Weather

4. a device for collecting and measuring the amount of rain which falls.
5. a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.
8. the boundary of an advancing mass of warm air.
10. water which collects as droplets on a cold surface when humid air is in contact with it.
12. the atmospheric temperature below which water droplets begin to condense and dew can form.
14. the boundary of an advancing mass of cold air, in particular the trailing edge of the warm sector of a low-pressure system.

1. the occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud.
2. an instrument for measuring and indicating temperature.
3. pellets of frozen rain which fall in showers from cumulonimbus clouds.
6. cloud forming a continuous horizontal gray sheet, often with rain or snow.
7. a storm with a violent wind.
9. an overflowing of a large amount of water beyond its normal confines, especially over what is normally dry land.
11. a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility.
13. the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.
15. moisture condensed from the atmosphere that falls visibly in separate drops.