Weather Patterns

Front 1

Maritime Tropical (Air mass)

Back 1

1. Form over the gulf of Mexico and Atlantic ocean
2. Warm humid air

Front 2

Maritime Polar (Air mass)

Back 2

1. Form over the icy cold North Pacific and North atlantic oceans
2. Cold humid air

Front 3

Continental Tropical (Air mass)

Back 3

1. Form over summer, dry areas like South West and North Mexico. FORM OVER DRY LAND ONLY!

Front 4

Continental Polar (Air mass)

Back 4

1. form over central and northern Canada and Alaska
2. bring cool or cold air

Front 5

How do air masses move?

Back 5

West to East

Front 6

Cold fronts

Back 6

1. dense air tends to sink
2. move quickly
3. causes abrupt weather changes

Front 7

Warm Fronts

Back 7

1.Clouds, storms, and rain accompany
2.moves over cold air (warm air rises)
3. Moves slower than a cold front

Front 8

Stationary Fronts

Back 8

1. Occurs when warm and cold air masses meet but neither one has enough force to move the other
2. Can cause days of precipitation

Front 9

Occluded Fronts

Back 9

1.A warm air mass is caught between two colder air masses.

Front 10

Cyclone

Back 10

1. A swirling center of low pressure
2. Usually brings storms

Front 11

Anticyclone

Back 11

1.The center of high pressure of dry air
2. Move counter-clockwise

Front 12

Thunder Storms

Back 12

1. Heavy rain clouds with thunder and lightening
2. Form within large cumulonibus clouds(clouds that form on hot humid days)
3. as warm humid air rises rapidly it cools forming dense thunderheads
4. produce strong upward ad downward winds- updrafts and downdrafts

Front 13

Lightening

Back 13

sudden spark of ennergy discharge

Front 14

Thunder

Back 14

super heated air expanding

Front 15

Thunder storm safety

Back 15

1. Avoid touching metal or water

Front 16

Tornadoes

Back 16

1.a rapidly whirling funnel- shaped cloud that touches Earth's surface

Front 17

How do tornadoes form?

Back 17

1. They develop in low heavy cumulonimbus clouds
2. They usually develop in late spring, early summer

Front 18

Tornadoe saftey

Back 18

1. Stay away from glass or doors that can break or shatter.
2. Refuge shelter in a basement or well built building

Front 19

How Hurricanes Form

Back 19

1. Over water in a low pressure area
2. or as a tropical storm

Front 20

The Eye of a Hurricane

Back 20

1. The eye is the center of the hurricane
2. The weather in the eye is calm, quiet, and clear

Front 21

How do hurricanes move?

Back 21

Easterly trade winds

Front 22

Hurricane damage

Back 22

1. Brings high waves and severe flooding
2. uproots trees smashes buildings ad destroys powerlines
3. Storm surges causes flooding

Front 23

Hurricane Safety

Back 23

1. Leave (evacuate)

Front 24

Winter Storms

Back 24

1. Snow fall when humid air cools below 0 degrees celcius

Front 25

Lake-effect snow

Back 25

1. a phenomenon created when cold dry air passes over a large warmer lake, such as one of the Great Lakes, and picks up moisture and heat

Front 26

Snow storm Safety

Back 26

1. Find shelter

Front 27

Flash Floods

Back 27

1. Occurs when so much water pours into a stream or river that it overflows its banks and covers the land on either side
1. Flash flood- sudden violent flood occurs within a dew hours or minutes
3. Most are due to large amounts of rain

Front 28

Predicting Floods

Back 28

1. Advance warning- can help reduce flood damage and loss of life
2. Weather satellites- Supply info about snow cover to predict run-off
3. Radar- Can track and measure the size of an approaching storm

Front 29

Emergency Flood Saftey

Back 29

1. Move to higher ground and stay away from flood waters (don't drive on flooded roads)

Front 30

Other Flood Hazards

Back 30

1. Can knock down electrical poles and wires
2. Flood waters can saturate soil which causes mudslides and land slides
3. Can wash into wells and water treatment plants

Front 31

Weather Forecasting

Back 31

1. Falling air pressure approaching low area could mean snow or rain
2.meterologist- a scientist who studies the causes of weather and try to protect it

Front 32

cumulus clouds-

Back 32

warm afternoons

Front 33

cumulonimbus clouds-

Back 33

thunderstorms

Front 34

cirrus clouds-

Back 34

low pressure area

Front 35

Weather Technology

Back 35

1. Changes in technology have occured in two areas: gathering weather data and using computers t make forecasts

Front 36

Weather Ballons and Satellites

Back 36

1. weather ballons- carry instruments high into the troposphere and stratoshpere
2. they find temperature, air pressure, and humidity
3.First satellite- 1960
4. Satellites photograph the Earth's surface

Front 37

Computer forecasts

Back 37

each forecas builds on a previous one

Front 38

El Nino

Back 38

1. long-term weather patterns may be caused by changes in the ocean currents and gobal winds
2. occurs in tropical Pacific Ocean
3.During winds shift and push warm surface water towards the coast of South America
4.These events occur once every 2-7 years

Front 39

weathermap-

Back 39

a snapshot of conditions at a particular time of a large area