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_.a_.==~.====_a=====~=====s==========_======_=~.====...=___..====_==.a=.=.=__._=__..==__D_=.___..~===~.=..=__=__a_==___==.....____ YAMPA, WHITE, AND NORTH PLATTE RIVER BASINS Streamflow Forecasts - May 1, 2003 Forecast Point -_......==..=--==-=-=..._._-===-=-=...._---..._==-_...=.a_..===_=.==..=.==....=======.==.=.=.=.*===~~....===a===_._.==___=_======. Forecast Period <<--.-=- Drier .==..- Future Conditions Wetter =====>> 90% (1000AF) 70% (1000AF) _..._.._..s.=====.=...=_=..=~======.=__.....=.=....==~==_._____====. ..._..=a._.==___==..__. _.=====.__..~.==_=..=..._=====..=...= 230 NORTH PLATTE RIVER nr Northgate MAY-SEP 139 LARAMIE RIVER nr Woods MAY-SEP 65 Yampa R abv Stagecoach Res APR-JUL 14.5 Yampa River at Steamboat Springs APR-JUL 220 Elk River nr Milner APR-JUL 182 Elkhead Creek nr Elkhead APR-JUL 21 ELKHEAD CREEK blw Maynard Gulch APR-JUL 33 Fortification Ck nr Fortification MAR -JUN 3,20 5.10 Yampa River nr Maybell APR-JUL 625 Little Snake River nr Slater APR-JUL 87 LITTLE SNAKE R nr Dixon APR-JUL 154 LITTLE SNAKE R nr Lily APR-JUL 175 White River nr Meeker APR-JUL 131 ._.._..a...=._=_===___.._...=====___.._._.._======....====....=..==......_===_.....=__...=.._==...=........==_.==g=.=cme_._....... I I ___.__......._.sa__.........=_...=....=...._===..=.___...===.......__....__...__.......____=_..__.....==.....__....a_.........._._ Usable I ... Usable Storage ... I Number This Year as % of Capacity I This Last I Watershed of ____=====_=_====_ I Year Year Avg I Data Sites Last Yr Average =-.............--==--...-.....===-=-=--....-=..=......=.----...====..-.-I===-.---...=-...-....=..====.s.-==-...___._m..________... 28.1 I I 7,4 I I I I I I I I I I I I I I YAMPA, WHITE, AND NORTH PLATTE RIVER BASINS Reservoir Storage (1000 AF) - End of April Reservoir STAGECOACH 33.3 30,0 28.2 YAMCOLO 9.1 4,9 6.7 175 92 21 240 221 26 43 740 109 215 240 156 Chance Of Exceeding · 50% (Most Probable) (1000AF) (% AVG,) 30% (1000AF) 10% (1000AF) 30-Yr Avg. (1000AF) 200 87 225 260 155 127 110 87 128 38 29 26 90 31 290 280 255 91 270 329 325 250 77 281 43 39 I I I I I I I I I I - I I I I I I 30 77 35 67 59 50 85 57 9.60 7.50 6.40 85 7.70 1010 990 820 83 900 173 159 126 79 144 365 330 260 79 305 395 365 285 78 330 233 290 175 60 197 YAMPA, WHITE, AND NORTH PLATTE RIVER -BASINS Watershed Snowpack Analysis - May 1, 2003 4 271 102 LARAMIE RIVER BASIN NORTH PLATTE RIVER BASIN TOTAL NORTH PLATTE BASIN ELK RIVER BASIN YAMPA RIVER BASIN WHITE RIVER BASIN TotAL YAMPA AND WHITE RIV LITTLE SNAKE RIVER BASIN 9 242 100 12 241 100 2 234 79 11 96 296 4 234 85 14 284 91 8 185 93 .c__.==_._=_._____..==c==_=======___===.__..=....=._____=....=.._____=_==_.....__.=...___..==_...===_=.............._=___........= 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,