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<br />mid-February, 1983. The University of North Dakota Citation <br />II instrumented aircraft was then the main data source. This <br />aircraft was again utilized from late November to late <br />December, 1983, as part of a larger five month (Nov. - Mar.) <br />field program. Other data collection platforms that season <br />included a microwave radiometer, 5- em vertical pointing <br />radar, ground PMS 2D-C station and high resolution precipita- <br />tion gauges. The November 1984 through March 1985 field <br />program ws similar except that a K-band radar was used and no <br />aircraft was available. <br /> <br />Spatial Distribution of SLW <br /> <br />The SLW data from 24 aircraft missions were summarized. It <br />showed that SLW was generally found at any in-cloud flight <br />level but lower levels were wettest. The frequency of SLW <br />was greater with northwest flow across the along axis of the <br />Mesa than with southwest flow parallel to the long axis. In <br />both cases .the SLW was greatest above the windward slope and <br />Mesa top and was rapidly depleted by subsidence to the lee. <br />By chance, the missions sampled more northwest than southwest <br />flow cases although the latter are believed to occur more <br />frequently and are wetter. <br /> <br />Temporal Distribution of SLW <br /> <br />Vertical-pointed microwave radiometer observations from the <br />south edge of the Mesa were summarized for a five month <br /> <br />22 <br />