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<br />) <br /> <br />4.0 OPERATIONS <br /> <br />The program was operational from February 1 through March 31, 1994. There <br />were a total of eight stonn periods that were seeded during this period on portions of <br />fourteen days. In general this was a dry period with few stonn systems. Those stonns <br />which did occur were weak. Precipitation amounts were below nonnal for both February <br />and March. <br /> <br />4.1 Onerational Procedures <br /> <br />The NA WC meteorologist monitored the local weather on a day to day basis, <br />using NWS infonnation. A short-tenn forecast was developed and updated by the <br />meteorologist with emphasis on weather systems that would be favorable for cloud <br />seeding opportunities. Wind directions and speeds, temperature structure of the <br />atmosphere and precipitation possibilities were the crucial factors forecast on the <br />program. A daily logbook was maintained which briefly described weather conditions <br />and program activities. <br /> <br />I ) <br /> <br />When a seedable weather situation was identified by the meteorologist, the <br />monitoring of weather conditions would intensify. As the weather system approached <br />the target area, a seeding schedule was developed by the NA WC meteorologist indicating <br />which CNGs to activate and at what time. If a detennination on when to end the CNG <br />operation could be made at the beginning of the stonn period, then the CNG operator <br />was given this infonnation along with the times that the CNGs were to be activated. <br />However, a detennination of when to end the seeding operations usually was not made <br />until later in the stonn episode. <br /> <br />.' <br /> <br />The CNG operators were contacted no earlier than 12 to 18 hours before the CNG <br />needed to be activated. Frequently the activation time was within an hour of being <br />contacted. The length of CNG operation varied greatly from stonn to stonn. All CNGs <br />4-1 <br />