Characteristics of precipitation occurrence over B.C. / Peter Haering, chief meteorologist. : En57-44/83-014E-PDF

"Pacific Region Technical Note 83-013 'Verification of 3-5 Day Forecasts' suggested that the precipitation regimes (occurrence of precipitation) are not homogeneous over the province. This also implies that the method of verification is quite important and that meaningful verification requires knowledgeable interpretation. In the above mentioned study before a precipitation event was defined, 2 stations in an area required measurable precipitation. This leads to the question: 'What if one or three or four stations had been required to report precipitation to determine a precipitation event would the results have changed?' Also, should the variability that exists in the occurrence of precipitation over a forecast area be considered when writing forecasts or when using probability of precipitation statements?"

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