February 1, 2022 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of February 1
was near to above average. The snow pack in the St. Mary Basin was 105 percent,
and the Milk River Basin was 94 percent.
January precipitation across the Upper Missouri Basin was below average.
Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
81 percent; Milk Canada, 53 percent; Lower Milk, 35 percent; above Toston,
127 percent; Toston to Ft. Peck, 77 percent.
January 2022 Upper Missouri Mean Precip Oct-Jan 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 61 percent of average
April-September flows. Runoff is expected to range around
65 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri February 1, 2022 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 71 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
64 percent of average stored water.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was near to below average
on February 1. The snow pack in the Upper Yellowstone Basin was 85 percent
of average. The snow packs in the Wind, Bighorn, and Shoshone Basins were 106,
95, and 90 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 90 and 81 percent of average, respectively.
Precipitation during January was near to below average. The upper Yellowstone
River Basin received 81 percent of average precipitation while the
Lower Yellowstone River Basin reported 50 percent of average. The
Bighorn Basin received 94 percent of average precipitation while the
Wind River Basin received 97 percent of average. The Little Bighorn -
Upper Tongue Basin received 84 percent of average and the Powder River
had 58 percent of average precipitation.
January 2022 Yellowstone Mean Precip Oct-Jan 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
72 percent of average. Flow in the Tongue Basin is expected to be
60 percent of average. Flows in the Powder River are expected
to be about 47 percent of average.
Monthend storage at Boysen Reservoir was 106 percent of average.
Stored water in Buffalo Bill Reservoir was 87 percent of average.
Monthend storage was 96 percent of average at Bighorn Reservoir.
Yellowstone February 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 February 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 112 percent of average. The snow
pack in the South Platte Basin was 113 percent of average.
Precipitation during January in the Upper North Platte Basin was 89
percent of average. In the Lower North Platte Basin, precipitation
was 109 percent of average. The North Platte Plains below Guernsy
Reservoir had 212 percent. The South Platte Mountains had 199
percent whereas the Plains had 215 percent of average January
precipitation.
January 2022 Platte Mean Precip Oct-Jan 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 72 percent.
Stored water in the South Platte Basin was 104 percent of average
on February 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
FGUS63 KKRF 021339
ESPKRF
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
0733 CST WEDNESDAY FEBRUARY 02, 2022
DATA CURRENT AS OF: FEBRUARY 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 607 84 1126 268 720
SBDW4
Boysen Resvr Inflow Apr-Sep 1093 123 1667 646 890
SBDW4N
Bighorn R at Kane Apr-Sep 924 94 1722 531 985
LVEW4
Bighorn R at Kane Apr-Sep 1666 116 2523 1013 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 149 76 231 64 196
MEEW4
Greybull R at Meeteetse Apr-Sep 149 73 231 64 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 472 58 748 349 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 556 61 842 427 910
CDYW4N
St. Mary R nr Babb Apr-Sep 354 77 446 305 460
SMYM8
St. Mary R nr Babb Apr-Sep 332 62 425 284 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 273 70 407 215 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 387 59 514 328 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 12 11 35 6 113
PDBM8
Milk R nr Western Crossing Apr-Sep 20 49 48 10 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 147 68 212 138 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 37 33 133 19 112
ERNM8N
North Platte R nr Northgate Apr-Sep 336 137 558 204 245
NGTC2
North Platte R nr Northgate Apr-Sep 391 133 610 258 295
NGTC2N
Encampment R nr Encampment Apr-Sep 128 82 181 90 156
ECRW4
Encampment R nr Encampment Apr-Sep 139 84 191 101 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 48 90 65 36 53
KCRW4
Rock Cr nr Arlington Apr-Sep 48 90 65 37 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 837 109 1149 564 765
SETW4
Seminoe Resvr Inflow Apr-Sep 998 109 1306 726 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 72 66 137 37 108
WODW4
Laramie R nr Woods Landing Apr-Sep 107 75 172 67 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 65 119 101 48 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 68 118 104 50 57
SMTW4N
Antero Resvr Inflow Apr-Sep 11 79 18 6 14
ANRC2
Antero Resvr Inflow Apr-Sep 11 79 18 6 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 42 74 83 28 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 33 73 74 17 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 38 64 66 33 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 36 73 77 18 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 65 65 113 44 100
CHEC2
Cheesman Lk Inflow Apr-Sep 68 73 131 38 93
CHEC2N
S Platte R at S Platte Apr-Sep 319 133 397 292 240
SPTC2
S Platte R at S Platte Apr-Sep 137 67 229 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 81 69 127 46 118
GLDC2
Clear Cr at Golden Apr-Sep 92 70 140 54 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 65 83 97 43 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 92 84 143 63 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 41 86 65 26 47
OROC2
Boulder Cr nr Orodell Apr-Sep 56 108 81 38 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 30 85 43 15 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 32 81 52 15 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 209 193 315 116 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 241 115 349 143 210
FTDC2N
Lima Resvr Inflow Apr-Sep 31 41 53 20 76
LRRM8
Lima Resvr Inflow Apr-Sep 31 39 53 20 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 39 36 56 29 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 79 40 126 50 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 121 61 138 111 199
BARM8
Beaverhead R at Barretts Apr-Sep 107 38 156 74 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 68 77 83 51 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 68 70 83 51 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 439 74 608 276 595
MLRM8
Big Hole R nr Melrose Apr-Sep 505 76 678 341 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 328 71 402 249 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 328 71 402 249 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 477 67 545 391 715
ELMM8
Ennis Resvr Inflow Apr-Sep 503 69 617 392 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 225 47 295 185 475
GLGM8
Gallatin R nr Gateway Apr-Sep 225 47 295 185 475
GLGM8N
Gallatin R at Logan Apr-Sep 218 43 327 147 505
LOGM8
Gallatin R at Logan Apr-Sep 355 55 467 271 650
LOGM8N
Missouri R at Toston Apr-Sep 1191 58 1686 844 2060
TOSM8
Missouri R at Toston Apr-Sep 1818 64 2416 1387 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 1715 56 1909 1569 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 2688 66 3398 2016 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 1840 54 2189 1681 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 3133 69 4072 2341 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 1928 52 2276 1700 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3270 67 4264 2427 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 2014 52 2410 1738 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 3341 64 4371 2461 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 260 58 413 175 450
AGSM8
Gibson Resvr Inflow Apr-Sep 260 58 413 175 450
AGSM8N
Marias R nr Shelby Apr-Sep 295 68 532 196 435
SHLM8
Marias R nr Shelby Apr-Sep 348 71 594 243 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 17 21 40 13 80
HLWM8
Musselshell R at Harlowton Apr-Sep 23 25 48 19 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 621 76 762 490 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 840 100 982 655 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1400 71 1709 1088 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 1708 83 2016 1328 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1581 69 1893 1219 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 1938 79 2265 1530 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2279 56 2689 1502 4070
BILM8
Yellowstone R at Billings Apr-Sep 3293 69 3734 2521 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 3387 58 4694 2595 5850
MILM8
Yellowstone R at Miles City Apr-Sep 5757 75 7446 4486 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 3241 57 4626 2478 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 5926 74 7645 4565 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 173 52 235 113 335
BTMM8
Boulder R at Big Timber Apr-Sep 215 57 277 154 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 344 64 450 252 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 401 67 504 310 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 364 59 489 256 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 436 63 561 330 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1092 76 1706 759 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 2291 93 3321 1609 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 73 58 153 46 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 73 58 153 46 127
HRDM8N
Tongue R nr Dayton Apr-Sep 55 58 70 37 96
DAYW4
Tongue R nr Dayton Apr-Sep 61 60 76 43 101
DAYW4N
Tongue R nr Decker Apr-Sep 99 42 149 47 235
DSLM8
Tongue R nr Decker Apr-Sep 145 60 198 86 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 101 43 155 47 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 146 60 205 86 245
DKRM8N
Powder R at Moorhead Apr-Sep 93 42 230 34 225
MHDM8
Powder R at Moorhead Apr-Sep 130 48 274 57 270
MHDM8N
Powder R nr Locate Apr-Sep 98 38 270 36 260
LOCM8
Powder R nr Locate Apr-Sep 139 46 313 61 305
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
$$
