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<br />002498 <br /> <br />Standby Status: Standby status occurs when no precipitation is <br />forecast or occurring in the target area, or when conditions are not <br />suitable for snow augmentation by cloud seeding, either because of <br />snow condition, cloud temperatures, or flood conditions. During <br />this situation, the general procedures would be to maintain a low- <br />level monitoring of weather conditions, and to proceed with data <br />analysis from previous operational periods. A daily rawinsonde <br />sounding would be taken at 0600 (1400 G.m.t) hours to provide <br />forecasting data support for the oncoming day's operational status, <br />and to provide a baseline data set for later analysis. If there <br />are clouds in the vicinity, the radar should be engaged to provide <br />at least two sets of observations during the day as an aid to <br />forecasting. <br /> <br />If precipitation is observed in the study area during the standby <br />status, the project status immediately would be changed to alert <br />if all other criteria are met. This, however, may be overridden <br />by the project meteorologist if he anticipates no more than 1 hour <br />of light precipitation. <br /> <br />During the standby period, project personnel would be engaged in <br />data reduction, including further classification of storms, and <br />collation of meteorological observations. <br /> <br />, <br />, <br />p <br />. <br />b <br />r, <br />" <br />~ <br /> <br />Alert Status: MBA suggested that an alert status be declared when <br />a forecast indicates a strong possibility of seedable precipitation, <br />or when precipitation is observed and shows indications of con- <br />tinuing beyond a l-hour duration. The precipitation telemetry <br />system would be checked and a record of the operational status of <br />all stations prepared. The project radar would be engaged to keep <br />an active watch over incoming precipitation clouds. Cloud tops <br />would be measured, to be compared with rawinsonde measurements <br />taken earlier in the day, and corrected for diurnal influences and <br />frontal behavior. Two hours prior to forecast precipitation, a <br />rawinsonde sounding would be made to refine the forecast and to <br />indicate prefrontal behavior. If precipitation is occurring, and <br />shows strong signs of continuing beyond a l-hour period, a rawinsonde <br />would be sent up immediately. <br /> <br />I <br />~ <br /> <br />During this status, the aircraft would be prepared for possible <br />seeding and observational missions and crews prepared for takeoff <br />at 30 minutes' notice. Flight crew standby and operations would <br />be maintained throughout a southerly convective seeding situation. <br /> <br />The project meteorologist would prepare a final preoperational <br />forecast including cloud top temperatures, freezing level, wind <br />direction, and extent of convection expected. On this basis, the <br />aircraft would be prepared with seeding material and generators <br /> <br />21 <br />