WMOD00426

• Title: Desert Research Institute Fields Operations - 1994 NOAA/UTAH Field Program - Final Report
• Date: 11/1/1994
• Weather Modification - Doc Type: Report

described by Huggins (1990) and Huggins and Sass en (1990). As with the 199() study,
the chemical analysis determined that snowfall at the selected target did not contain
silver above background for a significant percentage of the seeding periods. These
results lead to changes in experimental approach in NOAA/Utah and to the set of
seeding experiments that were conducted in 1994.
During the 1994 field program, snow samples were captured at TAR in a 1.2 m
diameter collection cylinder covered with clean plastic. Field technicians removed the
snow from the cylinder at intervals of 10 to 30 minutes, depending on snowfall rate,
transferred the snow to clean plastic bags, labeled the bags and stored them in an ice
chest at TAR until the end of an experiment. The samples from all experiments were
stored in a freezer at field headquarters. Table 6 documents the days and time periods
during which samples were collected at TAR. Of the 10 days on which samples were
taken, six have sufficient samples to resolve temporal changes during the experiments.
Following the field program all of the samples were taken back to DRI in a freezer
transported by the mobile radiometer. To date the samples have been prepared for
chemical analysis. The specific sample times, the mass of snow in each sample and the
computed precipitation rate for each sample time period are contained in Appendix B.

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