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Figure 3. Map of Water Division 3 (Rio Grande River) and subsequent division boundaries. <br />A - December to March Precipitation (single season) <br />District 26 <br />In the northern portions of the basin, District 26 there is only one precipitation <br />station (Saguache) therefore the user is cautioned as to the level of which this stations <br />exhibits actual conditions in the basin as a whole. This is a basin where the HCI values <br />did not reveal any striking relationships with regards to precipitation. <br />The most notable relationship, worth mentioning was with the SOI (an ENSO <br />index) which shows some connection with drier periods with El Nino measured in the <br />summer and early fall but, this degrades as winter and approaches. Overall, there is little <br />significant value presented in this area for this season. <br />District 20 <br />In summary, the key ‘wintertime’ precipitation in the basin has quite a bit of <br />variability that appears to be influenced by Atlantic Ocean-based HCI variables. In <br />District 20, the preliminary results show that HCI’s are influenced (in a leading mode) by <br />the North Atlantic Oscillation (NAO) and the Atlantic Multi-Decadal Oscillation (AMO). <br />Figure4, <br />An example of this relationship can be seen in which shows the relationship of <br />the September to November NAO value. <br />9 <br />