Air masses

• Arctic Maritime:

  -          Comes from the Atlantic

  -          Comes from north of UK

  -          Cold front

  -          Brings cold, clear weather as well as rain.

  -          Occurs from May to October
• Polar Maritime:

  -          Comes from the Atlantic

  -          Northwest of UK

  -          Cold front

  -          Brings cold wet weather.

  -          Any time of year
• Tropical Maritime:

  -          Comes from the Atlantic

  -          Southwest of UK

  -          Warm front

  -          Brings warm wet weather.

  -          Summer months

  -          Prevailing wind
• Tropical continental:

  -          Comes from dryland of Europe and Asia

  -          Southeast of UK

  -          Warm front

  -          Warm, dry summer weather

  -          Summer Months
• Polar Continental:

  - Comes from dryland of Europe and Asia

  - East of UK

  - Cold front

  - Brings cold, dry weather.

  - Occurs from November to April