Weather

4. An instrument for measuring the quantity of rain that has fallen.
5. A low, generally gray cloud layer with a fairly uniform base.
9. a measure of the internal energy that a substance contains.
11. The composite or generally prevailing weather conditions of a region, throughout the year, averaged over a series of years.
12. Any high flow, overflow, or inundation by water which causes or threatens damage.

1. The sound caused by rapidly expanding gases in a lightning discharge.
2. water droplets suspended in the air at the Earth's surface
3. In general, a tornado occurring over water. Specifically, it normally refers to a small, relatively weak rotating column of air over water beneath a Cb or towering cumulus cloud.
6. Precipitation in the form of ice crystals, mainly of intricately branched, hexagonal form.
7. An extratropical low or an area of sustained surface winds of 34 (39 mph) to 47 knots (54 mph).
8. A whirling mass of air in the form of a column or spiral. It need not be oriented vertically but, for example, could be rotating around a horizontal axis.
10. A luminous arc featuring all colors of the visible light spectrum.