February 1, 2024 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of February 1
was below average. The snow pack in the St. Mary Basin was 56 percent,
and the Milk River Basin was 59 percent.
January precipitation across the Upper Missouri Basin was mostly near to below
average. Basin precipitation summaries for the Missouri Basin include: Milk St.
Mary, 71 percent; Milk Canada, 118 percent; Lower Milk, 75 percent; above Toston,
76 percent; Toston to Ft. Peck, 95 percent.
January 2024 Upper Missouri Mean Precip Oct-Jan 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 50 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, 2024 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 143 percent average storage, Clark Canyon was
holding 143 percent of average water, Gibson Reservoir had 30
percent of average stored water, and Fresno Reservoir had
41 percent of average stored water.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was below average
on February 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 86,
74, and 73 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 60 and 51 percent of average, respectively.
Precipitation during January was below average. The upper Yellowstone
River Basin received 57 percent of average precipitation while the
Lower Yellowstone River Basin reported 66 percent of average. The
Bighorn Basin received 52 percent of average precipitation while the
Wind River Basin received 61 percent of average. The Little Bighorn -
Upper Tongue Basin received 38 percent of average and the Powder River
had 48 percent of average precipitation.
January 2024 Yellowstone Mean Precip Oct-Jan 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
84 percent of average. Flow in the Tongue Basin is expected to be
79 percent of average. Flows in the Powder River are expected
to be about 68 percent of average.
Monthend storage at Boysen Reservoir was 107 percent of average.
Stored water in Buffalo Bill Reservoir was 107 percent of average.
Monthend storage was 100 percent of average at Bighorn Reservoir.
Yellowstone February 1, 2024 Spring and Summer Streamflow Forecasts
Platte Basin
The high elevation snow pack in the Upper North Platte Basin was
80 percent of average on February 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 85 percent of average. The snow
pack in the South Platte Basin was 90 percent of average.
Precipitation during January in the Upper North Platte Basin was 119
percent of average. In the Lower North Platte Basin, precipitation
was 94 percent of average. The North Platte Plains below Guernsy
Reservoir had 96 percent. The South Platte Mountains had 105
percent whereas the Plains had 86 percent of average January
precipitation.
January 2024 Platte Mean Precip Oct-Jan WY2024 Platte Mean Precip
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 85 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 91 percent
of average flow. For the remainder of the South Platte
basin, flows are expected near 92 percent.
Stored water in the South Platte Basin was 105 percent of average
on February 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1219 CST MONDAY FEBRUARY 05, 2024
DATA CURRENT AS OF: FEBRUARY 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 695 97 1343 355 720
SBDW4
Boysen Resvr Inflow Apr-Sep 1171 132 1882 727 890
SBDW4N
Bighorn R at Kane Apr-Sep 1262 128 2089 735 985
LVEW4
Bighorn R at Kane Apr-Sep 1976 137 2904 1290 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 293 149 400 180 196
MEEW4
Greybull R at Meeteetse Apr-Sep 293 143 400 180 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 605 74 900 489 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 697 77 994 562 910
CDYW4N
Keyhole Resvr Inflow Apr-Sep 6 150 18 2 4
KEYW4
St. Mary R nr Babb Apr-Sep 283 62 376 236 460
SMYM8
St. Mary R nr Babb Apr-Sep 269 50 363 220 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 203 52 336 143 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 323 49 449 261 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 11 10 30 5 113
PDBM8
Milk R nr Western Crossing Apr-Sep 15 37 42 6 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 147 68 216 135 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 36 32 140 17 112
ERNM8N
North Platte R nr Northgate Apr-Sep 337 138 557 202 245
NGTC2
North Platte R nr Northgate Apr-Sep 391 133 609 251 295
NGTC2N
Encampment R nr Encampment Apr-Sep 106 68 155 70 156
ECRW4
Encampment R nr Encampment Apr-Sep 117 70 165 81 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 41 77 57 30 53
KCRW4
Rock Cr nr Arlington Apr-Sep 41 77 57 30 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 710 93 1020 441 765
SETW4
Seminoe Resvr Inflow Apr-Sep 870 95 1175 590 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 46 43 107 24 108
WODW4
Laramie R nr Woods Landing Apr-Sep 82 58 142 49 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 48 87 82 33 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 50 88 84 35 57
SMTW4N
Antero Resvr Inflow Apr-Sep 13 93 20 7 14
ANRC2
Antero Resvr Inflow Apr-Sep 13 93 20 7 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 51 89 96 33 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 41 91 86 21 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 46 78 89 36 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 45 90 90 23 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 81 81 153 53 100
CHEC2
Cheesman Lk Inflow Apr-Sep 85 91 160 49 93
CHEC2N
S Platte R at S Platte Apr-Sep 354 148 446 302 240
SPTC2
S Platte R at S Platte Apr-Sep 169 82 270 98 205
SPTC2N
Bear Cr at Morrison Apr-Sep 18 69 35 10 26
MRRC2
Bear Cr at Morrison Apr-Sep 18 69 35 10 26
MRRC2N
Clear Cr at Golden Apr-Sep 100 85 148 58 118
GLDC2
Clear Cr at Golden Apr-Sep 112 85 161 67 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 57 72 93 37 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 82 75 129 55 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 39 83 64 26 47
OROC2
Boulder Cr nr Orodell Apr-Sep 54 104 80 36 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 34 97 50 20 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 38 95 60 20 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 163 151 264 91 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 193 92 292 106 210
FTDC2N
Lima Resvr Inflow Apr-Sep 46 61 77 19 76
LRRM8
Lima Resvr Inflow Apr-Sep 46 58 77 19 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 66 60 109 48 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 113 57 178 72 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 151 76 195 138 199
BARM8
Beaverhead R at Barretts Apr-Sep 146 52 218 101 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 83 94 100 64 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 83 86 100 64 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 298 50 430 159 595
MLRM8
Big Hole R nr Melrose Apr-Sep 363 55 497 217 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 396 85 488 310 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 396 85 488 310 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 616 86 714 508 715
ELMM8
Ennis Resvr Inflow Apr-Sep 654 90 782 504 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 165 35 212 127 475
GLGM8
Gallatin R nr Gateway Apr-Sep 165 35 212 127 475
GLGM8N
Gallatin R at Logan Apr-Sep 175 35 260 120 505
LOGM8
Gallatin R at Logan Apr-Sep 299 46 387 216 650
LOGM8N
Missouri R at Toston Apr-Sep 1244 60 1684 879 2060
TOSM8
Missouri R at Toston Apr-Sep 1838 65 2472 1364 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 1648 54 1813 1508 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 2621 64 3363 1924 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 1783 52 1998 1607 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 2917 64 3854 2100 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 1950 53 2232 1728 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3166 65 4145 2274 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 1811 47 2207 1472 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 3045 59 4063 2046 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 219 49 369 156 450
AGSM8
Gibson Resvr Inflow Apr-Sep 219 49 369 156 450
AGSM8N
Marias R nr Shelby Apr-Sep 181 42 384 103 435
SHLM8
Marias R nr Shelby Apr-Sep 219 45 432 128 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 95 119 165 66 80
HLWM8
Musselshell R at Harlowton Apr-Sep 111 117 180 80 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 692 85 828 563 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 875 104 1013 701 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1481 75 1787 1160 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 1762 85 2083 1381 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1710 75 2042 1326 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 2026 83 2404 1604 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2743 67 3221 1920 4070
BILM8
Yellowstone R at Billings Apr-Sep 3706 77 4274 2914 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 4383 75 6251 3416 5850
MILM8
Yellowstone R at Miles City Apr-Sep 6930 90 8659 5452 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 4409 77 6297 3212 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 7184 89 9100 5579 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 162 48 212 97 335
BTMM8
Boulder R at Big Timber Apr-Sep 202 54 252 135 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 412 76 523 309 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 468 79 579 369 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 381 61 508 279 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 454 65 580 351 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1611 113 2366 1056 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 2903 118 3949 2121 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 85 67 259 51 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 85 67 259 51 127
HRDM8N
Tongue R nr Dayton Apr-Sep 70 73 93 43 96
DAYW4
Tongue R nr Dayton Apr-Sep 76 75 99 49 101
DAYW4N
Tongue R nr Decker Apr-Sep 143 61 238 63 235
DSLM8
Tongue R nr Decker Apr-Sep 190 79 288 104 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 146 62 246 64 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 194 79 296 105 245
DKRM8N
Powder R at Moorhead Apr-Sep 146 65 334 59 225
MHDM8
Powder R at Moorhead Apr-Sep 190 70 378 88 270
MHDM8N
Powder R nr Locate Apr-Sep 161 62 367 63 260
LOCM8
Powder R nr Locate Apr-Sep 204 67 413 92 305
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
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