March 1, 2018 Spring and Summer Streamflow Forecasts
Missouri River Basin Mountain Snowpack as of March 1, 2018
Upper Missouri Basin
THE HIGH ELEVATION SNOW PACK IN THE UPPER MISSOURI BASIN AS OF
MARCH 1 WAS ABOVE AVERAGE. THE SNOW PACK ABOVE FORT PECK,
MONTANA WAS 150 PERCENT. THE SNOW PACK IN THE ST MARY BASIN WAS 135
PERCENT, AND THE MILK RIVER BASIN WAS 129 PERCENT.
FEBRUARY PRECIPITATION ACROSS THE UPPER MISSOURI BASIN WAS
ABOVE AVERAGE. BASIN PRECIPITATION SUMMARIES FOR THE
MISSOURI BASIN INCLUDE: MILK ST. MARY, 287 PERCENT; MILK CANADA,
460 PERCENT; LOWER MILK, 365 PERCENT; ABOVE TOSTON, 146 PERCENT;
TOSTON TO FT. PECK, 446 PERCENT.
February 2018 Upper Missouri Mean Precip Oct-Feb WY2018 Upper Missouri Mean Precip
STREAM FLOW IN THE UPPER MISSOURI BASIN IS FORECAST TO BE
ABOVE AVERAGE DURING THE UPCOMING SPRING AND SUMMER. THE ST.
MARY RIVER IS FORECAST TO HAVE 101 PERCENT OF AVERAGE APRIL-SEPTEMBER
FLOWS. RUNOFF IS EXPECTED TO RANGE AROUND 122 PERCENT OF AVERAGE
FOR THE MISSOURI BASIN ABOVE FORT PECK, MONTANA.
Upper Missouri March 1, 2018 Spring and Summer Streamflow Forecasts
OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA: LIMA RESERVOIR
HAD 180 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 120 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 29 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 84 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; 93 AND 117 PERCENT OF AVERAGE WATER, RESPECTIVELY.
Yellowstone Basin
THE HIGH ELEVATION SNOW PACK IN THE YELLOWSTONE BASIN WAS ABOVE
AVERAGE ON MARCH 1. THE SNOW PACK IN THE UPPER YELLOWSTONE BASIN WAS
165 PERCENT OF AVERAGE. THE SNOW PACKS IN THE WIND, BIGHORN, AND
SHOSHONE BASINS WERE 123, 147, AND 157 PERCENT OF AVERAGE,
RESPECTIVELY. THE SNOW PACKS IN THE TONGUE AND POWDER BASINS WERE
116 AND 131 PERCENT OF AVERAGE, RESPECTIVELY.
PRECIPITATION DURING FEBRUARY WAS ABOVE AVERAGE. THE UPPER
YELLOWSTONE RIVER BASIN RECEIVED 250 PERCENT OF AVERAGE PRECIPITATION
WHILE THE LOWER YELLOWSTONE BASIN REPORTED 375 PERCENT OF AVERAGE.
THE BIGHORN BASIN RECEIVED 225 PERCENT OF AVERAGE PRECIPITATION
WHILE THE WIND RIVER BASIN RECEIVED 159 PERCENT OF AVERAGE.
THE LITTLE BIGHORN - UPPER TONGUE BASIN RECEIVED 273 PERCENT OF
AVERAGE AND THE POWDER RIVER HAD 306 PERCENT OF AVERAGE PRECIPITATION.
February 2018 Yellowstone Mean Precip Oct-Feb WY2018 Yellowstone Mean Precip
FORECAST STREAM FLOW IN THE YELLOWSTONE BASIN IS ABOVE AVERAGE
FOR THE UPCOMING SPRING AND SUMMER. STREAM FLOW FOR THE BIGHORN
RIVER AT ST. XAVIER, MONTANA ISFORECAST TO BE ABOUT 137 PERCENT
OF AVERAGE. FLOW IN THE TONGUE BASIN IS EXPECTED TO BE 96 PERCENT
OF AVERAGE. FLOWS IN THE POWDER RIVER ARE EXPECTED TO BE ABOUT 110
PERCENT OF AVERAGE.
MONTHEND STORAGE AT BOYSEN RESERVOIR WAS 116 PERCENT OF AVERAGE.
STORED WATER IN BUFFALO BILL RESERVOIR WAS 133 PERCENT OF AVERAGE.
MONTHEND STORAGE WAS 97 PERCENT OF AVERAGE AT BIGHORN RESERVOIR.
Yellowstone March 1, 2018 Spring and Summer Streamflow Forecasts
Platte Basin
THE HIGH ELEVATION SNOW PACK IN THE UPPER NORTH PLATTE BASIN WAS
91 PERCENT OF AVERAGE ON MARCH 1. THE SNOW PACK IN THE NORTH
PLATTE BASIN BELOW SEMINOE RESERVOIR WAS 72 PERCENT OF AVERAGE.
THE SNOW PACK IN THE SOUTH PLATTE BASIN WAS 87 PERCENT OF AVERAGE.
PRECIPITATION DURING FEBRUARY IN THE UPPER NORTH PLATTE
BASIN WAS 89 PERCENT OF AVERAGE. IN THE LOWER NORTH PLATTE BASIN
PRECIPITATION WAS 91 PERCENT OF AVERAGE. THE NORTH PLATTE PLAINS
BELOW GUERNSY RESERVOIR HAD 139 PERCENT. THE SOUTH PLATTE MOUNTAINS
HAD 106 PERCENT WHEREAS THE PLAINS HAD 134 PERCENT OF AVERAGE
FEBRUARY PRECIPITATION.
February 2018 Platte Mean Precip Oct-Feb WY2018 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
87 PERCENT OF AVERAGE. STREAMS IN THE SOUTH PLATTE BASIN
ABOVE SOUTH PLATTE, COLORADO CAN EXPECT 50 PERCENT OF AVERAGE
FLOW. FOR THE REMAINDER OF THE SOUTH PLATTE BASIN FLOWS ARE
EXPECTED NEAR 65 PERCENT OF AVERAGE.
STORED WATER IN THE SOUTH PLATTE BASIN WAS 110 PERCENT OF AVERAGE
ON MARCH 1.
North Platte Streamflow Fcst South Platte Streamflow Fcst
000
FGUS63 KKRF 062114
ESPKRF
WATER SUPPLY FORECAST
NWS MISSOURI BASIN RIVER FORECAST CENTER
PLEASANT HILL MISSOURI
1500 CST TUESDAY MARCH 06 2018
DATA CURRENT AS OF: MARCH 05 2018
MISSOURI/YELLOWSTONE/PLATTE RIVER BASIN FORECASTS
50% % 10% 90% AVG
FORECAST POINT PERIOD (KAF) AVG (KAF) (KAF) (KAF)
---------------------------------------------------------------------
BOYSEN RESERVOIR INFLOW APR-SEP 1521 140% 2029 1233 1085
SBDW4N
BIGHORN R AT KANE APR-SEP 2328 132% 3053 1847 1764
LVEW4N
GREYBULL R NR MEETEETSE APR-SEP 285 100% 421 222 284
MEEW4N
BUFFALO BILL RESERVOIR INFLOW APR-SEP 1019 154% 1193 890 662
CDYW4N
ST MARY R NR BABB APR-SEP 447 102% 526 369 437
SMYM8N
ST MARY R AT INT BOUNDARY APR-SEP 512 101% 634 426 507
SMBM8N
MILK R NR CUTBANK APR-SEP 24 68% 61 15 35
PDBM8N
MILK R AT EASTERN CROSSING APR-SEP 46 74% 131 26 62
ERNM8N
NORTH PLATTE R NR NORTHGATE APR-SEP 219 96% 360 152 227
NGTC2
ENCAMPMENT R NR ENCAMPMENT APR-SEP 104 63% 146 79 166
ERCW4
ENCAMPMENT R NR ENCAMPMENT APR-SEP 113 65% 155 88 175
ECRW4N
ROCK CK NR ARLINGTON APR-SEP 46 102% 58 35 46
KCRW4
ROCK CK NR ARLINGTON APR-SEP 47 101% 58 36 46
KCRW4N
SEMINOE RESERVOIR INFLOW WY APR-SEP 633 85% 911 437 745
SETW4
SEMINOE RESERVOIR INFLOW WY APR-SEP 777 86% 1065 578 899
SETW4N
LARAMIE R NR WOODS APR-SEP 56 91% 97 29 61
WODW4
LARAMIE R NR WOODS APR-SEP 91 94% 133 62 97
WODW4N
LITTLE LARAMIE R NR FILMORE APR-SEP 67 133% 95 53 50
SMTW4
LITTLE LARAMIE R NR FILMORE APR-SEP 69 132% 97 55 53
SMTW4N
ANTERO RESERVOIR INFLOW APR-SEP 7 43% 14 3 16
ANRC2N
SPINNEY MOUNTAIN RES INFLOW APR-SEP 24 41% 50 15 59
SPYC2N
ELEVENMILE CANYON RES INFLOW APR-SEP 25 39% 57 16 65
EVNC2N
CHEESMAN LAKE INFLOW APR-SEP 50 40% 105 30 123
CHEC2N
SOUTH PLATTE R AT SOUTH PLATTE APR-SEP 95 46% 213 57 209
SPTC2N
BEAR CK AT MORRISON APR-SEP 9 49% 32 5 19
MRRC2N
CLEAR CK AT GOLDEN APR-SEP 74 67% 132 48 110
GLDC2N
ST VRAIN CK AT LYONS APR-SEP 62 65% 98 38 96
LNSC2N
BOULDER CK NR ORODELL APR-SEP 36 66% 72 23 54
OROC2N
S BOULDER CK NR ELDORADO SPR APR-SEP 23 61% 40 14 38
BELC2N
CACHE LA POUDRE AT CANYON MOUTH APR-SEP 151 74% 240 96 205
FTDC2N
LIMA RESERVOIR INFLOW APR-SEP 41 62% 69 18 66
LRRM8N
CLARK CANYON RESERVOIR INFLOW APR-SEP 106 60% 204 66 177
CLKM8N
BEAVERHEAD R AT BARRETTS APR-SEP 138 65% 245 97 210
BARM8N
RUBY R RESERVOIR INFLOW APR-SEP 98 109% 122 74 90
ALRM8N
BIG HOLE R NR MELROSE APR-SEP 730 139% 1056 570 525
MLRM8
BIG HOLE R NR MELROSE APR-SEP 787 135% 1113 630 583
MLRM8N
HEBGEN RESERVOIR INFLOW APR-SEP 536 129% 616 487 415
HBDM8N
ENNIS RESERVOIR INFLOW APR-SEP 886 121% 1049 791 732
ELMM8N
GALLATIN R NR GATEWAY APR-SEP 533 115% 665 414 464
GLGM8
GALLATIN R NR GATEWAY APR-SEP 533 121% 665 414 442
GLGM8N
GALLATIN R AT LOGAN APR-SEP 567 126% 778 393 451
LOGM8
GALLATIN R AT LOGAN APR-SEP 713 122% 906 541 583
LOGM8N
MISSOURI R AT TOSTON APR-SEP 3085 127% 4161 2581 2430
TOSM8N
MISSOURI R AT FORT BENTON APR-SEP 4600 117% 6382 3913 3921
FBNM8N
MISSOURI R NR VIRGELLE APR-SEP 5222 121% 7127 4379 4324
VRGM8N
MISSOURI R NR LANDUSKY APR-SEP 5508 122% 7534 4665 4512
LDKM8N
MISSOURI R BLW FT PECK DAM APR-SEP 5792 123% 7939 4942 4706
FPKM8N
GIBSON RESERVOIR INFLOW APR-SEP 638 175% 819 550 365
AGSM8N
MARIAS R NR SHELBY APR-SEP 339 112% 507 267 303
SHLM8N
MUSSELSHELL R AT HARLOWTON APR-SEP 78 101% 157 41 77
HLWM8N
YELLOWSTONE R AT YELLOWSTONE LK APR-SEP 1136 165% 1275 1044 689
YLOW4APR
YELLOWSTONE R AT YELLOWSTONE LK APR-SEP 1355 156% 1516 1245 868
YLOW4N
YELLOWSTONE R AT CORWIN SPRINGS APR-SEP 2800 164% 3100 2530 1712
CORM8
YELLOWSTONE R AT CORWIN SPRINGS APR-SEP 3138 158% 3456 2844 1989
CORM8N
YELLOWSTONE R AT LIVINGSTON APR-SEP 3180 159% 3539 2849 2000
LIVM8
YELLOWSTONE R AT LIVINGSTON APR-SEP 3577 151% 3936 3227 2368
LIVM8N
YELLOWSTONE R AT BILLINGS APR-SEP 5494 160% 6332 4796 3423
BILM8
YELLOWSTONE R AT BILLINGS APR-SEP 6673 149% 7465 5922 4464
BILM8N
YELLOWSTONE R AT MILES CITY APR-SEP 11224 147% 13179 9888 7610
MILM8N
YELLOWSTONE R AT SIDNEY APR-SEP 11719 146% 13864 10261 8022
SIDM8N
BOULDER R AT BIG TIMBER APR-SEP 334 139% 393 274 240
BTMM8
BOULDER R AT BIG TIMBER APR-SEP 442 129% 499 380 343
BTMM8N
STILLWATER R NR ABSAROKEE APR-SEP 694 130% 785 626 532
SRAM8
STILLWATER R NR ABSAROKEE APR-SEP 756 128% 843 684 590
SRAM8N
CLARKS FK YELWSTONE R NR BELFRY APR-SEP 1004 193% 1118 921 520
BFYM4
CLARKS FK YELWSTONE R NR BELFRY APR-SEP 1078 183% 1189 993 591
BFYM4N
BIGHORN R NR ST XAVIER APR-SEP 3396 137% 4223 2848 2480
STXM8N
LITTLE BIGHORN R NR HARDIN APR-SEP 147 144% 189 99 102
HRDM8N
TONGUE R NR DAYTON APR-SEP 92 96% 113 66 96
DAYW4N
TONGUE R NR DECKER APR-SEP 213 94% 281 156 228
DSLM8N
TONGUE R RESERVOIR INFLOW APR-SEP 226 99% 289 166 228
DKRM8N
POWDER R NR LOCATE APR-SEP 300 106% 491 201 282
MHDM8
POWDER R NR LOCATE APR-SEP 396 125% 628 277 317
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
