WMOD00378

• Title: Physical Investigations of Winter Orographic Clouds in Utah
• Date: 3/1/1984
• State: UT
• Weather Modification - Doc Type: Report

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necessary to answer this question. The sample of precipitation data is

too small as yet to warrant such analysis. The present report is

concerned only with the physical analysis and evaluation of the opera-

tional program. A future statistical analysis and evaluation of the

program would have ready access to the required precipitation data through

the Utah Division of Water Resources.

The physical research reported here has followed the three..,level

approach described in the proposal submitted to NOAA leading to the

current contract (Utah Division of Water Resources, 1982). A first level

of analysis has been performed by the subcontractors responsible for each

of the data acquisition systems used in the field. The reports of these

subcontractors have been received by the Utah Division of Water Resources.

Each subcontractor and the title and author (s) of its report are listed in

Table 1. A second level of analysis has combined the information in the

reports of the subcontractors with results of further analyses by the

present author into a comprehensive picture of the STORMS observed in the

project area. The combined analysis constitutes the bulk of the present

report. A third level of analysis completed by Griffith et~. (1983) has

considered the climatological representativeness of the weather during the

study period. That level of analysis is included in the present report.

This report is organized as follows. Section 2 describes the Utah

operational seeding program and the randomization of the program employed

in the research area. Section 3 describes the 1983 field research program

including the study area, the instrumentation and their purposes, the pro-

cedures followed in the field for gathering data on a specific STORM, and