Chapter 6 lesson 4 How are weather forecasts made?

Chapter 6 Chapter 6 lesson 4lesson 4

How are weather How are weather forecasts made?forecasts made?

Barometer Barometer ►A barometer shows air A barometer shows air

pressure, it can rise or pressure, it can rise or fall. fall.

►A A risingrising barometer barometer means sunny and dry means sunny and dry conditions, while a conditions, while a fallingfalling barometer barometer means stormy and means stormy and wet conditions.wet conditions.

ANEMOMETERANEMOMETER

►An ANEMOMETER measures wind An ANEMOMETER measures wind speed. speed.

► The dial shows the wind speed. The dial shows the wind speed.

RAIN GAUGERAIN GAUGE

►A RAIN GAUGE measures the amount A RAIN GAUGE measures the amount of rain that has fallen over a specific of rain that has fallen over a specific time period.time period.

WEATHER BALLOONWEATHER BALLOON► AA WEATHER WEATHER

BALLOON measures BALLOON measures weather conditions weather conditions higher up in the higher up in the atmosphere.atmosphere.

►Weather balloons Weather balloons carry instruments carry instruments which measure air which measure air conditions such as conditions such as temperature at temperature at different altitudes. different altitudes.

Weather patternsWeather patterns

►Weather follows patterns.Weather follows patterns.►Temperature usually rises during the Temperature usually rises during the

day and falls at night.day and falls at night.►Temperature and precipitation also Temperature and precipitation also

change with the seasons. change with the seasons. ►Technology helps weather forecasters:Technology helps weather forecasters:

Doppler raderDoppler rader

►The The doppler raderdoppler rader: detects : detects precipitation and how wind affects its precipitation and how wind affects its movement. movement.

► It can track tornadoes!It can track tornadoes!

Weather forecastersWeather forecasters

►Weather Weather forecasters forecasters are people are people who who predicate and predicate and report on report on weather. weather. They use They use technology to technology to gather gather weather dataweather data..

What do the blue and red marks mean?

Now we are going to be weather Now we are going to be weather forecasters:forecasters:

-Receive assigned zip code-Receive assigned zip code

-Work together to forecast the weather -Work together to forecast the weather for the class on your assigned area.for the class on your assigned area.

-Explain what tools you used to predict -Explain what tools you used to predict that weatherthat weather

-Draw your weather maps.-Draw your weather maps.

Zip codesZip codes

►http://www.weather.com/weather/http://www.weather.com/weather/today/Temecula+CA+92592today/Temecula+CA+92592

►Temecula: 92592Temecula: 92592►Flagstaff, AZ :86001Flagstaff, AZ :86001►Addison, MI: 49220Addison, MI: 49220►Young America, MN: 55560Young America, MN: 55560►Longview, TX:75601Longview, TX:75601

Chapter 6 Review!Chapter 6 Review!

1) What shows air pressure, it can rise or fall.1) What shows air pressure, it can rise or fall.A barometerA barometer

2) Convection currents in the atmosphere 2) Convection currents in the atmosphere causes…..causes…..

WindWind

3) Air pressure _______ as you move up through 3) Air pressure _______ as you move up through the Earth’s atmosphere.the Earth’s atmosphere.

DecreasesDecreases

4) Cool air is _____than warm air.4) Cool air is _____than warm air.Heavier.Heavier.

5) What are the 4 types of Air masses?5) What are the 4 types of Air masses?

1) Maritime polar air mass 2) Maritime tropical Air mass1) Maritime polar air mass 2) Maritime tropical Air mass::3) Continental Polar Air mass 4) Continental tropical Air 3) Continental Polar Air mass 4) Continental tropical Air

massmass

6) ______________can cause tornados?6) ______________can cause tornados?ThunderstormsThunderstorms

7) How does the uneven heating of the earth causes 7) How does the uneven heating of the earth causes convection currents?convection currents?

Differences in air temperature happen at different Differences in air temperature happen at different locations and convection currents form because warm locations and convection currents form because warm air rises and cool air sinks.air rises and cool air sinks.

8) What does the symbol to the right mean?8) What does the symbol to the right mean?

9) What does the image in red mean?9) What does the image in red mean?

►Bonus questions 2pts:Bonus questions 2pts:

►What does this image mean?What does this image mean?