Weather

Across

2. HUMIDITY/ A type of humidity that considers the mass of water vapor present per unit volume of space. Also considered as the density of the water vapor. It is usually expressed in grams per cubic meter.
3. model/is a symbolic illustration showing the weather occurring at a given reporting station. Meteorologists created the station model to plot a number of weather elements in a small space on weather maps. Maps filled with dense station-model plots can be difficult to read, but they allow meteorologists, pilots, and mariners to see important weather patterns.
5. front/ is defined as the leading edge of a cooler mass of air, replacing (at ground level) a warmer mass of air, which lies within a fairly sharp surface trough of low pressure.
6. a scientific instrument used in meteorology to measure atmospheric pressure.
7. FOG /Fog that develops when warm moist air moves over a colder surface, cooling that air to below its dew point.
9. a storm system characterized by a low-pressure center and numerous thunderstorms that produce strong winds and heavy rain.
10. also known as an electrical storm, a lightning storm, thundershower or simply a storm is a form of weather characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder
12. vane/ is an instrument for showing the direction of the wind
13. front/is a density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient

Down

1. is a violently rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud.
4. a device that measures temperature or temperature gradient using a variety of different principles
8. mass/is a volume of air defined by its temperature and water vapor content
11. is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects