January 1, 2022 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of January 1
was near to above average. The snow pack in the St. Mary Basin was 117 percent,
and the Milk River Basin was 91 percent.
December precipitation across the Upper Missouri Basin was above average.
Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
142 percent; Milk Canada, 129 percent; Lower Milk, 156 percent; above Toston,
120 percent; Toston to Ft. Peck, 183 percent.
December 2021 Upper Missouri Mean Precip Oct-Dec WY2022 Upper Missouri Mean Precip
Stream flow in the Upper Missouri Basin is forecast to be
below average during the upcoming Spring and Summer.
The St. Mary River is forecast to have 70 percent of average
April-September flows. Runoff is expected to range around
85 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri January 1, 2022 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 72 percent average storage, Clark Canyon was
holding 74 percent of average water, Gibson Reservoir had 60
percent of average stored water, and Fresno Reservoir had
68 percent of average stored water.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was near average
on January 1. The snow pack in the Upper Yellowstone Basin was 89 percent
of average. The snow packs in the Wind, Bighorn, and Shoshone Basins were 107,
83, and 90 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 81 and 80 percent of average, respectively.
Precipitation during December was near to above average. The upper Yellowstone
River Basin received 132 percent of average precipitation while the
Lower Yellowstone River Basin reported 153 percent of average. The
Bighorn Basin received 92 percent of average precipitation while the
Wind River Basin received 94 percent of average. The Little Bighorn -
Upper Tongue Basin received 143 percent of average and the Powder River
had 93 percent of average precipitation.
December 2021 Yellowstone Mean Precip Oct-Dec WY2022 Yellowstone Mean Precip
Forecast stream flow in the Yellowstone Basin is below average
for the upcoming Spring and Summer. Stream flow for the
Yellowstone River above Sidney, Montana is forecast to be about
93 percent of average. Flow in the Tongue Basin is expected to be
65 percent of average. Flows in the Powder River are expected
to be about 60 percent of average.
Monthend storage at Boysen Reservoir was 104 percent of average.
Stored water in Buffalo Bill Reservoir was 86 percent of average.
Monthend storage was 96 percent of average at Bighorn Reservoir.
Yellowstone January 1, 2022 Spring and Summer Streamflow Forecasts
Platte Basin
The high elevation snow pack in the Upper North Platte Basin was
117 percent of average on January 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 109 percent of average. The snow
pack in the South Platte Basin was 110 percent of average.
Precipitation during December in the Upper North Platte Basin was 186
percent of average. In the Lower North Platte Basin, precipitation
was 119 percent of average. The North Platte Plains below Guernsy
Reservoir had 108 percent. The South Platte Mountains had 64
percent whereas the Plains had 22 percent of average December
precipitation.
December 2021 Platte Mean Precip Oct-Dec WY2022 Platte Mean Precip
Stream flow in the Platte Basin is forecast to be below
average during the upcoming Spring and Summer. Runoff
for streams above Seminoe Reservoir are expected to be
about 95 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 80 percent
of average flow. For the remainder of the South Platte
basin, flows are expected near 78 percent.
Stored water in the South Platte Basin was 101 percent of average
on January 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
FGUS63 KKRF 071820
ESPKRF
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1211 CST FRIDAY JANUARY 07, 2022
DATA CURRENT AS OF: JANUARY 01, 2022
MISSOURI/YELLOWSTONE/PLATTE RIVER BASIN FORECASTS
50% % 10% 90% AVG
FORECAST POINT PERIOD (KAF) AVG (KAF) (KAF) (KAF)
--------------------------------------------------------------------
Boysen Resvr Inflow Apr-Sep 652 91 1233 330 720
SBDW4
Boysen Resvr Inflow Apr-Sep 1176 103 1809 746 1140
SBDW4N
Bighorn R at Kane Apr-Sep 1091 111 1884 571 985
LVEW4
Bighorn R at Kane Apr-Sep 1855 110 2719 1179 1690
LVEW4N
Greybull R at Meeteetse Apr-Sep 163 83 247 67 196
MEEW4
Greybull R at Meeteetse Apr-Sep 163 80 247 67 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 567 70 935 373 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 657 72 1029 456 910
CDYW4N
St. Mary R nr Babb Apr-Sep 404 88 517 347 460
SMYM8
St. Mary R nr Babb Apr-Sep 382 71 497 323 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 330 85 476 265 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 448 68 585 380 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 18 16 47 8 113
PDBM8
Milk R nr Western Crossing Apr-Sep 28 69 63 13 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 152 71 213 140 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 47 42 137 24 112
ERNM8N
North Platte R nr Northgate Apr-Sep 303 124 500 135 245
NGTC2
North Platte R nr Northgate Apr-Sep 356 121 552 181 295
NGTC2N
Encampment R nr Encampment Apr-Sep 135 86 186 87 156
ECRW4
Encampment R nr Encampment Apr-Sep 145 87 197 97 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 52 99 70 36 53
KCRW4
Rock Cr nr Arlington Apr-Sep 53 99 70 37 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 867 113 1194 426 765
SETW4
Seminoe Resvr Inflow Apr-Sep 1032 112 1361 581 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 79 74 150 33 108
WODW4
Laramie R nr Woods Landing Apr-Sep 115 81 185 67 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 64 117 107 41 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 66 117 109 43 57
SMTW4N
Antero Resvr Inflow Apr-Sep 12 86 19 6 14
ANRC2
Antero Resvr Inflow Apr-Sep 12 86 19 6 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 47 82 91 31 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 38 83 82 19 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 39 67 70 32 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 40 80 85 21 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 65 65 123 45 100
CHEC2
Cheesman Lk Inflow Apr-Sep 73 79 144 41 93
CHEC2N
S Platte R at S Platte Apr-Sep 322 134 411 295 240
SPTC2
S Platte R at S Platte Apr-Sep 143 70 249 78 205
SPTC2N
Bear Cr at Morrison Apr-Sep 14 54 28 7 26
MRRC2
Bear Cr at Morrison Apr-Sep 14 54 28 7 26
MRRC2N
Clear Cr at Golden Apr-Sep 88 75 132 49 118
GLDC2
Clear Cr at Golden Apr-Sep 101 77 146 57 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 66 84 95 42 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 94 86 132 64 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 37 79 59 26 47
OROC2
Boulder Cr nr Orodell Apr-Sep 53 101 76 37 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 29 84 40 16 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 31 77 48 16 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 213 197 320 107 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 247 118 356 131 210
FTDC2N
Lima Resvr Inflow Apr-Sep 38 50 63 19 76
LRRM8
Lima Resvr Inflow Apr-Sep 38 48 63 19 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 38 35 54 28 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 85 43 126 44 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 121 61 138 112 199
BARM8
Beaverhead R at Barretts Apr-Sep 114 41 154 67 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 74 84 88 53 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 74 76 88 53 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 419 70 597 249 595
MLRM8
Big Hole R nr Melrose Apr-Sep 483 73 660 317 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 363 78 460 251 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 363 78 460 251 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 521 73 619 385 715
ELMM8
Ennis Resvr Inflow Apr-Sep 557 75 703 390 745
ELMM8N
Gallatin R nr Gateway Apr-Sep 255 54 324 203 475
GLGM8
Gallatin R nr Gateway Apr-Sep 255 54 324 203 475
GLGM8N
Gallatin R at Logan Apr-Sep 259 51 370 175 505
LOGM8
Gallatin R at Logan Apr-Sep 393 60 497 284 650
LOGM8N
Missouri R at Toston Apr-Sep 1250 61 1816 751 2060
TOSM8
Missouri R at Toston Apr-Sep 1919 76 2569 1296 2510
TOSM8N
Missouri R at Fort Benton Apr-Sep 1771 58 2076 1589 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 2920 79 3693 2048 3690
FBNM8N
Missouri R nr Virgelle Apr-Sep 1919 56 2531 1690 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 3576 84 4447 2566 4280
VRGM8N
Missouri R nr Landusky Apr-Sep 2059 56 2661 1754 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3740 83 4669 2704 4490
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 2137 56 2755 1784 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 3830 81 4793 2746 4730
FPKM8N
Gibson Resvr Inflow Apr-Sep 320 71 538 226 450
AGSM8
Gibson Resvr Inflow Apr-Sep 320 71 538 226 450
AGSM8N
Marias R nr Shelby Apr-Sep 380 87 694 224 435
SHLM8
Marias R nr Shelby Apr-Sep 443 91 757 276 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 19 23 47 14 80
HLWM8
Musselshell R at Harlowton Apr-Sep 26 28 56 20 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 677 83 806 462 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 936 111 1117 680 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1632 82 1988 1144 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 1983 96 2408 1453 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1827 80 2225 1316 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 2258 93 2705 1686 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2588 64 3488 1745 4070
BILM8
Yellowstone R at Billings Apr-Sep 3638 76 4622 2785 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 3965 68 6360 2882 5850
MILM8
Yellowstone R at Miles City Apr-Sep 6494 90 9388 4973 7250
MILM8N
Yellowstone R at Sidney Apr-Sep 3824 67 6336 2644 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 6717 89 9772 5050 7540
SIDM8N
Boulder R at Big Timber Apr-Sep 214 64 282 152 335
BTMM8
Boulder R at Big Timber Apr-Sep 255 68 323 194 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 389 72 474 275 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 445 75 532 334 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 395 64 611 277 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 465 67 683 350 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1135 79 2024 765 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 2588 102 3663 1794 2550
STXM8N
Little Bighorn R nr Hardin Apr-Sep 78 62 197 48 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 78 62 197 48 127
HRDM8N
Tongue R nr Dayton Apr-Sep 59 61 78 40 96
DAYW4
Tongue R nr Dayton Apr-Sep 65 64 83 45 101
DAYW4N
Tongue R nr Decker Apr-Sep 111 47 172 50 235
DSLM8
Tongue R nr Decker Apr-Sep 158 66 222 91 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 112 48 184 50 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 159 65 231 92 245
DKRM8N
Powder R at Moorhead Apr-Sep 114 51 272 43 225
MHDM8
Powder R at Moorhead Apr-Sep 162 60 315 74 270
MHDM8N
Powder R nr Locate Apr-Sep 125 48 318 51 260
LOCM8
Powder R nr Locate Apr-Sep 175 58 356 81 305
LOCM8N
Locations with an `N` suffix indicate natural flows excluding
stream augmentations.
KAF: Thousands of Acre-feet
%AVG: Current 50%/AVG
AVG: Average(50%) seasonal runoff voulme as simulated by the river
forecast model considering acontinuous simulation of the basin
response to historic climate data (observed precipitation and
temperatures) over the period of 1981-2010.
The 50%, 10% and 90% columns indicate the probability that the
actual volume will exceed the forecast for the valid time perion
for more information, please visit: www.weather.gov/mbrfc/water
$$
