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t <br /> . <br /> RIO GRANDE BASIN March, 1998 <br /> J <br /> Basinwide Conditions Assessment: <br /> The SWSI value of-0.8 indicates that for February the R I O GRANDE BASIN <br /> )asin water supplies were near normal. The Natural 6 Step Water Supply Index History <br /> Resources Conservation Service reports March 1 snowpack as 4- <br /> 77% of normal. Flow at the gaging station Rio Grande near I. <br /> Del Norte averaged 220 cfs, as compared to the long term 3_ ..- <br /> average of 180 cfs. The Conejos River near Mogote had a -- - % 4.- . <br /> mean flow of 49 cfs. Flow across the New Mexico stateline 1 '- ' - - <br /> averaged 142% of normal. Storage in Platoro, Rio Grande, ° it;1Mci-, '� 4tand Santa Maria reservoirs totaled 94% of normal as of the _ <br /> end of February. _ == r: IF <br /> Alamosa received only 0.03 inches of precipitation o _2 <br /> during February, 0.26 inches below normal. The high -3- j <br /> temperature was 50°in Alamosa,the low-2 , and the average 4 - --- N-1 J <br /> 1- <br /> JAN60 JAN90 JA/ AN92 JAN93 JAN94 JAN95 JAN9C JANG7 JAN96 <br /> 24.2°, 1.8° above normal. YEIR,MOM'H <br /> Outlook <br /> El Nino has still not brought the precipitation <br /> expected for the San Luis Valley. However, with the two <br /> snowiest months yet to come,there is still hope the snowpack RIO GRANDE NR. DELNORTE <br /> can approach average levels. 170 FLOW versa YEAR <br /> Stream flow forecasts are calling for below average 160 <br /> runoff this year. Carry over storage in the basin reservoirs ,o <br /> cannot counteract the effects of low runoff for most water i 13D <br /> users and those activities dependent on higher flows. '20 <br /> in 110 <br /> o 100 <br /> Administrative/Management Concerns .g 80 . . <br /> The annual meeting of the Rio Grande Compact ' 3` so <br /> 7D <br /> Commission will begin at 9:00 a.m.on March 26, 1998,in the SD ;�---"' <br /> Leon Memorial Building on the campus of Adams State 5° e <br /> College in Alamosa. Colorado hosts the event once every 301 ` --. '- <br /> three years. The public is invited to attend. 20 <br /> Oct Nbv Dec Jan Feb Horeb <br /> SOUTH <br /> Public Use Impacts ET ow) O DRY(1977) 0 % 169E <br /> Winter sports enthusiasts reliant on snow cover suffered <br /> through another sub-par month. Due to the dry conditions it <br /> is expected that irrigators will prepare fields and ditches for <br /> an early run of water. Representative Reservoirs <br /> Rio Grange aassn <br /> 30 <br /> 26- <br /> 24-i <br /> 22- <br /> • <br /> , 20- <br /> : <br /> :IQ 16 <br /> 13.2 14 <br /> IC: 12 <br /> i <br /> 6 <br /> • <br /> \4 <br /> RIO Grande PlatOro SantaMeria <br /> ® Avg. 2/26 Contents ® 2/26/96 Contents <br /> 5 <br />