Across
- 5. widespread,long lived,straight lined wind storm.
- 7. when up drafts are balanced by down drafts.
- 9. result of localized convection in an unstable air mass.
- 12. occur along the boundaries of weather fronts (e.g coldfront).
- 15. thunderstorm which produces hail that reaches the ground.
- 16. visible mass of condensed water vapour floating in the atmosphere,typically high above ground.
- 17. prolonged period of excessively hot weather, which maybe accompanied by high humidity.
- 19. occurance of a natural electrical discharge of very shortduration and high voltage.
Down
- 1. rapidly rotating storm system characterised by a low pressure system,strong winds and a spiral arrangement of thunderstorm that produce heavy rain.
- 2. action of warm air rising and cold air sinking.
- 3. area of closed, circular fluid motion rotating in the same direction as earth.
- 4. condensed moisture of the atmosphere falling visiblyin seperate drops.
- 6. disturbed state of an astronomical body's atmosphere especially affecting it's surfcace.
- 8. caused by air that is forced up by a mountain or hillside.
- 10. violentily rotating column of air.
- 11. intense column or vortex that occurs over a body of water.
- 12. collection of liquid water droplets or ice crystals suspended in the air or near the earths surface.
- 13. of frozen rain.
- 14. line of thunderstorms that can form along or ahead of a cold front.
- 18. very localised column of sinking air.