March 1, 2019 Spring and Summer Streamflow Forecasts
Upper Missouri Basin
The high elevation snow pack in the Upper Missouri Basin as of March 1
was near to above average. The snow pack above Fort Peck, Montana was
113 percent. The snow pack in the St. Mary Basin was 91 percent, and the
Milk River Basin was 150 percent.
February precipitation across the Upper Missouri Basin was above average.
Basin precipitation summaries for the Missouri Basin include: Milk St. Mary,
104 percent; Milk Canada, 141 percent; Lower Milk, 406 percent; above Toston,
293 percent; Toston to Ft. Peck, 371 percent.
February 2019 Upper Missouri Mean Precip Oct-Feb WY2019 Upper Missouri Mean Precip
Stream flow in the Upper Missouri Basin is forecast to be
near to below average during the upcoming Spring and Summer.
The St. Mary River is forecast to have 85 percent of average
April-September flows. Runoff is expected to range around
104 percent of average for the Missouri Basin above Fort Peck,
Montana.
Upper Missouri March 1, 2019 Spring and Summer Streamflow Forecasts
Of the four major irrigation reservoirs in Montana; Lima
Reservoir had 161 percent average storage, Clark Canyon was
holding 124 percent of average water, Gibson Reservoir had 38
percent of average stored water, and Fresno Reservoir had
91 percent of average stored water.
The major hydroelectric reservoirs in Montana (Canyon Ferry and
Fort Peck), had monthend storage in the average to above
average range; 98 and 117 percent of average water, respectively.
Yellowstone Basin
The high elevation snow pack in the Yellowstone Basin was near to above average
on March 1. The snow pack in the Upper Yellowstone Basin was 118 percent
of average. The snow packs in the Wind, Bighorn, and Shoshone Basins were 110,
101, and 115 percent of average, respectively. The snow packs in the Tongue
and Powder basins were 83 and 95 percent of average, respectively.
Precipitation during February was above average. The upper Yellowstone
River Basin received 286 percent of average precipitation while the
Lower Yellowstone River Basin reported 290 percent of average. The
Bighorn Basin received 137 percent of average precipitation while the
Wind River Basin received 109 percent of average. The Little Bighorn -
Upper Tongue Basin received 97 percent of average and the Powder River
had 129 percent of average precipitation.
February 2019 Yellowstone Mean Precip Oct-Feb WY2019 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
99 percent of average. Flow in the Tongue Basin is expected to be
90 percent of average. Flows in the Powder River are expected
to be about 96 percent of average.
Monthend storage at Boysen Reservoir was 108 percent of average.
Stored water in Buffalo Bill Reservoir was 126 percent of average.
Monthend storage was 99 percent of average at Bighorn Reservoir.
Yellowstone March 1, 2019 Spring and Summer Streamflow Forecasts
Platte Basin
The high elevation snow pack in the Upper North Platte Basin was
106 percent of average on March 1. The snow pack in the North Platte
Basin below Seminoe Reservoir was 104 percent of average. The snow
pack in the South Platte Basin was 108 percent of average.
Precipitation during February in the Upper North Platte Basin was 110
percent of average. In the Lower North Platte Basin, precipitation
was 70 percent of average. The North Platte Plains below Guernsey
Reservoir had 42 percent. The South Platte Mountains had 117
percent whereas the Plains had 135 percent of average February
precipitation.
February 2019 Platte Mean Precip Oct-Feb WY2019 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 94 percent of average. Streams in the South Platte
Basin above South Platte, Colorado can expect 96 percent
of average flow. For the remainder of the South Platte
basin, flows are expected near 88 percent.
Stored water in the South Platte Basin was 102 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
0845 CST MONDAY MARCH 04 2019
DATA CURRENT AS OF: MARCH 01 2019
MISSOURI/YELLOWSTONE/PLATTE RIVER BASIN FORECASTS
50% % 10% 90% AVG
PERIOD (KAF) AVG (KAF) (KAF) (KAF)
------------------------------------------------------------------
BOYSEN RESERVOIR INFLOW APR-SEP 766 73% 1289 485 1047
SBDW4N
BIGHORN R AT KANE APR-SEP 1207 74% 1951 760 1633
LVEW4N
GREYBULL R NR MEETEETSE APR-SEP 145 62% 253 83 235
MEEW4N
BUFFALO BILL RESERVOIR INFLOW APR-SEP 604 89% 818 484 679
CDYW4N
ST MARY R NR BABB APR-SEP 356 85% 421 296 418
SMYM8N
ST MARY R AT INT BOUNDARY APR-SEP 428 88% 516 351 485
SMBM8N
MILK R NR CUTBANK APR-SEP 26 68% 60 14 39
PDBM8N
MILK R AT EASTERN CROSSING APR-SEP 51 73% 129 27 70
ERNM8N
NORTH PLATTE R NR NORTHGATE APR-SEP 313 102% 514 201 308
NGTC2
ENCAMPMENT R NR ENCAMPMENT APR-SEP 124 84% 177 86 147
ERCW4
ENCAMPMENT R NR ENCAMPMENT APR-SEP 132 85% 186 94 156
ECRW4N
ROCK CK NR ARLINGTON APR-SEP 50 101% 63 38 50
KCRW4
ROCK CK NR ARLINGTON APR-SEP 51 101% 64 39 50
KCRW4N
SEMINOE RESERVOIR INFLOW WY APR-SEP 725 88% 1158 476 826
SETW4
SEMINOE RESERVOIR INFLOW WY APR-SEP 877 89% 1309 617 981
SETW4N
LARAMIE R NR WOODS APR-SEP 50 69% 109 22 73
WODW4
LARAMIE R NR WOODS APR-SEP 85 79% 145 55 108
WODW4N
LITTLE LARAMIE R NR FILMORE APR-SEP 51 95% 78 38 54
SMTW4
LITTLE LARAMIE R NR FILMORE APR-SEP 53 95% 80 40 56
SMTW4N
ANTERO RESERVOIR INFLOW APR-SEP 15 92% 23 10 16
ANRC2N
SPINNEY MOUNTAIN RES INFLOW APR-SEP 53 103% 90 33 51
SPYC2N
ELEVENMILE CANYON RES INFLOW APR-SEP 59 104% 97 37 56
EVNC2N
CHEESMAN LAKE INFLOW APR-SEP 96 91% 174 67 105
CHEC2N
SOUTH PLATTE R AT SOUTH PLATTE APR-SEP 181 96% 305 129 188
SPTC2N
BEAR CK AT MORRISON APR-SEP 14 78% 34 8 18
MRRC2N
CLEAR CK AT GOLDEN APR-SEP 92 75% 142 70 124
GLDC2N
ST VRAIN CK AT LYONS APR-SEP 81 89% 124 63 91
LNSC2N
BOULDER CK NR ORODELL APR-SEP 51 103% 74 40 50
OROC2N
S BOULDER CK NR ELDORADO SPR APR-SEP 26 70% 43 15 38
BELC2N
CACHE LA POUDRE AT CANYON MOUTH APR-SEP 186 93% 323 123 201
FTDC2N
LIMA RESERVOIR INFLOW APR-SEP 65 109% 100 38 60
LRRM8N
CLARK CANYON RESERVOIR INFLOW APR-SEP 143 105% 224 106 137
CLKM8N
BEAVERHEAD R AT BARRETTS APR-SEP 167 98% 252 128 170
BARM8N
RUBY R RESERVOIR INFLOW APR-SEP 86 100% 108 64 86
ALRM8N
BIG HOLE R NR MELROSE APR-SEP 519 103% 779 384 504
MLRM8
BIG HOLE R NR MELROSE APR-SEP 577 103% 836 440 561
MLRM8N
HEBGEN RESERVOIR INFLOW APR-SEP 488 124% 561 418 393
HBDM8N
ENNIS RESERVOIR INFLOW APR-SEP 856 122% 998 719 699
ELMM8N
GALLATIN R NR GATEWAY APR-SEP 346 75% 439 277 460
GLGM8
GALLATIN R NR GATEWAY APR-SEP 346 75% 439 277 460
GLGM8N
GALLATIN R AT LOGAN APR-SEP 326 72% 483 236 454
LOGM8
GALLATIN R AT LOGAN APR-SEP 466 81% 604 369 575
LOGM8N
MISSOURI R AT TOSTON APR-SEP 2469 97% 3362 102 2556
TOSM8N
MISSOURI R AT FORT BENTON APR-SEP 3857 100% 5427 161 3866
FBNM8N
MISSOURI R NR VIRGELLE APR-SEP 4501 104% 6189 566 4348
VRGM8N
MISSOURI R NR LANDUSKY APR-SEP 4912 108% 6659 810 4534
LDKM8N
MISSOURI R BLW FT PECK DAM APR-SEP 5220 108% 6999 60 4817
FPKM8N
GIBSON RESERVOIR INFLOW APR-SEP 287 82% 449 218 350
AGSM8N
MARIAS R NR SHELBY APR-SEP 311 73% 512 236 428
SHLM8N
MUSSELSHELL R AT HARLOWTON APR-SEP 81 74% 145 53 110
HLWM8N
YELLOWSTONE R AT YELLOWSTONE LK APR-SEP 746 114% 914 633 657
YLOW4APR
YELLOWSTONE R AT YELLOWSTONE LK APR-SEP 932 113% 1119 800 824
YLOW4N
YELLOWSTONE R AT CORWIN SPRINGS APR-SEP 1730 103% 2089 475 1673
CORM8
YELLOWSTONE R AT CORWIN SPRINGS APR-SEP 2037 107% 2394 729 1912
CORM8N
YELLOWSTONE R AT LIVINGSTON APR-SEP 2038 106% 2453 730 1913
LIVM8
YELLOWSTONE R AT LIVINGSTON APR-SEP 2403 109% 2828 32 2208
LIVM8N
YELLOWSTONE R AT BILLINGS APR-SEP 3459 105% 4244 808 3303
BILM8
YELLOWSTONE R AT BILLINGS APR-SEP 4485 104% 5202 766 4314
BILM8N
YELLOWSTONE R AT MILES CITY APR-SEP 6825 96% 8736 610 7110
MILM8N
YELLOWSTONE R AT SIDNEY APR-SEP 7189 98% 9123 889 7332
SIDM8N
BOULDER R AT BIG TIMBER APR-SEP 257 94% 306 198 273
BTMM8
BOULDER R AT BIG TIMBER APR-SEP 299 95% 347 238 314
BTMM8N
STILLWATER R NR ABSAROKEE APR-SEP 459 93% 548 388 495
SRAM8
STILLWATER R NR ABSAROKEE APR-SEP 518 94% 606 447 552
SRAM8N
CLARKS FK YELWSTONE R NR BELFRY APR-SEP 477 97% 600 387 490
BFYM4
CLARKS FK YELWSTONE R NR BELFRY APR-SEP 548 97% 669 461 563
BFYM4N
BIGHORN R NR ST XAVIER APR-SEP 1947 82% 2872 400 2383
STXM8N
LITTLE BIGHORN R NR HARDIN APR-SEP 116 112% 166 72 104
HRDM8N
TONGUE R NR DAYTON APR-SEP 81 99% 109 55 82
DAYW4N
TONGUE R NR DECKER APR-SEP 184 84% 278 123 220
DSLM8N
TONGUE R RESERVOIR INFLOW APR-SEP 186 84% 288 124 222
DKRM8N
POWDER R NR LOCATE APR-SEP 188 95% 349 112 198
MHDM8
POWDER R NR LOCATE APR-SEP 212 97% 424 122 219
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 VOLUME AS SIMULATED BY THE
RIVER FORECAST MODEL CONSIDERING A CONTINUOUS SIMULATION OF THE
BASIN RESPONSE TO HISTORIC CLIMATE DATA (OBSERVED PRECIPITATION
AND TEMPERATURES) OVER THE PERIOD OF 1981-2010
THE 50%, 10% AND 90% COLUMNS INDICATE THE PROBABILITY THAT THE
ACTUAL VOLUME WILL EXCEED THE FORECAST FOR THE VALID TIME PERIOD
FOR MORE INFORMATION, PLEASE VISIT: WWW.WEATHER.GOV/MBRFC/WATER
