January 1, 2024 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of January 1
was below average. The snow pack in the St. Mary Basin was 51 percent,
and the Milk River Basin was 55 percent.
December precipitation across the Upper Missouri Basin was below average.
Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
87 percent; Milk Canada, 29 percent; Lower Milk, 28 percent; above Toston,
50 percent; Toston to Ft. Peck, 29 percent.
December 2023 Upper Missouri Mean Precip Oct-Dec WY2024 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 48 percent of average
April-September flows. Runoff is expected to range around
74 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri January 1, 2024 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 144 percent average storage, Clark Canyon was
holding 151 percent of average water, Gibson Reservoir had 29
percent of average stored water, and Fresno Reservoir had
43 percent of average stored water.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was below average
on January 1. The snow pack in the Upper Yellowstone Basin was 55 percent
of average. The snow packs in the Wind, Bighorn, and Shoshone Basins were 83,
75, and 77 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 59 and 51 percent of average, respectively.
Precipitation during December was below average. The upper Yellowstone
River Basin received 36 percent of average precipitation while the
Lower Yellowstone River Basin reported 46 percent of average. The
Bighorn Basin received 42 percent of average precipitation while the
Wind River Basin received 50 percent of average. The Little Bighorn -
Upper Tongue Basin received 32 percent of average, and the Powder River
had 30 percent of average precipitation.
December 2023 Yellowstone Mean Precip Oct-Dec WY2024 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
88 percent of average. Flow in the Tongue Basin is expected to be
83 percent of average. Flows in the Powder River are expected
to be about 75 percent of average.
Monthend storage at Boysen Reservoir was 108 percent of average.
Stored water in Buffalo Bill Reservoir was 106 percent of average.
Monthend storage was 102 percent of average at Bighorn Reservoir.
Yellowstone January 1, 2024 Spring and Summer Streamflow Forecasts
Platte Basin
The high elevation snow pack in the Upper North Platte Basin was
73 percent of average on January 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 74 percent of average. The snow
pack in the South Platte Basin was 72 percent of average.
Precipitation during December in the Upper North Platte Basin was 80
percent of average. In the Lower North Platte Basin, precipitation
was 38 percent of average. The North Platte Plains below Guernsy
Reservoir had 30 percent. The South Platte Mountains had 106
percent whereas the Plains had 80 percent of average December
precipitation.
December 2023 Platte Mean Precip Oct-Dec WY2024 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 72 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 76 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 112 percent of average
on January 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1413 CST WEDNESDAY JANUARY 03, 2024
DATA CURRENT AS OF: JANUARY 01, 2024
MISSOURI/YELLOWSTONE/PLATTE RIVER BASIN FORECASTS
50% % 10% 90% AVG
FORECAST POINT PERIOD (KAF) AVG (KAF) (KAF) (KAF)
--------------------------------------------------------------------
Boysen Resvr Inflow Apr-Sep 702 98 1321 394 720
SBDW4
Boysen Resvr Inflow Apr-Sep 1220 137 1896 816 890
SBDW4N
Bighorn R at Kane Apr-Sep 1362 138 2165 791 985
LVEW4
Bighorn R at Kane Apr-Sep 2080 144 2980 1400 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 282 144 391 165 196
MEEW4
Greybull R at Meeteetse Apr-Sep 282 138 391 165 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 635 78 990 438 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 731 80 1084 513 910
CDYW4N
Keyhole Resvr Inflow Apr-Sep 6 150 17 2 4
KEYW4
St. Mary R nr Babb Apr-Sep 286 62 397 231 460
SMYM8
St. Mary R nr Babb Apr-Sep 275 51 387 220 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 193 49 329 130 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 317 48 450 256 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 11 10 32 5 113
PDBM8
Milk R nr Western Crossing Apr-Sep 15 37 45 6 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 150 70 217 140 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 46 41 143 27 112
ERNM8N
North Platte R nr Northgate Apr-Sep 272 111 480 106 245
NGTC2
North Platte R nr Northgate Apr-Sep 323 109 532 145 295
NGTC2N
Encampment R nr Encampment Apr-Sep 86 55 134 43 156
ECRW4
Encampment R nr Encampment Apr-Sep 97 58 144 54 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 38 72 54 24 53
KCRW4
Rock Cr nr Arlington Apr-Sep 38 72 55 25 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 637 83 926 248 765
SETW4
Seminoe Resvr Inflow Apr-Sep 791 86 1086 374 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 43 40 107 16 108
WODW4
Laramie R nr Woods Landing Apr-Sep 79 56 142 42 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 39 71 75 22 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 41 72 77 24 57
SMTW4N
Antero Resvr Inflow Apr-Sep 12 86 20 7 14
ANRC2
Antero Resvr Inflow Apr-Sep 12 86 20 7 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 45 79 88 30 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 35 78 77 17 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 41 69 80 33 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 40 80 85 19 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 68 68 138 46 100
CHEC2
Cheesman Lk Inflow Apr-Sep 71 76 148 41 93
CHEC2N
S Platte R at S Platte Apr-Sep 323 135 424 296 240
SPTC2
S Platte R at S Platte Apr-Sep 136 66 242 72 205
SPTC2N
Bear Cr at Morrison Apr-Sep 15 58 30 7 26
MRRC2
Bear Cr at Morrison Apr-Sep 15 58 30 7 26
MRRC2N
Clear Cr at Golden Apr-Sep 76 64 115 41 118
GLDC2
Clear Cr at Golden Apr-Sep 87 66 129 48 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 53 67 84 33 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 77 71 116 50 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 31 66 51 22 47
OROC2
Boulder Cr nr Orodell Apr-Sep 46 88 68 32 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 30 86 40 16 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 31 78 48 16 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 156 144 253 77 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 187 89 290 91 210
FTDC2N
Lima Resvr Inflow Apr-Sep 60 79 95 24 76
LRRM8
Lima Resvr Inflow Apr-Sep 60 76 95 24 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 73 66 127 51 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 129 65 193 72 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 166 83 205 145 199
BARM8
Beaverhead R at Barretts Apr-Sep 164 59 237 98 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 86 98 100 62 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 86 89 100 62 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 343 58 506 191 595
MLRM8
Big Hole R nr Melrose Apr-Sep 408 62 573 259 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 424 91 537 298 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 424 91 537 298 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 667 93 797 493 715
ELMM8
Ennis Resvr Inflow Apr-Sep 712 98 874 494 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 191 40 252 147 475
GLGM8
Gallatin R nr Gateway Apr-Sep 191 40 252 147 475
GLGM8N
Gallatin R at Logan Apr-Sep 198 39 295 127 505
LOGM8
Gallatin R at Logan Apr-Sep 329 51 425 218 650
LOGM8N
Missouri R at Toston Apr-Sep 1382 67 1955 825 2060
TOSM8
Missouri R at Toston Apr-Sep 2040 72 2702 1380 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 1846 60 2130 1648 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 2980 73 3811 2096 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 1963 57 2325 1738 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 3362 74 4324 2348 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 2133 58 2575 1853 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3624 74 4618 2511 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 2438 63 2862 2030 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 3951 76 4956 2732 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 205 46 402 125 450
AGSM8
Gibson Resvr Inflow Apr-Sep 205 46 402 125 450
AGSM8N
Marias R nr Shelby Apr-Sep 203 47 470 110 435
SHLM8
Marias R nr Shelby Apr-Sep 247 50 523 137 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 98 122 171 68 80
HLWM8
Musselshell R at Harlowton Apr-Sep 114 120 185 82 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 713 87 886 509 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 899 107 1126 625 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1648 83 2061 1146 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 1912 92 2403 1342 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1904 83 2329 1351 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 2226 91 2749 1598 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2972 73 4000 2081 4070
BILM8
Yellowstone R at Billings Apr-Sep 3941 82 5089 2984 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 4950 85 8043 3499 5850
MILM8
Yellowstone R at Miles City Apr-Sep 7307 95 10459 5533 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 5023 88 8187 3455 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 7679 95 10954 5723 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 203 61 267 140 335
BTMM8
Boulder R at Big Timber Apr-Sep 244 65 309 181 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 451 84 576 320 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 504 85 632 379 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 447 72 674 323 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 517 74 746 397 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1569 110 2478 1028 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 2909 118 4047 2163 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 109 86 298 71 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 109 86 298 71 127
HRDM8N
Tongue R nr Dayton Apr-Sep 74 77 98 45 96
DAYW4
Tongue R nr Dayton Apr-Sep 79 78 104 51 101
DAYW4N
Tongue R nr Decker Apr-Sep 161 69 266 72 235
DSLM8
Tongue R nr Decker Apr-Sep 209 87 316 117 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 164 70 276 73 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 213 87 326 118 245
DKRM8N
Powder R at Moorhead Apr-Sep 160 71 345 60 225
MHDM8
Powder R at Moorhead Apr-Sep 208 77 390 96 270
MHDM8N
Powder R nr Locate Apr-Sep 167 64 391 64 260
LOCM8
Powder R nr Locate Apr-Sep 223 73 451 100 305
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 1991-2020.
The 50%, 10% and 90% columns indicate the probability that the
actual volume will exceed the forecast for the valid time period.
Beginning April 1, May and June official forecasts include observed
runoff volume up to official forecast date.
For more information, please visit: www.weather.gov/mbrfc/water
