June 1, 2022 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
May precipitation across the Upper Missouri Basin ranged from below to above
average. Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
72 percent; Milk Canada, 42 percent; Lower Milk, 86 percent; above Toston,
139 percent; Toston to Ft. Peck, 60 percent.
May 2022 Upper Missouri Mean Precip Oct-May 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 54 percent of average
June-September flows. Runoff is expected to range around
87 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri June 1, 2022 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 74 percent average storage, Clark Canyon was
holding 71 percent of average water, Gibson Reservoir had 65
percent of average stored water, and Fresno Reservoir had
41 percent of average stored water.
Yellowstone Basin
Precipitation during May was above average. The upper Yellowstone River
Basin received 147 percent of average precipitation while the Lower
Yellowstone River Basin reported 103 percent of average. The Bighorn
Basin received 136 percent of average precipitation while the
Wind River Basin received 150 percent of average. The Little Bighorn -
Upper Tongue Basin received 110 percent of average and the Powder River
had 121 percent of average precipitation.
May 2022 Yellowstone Mean Precip Oct-May WY2022 Yellowstone Mean Precip
Forecast stream flow in the Yellowstone Basin is near average
for the upcoming Spring and Summer. Stream flow for the
Yellowstone River above Sidney, Montana is forecast to be about
96 percent of average. Flow in the Tongue Basin is expected to be
86 percent of average. Flows in the Powder River are expected
to be about 72 percent of average.
Month end storage at Boysen Reservoir was 108 percent of average.
Stored water in Buffalo Bill Reservoir was 89 percent of average.
Month end storage was 99 percent of average at Bighorn Reservoir.
Yellowstone June 1, 2022 Spring and Summer Streamflow Forecasts
Platte Basin
Precipitation during May in the Upper North Platte Basin was 107
percent of average. In the Lower North Platte Basin, precipitation
was 95 percent of average. The North Platte Plains below Guernsy
Reservoir had 79 percent. The South Platte Mountains had 122
percent whereas the Plains had 65 percent of average May
precipitation.
May 2022 Platte Mean Precip Oct-May 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 85 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 54 percent
of average flow. For the remainder of the South Platte
basin, flows are expected near 48 percent.
Stored water in the South Platte Basin was 91 percent of average
on June 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
000
FGUS63 KKRF 031654
ESPKRF
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1148 CDT FRIDAY JUNE 03, 2022
DATA CURRENT AS OF: JUNE 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 471 65 665 415 720
SBDW4
Boysen Resvr Inflow Apr-Sep 840 94 1036 762 890
SBDW4N
Bighorn R at Kane Apr-Sep 999 101 1304 905 985
LVEW4
Bighorn R at Kane Apr-Sep 1613 112 1941 1497 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 206 105 249 176 196
MEEW4
Greybull R at Meeteetse Apr-Sep 206 100 249 176 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 726 89 843 657 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 824 91 935 759 910
CDYW4N
St. Mary R nr Babb Apr-Sep 349 76 395 329 460
SMYM8
St. Mary R nr Babb Apr-Sep 332 62 379 311 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 230 59 298 198 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 302 46 367 274 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 7 6 19 6 113
PDBM8
Milk R nr Western Crossing Apr-Sep 10 24 27 8 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 177 82 201 169 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 29 26 79 22 112
ERNM8N
North Platte R nr Northgate Apr-Sep 221 90 271 196 245
NGTC2
North Platte R nr Northgate Apr-Sep 277 94 326 252 295
NGTC2N
Encampment R nr Encampment Apr-Sep 139 89 151 133 156
ECRW4
Encampment R nr Encampment Apr-Sep 148 89 159 142 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 44 83 50 43 53
KCRW4
Rock Cr nr Arlington Apr-Sep 45 85 50 43 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 609 80 737 561 765
SETW4
Seminoe Resvr Inflow Apr-Sep 781 85 901 740 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 60 56 72 54 108
WODW4
Laramie R nr Woods Landing Apr-Sep 53 37 65 47 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 32 58 39 29 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 34 60 41 32 57
SMTW4N
Antero Resvr Inflow Apr-Sep 6 43 10 6 14
ANRC2
Antero Resvr Inflow Apr-Sep 6 43 10 5 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 43 75 50 38 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 31 69 40 26 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 47 80 54 44 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 33 66 44 27 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 57 57 72 50 100
CHEC2
Cheesman Lk Inflow Apr-Sep 50 54 68 38 93
CHEC2N
S Platte R at S Platte Apr-Sep 184 77 205 177 240
SPTC2
S Platte R at S Platte Apr-Sep 103 50 136 84 205
SPTC2N
Bear Cr at Morrison Apr-Sep 11 42 15 10 26
MRRC2
Bear Cr at Morrison Apr-Sep 11 42 15 10 26
MRRC2N
Clear Cr at Golden Apr-Sep 44 37 53 40 118
GLDC2
Clear Cr at Golden Apr-Sep 50 38 61 46 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 32 41 41 28 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 51 47 64 46 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 23 49 28 21 47
OROC2
Boulder Cr nr Orodell Apr-Sep 35 67 42 33 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 12 34 17 11 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 12 30 18 11 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 156 144 183 146 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 151 72 182 140 210
FTDC2N
Lima Resvr Inflow Apr-Sep 33 43 40 31 76
LRRM8
Lima Resvr Inflow Apr-Sep 33 42 40 31 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 38 35 42 37 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 63 32 76 56 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 117 59 124 114 199
BARM8
Beaverhead R at Barretts Apr-Sep 96 34 116 89 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 78 89 91 70 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 80 82 92 72 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 583 98 680 501 595
MLRM8
Big Hole R nr Melrose Apr-Sep 651 99 746 565 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 443 95 463 420 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 443 95 464 420 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 628 88 684 585 715
ELMM8
Ennis Resvr Inflow Apr-Sep 695 95 752 649 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 549 116 660 484 475
GLGM8
Gallatin R nr Gateway Apr-Sep 549 116 659 484 475
GLGM8N
Gallatin R at Logan Apr-Sep 613 121 759 503 505
LOGM8
Gallatin R at Logan Apr-Sep 752 116 895 660 650
LOGM8N
Missouri R at Toston Apr-Sep 2036 99 2393 1776 2060
TOSM8
Missouri R at Toston Apr-Sep 2724 96 3077 2456 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 1733 57 2160 1630 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 3707 90 4170 3380 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 1855 54 2287 1755 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 4104 90 4657 3755 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 1912 52 2354 1807 3680
LDKM8
Missouri R nr Landusky Apr-Sep 4237 87 4793 3879 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 1937 50 2407 1817 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 4335 84 4897 3962 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 468 104 557 429 450
AGSM8
Gibson Resvr Inflow Apr-Sep 469 104 558 429 450
AGSM8N
Marias R nr Shelby Apr-Sep 316 73 409 293 435
SHLM8
Marias R nr Shelby Apr-Sep 380 78 467 353 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 16 20 18 15 80
HLWM8
Musselshell R at Harlowton Apr-Sep 22 23 25 21 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 895 110 970 844 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 838 100 931 770 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 2014 102 2168 1884 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 2027 98 2215 1886 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 2186 95 2367 2041 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 2274 93 2481 2120 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 3857 95 4362 3533 4070
BILM8
Yellowstone R at Billings Apr-Sep 4264 89 4785 3950 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 5356 92 6194 4828 5850
MILM8
Yellowstone R at Miles City Apr-Sep 7371 96 8295 6790 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 5355 94 6240 4888 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 7731 96 8675 7137 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 326 97 373 294 335
BTMM8
Boulder R at Big Timber Apr-Sep 361 96 410 331 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 527 98 595 471 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 567 95 636 512 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 639 103 712 583 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 694 100 765 640 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1176 82 1598 997 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 2584 105 3003 2382 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 105 83 119 98 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 105 83 119 98 127
HRDM8N
Tongue R nr Dayton Apr-Sep 74 77 81 67 96
DAYW4
Tongue R nr Dayton Apr-Sep 79 78 86 72 101
DAYW4N
Tongue R nr Decker Apr-Sep 198 84 218 179 235
DSLM8
Tongue R nr Decker Apr-Sep 230 96 249 211 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 165 70 185 146 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 210 86 230 191 245
DKRM8N
Powder R at Moorhead Apr-Sep 141 63 164 132 225
MHDM8
Powder R at Moorhead Apr-Sep 178 66 199 166 270
MHDM8N
Powder R nr Locate Apr-Sep 195 75 221 185 260
LOCM8
Powder R nr Locate Apr-Sep 235 77 258 221 305
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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