WMOD00284

• Applicant: Thompson, J.R., G.W. Wilderson, and D.A. Griffith, North American Weather Consultants
• Sponsor Name: USBR
• Title: Cloud Seeding Data Collection, and Analysis Assoc. with the Colo River Augmentation Demonstration Program
• Prepared For: USBR, Divison of Atmospheric Research
• Prepared By: Thompson, Wilderson, Griffith
• Date: 12/1/1987
• State: AZ
• Weather Modification - Doc Type: Scientific Study

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was determined that the Bureau would conduct an exploratory
program within Arizona. The purpose would be to examine the
suitability of winter clouds for possible future weather modifi-
cation activities aimed at enhancing the winter precipitation
on Arizona's high plateau region. This obviously fortuitous
chain of events led to the development of the field program
that was conducted during a portion of the 1986-87 winter
season in Arizona. Since the area of the investigative study
was still within the Colorado River drainage, NAWC continued
to fulfill its contractual obligations by providing support
to the Bureau's efforts, except no actual cloud seeding was
conducted during the field season.

The bulk of this final report is aimed at reporting NAWC's
activities during the Arizona field program and subsequent
data reduction and analysis of that data. However, where
relevant, portions of the report also touch on the previous
work on the Grand Mesa, e.g., the results of the seeding experi-
ments briefly discussed above and in the concluding section
of this report.

Preparatory to conducting the field program in Arizona,
the Bureau prepared an Operations plan which described the
goals of the program and detailed the methods and equipment
to be used during the program. This Operations Plan contains
relevant portions of NAWC's Work Plan, which was developed
to outline the areas of responsibility of NAWC and to detail
the Contractors role in providing support to the project.
Some portions of the Operations Plan have been included within
this final report, either verbatim or in some cases summarized.
This is particularly true for some of Section 2, which deals
in part with a description of the equipment and facilities
used by NAWC (and the Bureau) on the field program.

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