WMOD00320

• Project Name: Colorado River Basin Pilot Project
• Title: Comprehensive Evaluation Report - Five Winter Seasons 1970-1971...1974-1975
• Date: 10/1/1976
• Weather Modification - Doc Type: Report

Section Page
5.2 Selection of Time Blocks . . . . . . . . . . . . . . 5-2
5.3 Spatial Blocks of the Orographic Profile . . 5-3
5.4 Exclusion of Blocking Flow Cases 5-7
5.5 Formulation of Hypotheses . . . . 5-8
5.6 A Conceptual Model of Orographic Seeding 5-9
5.7 Definitions of Air Mass Parameters . 5-18
5.8 Diagnostic Analysis Procedures . . . . . . . . . . . 5-20
5.9 Analysis by Octile Stratifications . . . . . . . 5-25
5.10 Analysis by Mu1tiparameter Windows . . . . . . . 5-33
5.11 A Criterion for Precipitation Efficiency . . . 5-46
5.12 Synoptic Climatology of Frontal Passages . 5-57
5.13 Cloud Seeding Potential for Precipitation Enhancement 5-60
5.14 Interpolated versus Experimental Soundings 5-61
5.15 Estimation of Seeding Potential 5-69
5.16 Preliminary Results from an Orographic Water
Balance Model . . . . . . . . . . . . . 5-79
5.17 Critique of Diagnostic Analysis . . . . 5-87
6.0 SUMMARY DISCUSSION AND RECOMMENDATIONS 6-1
6.1 Forecasts . . . . . . 6-3
6.2 Wind and Convection . . . . 6-6
6.3 Blocking Flow 6-7
6.4 Overseeding . . . . . . . . 6-9
6.5 Retrospect . . . . . 6-10
6.6 Suggestions 6-11
REFERENCES . . . . . . . . . 6-17

APPENDICES

A1 - Precipitation totals for entire 24-hour experimental
days for each year.

A2 - Precipitation totals for hours following declaration
of experimental day until 1100 MST on the following
day for each year.

A3 - Totals and hourly averages of precipitation and ratio
of treat/control for entire 24-hour experimental days
for each year.

A4 - Stretch-shrink rank sum test for each year.

ii