SPDSS_Task53-2_Collect and Fill Missing Monthly Climate Data

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^ At a location that adequately represents irrigated acreage and variations in climate throughout the SPDSS study area. Key climate stations were selected based on long-term periods of record and location within the basin using the following approach: L Monthly total precipitation and average temperature data for NOAA climate stations stored in HydroBase were extracted using the TSTooI Data Management Interface (DMI). There are approximately 126 NOAA stations within the SPDSS study area. 2. The percent complete for the 1950 through 2003 SPDSS study period was determined for each climate station using the TSTooI "Data Limits Summary" report. 3. The draft SPDSS irrigated acreage GIS coverage and CDSS Climate Station GIS coverages were reviewed to verify that the subset of climate stations provided adequate spatial coverage to represent agricultural areas for the crop consumptive use analysis. In addition, abasin-wide spatial review was conducted to verify overall basin coverage for water budget and ground water modeling efforts. There were several sets of climate stations meeting key criteria from Steps 1 and 2 above that were in close proximity. The number of key climate stations was reduced in those areas where adequate spatial coverage could be maintained. The 27 key climate station names and associated data are summarized below in Table 1(sorted alphabetically). The locations of the key temperature and precipitation climate stations are shown in Figures 1 and 2, respectively. As depicted in the figure legend, the stations are color coded to indicate the percent missing data for each station from 1950 through 2003. The figure also labels each key climate station with its name, ID and percent missing. Task 53_2.doc 2 of 17