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2) The Atlantic index value is not trivial when considering the moderate winter -time seasonal precipitation factors in the region. Figure 5. Relationship of the Sept. - Nov.PDO vs. District 35 Dec. -Mar. Basin Avg. Precip. (% of normal) Sep -Nov PDO vs. Dec -Mar Precip for District 35 Stations (% of normal precipitation) 240% MEI SOI Nino 3.4 NAO AMO District 26 X District 20 X Be- X District 35 c X o ♦ a a ♦ a a m ♦ t _ y ♦ i ♦ -3.50 -3.00 -2.50 -2.00 -1.50 -1.00 -0.50 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 Sep. Hov. Pacific Decadal Ocillation (PDO) value Table 1. Summary of single season Dec. -Mar. Precipitation/HCI Relationships for the Rio Grande basin (dark `X' indicates a relatively strong relationship and light 'X' indicates a relatively weak relationship). B - April -June Precipitation (single season) As the seasons migrate towards the springtime, one eye of an interested stake holder in precipitation is looking at seasonal projections for snowpack/runoff another concern might be along the lines of "what help /hindrance might spring hold "? This can be in 1) assistance to the outright runoff of surface water and 2) the potential for direct precipitation to help early crop growth. 11 PDO MEI SOI Nino 3.4 NAO AMO District 26 X District 20 X X X District 35 X X X B - April -June Precipitation (single season) As the seasons migrate towards the springtime, one eye of an interested stake holder in precipitation is looking at seasonal projections for snowpack/runoff another concern might be along the lines of "what help /hindrance might spring hold "? This can be in 1) assistance to the outright runoff of surface water and 2) the potential for direct precipitation to help early crop growth. 11