Precipitation specific amount, basis. Radar imagery forecasting techniques show higher skill than model forecasts within six to seven hours of the time of the radar image. The forecasts can be verified through use of rain gauge measurements, weather radar estimates, or a combination of both. Various skill scores can be determined to measure the value of the rainfall forecast. Precipitation In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravity. The main forms of precipitation include drizzle, rain, sleet, snow, graupel and hail. Precipitation occurs when a portion of the atmosphere becomes saturated with
Global storm activity of 2008 States, eastern Quebec and the Canadian Maritimes with heavy snow, and high winds along the coast. Several areas across Maine, New Brunswick received snow amounts in excess of with as much as locally across the Gaspe region. A low pressure system moving northward up the East Coast caused snow and rain to overspread the Mid-Atlantic region on January 17 and 18. Many spots started off as snow, with a gradual changeover to sleet, freezing rain and then finally rain as the storm slowed down. The greatest concern for accumulating ice was in western North Carolina, while the greatest accumulations of