Weather Patterns

Pressure Systems

Air Masses

Weather Fronts

High Pressure Systems

Low Pressure Systems

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Cold Front

Occluded Front

Stationary Front

Maritime

Continental

Tropical

Polar

Tropical

Polar

Arctic

Warm Front

cold air mass meets warm air mass but little movement occur

a fast cold air catch slow warm airmass

air sinking high pressure air called anti cyclone

air rising low air called depression

moving fast and bring cold temperature

cold in winter and summer

tropic over dry dessert land

bring clear skies and high temperatures

forming over Siberia and Arctic

forming western Atlantic ocean, the gulf of Mexico and eastern of Pacific

moist air masses bring hot and humid to eastern of pacific

temperature are cold and humid

forming northern Atlantic and pacific Oceans

cold air toward warm air

warm air move toward to the cold air

bring Nimbostratus cloud and long rain

weather condition are warm clear

cumulonimbus clouds, thunderstorm, heavy rain, snow

cool temperature and lot of precipitation

cloud and long rain

cold, dry air, temperature can be -40 degree Celsius

in winter can bring heavy snow fall

usually form in summer

measuring weather

thermometer

measuring temperature

rain gauge

measuring rainfall

anemometer

windspeed

barometer

measuring air pressure

windvane

see the wind direction