MONTHLY WATER SUPPLY OUTLOOK
NOAA National Weather Service
California Nevada River Forecast Center
200 PM PST Thursday May 7 2009

                                  May 1 2009  
                                                           
* NOTICE: WITH THE EXCEPTION OF THE UPPER KLAMATH LAKE BASIN...FORECASTS 
  ARE AS OF MAY 5 DUE TO SIGNIFICANT PRECIPITATION THAT  FELL THE FIRST 
  FEW DAYS IN MAY.  THE UPPER KLAMATH BASIN FORECASTS ARE AS OF MAY 1

COASTAL BASINS
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
Williamson River
  Sprague, blo                    May-Sep    220    82    270    168    267
Sprague River
  Chiloquin, nr                   May-Sep    115    74    160     70    155
Upper Klamath Falls River
  Inflow                          May-Sep    270    79    365    177    340
Lost River
  Gerber Reservoir Inflow         May-Jul    4.3    67   14.4   0.10    6.4
  Clear Lake Reservoir Inflow     May-Jul   12.5    65     29   1.00   19.3
Scott River
  Fort Jones, nr                  Apr-Jul    130    72    170    110    181
Trinity River
  Trinity Lake Inflow             Apr-Jul    500    79    640    430    635

SACRAMENTO RIVER ABOVE BEND BRIDGE
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
Pit River
  Montgomery Ck, nr               Apr-Jul    800    75   1070    630   1070
Mccloud River
  Shasta Lk, abv                  Apr-Jul    330    89    420    270    370
Sacramento River
  Delta                           Apr-Jul    240    83    315    195    290
  Shasta Dam                      Apr-Jul   1550    87   1960   1330   1790
  Bend Bridge, abv, Red Bluff, n  Apr-Jul   2050    84   2550   1750   2440


FEATHER RIVER ABOVE OROVILLE RESERVOIR
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
NF Feather River
  Prattville, nr                  Apr-Jul    250    75    330    200    333*
  Big Bar                         Apr-Jul    740    77    970    590    962*
Feather River
  Oroville                        Apr-Jul   1370    78   1780   1100   1760


YUBA RIVER ABOVE SMARTVILLE
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
North Yuba River
  Goodyears Bar, blo              Apr-Jul    235    86    290    195    273*
South Yuba River
  Langs Crossing                  Apr-Jul    195    87    240    160    225*
Yuba River
  Smartsville, nr                 Apr-Jul    890    89   1090    730    995

AMERICAN RIVER ABOVE FOLSOM RESERVOIR
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
MF American River
  Auburn, nr                      Apr-Jul    445    91    545    365    490*
Silver Ck
  Union Valley                    Apr-Jul     88    90    107     72     98*
  Camino Dam, blo                 Apr-Jul    142    90    172    117    158*
American River
  Folsom Reservoir Inflow         Apr-Jul   1120    91   1390    950   1230

SAN JOAQUIN BASIN
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
SF San Joaquin River
  Hooper Ck, blo, Florence Lk, n  Apr-Jul    165    86    200    120    192*
San Joaquin River
  Millerton Lk                    Apr-Jul   1020    80   1240    800   1270
Merced River
  Pohono Bridge, at, Yosemite, n  Apr-Jul    340    94    385    235    360*
  Merced Falls, blo               Apr-Jul    550    85    680    420    645
Tuolumne River
  Hetch Hetchy, nr                Apr-Jul    560    94    615    450    596*
  La Grange, nr                   Apr-Jul   1110    90   1280    940   1230
MF Stanislaus River
  Beardsley Dam, blo              Apr-Jul    300    94    370    240    320*
Stanislaus River
  New Melones Dam                 Apr-Jul    660    95    800    520    695
NF Mokelumne River
  West Point                      Apr-Jul    400    96    480    320    416*
Mokelumne River
  Pardee Reservoir                Apr-Jul    440    96    530    350    460
Cosumnes River
  Michigan Bar                    Apr-Jul     90    73    140     40    123

TULARE LAKE BASIN
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
Kern River
  Kernville, nr                   Apr-Jul    265    67    330    180    398*
  Isabella Dam, blo               Apr-Jul    300    62    400    210    480
  Bakersfield, nr                 Apr-Jul    310    63    410    215    490
Tule River
  Success Dam                     Apr-Jul     30    45     50     20     66
Kaweah River
  Terminus Dam                    Apr-Jul    220    76    270    170    290
NF Kings River
  Cliff Camp, nr                  Apr-Jul    205    85    245    160    240*
Kings River
  Pine Flat Dam, blo              Apr-Jul    980    78   1120    830   1250

EASTSIDE SIERRA - HUMBOLDT BASIN
                                  Period      MP   MP%   RMAX   RMIN    AVG
                                  ------    ----   ---   ----   ----    ---
Truckee River
  Lake Tahoe Stage Rise           Apr-High  0.85    62   1.16   0.54   1.38
Ltl Truckee River
  Stampede Dam                    Apr-Jul     60    75     75     48     80
Truckee River
  Farad                           Apr-Jul    195    75    230    159    260
EF Carson River
  Gardnerville, nr                Apr-Jul    155    82    180    132    189
WF Carson River
  Woodfords                       Apr-Jul     45    80     52     38     56
Carson River
  Carson City, nr                 Apr-Jul    125    66    152    100    188
  Fort Churchill, nr              Apr-Jul    115    65    142     87    178
East Walker River
  Bridgeport, nr                  Apr-Aug     48    72     65     31     67
West Walker River
  Ltl Walker, blo, Coleville, nr  Apr-Jul    115    74    135     95    156
NF Humboldt River
  Devils Gate, at, Halleck, nr    Apr-Jul     25    74     35   15.0     34*
SF Humboldt River
  Dixie Ck, abv, Elko, nr         Apr-Jul     60    79     95     25     76
Marys River
  Hot Springs, abv, Deeth, nr     Apr-Jul     30    77     40     20     39
Humboldt River
  Elko, nr                        Apr-Jul    105    68    157     53    154
  Palisade                        Apr-Jul    170    68    255     85    250
  Comus                           Apr-Jul    130    58    220     40    225
  Imlay, nr                       Apr-Jul     90    48    165   15.0    188
Martin Ck
  Paradise Vly, nr                Apr-Jul    9.0    48   16.0    2.0   18.7
			
			
* 30 Year Averages for 1971-2000 are incomplete.  Those forecast
points with an asterik have incomplete averages, so 1961-1990 averages
are listed.  The new averages will be incorporated into this product
when the complete data sets become available. 			

MP    Most probable volume in 1000 acre-feet.
MP%   Most probable volume in percent of the 71-00 average.
RMAX  Volume that has a 10 percent chance of being exceeded.
RMIN  Volume that has a 90 percent chance of being exceeded.
AVG   Average volume for the 71-00 period.

All forecast volumes reflect natural flow.  Actual observed flow may
be affected by upstream water management.

CNRFC/at/tm