The northern half of Africa is occupied by the world's most extensive hot, dry region, the Sahara Desert. Winter Spring Summer Autumn. Heavy rain in Glenshaw, Pennsylvania The sound of a heavy rain fall in suburban neighborhood.
The fine particulate matter produced by car exhaust and other human sources of pollution forms cloud condensation nuclei , leads to the production of clouds and increases the likelihood of rain. Orographic lift , Precipitation types meteorology , and United States rainfall climatology. In heavily populated areas that are near the coast, such as the United States' Eastern Seaboard , the effect can be dramatic: One of the main uses of weather radar is to be able to assess the amount of precipitations fallen over large basins for hydrological purposes. Elevated portions of weather fronts which are three-dimensional in nature  force broad areas of upward motion within the Earth's atmosphere which form clouds decks such as altostratus or cirrostratus. In mountainous parts of the world subjected to relatively consistent winds for example, the trade winds , a more moist climate usually prevails on the windward side of a mountain than on the leeward or downwind side.
Unionville, Maryland , USA. Normal Monthly Precipitation, Inches. At sea level and without wind, 0. Meteorology at the Millennium. To produce radar accumulations, rain rates over a point are estimated by using the value of reflectivity data at individual grid points.
Moisture is removed by orographic lift, leaving drier air see katabatic wind on the descending and generally warming, leeward side where a rain shadow is observed. The sound of a heavy rain fall in suburban neighborhood. In addition, because of the great temperature difference between cloud and ground level, these ice crystals may melt as they fall and become rain.
Rain holds an important religious significance in many cultures. In temperate climates , people tend to be more stressed when the weather is unstable or cloudy, with its impact greater on men than women. Part of the nature series. Windward sides face the east to northeast trade winds and receive much more rainfall; leeward sides are drier and sunnier, with less rain and less cloud cover.
In South America, the Andes mountain range blocks Pacific moisture that arrives in that continent, resulting in a desertlike climate just downwind across western Argentina. Tropical cyclones , a source of very heavy rainfall, consist of large air masses several hundred miles across with low pressure at the centre and with winds blowing inward towards the centre in either a clockwise direction southern hemisphere or counter clockwise northern hemisphere. British Journal of Nutrition. The influence of mesoscale orography on a coastal jet and rainband. For other uses, see Rain disambiguation and Rainy disambiguation. Radar-derived rainfall estimates compliment surface station data which can be used for calibration.
The large size is explained by condensation on large smoke particles or by collisions between drops in small regions with particularly high content of liquid water. The wet season is a time when air quality improves,  freshwater quality improves,   and vegetation grows significantly. Archived from the original on 26 February
Retrieved 23 December Arizona in an Icebox? In South America, the Andes mountain range blocks Pacific moisture that arrives in that continent, resulting in a desertlike climate just downwind across western Argentina. Implications for the Continental U. Rain holds an important religious significance in many cultures.
University of Michigan Press. Eastern portions of North and South America, northern Europe, and northern and central Asia have become wetter. If there is a shallow near surface layer that is below freezing, freezing rain rain which freezes on contact with surfaces in subfreezing environments will result. Archived at the Wayback Machine.
Archived from the original on January 14, University Corporation for Atmospheric Research. A common biome in this area is the tundra which has a short summer thaw and a long frozen winter.
A radar equation is then used, which is,. One of the main uses of weather radar is to be able to assess the amount of precipitations fallen over large basins for hydrological purposes. Smaller drops are called cloud droplets, and their shape is spherical. The wet season is a time when air quality improves,  freshwater quality improves,   and vegetation grows significantly. Environment portal Ecology portal Water portal.
A radar equation is then used, which is,. Earth's 'evil twin ' . University Corporation for Atmospheric Research. The heaviest rain is seen in reds and yellows.