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<br />I~. <br /> <br />~ <br /> <br />" <br /> <br />003366 <br /> <br />TABLE 2 <br />METEOROLOGICAL SEEDING CRITERIA <br /> <br />Cloud base water - Natural Precipitation <br /> <br />Cloud systems with a cloud base water content of 1.5 gms/kgm (North <br /> <br /> <br />Sector) to 1.8 gms/kgm (South Sector) or greater will be considered as <br /> <br /> <br />potentially seedable. In this consideration a weather system will be <br /> <br /> <br />evaluated for seeding potential if it is determined that at least natural <br /> <br /> <br />precipitation is likely to occur. <br /> <br /> <br />Effective temperature Pre-trough or Pre-frontal <br /> <br /> <br />Cloud systems with a SOO-ME temperature of -270C or warmer will be <br /> <br />considered as potentially seedable. <br />Effective temperature Post-trough or Post-frontal <br />Cloud systems with cloud top temperatures of -270C (North Sector) <br />to -30oC (SouthSector~ will be considered as potentially seedable. <br />Barrier level winds <br /> <br /> <br />Wind speeds from favorable directions at heights approximately 2,000 <br /> <br /> <br />feet above the seeded barrier of 30 knots or less for pre-trough cloud <br /> <br /> <br />types and up to 40 knots or less for post-trough clouds will be considered <br /> <br /> <br />as potentially favorable for seeding treatment. Some adjustments are <br /> <br /> <br />made to the acceptable wind velocity ranges depending on the width of <br />the barrier to be seeded. <br /> <br />Cloud base height <br /> <br />Cloud systems with bases less than 2,000 feet above the mean barrier <br /> <br />height will be considered as potentially seedable. <br /> <br />21 <br />