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Show 140 Utah Academy of Sciences, Arts and Letters 1. 2. Romantic release of emotion and repression. The systematic whetting and commercial exploitation of man's "naturally good" desires. 3. Vastly developed centralized government with despotic powers justified on humanitarian grounds. The Use of 700,..Millibar Data In Precipitation Forecasting For Utah Archer B. Carpenter Supervising Forecaster, Salt Lake City, Utah This study is an endeavor to make more practical use of the upper air data available to the modern forecaster. The year 1946 was selected for the study. Surface and 700-mb. maps and charts were reviewed simultantously. For each 24-hour period data were selected from two representative Raob stations upstream. Occur rence and non-occurrence of surface precipitation within 700 miles upstream was also noted. Thirteen different combinations of data were tested, and useful parameters were arranged in a table in such a manner that a precipitation index (PI) could be evaluated. . PRECIPITATION INDEX (PI) GROUP 1 TLN ReI. Hum. GROUP 2 BE OG PEV ReI. Hum. ReI. Hum. % % % 0-39 PH LQ G/Kg. GROUP 3 GROUP 4 Days per Month with .01 No Precip. Upstream Precip. Upstream 0-0.9 2 40-S9 3 60-79 0-19 4 80-100 Feb. Oct. Dec. 1.0 May Jan. Jun. 1.1-1.2 Jan. Feb. Mar. Apr. Mar. Jul. Nov. Sept. 20-29 0-19 1.3-1.4 S 30-49 20-29 1.S-1.8 1.9-2.3 Apr. May. Aug. 6 SO-S9 30-49 7 60-79 SO-S9 2.4-3.3 May. Dec. 8 80-89 60-79 3.4-4.3 June 9 90-99 80-89 4.S-S.0 Oct. 90-99 S+ Jan. Feb.· Mar. Apr. Jul. Aug. 10 Sep. Nov. One index value is selected for each group. These values are totaled and if index is less than twenty, no precipitation is forecast. If index is twenty, or over. precipitation is forecast. The use produced 86% of the Precipitation accuracy, and a Index for January, skill score of 68. February and March, 1947, |
