March 1, 2025 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of March 1
was below average. The snow pack in the St. Mary Basin was 72 percent,
and the Jefferson River Basin was 95 percent.
February precipitation across the Upper Missouri Basin was above average.
Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
99 percent; Milk Canada, 168 percent; Lower Milk, 161 percent; above Toston,
159 percent; Toston to Ft. Peck, 192 percent.
February 2025 Upper Missouri Mean Precip Oct-Feb WY2025 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 51 percent of average
April-September flows. Runoff is expected to range around
71 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri March 1, 2025 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 102 percent average storage, Clark Canyon was
holding 115 percent of average water, Gibson Reservoir had 18
percent of average stored water, and Fresno Reservoir had
61 percent of average stored water.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was near average
on March 1. The snow pack in the Upper Yellowstone Basin was 98 percent
of average. The snow packs in the Wind, Bighorn, and Shoshone Basins were 107,
99, and 98 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 94 and 74 percent of average, respectively.
Precipitation during February was above average. The upper Yellowstone
River Basin received 245 percent of average precipitation while the
Lower Yellowstone River Basin reported 140 percent of average. The
Bighorn Basin received 190 percent of average precipitation while the
Wind River Basin received 99 percent of average. The Little Bighorn -
Upper Tongue Basin received 123 percent of average and the Powder River
had 57 percent of average precipitation.
February 2025 Yellowstone Mean Precip Oct-Feb WY2025 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
62 percent of average. Flow in the Tongue Basin is expected to be
62 percent of average. Flows in the Powder River are expected
to be about 41 percent of average.
Monthend storage at Boysen Reservoir was 86 percent of average.
Stored water in Buffalo Bill Reservoir was 85 percent of average.
Monthend storage was 96 percent of average at Bighorn Reservoir.
Yellowstone March 1, 2025 Spring and Summer Streamflow Forecasts
Platte Basin
The high elevation snow pack in the Upper North Platte Basin was
95 percent of average on March 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 78 percent of average. The snow
pack in the South Platte Basin was 105 percent of average.
Precipitation during February in the Upper North Platte Basin was 95
percent of average. In the Lower North Platte Basin, precipitation
was 65 percent of average. The North Platte Plains below Guernsy
Reservoir had 67 percent. The South Platte Mountains had 105
percent whereas the Plains had 99 percent of average February
precipitation.
February 2025 Platte Mean Precip Oct-Feb WY2025 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 71 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 73 percent
of average flow. For the remainder of the South Platte
basin, flows are expected near 75 percent.
Stored water in the South Platte Basin was 101 percent of average
on March 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1156 CST WEDNESDAY MARCH 05, 2025
DATA CURRENT AS OF: MARCH 01, 2025
MISSOURI/YELLOWSTONE/PLATTE RIVER BASIN FORECASTS
50% % 10% 90% AVG
FORECAST POINT PERIOD (KAF) AVG (KAF) (KAF) (KAF)
--------------------------------------------------------------------
Boysen Resvr Inflow Apr-Sep 318 44 787 132 720
SBDW4
Boysen Resvr Inflow Apr-Sep 766 86 1319 428 890
SBDW4N
Bighorn R at Kane Apr-Sep 637 65 1089 400 985
LVEW4
Bighorn R at Kane Apr-Sep 1254 87 2028 693 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 148 76 230 68 196
MEEW4
Greybull R at Meeteetse Apr-Sep 148 72 230 68 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 459 56 622 319 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 536 59 702 398 910
CDYW4N
Keyhole Resvr Inflow Apr-Sep 6 150 15 2 4
KEYW4
St. Mary R nr Babb Apr-Sep 288 63 351 248 460
SMYM8
St. Mary R nr Babb Apr-Sep 280 52 341 239 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 338 87 417 290 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 330 50 409 282 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 9 8 28 5 113
PDBM8
Milk R nr Western Crossing Apr-Sep 13 32 40 6 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 14 7 104 7 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 42 38 156 19 112
ERNM8N
North Platte R nr Northgate Apr-Sep 196 80 338 111 245
NGTC2
North Platte R nr Northgate Apr-Sep 250 85 391 159 295
NGTC2N
Encampment R nr Encampment Apr-Sep 88 56 147 61 156
ECRW4
Encampment R nr Encampment Apr-Sep 98 59 157 73 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 48 91 61 37 53
KCRW4
Rock Cr nr Arlington Apr-Sep 48 91 62 37 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 508 66 863 311 765
SETW4
Seminoe Resvr Inflow Apr-Sep 673 73 1023 477 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 49 45 97 21 108
WODW4
Laramie R nr Woods Landing Apr-Sep 84 59 133 51 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 58 105 82 41 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 60 105 84 43 57
SMTW4N
Antero Resvr Inflow Apr-Sep 12 86 21 7 14
ANRC2
Antero Resvr Inflow Apr-Sep 12 86 21 7 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 41 72 65 28 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 36 80 62 20 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 36 61 47 31 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 38 76 66 22 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 44 44 77 34 100
CHEC2
Cheesman Lk Inflow Apr-Sep 66 71 115 40 93
CHEC2N
S Platte R at S Platte Apr-Sep 309 129 390 275 240
SPTC2
S Platte R at S Platte Apr-Sep 141 69 233 78 205
SPTC2N
Bear Cr at Morrison Apr-Sep 15 58 31 6 26
MRRC2
Bear Cr at Morrison Apr-Sep 15 58 31 6 26
MRRC2N
Clear Cr at Golden Apr-Sep 96 81 140 68 118
GLDC2
Clear Cr at Golden Apr-Sep 110 84 153 78 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 58 73 97 39 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 84 77 132 59 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 38 81 59 26 47
OROC2
Boulder Cr nr Orodell Apr-Sep 53 102 76 39 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 29 83 41 20 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 31 78 50 20 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 164 152 263 97 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 206 98 302 118 210
FTDC2N
Lima Resvr Inflow Apr-Sep 31 41 55 19 76
LRRM8
Lima Resvr Inflow Apr-Sep 31 39 55 19 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 47 43 60 38 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 85 43 132 61 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 125 63 144 116 199
BARM8
Beaverhead R at Barretts Apr-Sep 111 40 164 87 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 66 75 82 53 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 66 68 82 53 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 344 58 577 233 595
MLRM8
Big Hole R nr Melrose Apr-Sep 408 62 642 297 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 373 80 433 306 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 373 80 433 306 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 612 86 691 525 715
ELMM8
Ennis Resvr Inflow Apr-Sep 653 89 754 535 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 276 58 364 237 475
GLGM8
Gallatin R nr Gateway Apr-Sep 276 58 364 237 475
GLGM8N
Gallatin R at Logan Apr-Sep 290 57 439 221 505
LOGM8
Gallatin R at Logan Apr-Sep 437 67 575 372 650
LOGM8N
Missouri R at Toston Apr-Sep 1282 62 1889 963 2060
TOSM8
Missouri R at Toston Apr-Sep 1925 68 2506 1534 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 1821 60 2109 1696 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 2915 71 3683 2335 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 1984 58 2247 1811 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 3304 72 4069 2534 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 2176 59 2574 1962 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3558 73 4441 2722 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 2391 62 2855 2079 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 3802 73 4890 2874 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 240 53 364 176 450
AGSM8
Gibson Resvr Inflow Apr-Sep 240 53 364 176 450
AGSM8N
Marias R nr Shelby Apr-Sep 164 38 324 107 435
SHLM8
Marias R nr Shelby Apr-Sep 199 41 364 133 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 26 32 63 14 80
HLWM8
Musselshell R at Harlowton Apr-Sep 34 36 72 20 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 304 37 412 245 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 461 55 606 359 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1057 53 1301 862 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 1270 61 1563 1014 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1226 54 1556 1025 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 1518 62 1873 1236 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2098 52 2710 1621 4070
BILM8
Yellowstone R at Billings Apr-Sep 3039 63 3664 2501 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 3151 54 4259 2588 5850
MILM8
Yellowstone R at Miles City Apr-Sep 5259 68 6627 4388 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 3115 55 4188 2451 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 5452 68 6942 4443 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 201 60 264 157 335
BTMM8
Boulder R at Big Timber Apr-Sep 244 65 305 197 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 299 55 382 238 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 357 60 434 297 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 434 70 523 339 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 505 73 593 412 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 805 56 1101 630 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 1908 78 2784 1216 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 99 78 230 59 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 99 78 230 59 127
HRDM8N
Tongue R nr Dayton Apr-Sep 60 62 77 38 96
DAYW4
Tongue R nr Dayton Apr-Sep 65 64 82 44 101
DAYW4N
Tongue R nr Decker Apr-Sep 98 42 157 47 235
DSLM8
Tongue R nr Decker Apr-Sep 144 60 205 86 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 100 43 168 48 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 146 60 214 87 245
DKRM8N
Powder R at Moorhead Apr-Sep 80 36 205 29 225
MHDM8
Powder R at Moorhead Apr-Sep 110 41 245 44 270
MHDM8N
Powder R nr Locate Apr-Sep 95 37 260 37 260
LOCM8
Powder R nr Locate Apr-Sep 125 41 296 53 305
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
