Abstract: The relationship between circulation and heavy snowfall over the western United States is studied as a means of improving operational forecasts for that region. The models developed relate occurrence of heavy snowfall in ...

Abstract: The jet stream is recognized as an important atmospheric mechanism for vertical exchange processes. It follows that certain jet stream positions relative to moisture source regions bring about occurrences of extensive heavy ...

Abstract: The worst east coast storm of 1971?72 developed very rapidly and reached maturity at extreme southerly latitudes. To a large degree, the development was forecast more than two days in advance by use of the National ...

Abstract: It is generally known that certain relationships exist between the production of heavy snow and low-level dynamic and thermodynamic parameters, such as vorticity, moisture, and temperature advection patterns. This statistical ...

Abstract: The daily net energy available for heating the air from 0300 GMT to the following afternoon, as determined by Myers, is used to compute objectively the maximum temperature expected under static, clear-sky conditions at 12 ...

Abstract: Verification shows that recent guidance and official heavy snowfall forecasts have achieved only a modest degree of success. Therefore, the synoptic-climatological relationship of heavy snowfall to those, surface and ...

Abstract: No Abstract Available.

Abstract: During the past two years, the Quantitative Precipitation Forecast Unit of the National Meteorological Center has collected, as a by-product of its verification program, a large quantity of data relating to observed ...

Abstract: This article describes and illustrates an objective technique of forecasting clouds, precipitation and precipitation amounts. The system is tailored to fit the specific operation of the National Meteorological Center in ...