High pressure means more air pushing down on us.
Find an H on the map. This is the symbol for high pressure.
1. What are the characteristics of a High pressure?
2. Compare it to the cloud map-the first map. Describe the cloud cover around the H.
3. Look at the physical map-the second map. Describe the conditions around the H.
4. How closely does the description of the H correspond to what is on the map?
Low pressure means less air pushing on us.
Find an L on the map. This is the symbol for low pressure.
5. What are the characteristics of a Low pressure?
6. Compare it to the cloud map. Describe the cloud cover around the L.
7. Look at the physical map. Describe the conditions around the L.
8. How closely does the description of the L correspond to what is on the map?
Look at our barometer history. Compare it to the physical map.
9. Explain what is happening to our barometer and why it is changing.
Section 2-WIND SPEED, WIND DIRECTION AND THE PHYSICAL MAP
Air rotates clockwise around a High and counter clockwise around a low.
10. What is the wind speed and direction here?
11. What feature is making our wind blow from that direction?
12. Predict our wind speed and direction over the next few hours.
Section 3-WIND SPEED and BAROMETER
Changes in barometer change the speed of the wind.
Look at the wind speed and barometer over the last day.
13. What is the relationship between wind speed and barometer trend?
14. Look at a physical map. Can you find the weather feature that caused this change?
Section 4-Isobars
Isobars are lines of equal barometric pressure. Each white line is an isobar.
15. What is the relationship between the isobars and the wind speed on the map above?
Section 5-TEMPERATURE, DEWPOINT, HEAT INDEX, WIND CHILL
Changes in the dew point can make us feel warmer or colder.
Dew points above 50 make sweat collect on our skin and warm us.
Temperature + Dew Point=Heat index (summer)
Dew points below 45 can make sweat evaporate and make us feel cooler.
Temperature – dew point = Wind Chill (in winter)
16. What is the temperature and dew point now?
Describe how you feel when you are outside?
17. Because of the humidity-what is happening to your skin and why?
18. What relationship can you find between temperature and dew point?
Section 6-Fronts
go to Weather Underground
19. List the 4 types of weather fronts.
20. Find one of the fronts on the physical map. Write down which one you found.
Make a chart with the following conditions of two places-
temperature, wind direction, barometer, barometer trend and dew point.
Pick a city in front of the front.
List the conditions in the chart before the front comes through.
Pick a city behind the front.
List the conditions in the chart after the front has passes
21. Are these changes consistant with the passing of that type of front?
High Temperature
Low Temperature
36.4°F at 3:41a
35.6°F at 12:00a
High Humidity
Low Humidity
97% at 3:40a
96% at 12:00a
High Dewpoint
Low Dewpoint
36.0°F at 3:40a
35.0°F at 12:00a
High Barometer
Low Barometer
29.656 in at 12:54a
29.581 in at 7:46a
High Rain Rate
0.00 in/hr at ----
High Wind Speed
12.0mph at 12:08a
Low Wind Chill
31.0°F at 12:17a
High Heat Index
36.0°F at 12:00a
High UV
0.0 index at ----
High Solar Radiation
32 W/m² at 7:41a