WarmUp 5 minutes 1 Write down EVERYTHING you

Warm-Up (5 minutes) 1. Write down EVERYTHING you know about weather. 2. Write down EVERYTHING you would like to know about weather.

Air Mass Immense body of air that is characterized by similar temperatures and amounts of moisture at any given altitude. These cause weather.

Air Mass Classified on temperature AND humidity. Temperature: POLAR = cold TROPICAL = warm Humidity: Maritime = ocean Continental = land

How do you write AIR MASSES? Always put humidity first! (lowercase) then temperature (UPPERCASE) Ex. Maritime Polar = m. P Continental Polar = c_____ Maritime Tropical = _____ T Continental Tropical = ____

How do you write AIR MASSES? Always put humidity first! (lowercase) then temperature (UPPERCASE) Ex. Maritime Polar = m. P Continental Polar = c. P Maritime Tropical = m. T Continental Tropical = c. T

Classify each of the circles with what type of air mass you would find in each one. B. D. C. E. F.

Classify each of the circles with what type of air mass you would find in each one.

What happens when air masses move? What happens when you put ice in hot water? To the ice To the water What happens when air masses move? To the air mass To the new environment

As it moves, the characteristics of the air mass change and so does the weather in the area What type of air mass is cold and dry? Continental Polar

Weather Fronts The boundary between 2 air masses with DIFFERENT characteristics The DENSITY of each air mass determines its behavior Will more dense objects rise or fall?

Weather Fronts The boundary between 2 air masses with DIFFERENT characteristics The DENSITY of each air mass determines its behavior Will more dense objects rise or fall? FALL

Weather Fronts The boundary between 2 air masses with DIFFERENT characteristics The DENSITY of each air mass determines its behavior What 2 things determine density of air?

Weather Fronts The boundary between 2 air masses with DIFFERENT characteristics The DENSITY of each air mass determines its behavior What 2 things determine density of air? TEMPERATURE & HUMIDITY (water vapor)

What do you notice about the two halves of the sky?

Cold Fronts Quickly moving cold air mass runs into a slowly moving warm air mass -Cold denser than warm so cold sinks under warm and pushes warm upwards -Warm air cools, causing clouds to form CAUSE: abrupt changes in weather Severe thunderstorms, strong winds followed by cool, fair weather

Cold Front

Warm Fronts Slowly moving warm air mass collides with a cold air mass and rises over CAUSES: clouds, and light rain *because warm fronts move slower than cold fronts, may have rainy or foggy weather for several days

Warm Front

Stationary Front Cold & warm air masses meet, neither strong enough to overtake the other -They stay in place for an extended period of time CAUSES: many days of rain, snow, fog, or clouds

Stationary Front

Occluded Front Warm air mass is caught between 2 cooler air masses -Dense, cool air moves under the warm air and pushes it upwards (warm air is “occluded” or “cut off”) -Cooler air masses mix in the middle CAUSES: cool ground temp, strong winds, and heavy precipitation

Occluded Front

What type of front is over Charlotte?

What type of front is over Wyoming?

Quick Check… Answer in your notes! 1. Which 2 types of fronts result in several days of clouds or rain? 2. Compare and contrast occluded & stationary fronts. Provide at least 1 similarity and 1 difference AS WELL AS the symbols for each.

Weather Tracking Unit-long Activity

Weather Station Data On the blank piece of computer paper… Just like this one, you will label where each part is found YOU WILL TAKE NOTES ON THIS BLANK PAPER FOR TODAY

Weather Station Data TEMPERATURE Temperature measured in degrees F

Weather Station Data PRECIPITATION READ: Precipitation Types section Copy symbols into notes

Weather Station Data DEW POINT = Temperature needed for water vapor to condense DEW POINT

Weather Station Data CLOUD COVER = Percentage of sky covered in clouds *Similar to a pie chart READ CLOUD COVER SYMBOLS Copy symbols into notes CLOUD COVER

Weather Station Data READ: AIR PRESSURE Copy examples into your notes PRESSURE

Air Pressure continued If >500: Place a 9 in front and add a decimal point one place in If <500: Place a 10 in front and add a decimal point one place in

Air Pressure Example 1: Air pressure given: 010 < or >500? add 9 or 10? Move decimal one place in

Air Pressure Example 1: Air pressure given: 010 Step 1. < or >500? <500 Step 2. Add 9 or 10? add 10 to the front: 10010 Step 3. Move decimal one place in 1001. 0 mb

Air Pressure Example 2: Air pressure given: 710 < or >500? add 9 or 10? Move decimal one place in

Air Pressure Example 1: Air pressure given: 710 Step 1. < or >500? >500 Step 2. Add 9 or 10? add 9 to the front: 9710 Step 3. Move decimal one place in 971. 0 mb

Weather Station Data READ PAST PRESSURE Write down examples in notes PRESSURE CHANGE

Pressure Change: If there is a + in front… Pressure has increased in the past 3 hours Step 1. Place a decimal between the 2 digits Step 2. SUBTRACT the # from the current air pressure **THIS GIVES YOU THE PRESSURE 3 hrs AGO

Pressure Change Example 1: If there is a + in front… Pressure has increased in the past 3 hours Ex: +12 Step 1. Place a decimal between the 2 digits 1. 2 Step 2. SUBTRACT the # from the current air pressure ORIGINAL PRESSURE - 1. 2 = _______ **THIS GIVES YOU THE PRESSURE 3 hrs AGO

Pressure Change: If there is a - in front… Pressure has decreased in the past 3 hours Step 1. Place a decimal between the 2 digits Step 2. ADD the # from the current air pressure **THIS GIVES YOU THE PRESSURE 3 hrs AGO

Pressure Change Example 1: If there is a - in front… Pressure has decreased in the past 3 hours Ex: -12 Step 1. Place a decimal between the 2 digits 1. 2 Step 2. SUBTRACT the # from the current air pressure ORIGINAL PRESSURE + 1. 2 = _______ **THIS GIVES YOU THE PRESSURE 3 hrs AGO

Weather Station Data READ: WIND IN notes: write down what the flags mean WIND SPEED

Wind Speed What is the wind speed at this station?

Wind Speed What is the wind speed at this station? 20 knots (2 full feathers = 10+10)

Weather Station Data WIND DIRECTION

Practice: STATION 1 LABEL WHAT EACH NUMBER IS TELLING YOU

Practice: STATION 1 Air Pressure Temperature Precip. Dew Point % Cloud Clover Change in Air Pressure Inches of Precip. Wind Speed & Direction

Practice: STATION 1 Fill out the chart for STATION 1 only!

18 65 999. 8 Fog Overcast South 25 1002. 8

Homework Complete the rest of the stations in PART 1 & PART 2

Exit Ticket: Complete using image Determine the… 1. Temperature 2. Type of Precipitation 3. Air Pressure 4. Air pressure 3 hrs ago 5. Wind Direction AND speed