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Currently at Robbinsdale Middle School
Section 1-The PHYSICAL MAP, BAROMETER and CLOUDS
The barometer measures the amount of air pushing on us. Barometric changes bring many changes to weather.

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.

Weather Underground IR Satellite Barometer History Weather Underground Current Surface Map

Section 2-WIND SPEED, WIND DIRECTION AND THE PHYSICAL MAP
Pressure systems change the air flow in an area.
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.

Current Wind Direction  Current Wind Speed Weather Underground Wind Speed Map Weather Underground Current Surface Map


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?


Weather Underground Wind Speed Map Weather Underground Current Surface Map
Wind Speed History  Barometer History

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?

Weather Underground Temperature Map   Weather Underground Current Dewpoint Map

^Current temperature map    ^Current Dew Point map

Current Outside Temperature Current Outside Dewpoint Current Wind Chill Current Heat Index

Section 6-Fronts
go to Weather Underground
Wunderground.com
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?

Temperature
36.3°F
Humidity
97%
Dewpoint
35.5°F
Wind
NE at 2.0 mph
Barometer
29.583 in & Falling Rapidly
Today's Rain
0.00 in
Rain Rate
0.00 in/hr
Storm Total
0.39 in
Monthly Rain
0.40 in
Yearly Rain
1.00 in
Wind Chill
34.2°F
THW Index
34.2°F
Heat Index
36.3°F
UV
0.0 index
Solar Radiation
23 W/m²
Today's Highs/Lows

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

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