Weather Phenomena Flashcards
Are depressions low or high pressure?
Low pressure
What temperature of air is found in depressions?
Warm air
How are the isobars in a depression spaced?
Close together
Where are depressions found in relevance to the Uk?
Off the south west coast
Do anticyclones move fast or slow?
Slow
What speed of winds do anticyclones have?
Low
What type of pressure do anticyclones have?
High pressure
Do anticyclones have hot or cold air?
Cold air
What is another name for a hurricane?
A tropical cyclone
What 5 conditions does a tropical cyclone need to form?
26 degree oceans 5 degrees N or S of the equator Low vertical wind sheer Moisture in mid troposphere Sea of at least 30m deep
What is the origin of tropical cyclones?
As a tropical wave passing westward across an area of low pressure
What is occurring in a cold front?
The cold air is undercutting the hot air because it is denser
This three weather phenomena are seen with a cold front?
Heavy rain, colder air and a clockwise shift in wind direction
What three weather phenomena are seen with warm fronts?
Hot air, rain and a veering of wind direction
What is occurring in a warm front?
The warm air is overriding the cold air
