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_=====.=~====_~._..=..=====..=.=_==a.._=.====.======...==.===..~=_=.m====.===.__.==.===__==.._=_====_====.____========_=======._== <<_..... Drier -.-.=_ ARKANSAS RIVER BASIN Streamflow Forecasts - May 1, 2003 Future Conditions __._a==CD==_=_=_.=_==__=_==_==...._==_==._._===.......==.....a....=__==_===.......__===....=======_=_.......=._.=============_=__= Wetter .~.==>> I I ----==---------=---- Chance Of Exceeding * _=.====~=____._a=_=_._ I 90% 70% 50% (Most Probable) 30% 10% I 30-Yr Avg. I (1000AF) (1000AF) I (1000AF) (% AVG.) I (1000AF) (1000AF) I (1000AF) ===._--========-==_.====-====-=-=====-=.~.._===--_._.==._----_..====1.===--====._....=--=...1========--=_._.--========--=-=...-=== Chalk Creek nr Nathrop APR-SEP 10.9 17.5 I 22 82 I 26 33 27 I I I I I I I I I I I I I I Forecast Point Forecast Period Arkansas River at Salida APR-SEP 194 240 Grape Creek nr Westcliffe APR-SEP 4.1 11.9 Pueblo Reservoir Inflow APR-SEP 250 320 Huerfano River nr Redwing AFR-SEP 9.2 12.0 Cucharas River nr La Veta APR-SEP 5.3 8.3 Trinidad Lake Inflow APR-SEP 19.0 30 -=-===============-=====-=.-==========-=.=========-===.=.==========._=======~~~=.===___.========a==========~=__===_======a======== ARKANSAS RIVER BASIN Watershed Snowpack Analysis - May 1, 2003 I I __========a=z_============_=_==_=__=========._.======:==m===.=.====..~_==========.====================.======_=======__===_======= Usable I *** Usable Storage *** I' Number This Year as % of Capacity I This Last -, I Watershed of D________D===D__= I Year Year Avg I Data Sites Last Yr Average a_____=._.=__==_==.__===____==__====..___._=__._.=_._._=._=..~.=====_._=I=======.._==__=======~======_============_===_.=======._. 34.3 I I ARKANSAS RIVER BASIN Reservoir Storage (1000 AF) - End of April Reservoir ADOBE 70,0 0.0 27.1 275 89 310 355 310 17.3 88 23 31 19.6 365 85 410 480 430 13,8 89 15.6 18.4 15.5 10,4 80 12,5 15.5 13,0 38 86 46 57 44 UPPER ARKANSAS BASIN 3 295 99 CLEAR CREEK 11,0 7.0 6.4 6.0 CUCHARAS & HUERFANO RIVER 4 671 100 GREAT PLAINS 150.0 0.8 21.8 40.6 PURGATOIRE RIVER BASIN 2 0 56 HOLBROOK 7.0 1.7 5,8 4.7 TOTAL ARKANSAS RIVER BASI 8 419 99 HORSE CREEK 28.0 0,0 0,0 11.3 JOHN MARTIN 335.7 41.8 78.7 123.7 LAKE HENRY 8.0 6.1 5.9 6.0 MEREDITH 42.0 10.7 18.5 20.1 PUEBLO 236.7 103.7 135.9 163.5 TRINIDAD 72.3 19.6 18.1 29.1 TURQUOISE 126.6 29.9 57.0 70,8 TWIN LAKES 86.0 21.2 44.4 41.3 The average is computed for the 1971-2000 base period. m._=====~=_=======_=~.=~_==a====a.=..__.==D.C..__=.._.__......__.........................._._.===__..__:..........c=.=..........== * 90%, 70%. 30%, and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table. (1) - The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels. (2) - The value is natural volume - actual volume may be affected by upstream water management.