UK Weather Hazards

The UK may not experience tropical storms or volcanic eruptions, but it is affected by a range of weather hazards that can cause significant disruption, damage, and even loss of life. This lesson covers the types of weather hazards that affect the UK, the role of the jet stream, and the factors that make the UK's weather so changeable.

---

Why Is UK Weather So Changeable?

The UK's location and geography make it particularly prone to variable weather:

1. Mid-latitude position (~50–60° N) — at the boundary between the cold Polar cell and the warm Ferrel cell.
2. Maritime location — surrounded by ocean, which moderates temperatures but also brings moisture-laden air.
3. Prevailing south-westerly winds — bring warm, moist air from the Atlantic Ocean.
4. The jet stream — a fast-flowing ribbon of air at high altitude that steers weather systems across the UK.

The Jet Stream

The jet stream is a narrow band of fast-moving air (up to 200 mph) at altitudes of 9–16 km. It flows from west to east and marks the boundary between cold polar air and warmer subtropical air.

Key points about the jet stream: