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==a=e==============================================================-=======================================c====================== UPPER RIO GRANDE BASIN Streamflow Forecasts - April 1, 2003 Forecast Point =====:=======:============================================---===========-========================-=-==========...=====-_:========= Forecast Period Rio Grande Reservoir Inflow APR-JUL Rio Grande at Wagon Wheel Gap APR-SEP South Fork Rio Grande at South Fork APR-SEP Rio Grande nr Del Norte APR-SEP Saguache Creek nr Saguache APR-SEP Alamosa Creek abv Terrace Reservoir APR-SEP La Jara Creek nr Capulin MAR-JUL Trinchera Water Supply APR-SEP Platoro Reservoir Inflow APR-JUL APR-SEP Conejos River nr Mogote APR-SEP San Antonio River at Ortiz APR-SEP Lo~ Pinos River nr Ortiz APR-SEP CUlebra Creek at San Luis APR-SEP Costilla Reservoir inflow MAR- JUL Costilla Creek nr Costilla MAR -JUL ===~=~=======~=_m_.============.=====================a=================a..=====_===============...======_...g=====.____._._.==.... <<--_... Drier ....._ 16.9 1.34 13.4 6.9 17.0 UPPER RIO GRANDE BASIN Reservoir Storage (1000 AF) - End of March Wetter ==--=>> I I =-=-======_._.==---= Chance Of Exceeding * ._._a__=__._._====____ I 90'1< 70'1< 50'1< (Most Probable) 30'1< 10'1I (1000AF) (1000AF) I (1000AF) ('I< AVG.) , (1000AF) (1000AF) I (1000AF) -====.====--=-=-=-====-=====-====-==-===-=====-=--===-====.====a_===I=-===.=================f-.===~=._-=-====._.=_=a._.=__=__==_== Rio Grande at Thirty Mile Bridge APR-SEP 56 67 I 77 57 I 66 107 136 I I I 67 57 I I I I 190 55' I I I 75 57 I I I I I , I I I I , I I I I I I I I I I , I I I I I I I _.======-=---=-==-=._-==-=--========---==--=-.====._.==...=--=.-==-=--=-=_...=--==....==_..._======......===____._.a_.=_==._._==_= Usable I *** Usable Storage *** I Number This Year.as 'I< of CapaCity' This Last I Watershed of _______________== I Year Year Avg I Data Sites Last Yr Average ==_._._=_._==_.=s=._._..======__=_=_=_...._._._.=.____===._=._._====_=_.I_=_.=.===._.==_=_=_=_.=====~_____=====_________=_=._=__=_ CONTINENTAL 15.0 3.7 4.0 5.9 I ALAMOSA CREEK BASIN 2 161 40 I 24.5 I I 19.3 I I 24.9 I I 10.6 I I 7.6 I I Reservoir PLATORO 53.7 RIO GRANDE 51.0 SANCHEZ 103.0 SANTA MARIA 45.0 TERRACE 13 .1 ========-===================-================---====--=====-===._.=-==--====----======-==========--=========------==-==-====_._==- 6.0 19.0 12.5 10.8 2.7 Future Conditions 51 60 235 350 6.10 48 45 51 147 12.1 50 33 12.7 31 16.6 CONEJOS & RIO SAN ANTONIO 75 68 116 60 146 24.3 UPPER RIO GRANDE BASIN CULEBRA & TRINCHERA CREEK 300 345 39 60 TOTAL UPPER RIO GRANDE BA 90 III 132 123 220 265 54 445 531 6.4 17.0 23 70 29 36 33 26 35 50 42 53 70 2.50 4.30 49 6.80 6.70 20 32 40 100 60 40 27 31 35 39 40 45 63 63 53 59 64 71 77 107 127 64 177 200 5.7 8.1 10.0 61 15.5 16.4 25 36 43 56 61 74 21 27 117 41 23 9.3 11.0 104 15.1 10.6 23 27 104 37 26 UPPER RIO GRANDE BASIN Watershed Snowpack Analysis - April 1, 2003 13.8 7.7 4.0 4 196 77 5 295 134 12 159 56 23 200 76 * 90'1<, 70'1<. 30t, and 10'1< chances of exceeding' are the probabilities that the actual volume will exceed the volumes in the table. The average is computed for the 1971-2000 base period. (1) - The values listed under the 10'1< and 90'1< Chance of Exceeding are actually 5'1< and 95' exceedance levels. (2) - The value is natural volume - actual volume may be affected by upstream water management.