B-120 Water Supply Forecast Summary (posted on 05/07/20 16:31)
Department of Water Resources
California Cooperative Snow Surveys
April-July Forecast Summary (in thousands of acre-feet): | ||||
---|---|---|---|---|
HYDROLOGIC REGION and Watershed | Apr-Jul Forecast | Percent of Average | 80% Probability Range | |
NORTH COAST | ||||
Trinity River at Lewiston Lake | 230 | 36% | 180 - | 280 |
Scott River near Fort Jones | 104 | 60% | ||
SACRAMENTO RIVER | ||||
Sacramento River above Shasta Lake | 120 | 41% | ||
McCloud River above Shasta Lake | 260 | 68% | ||
Pit River above Shasta Lake | 680 | 67% | ||
Total Inflow to Shasta Lake | 1,050 | 60% | 860 - | 1,210 |
Sacramento River above Bend Bridge | 1,480 | 61% | 1,230 - | 1,750 |
Feather River at Oroville | 940 | 55% | 780 - | 1,080 |
Yuba River near Smartsville | 600 | 62% | 480 - | 710 |
American River below Folsom Lake | 790 | 66% | 650 - | 950 |
SAN JOAQUIN RIVER | ||||
Cosumnes River at Michigan Bar | 95 | 76% | 80 - | 130 |
Mokelumne River Inflow to Pardee | 290 | 63% | 240 - | 350 |
Stanislaus River, below Goodwin Res. | 410 | 60% | 340 - | 500 |
Tuolumne River below La Grange | 630 | 53% | 560 - | 720 |
Merced River below Merced Falls | 290 | 47% | 240 - | 340 |
San Joaquin River inflow to Millerton Lk | 650 | 53% | 530 - | 760 |
TULARE LAKE | ||||
Kings River below Pine Flat Res. | 640 | 53% | 510 - | 760 |
Kaweah River below Terminus Res. | 145 | 51% | 120 - | 165 |
Tule River below Lake Success | 28 | 44% | 21 - | 36 |
Kern River inflow to Lake Isabella | 240 | 52% | 200 - | 280 |
NORTH LAHONTAN | ||||
Truckee River, Lake Tahoe to Farad accretions | 155 | 62% | ||
Lake Tahoe Rise, in feet | 0.8 | 60% | ||
West Carson River at Woodfords | 36 | 69% | ||
East Carson River near Gardnerville | 105 | 58% | ||
West Walker River below Little Walker | 75 | 49% | ||
East Walker River near Bridgeport | 21 | 34% | ||
Download in comma-delimited format |
Water-Year (WY) Forecast Summary and Monthly Distribution (in thousands of acre-feet): | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Watershed | Oct thru Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Water Year | 80% Probability Range | WY % Avg | |
Trinity, Lewiston | 155 | 48 | 47 | 120 | 75 | 27 | 8 | 2 | 0 | 483 | 430 - | 535 | 36% |
Inflow to Shasta | 1,286 | 298 | 290 | 384 | 285 | 205 | 176 | 165 | 156 | 3,245 | 2,995 - | 3,455 | 56% |
Sacramento, Bend | 1,783 | 446 | 430 | 547 | 410 | 288 | 235 | 200 | 206 | 4,545 | 4,225 - | 4,890 | 53% |
Feather, Oroville | 783 | 181 | 215 | 408 | 300 | 142 | 90 | 73 | 64 | 2,255 | 2,070 - | 2,430 | 51% |
Yuba, Smartsville | 301 | 75 | 109 | 309 | 215 | 60 | 16 | 9 | 10 | 1,105 | 975 - | 1,235 | 49% |
American, Folsom | 289 | 77 | 160 | 446 | 260 | 70 | 14 | 4 | 5 | 1,325 | 1,180 - | 1,495 | 50% |
Cosumnes, Mich. Bar | 34 | 9 | 35 | 69 | 18 | 6 | 2 | 1 | 0 | 175 | 155 - | 215 | 46% |
Mokelumne, Pardee | 56 | 19 | 39 | 122 | 127 | 36 | 5 | 1 | 1 | 406 | 355 - | 470 | 54% |
Stanislaus, Gdw. | 115 | 32 | 69 | 190 | 155 | 50 | 15 | 6 | 3 | 635 | 560 - | 730 | 55% |
Tuolumne, La Grange | 144 | 36 | 90 | 261 | 250 | 100 | 19 | 7 | 3 | 910 | 835 - | 1,005 | 48% |
Merced, McClure | 66 | 16 | 42 | 137 | 108 | 35 | 10 | 3 | 0 | 417 | 365 - | 470 | 42% |
San Joaquin, Millerton | 107 | 33 | 53 | 203 | 250 | 150 | 47 | 17 | 10 | 870 | 745 - | 990 | 49% |
Kings, Pine Flat | 125 | 34 | 54 | 191 | 260 | 150 | 39 | 14 | 9 | 875 | 740 - | 1,000 | 51% |
Kaweah, Terminus | 35 | 11 | 14 | 50 | 60 | 28 | 7 | 3 | 2 | 210 | 180 - | 235 | 47% |
Tule, Success | 19 | 5 | 7 | 15 | 10 | 2 | 1 | 0 | 0 | 59 | 50 - | 70 | 40% |
Kern, Isabella | 106 | 25 | 29 | 56 | 85 | 70 | 29 | 15 | 10 | 425 | 380 - | 470 | 58% |
Download in comma-delimited format |
Notes:
50 year averages are based on years 1966 to 2015.
Unimpaired runoff represents the natural water production of a river basin, unaltered by upstream 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: | ||
---|---|---|
Sean De Guzman | (916) 574-2208 | Sean.deGuzman@water.ca.gov |
John King | (916) 574-2637 | John.J.King@water.ca.gov |
Andy Reising | (916) 574-2181 | Andrew.Reising@water.ca.gov |
Ashok Bathulla | (916) 574-2634 | Ashok.Bathulla@water.ca.gov |
Lauren Miller | (916) 574-1433 | lauren.miller@water.ca.gov |