Extended Streamflow Prediction
Issued by NWS Missouri Basin, Pleasant Hill

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FGUS63 KKRF 141352
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MISSOURI  BASIN RIVER  FORECAST  CENTER WATER  SUPPLY  STATEMENT
ISSUED IN COOPERATION WITH NATURAL RESOURCES CONSERVATION SERVICE
ISSUED:  APRIL 14, 2016


UPPER MISSOURI BASIN

THE HIGH ELEVATION SNOW PACK IN THE UPPER MISSOURI BASIN AS OF APRIL
1 WAS NEAR TO BELOW AVERAGE.  THE SNOW PACK ABOVE TOSTON,  MONTANA
WAS 103 PERCENT OF AVERAGE.  THE SNOW PACK BETWEEN TOSTON AND FORT
PECK, MONTANA WAS 89 PERCENT.  THE SNOW PACK IN THE ST MARY AND MILK
RIVER BASINS WAS 70 PERCENT.

MARCH PRECIPITATION ACROSS THE UPPER MISSOURI BASIN RANGED FROM
BELOW TO ABOVE AVERAGE.  BASIN PRECIPITATION SUMMARIES FOR THE
MISSOURI BASIN INCLUDE: MILK ST. MARY, 113 PERCENT; MILK CANADA, 59
PERCENT;  LOWER MILK, 51 PERCENT; ABOVE TOSTON, 115 PERCENT; TOSTON
TO FT. PECK, 79 PERCENT.

STREAM FLOW IN THE UPPER MISSOURI BASIN IS FORECAST TO BE NEAR
AVERAGE DURING THE UPCOMING SPRING AND SUMMER.  THE ST. MARY RIVER
IS FORECAST TO HAVE 95 PERCENT OF AVERAGE APRIL-SEPTEMBER FLOWS.
RUNOFF IS EXPECTED TO RANGE AROUND 90 PERCENT OF AVERAGE FOR THE
MISSOURI BASIN ABOVE FORT PECK, MONTANA.

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA:  LIMA RESERVOIR
HAD 74 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 84 PERCENT
OF AVERAGE WATER, GIBSON RESERVOIR HAD 75 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 109 PERCENT OF AVERAGE STORED WATER.
THE  MAJOR  HYDROELECTRIC  RESERVOIRS  IN  MONTANA (CANYON  FERRY
AND FORT PECK) HAD MONTHEND STORAGE IN THE NEAR AVERAGE RANGE; 101
AND 115 PERCENT OF AVERAGE WATER, RESPECTIVELY.

YELLOWSTONE BASIN

THE HIGH ELEVATION SNOW PACK IN THE YELLOWSTONE BASIN WAS NEAR
AVERAGE ON APRIL 1.  THE SNOW PACK IN THE UPPER YELLOWSTONE BASIN
WAS 93 PERCENT OF AVERAGE OVERALL.  THE SNOW PACKS IN THE WIND,
BIGHORN, AND SHOSHONE BASINS WERE 108, 89, AND 95 PERCENT OF
AVERAGE, RESPECTIVELY.  THE SNOW PACKS IN THE TONGUE AND POWDER
BASINS WERE 73 AND 92 PERCENT OF AVERAGE, RESPECTIVELY.

PRECIPITATION IN THE YELLOWSTONE BASIN DURING MARCH WAS NEAR TO
ABOVE AVERAGE.  THE UPPER YELLOWSTONE RIVER BASIN RECEIVED 126
PERCENT OF AVERAGE PRECIPITATION WHILE THE LOWER YELLOWSTONE BASIN
REPORTED 82 PERCENT OF AVERAGE.  THE BIGHORN BASIN RECEIVED 155
PERCENT OF AVERAGE PRECIPITATION WHILE THE WIND RIVER BASIN RECEIVED
272 PERCENT OF AVERAGE. THE LITTLE BIGHORN - UPPER TONGUE BASIN
RECEIVED 140 PERCENT OF AVERAGE AND THE POWDER RIVER HAD 108 PERCENT
OF AVERAGE PRECIPITATION.

FORECAST STREAM FLOW IN THE YELLOWSTONE BASIN IS NEAR TO BELOW
AVERAGE FOR THE UPCOMING SPRING AND SUMMER.  STREAM FLOW FOR THE
WIND-BIGHORN BASIN ABOVE ST. XAVIER, MONTANA IS FORECAST TO BE ABOUT
104 PERCENT OF AVERAGE.  FLOW IN THE TONGUE BASIN IS EXPECTED TO BE
ABOUT 65 PERCENT OF AVERAGE.  FLOWS IN THE POWDER RIVER ARE EXPECTED
TO BE ABOUT 77 PERCENT OF AVERAGE.

MONTHEND STORAGE AT BOYSEN RESERVOIR WAS 112 PERCENT OF AVERAGE.
STORED WATER IN BUFFALO BILL RESERVOIR WAS 124 PERCENT OF AVERAGE.
MONTHEND STORAGE WAS 103 PERCENT OF AVERAGE AT BIGHORN RESERVOIR.

PLATTE BASIN

THE HIGH ELEVATION  SNOW PACK IN THE UPPER NORTH PLATTE BASIN WAS
102 PERCENT OF AVERAGE ON APRIL 1.  THE SNOW PACK IN THE NORTH
PLATTE  BASIN BELOW SEMINOE RESERVOIR WAS 107 PERCENT OF AVERAGE.
THE SNOW PACK IN THE SOUTH PLATTE BASIN WAS 114 PERCENT OF AVERAGE.

MARCH PRECIPITATION ACROSS THE PLATTE BASIN WAS ABOVE AVERAGE.
PRECIPITATION DURING MARCH IN THE NORTH PLATTE BASIN ABOVE SEMINOE
RESERVOIR WAS 161 PERCENT OF AVERAGE. IN THE NORTH PLATTE BASIN
BETWEEN SEMINOE RESERVOIR AND GUERNSY RESERVOIR PRECIPITATION WAS
180 PERCENT OF AVERAGE. THE NORTH PLATTE BASIN BELOW GUERNSY
RESERVOIR HAD 240 PERCENT OF AVERAGE PRECIPITATION.  THE HIGH
ELEVATIONS OF THE SOUTH PLATTE BASIN HAD 117 PERCENT OF AVERAGE
PRECIPITATION WHEREAS THE PLAINS HAD 152 PERCENT OF AVERAGE MARCH
PRECIPITATION.

STREAM FLOW IN THE PLATTE BASIN IS FORECAST TO BE NEAR AVERAGE
DURING THE UPCOMING SPRING AND SUMMER. RUNOFF FOR STREAMS ABOVE
SEMINOE RESERVOIR ARE EXPECTED TO BE ABOUT 97 PERCENT OF AVERAGE.
STREAM FLOWS FOR THE NORTH PLATTE BELOW SEMINOE RESERVOIR ARE
FORECAST TO BE 97 PERCENT OF AVERAGE. STREAMS IN THE SOUTH PLATTE
BASIN ABOVE SOUTH PLATTE, COLORADO CAN EXPECT 87 PERCENT OF AVERAGE
FLOW. FOR THE REMAINDER OF THE SOUTH PLATTE BASIN FLOWS ARE EXPECTED
NEAR 100 PERCENT OF AVERAGE.

STORED WATER IN THE SOUTH PLATTE BASIN WAS 107 PERCENT OF AVERAGE ON
APRIL 1.  STORED WATER IN THE NORTH PLATTE BASIN WAS 130 PERCENT OF
AVERAGE


WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MO
1347 CST WED APR 13 2016

DISSEMINATED WITH PERMISSION OF THE
US NATURAL RESOURCES CONSERVATION SERVICE

DATA CURRENT AS OF: APRIL 05 2016
BASED ON APRIL 01 2016 FORECAST VALUES

FINAL MISSOURI/YELLOWSTONE/PLATTE RIVER BASIN FORECASTS
                                       50%  % OF   MAX    MIN   30-YR
FORECAST POINT                   PERIOD (KAF)  AVG (KAF)  (KAF)   AVG
--------------                   ------ ----- ---- -----  -----  ----
ST. MARY R NR BABB (2)           APR-JUL  35095  415    285    370
                                 APR-SEP  40595  480    330    425
LIMA RESERVOIR INFLOW (2)        APR-JUL   7591   92     58     82
                                 APR-SEP   8191  101     61     89
CLARK CANYON RESERVOIR INFLOW (2)APR-JUL   9695  163     29    101
                                 APR-SEP  11798  188     46    120
BEAVERHEAD R AT BARRETTS (2)     APR-JUL  129  100  235     24    129
                                 APR-SEP  157  101  280     33    156
BIG HOLE R NR MELROSE            APR-JUL  585  114  740    430    515
                                 APR-SEP  635  113  805    465    560
RUBY R RESERVOIR INFLOW (2)      APR-JUL   77  100   99     55     77
                                 APR-SEP   91  100  117     65     91
HEBGEN RESERVOIR INFLOW (2)      APR-JUL  33089  380    280    370
                                 APR-SEP  42089  480    360    470
ENNIS RESERVOIR INFLOW (2)       APR-JUL  59595  710    475    625
                                 APR-SEP  73595  870    600    775
GALLATIN R NR GATEWAY            APR-JUL  39599  485    305    400
                                 APR-SEP  46098  565    355    470
GALLATIN R AT LOGAN              APR-JUL  42095  580    260    440
                                 APR-SEP  48095  665    300    505
MISSOURI R AT TOSTON (2)         APR-JUL 1820  102 2380   1250   1790
                                 APR-SEP 2090  101 2780   1400   2070
MISSOURI R AT FORT BENTON (2)    APR-JUL 242093 3270   1560   2610
                                 APR-SEP 288093 3930   1820   3110
MISSOURI R NR VIRGELLE (2)       APR-JUL 261087 3610   1620   3000
                                 APR-SEP 309088 4310   1870   3520
MISSOURI R NR LANDUSKY (2)       APR-JUL 276087 3760   1750   3160
                                 APR-SEP 328088 4520   2030   3720
MISSOURI R BL FT PECK DAM (2)    APR-JUL 279086 3930   1650   3240
                                 APR-SEP 319086 4660   1720   3700
LAKE SAKAKAWEA INFLOW (2)        APR-JUL 74108910200   4640   8310
                                 APR-SEP 83708911900   4830   9400
SHEEP CK NR WHITE SULPHUR SPRINGSAPR-JUL 16.2  105   22   10.8   15.5
                                 APR-SEP 19.2  104   26   12.6   18.4
GIBSON RESERVOIR INFLOW (2)      APR-JUL  24061  320    158    395
                                 APR-SEP  27061  360    178    440
MARIAS R NR SHELBY (2)           APR-JUL  17651  340   12.3    345
                                 APR-SEP  18251  360   10.4    360
NF MUSSELSHELL R NR DELPINE      APR-JUL  3.397  5.2   1.42    3.4
                                 APR-SEP  3.998  6.1   1.76    4.0
SF MUSSELSHELL R AB MARTINSDALE  APR-JUL   36  103   63    8.8     35
                                 APR-SEP   40  105   70   10.4     38
MUSSELSHELL R AT HARLOWTON (2)   APR-JUL   5698  107    5.3     57
                                 APR-SEP   5898  113    2.7     59
YELLOWSTONE R AT YELLOWSTONE LAKEAPR-JUL  54595  640    450    575
                                 APR-SEP  72594  850    600    770
YELLOWSTONE R AT CORWIN SPRINGS  APR-JUL 153096 1810   1250   1590
                                 APR-SEP 180096 2150   1450   1880
YELLOWSTONE R AT LIVINGSTON      APR-JUL 174097 2100   1380   1800
                                 APR-SEP 206096 2490   1630   2140
YELLOWSTONE R AT BILLINGS        APR-JUL 302093 3860   2180   3230
                                 APR-SEP 347093 4490   2450   3730
YELLOWSTONE R AT MILES CITY (2)  APR-JUL 442092 5850   2990   4780
                                 APR-SEP 503092 6850   3210   5450
YELLOWSTONE R NR SIDNEY (2)      APR-JUL 442092 6100   2740   4830
                                 APR-SEP 494091 7070   2810   5430
BOULDER R AT BIG TIMBER          APR-JUL  25591  320    188    280
                                 APR-SEP  27090  350    192    300
STILLWATER R NR ABSAROKEE (2)    APR-JUL  42094  515    325    445
                                 APR-SEP  49094  605    375    520
CLARKS FK YELLOWSTONE R NR BELFRYAPR-JUL  49096  575    405    510
                                 APR-SEP  53096  625    435    550
BOYSEN RESERVOIR INFLOW (2)      APR-JUL  675  111 1010    340    610
                                 APR-SEP  730  110 1100    360    665
BIGHORN R AT KANE (2)            APR-JUL  870  104 1390    350    840
                                 APR-SEP  940  104 1510    370    905
BIGHORN R NR ST. XAVIER (2)      APR-JUL 1420  103 2030    810   1380
                                 APR-SEP 1500  103 2200    800   1460
GREYBULL R NR MEETEETSE          APR-JUL  140  107  184     96    131
                                 APR-SEP  190  107  245    136    177
SHELL CK NR SHELL                APR-JUL   4073   54     25     55
                                 APR-SEP   5177   68     35     66
BUFFALO BILL RESERVOIR INFLOW (2)APR-JUL  700  104  835    565    675
                                 APR-SEP  770  103  930    610    745
LITTLE BIGHORN R NR HARDIN       APR-JUL   5253   94   10.3     98
                                 APR-SEP   6155  107   15.0    111
TONGUE R NR DAYTON (2)           APR-JUL   5362   80     26     86
                                 APR-SEP   6364   93     33     98
TONGUE RIVER RESERVOIR INFLOW (2)APR-JUL  12464  225     25    193
                                 APR-SEP  14065  245     35    215
ROCK CK NR BUFFALO               APR-JUL 15.382   23    8.1   18.6
                                 APR-SEP 18.584   26   10.9     22
NF POWDER R NR HAZELTON          APR-JUL  7.481  9.8    5.0    9.1
                                 APR-SEP  8.081 10.6    5.4    9.9
POWDER R AT MOORHEAD             APR-JUL  13777  250     22    177
                                 APR-SEP  15177  270     32    196
POWDER R NR LOCATE               APR-JUL  15678  295   17.6    199
                                 APR-SEP  17077  320     22    220


UPPER NORTH PLATTE RIVER BASIN
                                  50%  % OF MAX    MIN30-YR
FORECAST POINT                   PERIOD (KAF)  AVG(KAF)  (KAF)   AVG
--------------                   ------ ----- ---------  -----  -----
NORTH PLATTE R NR NORTHGATE      APR-JUL  250  111  345    159    225
                                 APR-SEP  275  110  380    169    250
ENCAMPMENT R NR ENCAMPMENT       APR-JUL  12194  156     86    129
                                 APR-SEP  13094  168     92    138
ROCK CK NR ARLINGTON             APR-JUL   49  100   62     36     49
                                 APR-SEP   52  100   66     38     52
SEMINOE RESERVOIR INFLOW (2)     APR-JUL  69597 1060    335    715
                                 APR-SEP  75598 1150    355    770


LOWER NORTH PLATTE, SWEETWATER & LARAMIE RIVER BASINS
                                         0%  % OF   MAX    MIN  30-YR
FORECAST POINT                     PERIOD (KAF)  AVG  KAF)(KAF) AVG
--------------                     ------ ----- ---- ---- ----- -----
SWEETWATER R NR ALCOVA             APR-JUL   43   73   71  14.9    59
                                   APR-SEP   47   73   78  16.5    64
LA PRELE CK AB LA PRELE RESERVOIR  APR-JUL   24  121   37  11.2  19.9
                                   APR-SEP   24  121   37  11.1  19.9
NORTH PLATTE R BL GLENDO RES (2)   APR-JUL  785   96 1050   520   820
                                   APR-SEP  810   95 1090   530   850
NORTH PLATTE R BL GUERNSEY RES (2) APR-JUL  800   98 1130   470   820
                                   APR-SEP  835   98 1180   495   850
LARAMIE R NR WOODS                 APR-JUL  125  109  164    86   115
                                   APR-SEP  137  109  181    94   126
LITTLE LARAMIE R NR FILMORE        APR-JUL   53  104   69    37    51
                                   APR-SEP   58  105   77    39    55


SOUTH PLATTE RIVER BASIN
                                      50%  % OF MAX  MIN30-YR
FORECAST POINT                     PERIOD (KAF)  AVG(KAF)(KAF)   AVG
--------------                     ------ ----- --------------  -----
ANTERO RESERVOIR INFLOW            APR-JUL 12.0   83 17.2  6.8   14.5
                                   APR-SEP 14.8   83   21  8.6   17.8
SPINNEY MOUNTAIN RES INFLOW (2)    APR-JUL   42   88   78   23     48
                                   APR-SEP   54   89  105   28     61
ELEVENMILE CANYON RES INFLOW (2)   APR-JUL   44   88   84   23     50
                                   APR-SEP   56   88  114   27     64
CHEESMAN LAKE INFLOW (2)           APR-JUL   83   83  164   42    100
                                   APR-SEP  105   83  210   52    126
SOUTH PLATTE R AT SOUTH PLATTE (2) APR-JUL  146   81  315   68    180
                                   APR-SEP  182   81  400   83    225
BEAR CK AB EVERGREEN               APR-JUL 16.1   98   35  7.5   16.4
                                   APR-SEP   21  100   45  9.9     21
BEAR CK AT MORRISON                APR-JUL   21   95   52  8.2     22
                                   APR-SEP   27   96   66 10.7     28
CLEAR CK AT GOLDEN                 APR-JUL  106  101  138   75    105
                                   APR-SEP  129  101  171   87    128
ST. VRAIN CK AT LYONS (2)          APR-JUL   90  102  107   73     88
                                   APR-SEP  107  104  127   87    103
BOULDER CK NR ORODELL (2)          APR-JUL   59  109   70   48     54
                                   APR-SEP   68  108   83   53     63
S BOULDER CK NR ELDORADO SPRINGS(2)APR-JUL   41  105   50   32     39
                                   APR-SEP   45  105   56   34     43
BIG THOMPSON R AT CANYON MOUTH (2) APR-JUL   90  100  112   68     90
                                   APR-SEP  107  100  134   80    107
CACHE LA POUDRE AT CANYON MOUTH (2)APR-JUL  240  107  360  160    225
                                   APR-SEP  260  104  390  174    250

 MAX (10%), 30%, 50%, 70% AND MIN (90%) CHANCE THAT ACTUAL
 VOLUME WILL EXCEED FORECAST.
 AVERAGES ARE FOR THE 1981-2010 PERIOD.
 ALL VOLUMES ARE IN THOUSANDS OF ACRE-FEET.

 FOOTNOTES:
 1) MAX AND MIN ARE 5% AND 95% CHANCE THAT ACTUAL VOLUME WILL
    EXCEED FORECAST
 2) STREAMFLOW IS ADJUSTED FOR UPSTREAM STORAGE
 3) MEDIAN VALUE USED IN PLACE OF AVERAGE



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