B120UP (06/12/08 1326)
DEPARTMENT OF WATER RESOURCES
California Cooperative Snow Surveys
WATER SUPPLY FORECAST UPDATE
2008 April-July Unimpaired Runoff (1,000 Acre-feet)
Jun 3 %Avg Jun 10 %Avg
--------------------------------------------------------------------------------
Shasta Lake, total inflow average = 1819
90% Exceedence 1130 62% 1140 63%
50% Exceedence 1200 66% 1200 66%
10% Exceedence 1380 76% 1360 75%
Feather River at Oroville average = 1782
90% Exceedence 950 53% 960 54%
50% Exceedence 1040 58% 1040 58%
10% Exceedence 1180 66% 1160 65%
Yuba River near Smartville average = 1006
90% Exceedence 580 58% 590 59%
50% Exceedence 640 64% 640 64%
10% Exceedence 730 73% 720 72%
American River, below Folsom Lake average = 1240
90% Exceedence 650 52% 650 52%
50% Exceedence 730 59% 720 58%
10% Exceedence 840 68% 820 66%
Mokelumne River, inflow to Pardee Reservoir average = 461
90% Exceedence 240 52% 260 56%
50% Exceedence 270 59% 280 61%
10% Exceedence 310 67% 310 67%
Stanislaus River, below Goodwin Res. (blw New Melones) average = 702
90% Exceedence 400 57% 410 58%
50% Exceedence 450 64% 450 64%
10% Exceedence 510 73% 500 71%
Tuolumne River, below La Grange Res. (blw Don Pedro) average = 1220
90% Exceedence 710 58% 710 58%
50% Exceedence 810 66% 810 66%
10% Exceedence 910 75% 910 75%
Merced River, below Merced Falls (below Lake McClure) average = 632
90% Exceedence 360 57% 370 59%
50% Exceedence 400 63% 400 63%
10% Exceedence 460 73% 450 71%
San Joaquin River, below Millerton Lake average = 1254
90% Exceedence 740 59% 750 60%
50% Exceedence 860 69% 860 69%
10% Exceedence 980 78% 970 77%
Kings River, below Pine Flat Reservoir average = 1224
90% Exceedence 840 69% 850 69%
50% Exceedence 950 78% 950 78%
10% Exceedence 1060 87% 1050 86%
Kaweah River, below Terminus Reservoir average = 286
90% Exceedence 190 66% 190 66%
50% Exceedence 220 77% 220 77%
10% Exceedence 250 87% 250 87%
Tule River, below Lake Success average = 64
90% Exceedence 26 41% 27 43%
50% Exceedence 31 49% 30 47%
10% Exceedence 38 60% 35 55%
Kern River, inflow to Isabella Lake average = 461
90% Exceedence 280 61% 280 61%
50% Exceedence 320 69% 320 69%
10% Exceedence 360 78% 360 78%
Questions regarding this forecast:
John King: (916) 574-2637 (e-mail kingjj@water.ca.gov)
Steve Nemeth: (916) 574-2224 (e-mail nemeth@water.ca.gov)
Dave Rizzardo: (916) 574-2983 (e-mail daver@water.ca.gov)
Andy Reising at (916) 574-2181 (e-mail areising@water.ca.gov)
Adam Schneider at (916) 574-2208 (e-mail aschneid@water.ca.gov)
Runoff forecasts are unimpaired (full natural) flows which represent the
natural water production of the river basin, unaltered by upstream diversions,
storage, or export or import of water to or from other watersheds.
The median (50%) forecast assumes median conditions after the date of forecast.
Runoff exceedence levels are derived from historical data.
The 90 percent exceedence level and the 10 percent exceedence level together
comprise a range about the median forecast in which the actual runoff should
fall 8 times out of 10.
Forecasts are stated in 1,000's of acre-feet and percent of (50-year) average.
The averages are for the period 1956 to 2005.
