water vapor?
_______
_____%
5. What is dew point?
_________________________________________________________________
6.
If the temperature is 95º outside and the dew point is 45º, will it rain
outside?
Explain.
______________
__________________________________________________________________________
______
Wind Movement
1.
(p. 537)
Wind is the horizontal movement of air from an area of ____ pressure
to an area of ____ pressure.
2. Winds are described by their ________ and _______.
3. Does cool or heated air have a higher level of air pressure?
________________________
4. What are jet streams?
________________________________________________________
5. When the jet stream forms troughs of low pressure air that dip
south, what type of weather is
coming?____________________________________________________________
_______
6. When the jet stream forms ridges of high pressure air that rise
north, what type of weather does it bring?
___________________________________________________________________
Fronts and Air Masses
(p. 563 – 566)
1. What causes fronts to form over an area?
_________________________________________________
2. If a cold front moves into an area, what type of weather is expected?
_____________________________
3. What type of weather is associated with a warm front?
_______________________________________
4. What is a stationary front?
___________________________________________________________
5. What type of weather is associated with a stationary front?
___________________________________
6. What is an occluded front?
___________________________________________________________
7. What type of weather is associated with an occluded front?
____________________________________
Storms, Tornadoes, and Hurricanes (p. 569 – 573)
1. What causes storms to occur?
_________________________________________________________
2. How do tornadoes in the Great Plains form?
______________________________________________
____________________________________________________________________________
___
3. Where is “tornado alley? “
____________________________________________________________
Putting it all together – Dayton, Ohio
(weather activity sheets)
Air Pressure:
1. What was the air pressure in Dayton, Ohio for:
Day 2 _____
Day 3 _____
Day 1 ______
2. Is the air pressure moving toward Dayton higher or lower than Dayton’s?
______________________
3. What do you expect Dayton’s weather will be in 24 hours? Support your
answer. _________________
__________________________________________________________________________
____
Humidity:
1. What was the humidity level in Dayton for:
2 ______
Day 3 _______
Day 1 ______
Day
2. Do you notice any weather patterns or trends in Dayton that would affect
the weather within the next 24 hours? (Check the conditions for severe weather – weather sheet).
_____________________________________
_____________________________________________________________________________
___
Winds:
1. Is the jet stream affecting the weather in Dayton, OH on Day 1?
Explain. _________________
2. Is a trough or ridge moving toward Dayton?
_____________________________
3. Do you think it will be safe to have the air show in Dayton on the
fourth day? Support your answer.
___________________________________________________________________
Temperature/Air Masses/Fronts:
1. What type of air mass is moved into Dayton? (warm, cold)
____________________________
2.
How might it affect Dayton’s weather on Day 4?
_______________________________
Dayton, Ohio weather
Measurement
Day 1
Day 2
Day 3
Day
4
(Prediction)
Weather Forecast
for Day 4
Day
4
Actual
Air
pressure
Humidity
Wind
Movement
Front/Air
Mass
Were you correct?
Would
you make a
good weather person?