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<br />- 2 - <br /> <br />NRCS Snow Survev Presentation (Chris Pacheco) <br />S k <br /> <br />nowoac <br />NRCS Snow Survey - Snow Water Equivalent (SWE) By Basins <br /> Based on data from May 5, 2005 <br />River Basin Current as a Current as a Current as a Average <br /> 0/0 of average % oflast % of the peak date <br /> year averal!e peak <br />Yampa/White 76% 173% 67% April 13th <br />North Platte 82% 140% 79% April 26th <br />Upper Colorado 97% 188% 86% April14lli <br />South Platte 93% 126% 87% April 23'" <br />Gunnison 136% 192% 113% April 12th <br />San Miguel, 142% 169% 115% April 7lli <br />Dolores, Animas <br />& San Juan <br />Upper Rio 151% 158% 124% April 10th <br />Grande <br />Arkansas 143% 158% 119% April13lli <br />Totals statewide 106% 167% 92% April12lli <br /> <br />. January was a banner month for snowfall in most of the <br />river basins but especially in the southern part of the state. <br />. Colorado has not been seen above average snowpack <br />(statewide) since 1997. <br />. When looking at snowmelt hydrographs by basin and for <br />the state as whole this year, (see black line in graph below), <br />a double hump is noticeable from the storms that came <br />through the state in late April. This gave a chance for some <br />snow to melt out but then again added back to the <br />snowpack. This will help moderate the run snow melt run <br />out, getting us close to average and possibly delaying the <br /> <br />Colorad-O statewide Snowpack <br />&lTl!don~SHOJn dittiI_ 01""05, ~_5 <br /> <br />25 <br /> <br />CVI<?ffl is Pet uf .A:.y: 103% <br />CIJfl€rl1 ilS Pet uflast Year 107". <br />Cl..itfOO11lS Pet (If Pe*: 9.2'lt1 <br />A.....rase;ls Pel mP",ak: ffi% <br />Prt (leAly t~E<P.decll(1 RfHICN PBOIk CUlIEIJIl <br />AI _Dilt"'l>..Al.otPastPeakn~e I <br />h'ef3,.€ Pea~ Date: I<;Jr 12 <br /> <br />~NRts <br /> <br />~ <br />~15 <br /> <br /> <br />NatJrdl~o.c_nrl <br />(01"-y'_,.~~ial !.-;('\x~ <br /> <br />. <br />! <br /> <br />~ <br />>:'" <br />j <br /> <br />o <br />MOl ~Dl ~m J~Dl F~Ol M~Ot ~D' ~Ol ~O, ~Dl ~O, ~O, <br />l-A"'-":;jgi! -W'f'X'm. -Wi2003 -'NYX\J4 -'hYlffi51 <br /> <br /> <br />. <br />Statewide: 99% of Average <br />146% of Last Year <br /> <br />Snowpack <br />Apri/1, 2005 <br /> <br /> <br />~. <br />Statewide: 107% of Average <br />167% of Last Year <br /> <br />Colorado SNOTEL Snowpack Update Map <br /> <br />P9f(:MI or A....er.age <br />_~I" <br />D".'~ <br />o no. 13 <br />DW'lllt <br />01.," <br />l':':i!]...u <br />_.~ <br /> <br />~NRCS <br /> <br />tlalL'lalRpIOUfr!M <br />(ons.cr.-~,ion :5.tMoc(, <br /> <br />Leger,j <br />.)I~O"JIIOrA~ra!T- <br />tJ 130.'50'4c(Aver30~e <br />Dll0.1:n')',.cfAVl'T"JL" <br />.'JO.IO~'J,OrA"'erage <br />D1I).~'IoO'lA'>'.:r"JC' <br />. ~O.&'3~rflA>'tra~C" <br />.C~~01,r"Vl"l'<lUL" <br />DNUSUIVt)'tCl <br />~ MilI(.1' 8a~ln tlalJ!llj~ry <br />'\ W<tCrstleCl BOVtd<Yr <br /> <br />~NRCS <br /> <br />Niltur~1 Resources <br />((Jn~r"rvalion S€rvice <br /> <br />Legend <br />.~150%OfAVerage <br />[:J 130-150% of Average <br />D110-129%OfAVerage <br />I::l 90 - 109% of Average <br />D70-S9%OfAVerage <br />.50-69%OfAVerage <br />. < 50% of Average <br />DNotsurveyed <br />~MajorBasinBoundary <br />'\WatershedBOUndary <br /> <br />~NRCS <br /> <br /> <br />Current as of May 05. 2005 <br /> <br />peak run off date in some basins by one to two weeks. <br />. The snowpack in the Arkansas Basin is concentrated in the southern part ofthe basin. <br />. In the Upper Rio Grande basin 45% of their snow came in January. <br />. The San Miguel, Dolores, Animas Basins really benefited from January storms receiving 54% of the <br />snowpack. <br /> <br />Flood Protection . Water Project Planning and Finance. Stream and Lake Protection <br />Water Supply Protection. Conservation Planning <br />