April 1, 2024 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of April 1
was below average. The snow pack in the St. Mary Basin was 79 percent,
and the Milk River Basin was 73 percent.
March precipitation across the Upper Missouri Basin was near to above average.
Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
90 percent; Milk Canada, 95 percent; Lower Milk, 164 percent; above Toston,
101 percent; Toston to Ft. Peck, 95 percent.
March 2024 Upper Missouri Mean Precip Oct-Mar 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 62 percent of average
April-September flows. Runoff is expected to range around
70 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri April 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 131 percent of average water, Gibson Reservoir had 42
percent of average stored water, and Fresno Reservoir had
47 percent of average stored water.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was below to near average
on April 1. The snow pack in the Upper Yellowstone Basin was 78 percent
of average. The snow packs in the Wind, Bighorn, and Shoshone Basins were 111,
81, and 96 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 73 and 67 percent of average, respectively.
Precipitation during March ranged from above to below average. The
upper Yellowstone River Basin received 116 percent of average precipitation
while the Lower Yellowstone River Basin reported 75 percent of average. The
Bighorn Basin received 95 percent of average precipitation while the
Wind River Basin received 112 percent of average. The Little Bighorn -
Upper Tongue Basin received 88 percent of average and the Powder River
had 57 percent of average precipitation.
March 2024 Yellowstone Mean Precip Oct-Mar WY2024 Yellowstone Mean Precip
Forecast streamflow 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
72 percent of average. Flows in the Powder River are expected
to be about 78 percent of average.
Monthend storage at Boysen Reservoir was 108 percent of average.
Stored water in Buffalo Bill Reservoir was 112 percent of average.
Monthend storage was 101 percent of average at Bighorn Reservoir.
Yellowstone April 1, 2024 Spring and Summer Streamflow Forecasts
Platte Basin
The high elevation snow pack in the Upper North Platte Basin was
103 percent of average on April 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 101 percent of average. The snow
pack in the South Platte Basin was 121 percent of average.
Precipitation during March in the Upper North Platte Basin was 145
percent of average. In the Lower North Platte Basin, precipitation
was 96 percent of average. The North Platte Plains below Guernsy
Reservoir had 106 percent. The South Platte Mountains had 209
percent whereas the Plains had 120 percent of average March
precipitation.
March 2024 Platte Mean Precip Oct-Mar WY2024 Platte Mean Precip
Stream flow in the Platte Basin is forecast to range from
below to above average during the upcoming Spring and Summer.
Runoff for streams above Seminoe Reservoir are expected to be
about 102 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 92 percent
of average flow. For the remainder of the South Platte
basin, flows are expected near 85 percent.
Stored water in the South Platte Basin was 100 percent of average
on April 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
FGUS63 KKRF 041730
ESPKRF
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1228 CDT THURSDAY APRIL 04, 2024
DATA CURRENT AS OF: APRIL 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 788 109 1287 465 720
SBDW4
Boysen Resvr Inflow Apr-Sep 1342 151 1880 985 890
SBDW4N
Bighorn R at Kane Apr-Sep 1142 116 1671 793 985
LVEW4
Bighorn R at Kane Apr-Sep 2131 148 2926 1569 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 294 150 446 218 196
MEEW4
Greybull R at Meeteetse Apr-Sep 294 143 446 218 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 708 87 901 582 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 798 88 978 660 910
CDYW4N
Keyhole Resvr Inflow Apr-Sep 4 100 14 2 4
KEYW4
St. Mary R nr Babb Apr-Sep 353 77 406 303 460
SMYM8
St. Mary R nr Babb Apr-Sep 331 62 385 280 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 283 73 390 220 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 400 61 494 341 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 14 12 46 9 113
PDBM8
Milk R nr Western Crossing Apr-Sep 21 51 62 12 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 150 70 223 139 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 45 40 162 26 112
ERNM8N
North Platte R nr Northgate Apr-Sep 315 129 412 231 245
NGTC2
North Platte R nr Northgate Apr-Sep 369 125 466 280 295
NGTC2N
Encampment R nr Encampment Apr-Sep 134 86 173 105 156
ECRW4
Encampment R nr Encampment Apr-Sep 145 87 183 117 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 53 100 62 42 53
KCRW4
Rock Cr nr Arlington Apr-Sep 54 102 62 43 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 799 104 1036 595 765
SETW4
Seminoe Resvr Inflow Apr-Sep 976 106 1194 759 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 65 60 94 35 108
WODW4
Laramie R nr Woods Landing Apr-Sep 99 70 129 65 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 59 107 73 46 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 61 107 75 48 57
SMTW4N
Antero Resvr Inflow Apr-Sep 13 93 20 9 14
ANRC2
Antero Resvr Inflow Apr-Sep 13 93 20 9 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 58 102 85 42 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 48 107 77 32 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 58 98 81 42 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 53 106 84 36 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 94 94 158 62 100
CHEC2
Cheesman Lk Inflow Apr-Sep 95 102 162 63 93
CHEC2N
S Platte R at S Platte Apr-Sep 291 121 418 250 240
SPTC2
S Platte R at S Platte Apr-Sep 167 81 304 116 205
SPTC2N
Bear Cr at Morrison Apr-Sep 23 88 49 11 26
MRRC2
Bear Cr at Morrison Apr-Sep 23 88 49 11 26
MRRC2N
Clear Cr at Golden Apr-Sep 92 78 154 66 118
GLDC2
Clear Cr at Golden Apr-Sep 105 80 170 76 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 55 70 101 43 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 80 73 138 65 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 43 91 73 31 47
OROC2
Boulder Cr nr Orodell Apr-Sep 58 112 89 45 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 39 111 51 29 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 42 105 75 29 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 181 168 306 118 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 215 102 345 141 210
FTDC2N
Lima Resvr Inflow Apr-Sep 66 87 92 51 76
LRRM8
Lima Resvr Inflow Apr-Sep 66 84 92 51 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 83 75 146 68 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 148 75 224 121 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 159 80 203 146 199
BARM8
Beaverhead R at Barretts Apr-Sep 191 68 272 165 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 89 101 108 78 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 89 92 108 78 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 310 52 471 252 595
MLRM8
Big Hole R nr Melrose Apr-Sep 373 57 537 316 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 478 103 539 414 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 478 103 539 414 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 697 97 825 624 715
ELMM8
Ennis Resvr Inflow Apr-Sep 739 101 868 650 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 156 33 214 128 475
GLGM8
Gallatin R nr Gateway Apr-Sep 155 33 213 127 475
GLGM8N
Gallatin R at Logan Apr-Sep 161 32 257 113 505
LOGM8
Gallatin R at Logan Apr-Sep 270 42 363 216 650
LOGM8N
Missouri R at Toston Apr-Sep 1283 62 1855 1056 2060
TOSM8
Missouri R at Toston Apr-Sep 1940 69 2570 1694 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 1814 59 2057 1720 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 2828 69 3744 2560 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 1958 57 2236 1848 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 3187 70 4157 2824 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 2136 58 2515 1980 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3411 70 4512 3063 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 2626 68 3077 2435 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 3985 77 5166 3586 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 237 53 372 175 450
AGSM8
Gibson Resvr Inflow Apr-Sep 237 53 372 175 450
AGSM8N
Marias R nr Shelby Apr-Sep 216 50 356 161 435
SHLM8
Marias R nr Shelby Apr-Sep 262 53 403 202 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 78 98 128 57 80
HLWM8
Musselshell R at Harlowton Apr-Sep 94 99 148 72 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 880 108 994 769 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 1098 131 1214 962 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1708 86 2037 1470 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 2031 98 2369 1796 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1929 84 2314 1661 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 2316 95 2703 2026 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2930 72 3827 2468 4070
BILM8
Yellowstone R at Billings Apr-Sep 3978 83 4806 3474 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 4388 75 5959 3712 5850
MILM8
Yellowstone R at Miles City Apr-Sep 7144 93 8680 6041 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 4398 77 6177 3634 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 7497 93 9194 6310 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 140 42 222 102 335
BTMM8
Boulder R at Big Timber Apr-Sep 182 49 263 145 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 395 73 516 335 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 452 76 569 395 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 431 70 558 358 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 504 73 629 431 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1407 98 2210 1117 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 3072 125 4136 2388 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 112 88 154 78 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 112 88 154 78 127
HRDM8N
Tongue R nr Dayton Apr-Sep 64 67 94 39 96
DAYW4
Tongue R nr Dayton Apr-Sep 70 69 99 45 101
DAYW4N
Tongue R nr Decker Apr-Sep 129 55 214 70 235
DSLM8
Tongue R nr Decker Apr-Sep 177 74 261 114 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 131 56 229 71 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 180 73 276 115 245
DKRM8N
Powder R at Moorhead Apr-Sep 157 70 334 99 225
MHDM8
Powder R at Moorhead Apr-Sep 203 75 383 141 270
MHDM8N
Powder R nr Locate Apr-Sep 200 77 400 134 260
LOCM8
Powder R nr Locate Apr-Sep 245 80 451 177 305
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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