Do Now 1. What can you remember about the weather?2. What happens during a cold front?3. What do you remember about the weather map

shown below?

Announcements• You will not have my class again until

Friday. • Good luck with EOGs!

Going back in time…

• To weather!

Changes in Weather

__________: a large body of air that has the same properties as the surface over which it develops.

Air Mass

6 air masses effect U.S.

                                                                                     

Pressure SystemsAtmospheric Pressure:- caused by air molecules pushing on the Earth’s surface- determined by temperature, density, and water vapor in the air

                                                                                                                                                                                                               

         

________________: air flows downward and outward in a clockwise spiral.

High Pressure

Brings fair weather – hard for air to rise and

form clouds

______________: air flows upward and inward in a counterclockwise spiral.

Low Pressure

Brings cloudy weather

_______: boundary

between two different

pressure system.

Front

_____________: develops when a less dense warm air mass slides over a descending cold air mass.

Warm Front

____________: cold air mass pushes under a warm air mass and forces the warm air steeply up.

Cold Front

Cumulous/cumulonimbus clouds – move slower than

warm front

_________________: two cool air masses merge and force warm air upward.

Occluded Front

Strong winds and heavy precipitation

__________________: pressure differences cause a warm from or a cold front to stop moving.

Stationary Front

Same place for days – light wind and precipitation

across entire front

2. Severe Weather

_______________: heavy rainfall,

lightning flashes, thunder, and maybe

hail.

Thunderstorm

Warm moist air forced upward rapidly, cools,

condenses – cumulonimbus cloud

Air builds up + and – electrical charges;

current flows between opposite

charges and __________ is produced.

lightning

Rapid heating of air around a lightning bolt

creates _________.thunde

r

__________: violent whirling wind that moves in a narrow

path over land usually SW to NE.

Tornado

                                           

_____________: wind moving in different

directions, at different speeds, and at different

elevations.

Wind Shear

___________: large, swirling, low

pressure system that forms over tropical oceans.

Hurricane

Most powerful storm

Project

• In partners, you will be writing a weather report for Charlotte for the weekend.