B120 (04/08/14 1132)

Department of Water Resources California Cooperative Snow Surveys April 1, 2014 FORECAST OF UNIMPAIRED RUNOFF (in thousands of acre-feet) April-July Forecast April Percent 80% thru of Probability July Average Range -------------------------------------------------------------------------------- NORTH COAST Trinity River at Lewiston Lake 150 23% 65 - 310 Scott River near Fort Jones 52 31% SACRAMENTO RIVER Sacramento River above Shasta Lake 100 33% McCloud River above Shasta Lake 220 56% Pit River above Shasta Lake 610 58% Total inflow to Shasta Lake 970 54% 700 - 1630 Sacramento River above Bend Bridge 1270 51% 970 - 2120 Feather River at Oroville 640 36% 430 - 1240 Yuba River at Smartsville 380 38% 210 - 670 American River below Folsom Lake 480 39% 280 - 1010 SAN JOAQUIN RIVER Cosumnes River at Michigan Bar 40 31% 10 - 100 Mokelumne River inflow to Pardee 220 48% 140 - 370 Stanislaus River below Goodwin Res. 290 41% 170 - 530 Tuolumne River below La Grange 550 45% 380 - 920 Merced River below Merced Falls 185 29% 130 - 420 San Joaquin River inflow to Millerton Lk 400 32% 280 - 740 TULARE LAKE Kings River below Pine Flat Res. 410 33% 300 - 710 Kaweah River below Terminus Res. 70 24% 50 - 160 Tule River below Lake Success 8 13% 2 - 40 Kern River inflow to Lake Isabella 100 22% 70 - 200 NORTH LAHONTAN Truckee River,Tahoe to Farad accretions 59 23% Lake Tahoe Rise, in feet 0.5 36% West Carson River at Woodfords 23 43% East Carson River near Gardnerville 90 48% West Walker River below Little Walker 65 42% East Walker River near Bridgeport 13 21% Water-Year (WY) Forecast and Monthly Distribution Oct Water 80% WY thru Feb Mar Apr May Jun Jul Aug Sep Year Probability % Jan Range Avg -------------------------------------------------------------------------------- Trinity, Lewiston 38 49 154 69 59 17 5 3 1 395 305 - 560 29 Inflow to Shasta 697 284 588 325 270 205 170 165 156 2860 2525 - 3615 48 Sacramento, Bend 922 419 877 440 350 260 220 190 187 3865 3505 - 4970 44 Feather, Oroville 308 258 462 270 180 110 80 66 56 1790 1540 - 2455 40 Yuba, Smartville 91 188 245 180 145 40 15 8 8 920 740 - 1225 40 American, Folsom 48 237 232 225 200 50 5 1 2 1000 795 - 1550 37 Cosumnes, Mich.Bar 7 20 28 24 11 4 1 0 0 95 65 - 158 25 Mokelumne, Pardee 9 33 47 80 110 26 4 1 0 310 230 - 470 41 Stanislaus, Gdw. 25 36 62 110 130 42 8 2 0 415 295 - 670 36 Tuolumne, LaGrange 20 52 94 175 250 105 20 7 2 725 550 - 1130 37 Merced, McClure 10 13 33 70 90 20 5 0 0 241 186 - 490 24 San Joaquin, Mil. 45 23 46 115 180 80 25 11 5 530 405 - 900 29 Kings, Pine Flat 39 20 45 120 190 75 25 13 8 535 410 - 850 31 Kaweah, Terminus 8 6 12 25 33 9 3 1 1 98 77 - 195 21 Tule, Success 3 2 3 4 3 1 0 0 0 16 10 - 50 11 Kern, Isabella 37 11 17 28 40 22 10 8 7 180 145 - 285 25 Notes: 50 year averages are based on years 1961 to 2010. Unimpaired runoff represents the natural water production of a river basin, unaltered by upsteam diversions, storage, or by export or import of water to or from other watersheds. Groundwater changes due to human activity or not considered. Forecasted runoff assumes median conditions subsequent to the date of forecast. Runoff probability ranges are statistically derived from historical data. The 80% probability range is comprised of the 90% exceedance level value and the 10% exceedance level value. The actual runoff should fall within the stated limits eight times out of ten. Forecast point names are based on USGS gage names. For more information please contact: John King (916) 574-2637 John.J.King@water.ca.gov Steve Nemeth (916) 574-2634 Stephen.Nemeth@water.ca.gov Dave Rizzardo (916) 574-2983 David.Rizzardo@water.ca.gov Andy Reising (916) 574-2181 Andrew.Reising@water.ca.gov Sean de Guzman (916) 574-2208 Sean.deGuzman@water.ca.gov