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i <br /> 1 + <br /> SOUTH PLATTE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of+1.2 indicates that for May the basin SOUTH PLATTE RIVER BASIN <br /> water supplies were above normal. Reservoir storage, the key Sur'"°Water Sypply °�"History <br /> S <br /> component in this basin in computing the SWSI value, was 102% 4_ <br /> of normal on May 31. Storage in the major plains reservoirs, W 3 ; . 4 ' <br /> Julesburg, North Sterling,and Prewitt, decreased by 10,378 acre- <br /> 2 A L <br /> feet during May and are at 88% of capacity. Storage in the major E <br /> upper basin reservoirs, Cheesman, Eleven Mile, Spinney, and 1 ■ ;d <br /> Antero, decreased by 2,654 acre-feet and are at 81% of capacity. gnr- P <br /> fh, '- <br /> The Soil Conservation Service reports May 31 snowpack at 106% _ <br /> of normal. The National Weather Service reports May <br /> _2_ <br /> precipitation as 60% of normal. The mean daily flow at the <br /> Kersey gage on the South Platte River was 485 cfs, as compared 3- <br /> to the 1961-1991 May average of 2,379 cfs. Flow at the -4 1 <br /> JAN84 JAN85 JAN86 JAN87 JAN88 JAN89 JAN90 JAN91 JAN92 JAN93 <br /> Colorado/Nebraska stateline averaged 156 cfs for the month. MONTH/YEAR <br /> SOUTH PLATTE RIVER NR. KERSEY <br /> FLOW BY WATER YEAR <br /> 2 8 <br /> 2-6 -47 <br /> 2-4 <br /> 2 2 <br /> M <br /> 2 2 <br /> • 1 0 <br /> <i 1 6 <br /> O <br /> 0_ 1.4 <br /> u <br /> �uiy 1 2 <br /> 5 ' <br /> 06 <br /> °4 <br /> • <br /> 0.2 <br /> 0 1 <br /> Oct Nov Dec Jan Feb March Apr11 May Juno July Aug Sept <br /> MONTH <br /> 17 WET(1983) O DRY(1964) a AVG X 1993 <br /> REPRESENTATIVE RESERVOIRS <br /> 9)UTH PLATTE RIVER BASIN <br /> 240 <br /> 220 <br /> 200 /\ <br /> 160 <br /> 120 <br /> 100 /^,�,\\ <br /> a8O J/ \ <br /> ■ <br /> 60 % <br /> 40 <br /> Dillon Hors■tooth Eleven Mile Cheesman Jackson Barr LOke <br /> ® Avg. S/31 Contorts 1`Q 5/31/93 COntente <br /> 3 <br />