B120.200804 (04/08/08 1312)
Department of Water Resources
California Cooperative Snow Surveys
Apr 1, 2008 FORECAST
OF UNIMPAIRED RUNOFF
(in thousands of acre-feet)
April-July Forecast
April Percent 80%
thru of Probability
July Average Range
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NORTH COAST
Trinity River at Lewiston Lake 650 99%
Scott River near Fort Jones 185 93%
SACRAMENTO RIVER
Sacramento River above Shasta Lake 270 90%
McCloud River above Shasta Lake 360 92%
Pit River above Shasta Lake 890 83%
Total inflow to Shasta Lake 1560 86% 1210 - 2360
Sacramento River above Bend Bridge 2120 85% 1600 - 3290
Feather River at Oroville 1360 76% 980 - 2210
Yuba River at Smartville 810 81% 540 - 1210
American River below Folsom Lake 940 76% 660 - 1590
SAN JOAQUIN RIVER
Cosumnes River at Michigan Bar 85 68% 40 - 205
Mokelumne River inflow to Pardee 370 80% 290 - 520
Stanislaus River below Goodwin Res. 590 84% 450 - 840
Tuolumne River below La Grange 1010 83% 840 - 1400
Merced River below Merced Falls 490 78% 390 - 730
San Joaquin River inflow to Millerton Lk 1040 83% 830 - 1380
TULARE LAKE
Kings River below Pine Flat Res. 1100 90% 920 - 1400
Kaweah River below Terminus Res. 260 91% 210 - 380
Tule River below Lake Success 46 72% 32 - 96
Kern River inflow to Lake Isabella 380 82% 300 - 500
NORTH LAHONTAN
Truckee River,Tahoe to Farad accretions 190 73%
Lake Tahoe Rise, in feet 1.0 72%
West Carson River at Woodfords 40 74%
East Carson River near Gardnerville 135 72%
West Walker River below Little Walker 120 78%
East Walker River near Bridgeport 45 70%
Water-Year Forecast and Monthly Distribution
Oct Aug Water 80%
thru Feb Mar Apr May Jun Jul & Year Probability
Jan Sep Range
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Inflow to Shasta 1335 610 525 600 450 290 220 405 4435 4020 - 5325
Sacramento, Bend 2010 1005 700 810 620 400 290 520 6355 5705 - 7655
Feather, Oroville 500 240 360 570 450 220 120 170 2630 2200 - 3590
Yuba, Smartville 225 140 180 310 340 130 30 35 1390 1105 - 1810
American, Folsom 205 140 185 360 380 165 35 20 1490 1195 - 2160
Cosumnes, Mich.Bar 30 27 22 43 30 10 2 1 165 115 - 290
Mokelumne, Pardee 25 30 50 110 165 85 10 3 478 390 - 630
Stanislaus, Gdw. 75 55 75 180 245 135 30 15 810 660 - 1080
Tuolumne, LaGrange 110 100 125 250 400 300 60 20 1365 1180 - 1770
Merced, McClure 55 65 50 125 210 130 25 9 669 570 - 930
San Joaquin, Mil. 95 70 105 210 400 320 110 45 1355 1130 - 1720
Kings, Pine Flat 85 75 100 210 430 350 110 50 1410 1220 - 1730
Kaweah, Terminus 31 31 39 65 100 75 20 8 369 310 - 500
Tule, Success 16 18 16 19 18 7 2 1 97 80 - 150
Kern, Isabella 55 35 55 80 135 115 50 35 560 470 - 700
Notes:
50 year averages are based on years 1956 to 2005.
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.
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% exceedence level value
and the 10% exceedence 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 at (916) 574-2637 kingjj@water.ca.gov
Steve Nemeth at (916) 574-2224 nemeth@water.ca.gov
Dave Rizzardo at (916) 574-2983 daver@water.ca.gov
Andy Reising at (916) 574-2181 areising@water.ca.gov
Adam Schneider at (916) 574-2208 aschneid@water.ca.gov
