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<br />column to be used to provide a forecast. He then calculates the average <br /> <br /> <br />rainfall over the watershed for a one-hour period by collecting the individual <br /> <br /> <br />rainfall observations of the volunteer observers. Using the flood index and <br /> <br /> <br />an average watershed rainfall, the coordinator can produce a forecast. For <br /> <br />illustration purposes (Figure 9), assume that the current flood index is 3.5 <br />inches, and that average of 6.1 inches of rain has occurred in six hours over <br />Yellow Creek. Enter the row marked FI (flood index) to 3.5 inches. Follow <br />down the column of rainfall values under 3.5 and find 6.1. Now proceed left <br />along the row and find a stage of 19 ft. The forecast is that 19 ft. will <br />occur at the gage (7 ft. above flood stage) six hours after the heavy rain <br />ends. <br /> <br />. <br /> <br />E.2. Autoasted Data Collection and Processing EquipBent <br />In an automated system, data are gathered at strategically located remote <br /> <br />sites and transmitted to a centralized location for automated processing and <br /> <br />analysis. The processing hardware is under the control of the local agency <br /> <br />that has responsibility for the flood warning program. Similar equipment may <br />be located at the state emergency operations center (EDC) and/or at the <br />nearest NWS office responsible for flood forecast and warning. The components <br />of the system are a radio receiver for receipt of event-reported radio signals <br /> <br />and a dedicated microcomputer system. The data collection system operates <br /> <br />continuously in a fully automatic mode, constantly receiving data and <br /> <br />processing information for display to the user. <br /> <br />. <br /> <br />Because automated systems collect a great quantity of incoming data, the <br /> <br />computer located at the base or receiver station must have a data processing <br /> <br />system. Incoming data must be screened for errors and posted properly in a <br /> <br />34 <br />