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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region for the initial study would be the northwestern portions
of the Rim (the Verde River drainage), bounded approximately
on the north by Interstate highway 40 Lrom Williams and Flagstaff,
to Arizona Hi9~way 260 from Payson to Heber, on the south.
This region is shown in Figure 2.1, where three sections of
the area have been blocked out from northwest to southeast.
These blocks indicate the airspace that were assigned for
research flights in coordination with the FAA Albuquerque
Air Route Traffic Control Center. Primary operations were
conducted in Area 2, since it was the least restricted by
aircraft usage conflicts. Areas 1 and 3, which had the smallest
area and the most operating restrictions respectively, were
studied much less intensively.

2.2 Objectives and Approach for the 1986-87 Pield Season

Despite the fact that the field research area shifted
to a portion of the Colorado River drainage in Arizona instead
of Colorado, the major objectives of the CRADP remained unchanged.
Specific objectives of the exploratory program were to:

1) Examine the frequency of occurrence, amounts, and
spatial and temporal distribution of supercooled
liquid water (SLW).

2) Examine the meteorological conditions associated
with the occurrence of SLW and estimate their importance
in its production or depletion.

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