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.a......~.............................................................................................>>........................... <<...... Drier ...... ARK~SAS RIVER BASIN Streamflow Porecasts - May 1, 2004 Puture Conditions ....................................-........=....-............................................................................... Wetter .....>> I I .................... Chance Of Exceeding · ...................... I 50' (Most Probable) 30' 10' I 30-Yr Avg. I (1000AP) (% AVG.) I (1000AP) (1000AP) I (1000AP) ............................~=..=.........._........................ .......................1....==............................... 23 85 I 27 34 27 I I r I I I I I I I I I I Porecast Point Forecast Period 70' (1000AP) 90% (1000AP) Chalk Creek nr Nathrop APR-SEP 11.9 18.5 Arkansas River at SaUda APR-SEP 179 225 Grape Creek nr WestcUffe APR-SEP 8.8 17.0 Pueblo Reservoir Inflow APR-SEP 250 320 Huerfano River nr Redwing APR-SEP 10.4 13.2 Cucharas River nr La Veta APR-SEP 6.9 9.9 Trinidad Lake Inflow APR-SEP 26 37 260 340 310 84 295 22 112 35 19.6 27 365 410 480 430 85 15.0 97 16.7 19.7 15.5 12.0 92 14.1 17.1 13.0 45 53 64 44 102 ARKANSAS RIvER BASIN Reservoir Storage (1000 AP) - End of April .........................................................~....................-................~.................................. ARKANSAS RIVER BASIN Watershed Snowpack Analysis - May 1, 2004 I I .........-......................................................................................................................... Usable I *** Usable Storage *** I Reservoir Capacityl This Last I Watershed of ..............~.. I Year Year Avg I Data Sites Last Yr Average .J..................................................................a...I........._................~.............................. ADOBE 70.0 0.0 0.0 34.3 I UPPER ARKANSAS BASIN 6 86 81 I 6.0 I I 40.6 I I 4.7 I I 11.3 I I 123.7 I I 6.0 I 20.1 I I 163.5 I I 29.1 I I 70.8 I I 41.3 I I CLEAR CREEK 11.0 8.4 7.0 GREAT PLAINS 150.0 0.8 0.0 HOLBROOK 7.0 1.7 0.0 HORSE CREEK 28.0 0.0 0.0 JOHN MARTIN 335.7 12.4 41. 8 LAKE HENRY 6.4 6.1 8.0 MEREDITH 42.0 10.7 24.0 PUEBLO 236.7 103.7 113.5 TRINIDAD 72.3 25.4 19.6 TURQUOISE 126.6 29.9 64.2 TWIN LAKES 86.0 21.2 ..............................._...........-~..................................................................................... 37.1 NU1lIber This Year as % of CUCHARAS I'< HUERPANO RIVER 4 110 110 PURGATOIRE RIVER BASIN 2 215 120 TOTAL ARKANSAS RIVER BASI 11 101 92 The average is computed for the 1971-2000 base period. * 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.