Upper Missouri Basin
May precipitation across the Upper Missouri Basin was above average. Basin for the Missouri Basin precipitation summaries include: Milk St. Mary, 51 percent; Milk Canada, 54 percent;
Lower Milk, 123 percent; above Toston, 67 percent; Toston to Ft. Peck, 112 percent.
May 2024 Upper Missouri Mean Precip Oct-May WY2024 Upper Missouri Mean Precip
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 117 percent average storage, Clark Canyon was
holding 125 percent of average water, Gibson Reservoir had 95
percent of average stored water, and Fresno Reservoir had
107 percent of average stored water.
Yellowstone Basin
Precipitation during May was above average. The upper Yellowstone
River Basin received 137 percent of average precipitation while the Lower
Yellowstone River Basin reported 160 percent of average. The Bighorn
Basin received 126 percent of average precipitation while the
Wind River Basin received 73 percent of average. The Little Bighorn -
Upper Tongue Basin received 139 percent of average and the Powder River
had 129 percent of average precipitation.
May 2024 Yellowstone Mean Precip Oct-May WY2024 Yellowstone Mean Precip
Month end storage at Boysen Reservoir was 96 percent of average.
Stored water in Buffalo Bill Reservoir was 107 percent of average.
Month end storage was 96 percent of average at Bighorn Reservoir.
Platte Basin
Precipitation during May in the Upper North Platte Basin was 85
percent of average. In the Lower North Platte Basin, precipitation
was 87 percent of average. The North Platte Plains below Guernsy
Reservoir had 88 percent. The South Platte Mountains had 60
percent whereas the Plains had 60 percent of average May
precipitation.
May 2024 Platte Mean Precip Oct-May WY2024 Platte Mean Precip
Stored water in the South Platte Basin was 108 percent of average
on June 1.
FGUS63 KKRF 051927
ESPKRF
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1408 CDT WEDNESDAY JUNE 05, 2024
DATA CURRENT AS OF: JUNE 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 432 60 570 387 720
SBDW4
Boysen Resvr Inflow Apr-Sep 763 86 927 701 890
SBDW4N
Bighorn R at Kane Apr-Sep 990 101 1202 923 985
LVEW4
Bighorn R at Kane Apr-Sep 1719 119 1980 1617 1440
LVEW4N
Greybull R at Meeteetse Apr-Sep 239 122 276 210 196
MEEW4
Greybull R at Meeteetse Apr-Sep 239 117 276 210 205
MEEW4N
Buffalo Bill Resvr Inflow Apr-Sep 596 73 683 538 815
CDYW4
Buffalo Bill Resvr Inflow Apr-Sep 691 76 777 638 910
CDYW4N
Keyhole Resvr Inflow Apr-Sep 5 125 8 4 4
KEYW4
St. Mary R nr Babb Apr-Sep 349 76 390 324 460
SMYM8
St. Mary R nr Babb Apr-Sep 334 62 374 306 535
SMYM8N
St. Mary R at Intl Boundary Apr-Sep 258 66 320 224 390
SMBM8
St. Mary R at Intl Boundary Apr-Sep 331 50 389 299 660
SMBM8N
Milk R nr Western Crossing Apr-Sep 19 17 33 18 113
PDBM8
Milk R nr Western Crossing Apr-Sep 23 56 44 19 41
PDBM8N
Milk R nr Eastern Crossing Apr-Sep 175 81 215 168 215
ERNM8
Milk R nr Eastern Crossing Apr-Sep 67 60 137 55 112
ERNM8N
North Platte R nr Northgate Apr-Sep 258 105 306 236 245
NGTC2
North Platte R nr Northgate Apr-Sep 310 105 358 287 295
NGTC2N
Encampment R nr Encampment Apr-Sep 175 112 187 168 156
ECRW4
Encampment R nr Encampment Apr-Sep 189 114 201 182 166
ECRW4N
Rock Cr nr Arlington Apr-Sep 59 111 64 58 53
KCRW4
Rock Cr nr Arlington Apr-Sep 59 111 64 58 53
KCRW4N
Seminoe Resvr Inflow Apr-Sep 773 101 900 725 765
SETW4
Seminoe Resvr Inflow Apr-Sep 986 107 1103 946 920
SETW4N
Laramie R nr Woods Landing Apr-Sep 60 56 77 54 108
WODW4
Laramie R nr Woods Landing Apr-Sep 99 70 116 92 142
WODW4N
Little Laramie R nr Filmore Apr-Sep 49 89 56 46 55
SMTW4
Little Laramie R nr Filmore Apr-Sep 51 89 59 48 57
SMTW4N
Antero Resvr Inflow Apr-Sep 17 121 21 16 14
ANRC2
Antero Resvr Inflow Apr-Sep 17 121 22 16 14
ANRC2N
Spinney Mountain Resvr Inflow Apr-Sep 63 111 76 58 57
SPYC2
Spinney Mountain Resvr Inflow Apr-Sep 51 113 64 47 45
SPYC2N
Elevenmile Canyon Resvr Inflow Apr-Sep 57 97 70 52 59
EVNC2
Elevenmile Canyon Resvr Inflow Apr-Sep 49 98 62 42 50
EVNC2N
Cheesman Lk Inflow Apr-Sep 105 105 123 95 100
CHEC2
Cheesman Lk Inflow Apr-Sep 101 109 118 89 93
CHEC2N
S Platte R at S Platte Apr-Sep 327 136 360 312 240
SPTC2
S Platte R at S Platte Apr-Sep 173 84 206 150 205
SPTC2N
Bear Cr at Morrison Apr-Sep 20 77 23 19 26
MRRC2
Bear Cr at Morrison Apr-Sep 20 77 23 19 26
MRRC2N
Clear Cr at Golden Apr-Sep 87 74 97 82 118
GLDC2
Clear Cr at Golden Apr-Sep 100 76 111 93 131
GLDC2N
St. Vrain Cr at Lyons Apr-Sep 51 65 62 47 79
LNSC2
St. Vrain Cr at Lyons Apr-Sep 75 69 89 69 109
LNSC2N
Boulder Cr nr Orodell Apr-Sep 34 72 41 32 47
OROC2
Boulder Cr nr Orodell Apr-Sep 45 87 53 43 52
OROC2N
S Boulder Cr nr Eldorado Sprgs Apr-Sep 30 86 35 28 35
BELC2
S Boulder Cr nr Eldorado Sprgs Apr-Sep 30 75 36 28 40
BELC2N
Cache La Poudre at Canyon Mouth Apr-Sep 125 116 144 113 108
FTDC2
Cache La Poudre at Canyon Mouth Apr-Sep 125 60 154 113 210
FTDC2N
Lima Resvr Inflow Apr-Sep 49 64 53 47 76
LRRM8
Lima Resvr Inflow Apr-Sep 49 62 53 47 79
LRRM8N
Clark Canyon Resvr Inflow Apr-Sep 80 73 85 79 110
CLKM8
Clark Canyon Resvr Inflow Apr-Sep 110 56 119 105 198
CLKM8N
Beaverhead R at Barretts Apr-Sep 148 74 155 147 199
BARM8
Beaverhead R at Barretts Apr-Sep 139 50 153 133 280
BARM8N
Ruby R Resvr Inflow Apr-Sep 80 91 90 74 88
ALRM8
Ruby R Resvr Inflow Apr-Sep 81 84 91 75 97
ALRM8N
Big Hole R nr Melrose Apr-Sep 352 59 426 311 595
MLRM8
Big Hole R nr Melrose Apr-Sep 418 63 491 375 660
MLRM8N
Hebgen Resvr Inflow Apr-Sep 411 88 427 391 465
HBDM8
Hebgen Resvr Inflow Apr-Sep 412 89 427 391 465
HBDM8N
Ennis Resvr Inflow Apr-Sep 618 86 655 580 715
ELMM8
Ennis Resvr Inflow Apr-Sep 634 87 672 590 730
ELMM8N
Gallatin R nr Gateway Apr-Sep 398 84 494 345 475
GLGM8
Gallatin R nr Gateway Apr-Sep 398 84 493 344 475
GLGM8N
Gallatin R at Logan Apr-Sep 424 84 543 349 505
LOGM8
Gallatin R at Logan Apr-Sep 571 88 691 496 650
LOGM8N
Missouri R at Toston Apr-Sep 1554 75 1842 1366 2060
TOSM8
Missouri R at Toston Apr-Sep 2170 77 2454 1971 2830
TOSM8N
Missouri R at Fort Benton Apr-Sep 2075 68 2169 2052 3060
FBNM8
Missouri R at Fort Benton Apr-Sep 3043 74 3381 2803 4100
FBNM8N
Missouri R nr Virgelle Apr-Sep 2234 65 2344 2199 3420
VRGM8
Missouri R nr Virgelle Apr-Sep 3362 74 3756 3105 4560
VRGM8N
Missouri R nr Landusky Apr-Sep 2349 64 2509 2299 3680
LDKM8
Missouri R nr Landusky Apr-Sep 3580 73 3980 3324 4890
LDKM8N
Missouri R below Fort Peck Dam Apr-Sep 2807 73 2975 2736 3840
FPKM8
Missouri R below Fort Peck Dam Apr-Sep 4189 81 4588 3903 5180
FPKM8N
Gibson Resvr Inflow Apr-Sep 247 55 315 215 450
AGSM8
Gibson Resvr Inflow Apr-Sep 247 55 315 215 450
AGSM8N
Marias R nr Shelby Apr-Sep 210 48 267 192 435
SHLM8
Marias R nr Shelby Apr-Sep 262 53 320 239 490
SHLM8N
Musselshell R at Harlowton Apr-Sep 53 66 70 37 80
HLWM8
Musselshell R at Harlowton Apr-Sep 71 75 89 52 95
HLWM8N
Yellowstone R at Yellowstone Lk Apr-Sep 736 90 793 697 815
YLOW4
Yellowstone R at Yellowstone Lk Apr-Sep 603 72 675 552 840
YLOW4N
Yellowstone R at Corwin Sprgs Apr-Sep 1531 77 1656 1440 1980
CORM8
Yellowstone R at Corwin Sprgs Apr-Sep 1496 72 1641 1393 2070
CORM8N
Yellowstone R at Livingston Apr-Sep 1805 79 1938 1701 2290
LIVM8
Yellowstone R at Livingston Apr-Sep 1835 75 1988 1720 2440
LIVM8N
Yellowstone R at Billings Apr-Sep 2967 73 3323 2728 4070
BILM8
Yellowstone R at Billings Apr-Sep 3645 76 4004 3396 4790
BILM8N
Yellowstone R at Miles City Apr-Sep 4767 81 5419 4440 5850
MILM8
Yellowstone R at Miles City Apr-Sep 6872 89 7620 6462 7690
MILM8N
Yellowstone R at Sidney Apr-Sep 4791 84 5527 4446 5710
SIDM8
Yellowstone R at Sidney Apr-Sep 7335 91 8154 6916 8060
SIDM8N
Boulder R at Big Timber Apr-Sep 197 59 238 179 335
BTMM8
Boulder R at Big Timber Apr-Sep 240 64 280 223 375
BTMM8N
Stillwater R nr Absarokee Apr-Sep 375 69 433 323 540
SRAM8
Stillwater R nr Absarokee Apr-Sep 435 73 492 385 595
SRAM8N
Clks Fk Yellowstone R nr Belfry Apr-Sep 464 75 522 417 620
BFYM8
Clks Fk Yellowstone R nr Belfry Apr-Sep 538 77 594 491 695
BFYM8N
Bighorn R nr St. Xavier Apr-Sep 1388 97 1674 1271 1430
STXM8
Bighorn R nr St. Xavier Apr-Sep 2682 109 3050 2530 2460
STXM8N
Little Bighorn R nr Hardin Apr-Sep 143 113 153 138 127
HRDM8
Little Bighorn R nr Hardin Apr-Sep 143 113 153 138 127
HRDM8N
Tongue R nr Dayton Apr-Sep 68 71 79 62 96
DAYW4
Tongue R nr Dayton Apr-Sep 74 73 85 68 101
DAYW4N
Tongue R nr Decker Apr-Sep 187 80 208 176 235
DSLM8
Tongue R nr Decker Apr-Sep 224 93 247 214 240
DSLM8N
Tongue R Resvr Inflow Apr-Sep 161 69 183 151 235
DKRM8
Tongue R Resvr Inflow Apr-Sep 204 83 227 194 245
DKRM8N
Powder R at Moorhead Apr-Sep 191 85 206 183 225
MHDM8
Powder R at Moorhead Apr-Sep 251 93 267 240 270
MHDM8N
Powder R nr Locate Apr-Sep 224 86 245 216 260
LOCM8
Powder R nr Locate Apr-Sep 287 94 308 275 305
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
