Abstract
Using the principle of conserving water substance, themaximumsnowfall amount is related to the saturated vapor mixing ratio at cloud base and cloud top levels. The inherent uncertainties of the input data allow for numerical approximations that lead to a linear relationship betweenmaximumsnowfall and cloud base temperature. To test the validity of this relationship, an analysis was made of the correlation of 24 hour accumulated snowfall measurements with temperature observations from upwind soundings. The data set covered all ofAlberta (except the mountainouswest) for October 1990 to April 1993. The result suggests that the snow amount depends roughly linearly on the 850 hPa temperature with a correlation coefficient of 0.62. The snowfall-temperature relationship can be used to complement the Quantitative Precipitation Forecast (QPF) available from operational NWP models.
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