Weather hazards associated with high & low pressure systems Flashcards Preview

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Flashcards in Weather hazards associated with high & low pressure systems Deck (18)
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1

What are low pressure systems known as?

Depressions

2

What do depressions bring?

Wet, stormy, windy weather

3

What are the hazards in the British Isles with Depressions?

Flood

4

What are the three different fronts

Warm Front
Cold Front
Occluded Front

5

What is a Front?

Leading edge of an air mass

6

Explain warm fronts

- Warm air rises over cold air
- Cools & Condenses

7

Explain Cold Fronts

- Fast moving cold air drives warm air upwards to cool and condense quickly
- Get bigger towering clouds and heavy rainfall

8

Give a Case study of a Flood?

Gloucester Floods - July 2007 - Heavy Rain

9

Give the impacts of the floods in Gloucester

- Hundreds of homes & businesses under water
- Emergency Services Overwhelmed
- Power Supplies Down

10

Give a Case Study to show Tropical Storms

Hurricane Katrina - Aug 2005 (Louisiana USA)

11

Give the impacts of the Hurricane Katrina? 

- 80% of city was flooded
- 1200 died
- One million left homeless
- $80 billion damage

12

Give another case study to show tropical storms

Hurricane Jeanne - 2003

13

What are High pressure systems known as?

High - Anti-cyclones

14

What do Anti-Cyclones bring?

Warm, stable conditions. Clear skies

15

What are the hazards in the British Isles with Anti-Cyclones?

Drought

16

Give an examples of drought in UK?

Drought of 2004

17

Give the impacts of the Drought of 2004

- Hose pipe bans
- Fish died - Low oxygen levels

18

Give an example of another drought?

Mali in Sahel region - Africa