Water Resources Data System & State Climate Office

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of MONDAY: AUGUST 28 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .0 .0 * 47.0 30.2 156 Black Bear 8170 .1 .0 * 67.2 52.6 128 Blind Bull Sum 8650 .0 .0 * 43.2 28.9 149 Cottonwood Creek 7670 .0 .0 * 49.4 36.7 135 East Rim Divide 7930 .2 .0 * 26.6 18.5 144 Grand Targhee 9260 .0 .0 * 59.4 45.4 131 Granite Creek 6770 .0 .0 * 44.3 28.0 158 Grassy Lake 7265 .1 .0 * 68.0 49.6 137 Gros Ventre Summit 8750 .1 .0 * 31.9 21.5 148 Gunsight Pass 9820 .0 .0 * 35.2 23.4 150 Lewis Lake Divide 7850 .1 .0 * 68.8 48.4 142 Phillips Bench 8200 .0 .0 * 56.3 39.3 143 Salt River Summit 7760 -M .0 * -M 24.9 * Snake River Station 6920 .0 .0 * 44.2 33.1 134 Spring Creek Divide 9000 .1 .0 * 48.5 33.7 144 Thumb Divide 7980 .0 .0 * 34.9 28.2 124 Togwotee Pass 9580 .0 .0 * 50.4 36.3 139 Two Ocean Plateau 9240 -M .0 * -M 40.8 * Willow Creek 8380 .0 .0 * 62.8 49.0 128 Younts Peak 8350 .0 .0 * 41.1 26.8 153 ----- ----- Basin Index (%) * 140 MADISON-GALLATIN Black Bear 8170 .1 .0 * 67.2 52.6 128 Canyon 7870 .0 .0 * 32.8 26.1 126 Madison Plateau 7750 .0 .0 * 45.6 38.6 118 West Yellowstone 6700 .1 .0 * 30.4 22.7 134 Whiskey Creek 6800 .0 .0 * 35.5 31.0 115 ----- ----- Basin Index (%) * 124 YELLOWSTONE Beartooth Lake 9360 .0 .0 * 39.2 31.1 126 Burnt Mtn 5880 .0 .0 * 27.6 27.5 100 Canyon 7870 .0 .0 * 32.8 26.1 126 Cole Creek 7850 .0 .0 * 22.4 28.4 79 Evening Star 9200 .0 .0 * 57.1 42.2 135 Fisher Creek 9100 .0 .0 * 61.5 48.8 126 Northeast Entrance 7350 .0 .0 * 29.1 23.1 126 Parker Peak 9400 .0 .0 * 49.0 29.8 164 Sylvan Lake 8420 .0 .0 * 48.7 35.7 136 Thumb Divide 7980 .0 .0 * 34.9 28.2 124 Two Ocean Plateau 9240 -M .0 * -M 40.8 * White Mill 8700 .1 .0 * 48.1 38.1 126 Wolverine 7650 -M .0 * 30.4 21.7 140 ----- ----- Basin Index (%) * 126 WIND RIVER Burroughs Creek 8750 .0 -M * 34.7 -M * Castle Creek 8400 .3 -M * 23.8 -M * Cold Springs 9630 .0 .0 * 29.0 19.9 146 Deer Park 9700 .0 .0 * 51.5 32.7 157 Hobbs Park 10100 .1 .0 * 41.2 25.7 160 Kirwin 9550 .0 .0 * 35.9 23.8 151 Little Warm 9370 .0 .0 * 32.4 23.6 137 Owl Creek 8975 .0 .0 * 22.8 15.5 147 South Pass 9040 .0 .0 * 41.2 27.8 148 St. Lawrence Alt 8620 .0 .0 * 26.2 18.8 139 Togwotee Pass 9580 .0 .0 * 50.4 36.3 139 Townsend Creek 8700 .4 .0 * 35.3 22.6 156 ----- ----- Basin Index (%) * 148 BIGHORN BASIN Bald Mtn. 9380 .0 .0 * 27.8 29.6 94 Bear Trap Meadow 8200 .0 .0 * 20.9 18.8 111 Bone Springs Div 9350 .0 .0 * 31.4 28.6 110 Grave Springs 8550 .0 .0 * 17.5 21.0 83 Kirwin 9550 .0 .0 * 35.9 23.8 151 Marquette 8760 .0 -M * 30.7 -M * Middle Powder 7760 .1 .0 * 19.1 22.6 85 Owl Creek 8975 .0 .0 * 22.8 15.5 147 Powder River Pass 9480 .0 .0 * 26.7 24.5 109 Shell Creek 9580 .0 .0 * 26.2 25.8 102 Timber Creek 7950 .0 .0 * 22.0 19.0 116 ----- ----- Basin Index (%) * 109 SHOSHONE RIVER Blackwater 9780 .0 .0 * 53.9 33.6 160 Evening Star 9200 .0 .0 * 57.1 42.2 135 Marquette 8760 .0 -M * 30.7 -M * Sylvan Road 7120 .0 .0 * 38.2 26.4 145 Younts Peak 8350 .0 .0 * 41.1 26.8 153 ----- ----- Basin Index (%) * 148 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 20.9 18.8 111 Cloud Peak Reservoir 9860 .2 .0 * 34.6 27.8 124 Grave Springs 8550 .0 .0 * 17.5 21.0 83 Hansen Sawmill 8360 .0 .0 * -M 20.0 * Middle Powder 7760 .1 .0 * 19.1 22.6 85 Powder River Pass 9480 .0 .0 * 26.7 24.5 109 Soldier Park 8720 .0 -M * 28.7 -M * ----- ----- Basin Index (%) * 104 TONGUE RIVER Big Goose 7990 .1 .0 * 25.1 22.3 113 Bone Springs Div 9350 .0 .0 * 31.4 28.6 110 Burgess Junction 7880 .1 .0 * 26.1 23.5 111 Dome Lake 8880 .0 .0 * 30.0 25.8 116 Little Goose 8870 .0 -M * 30.3 -M * Sucker Creek 8880 .0 .0 * 30.5 27.5 111 Tie Creek 6870 .0 .0 * 29.3 24.5 120 ----- ----- Basin Index (%) * 113 BELLE FOURCHE Cole Canyon 5910 .1 .0 * 22.4 23.5 95 ----- ----- Basin Index (%) * 95 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 22.1 25.6 86 North Rapid Creek 6130 .1 .0 * 22.5 25.1 90 ----- ----- Basin Index (%) * 88 UPPER N. PLATTE Arapaho Ridge 10960 -M .0 * -M 35.7 * Blackhall Mtn 9820 .8 -M * 48.0 -M * Columbine 9160 .3 .0 * 38.3 36.0 106 Divide Peak 8880 .0 .0 * 29.6 31.5 94 Joe Wright 10120 .3 .0 * 42.9 41.2 104 Laprele Creek 8375 .0 .0 * 22.9 22.6 101 Med Bow 10500 .1 -M * 49.6 -M * North French Creek 10130 -M .0 * 40.6 40.8 100 Never Summer 10280 -M .0 * 30.0 -M * Old Battle 10000 .2 .0 * 50.7 48.7 104 Rawah 9020 .0 .0 * 25.9 25.0 104 Sage Creek Basin 7850 -M .0 * 21.2 21.2 100 Sand Lake 10050 .0 .0 * 41.1 38.7 106 South Brush Creek 8440 .1 .0 * 18.9 25.3 75 Tower 10500 -M .0 * -M 55.2 * Webber Springs 9250 .4 .0 * 43.1 37.8 114 Willow Creek Pass 9540 .1 .0 * 26.9 24.0 112 Zirkel 9340 .0 .0 * 54.4 40.2 135 ----- ----- Basin Index (%) * 105 SWEETWATER Deer Park 9700 .0 .0 * 51.5 32.7 157 Larsen Creek 9000 .0 .0 * 30.7 -M * South Pass 9040 .0 .0 * 41.2 27.8 148 ----- ----- Basin Index (%) * 153 LOWER N. PLATTE Casper Mtn. 7900 .1 .0 * 25.8 26.1 99 Laprele Creek 8375 .0 .0 * 22.9 22.6 101 Reno Hill 8400 .0 .0 * 25.6 26.9 95 Windy Peak 7900 .0 .0 * 22.2 21.4 104 ----- ----- Basin Index (%) * 99 LARAMIE RIVER Brooklyn Lake 10240 .0 .0 * 32.4 33.5 97 Cinnabar Park 9574 .0 .0 * 33.6 35.6 94 Crow Creek 8330 -M .0 * 19.1 24.0 80 Deadman Hill 10220 .0 .0 * 33.8 29.0 117 Rawah 9020 .0 .0 * 25.9 25.0 104 Roach 9700 .0 .0 * 33.3 31.0 107 ----- ----- Basin Index (%) * 100 S. PLATTE Black Mountain 8920 -M -M * 25.4 -M * Crow Creek 8330 -M .0 * 19.1 24.0 80 Deadman Hill 10220 .0 .0 * 33.8 29.0 117 ----- ----- Basin Index (%) * 100 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.2 22.4 99 Divide Peak 8880 .0 .0 * 29.6 31.5 94 Elk River 8700 .0 .0 * 28.0 30.1 93 Little Snake River 8915 .1 .0 * 49.5 40.7 122 Old Battle 10000 .2 .0 * 50.7 48.7 104 Sage Creek Basin 7850 -M .0 * 21.2 21.2 100 Sandstone RS 8150 .0 .0 * 22.6 27.2 83 Whiskey Park 8950 .0 .0 * 39.5 39.5 100 ----- ----- Basin Index (%) * 101 UPPER GREEN RIVER Big Sandy Opening 9080 .0 .0 * 29.9 22.1 135 Blind Bull Sum 8650 .0 .0 * 43.2 28.9 149 East Rim Divide 7930 .2 .0 * 26.6 18.5 144 Elkhart Park G.S. 9400 .1 .0 * 31.3 22.3 140 Gros Ventre Summit 8750 .1 .0 * 31.9 21.5 148 Gunsight Pass 9820 .0 .0 * 35.2 23.4 150 Kendall R.S. 7740 .1 .0 * 36.9 21.3 173 Loomis Park 8240 .1 .0 * 39.9 25.8 155 New Fork Lake 8340 .0 .0 * 26.9 18.5 145 Pocket Creek 9360 .0 -M * 28.9 -M * Snider Basin 8060 .0 .0 * 31.6 20.5 154 Spring Creek Divide 9000 .1 .0 * 48.5 33.7 144 Triple Peak 8500 .0 .0 * 50.0 36.4 137 ----- ----- Basin Index (%) * 147 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 22.6 -M * Buck Pasture 9632 .0 -M * 32.8 -M * EF Blacks Fork GS 9360 .0 -M * 28.5 -M * Hams Fork 7840 .0 .0 * 27.2 18.5 147 Hewinta 9500 .0 .0 * 26.1 23.9 109 Hickerson Park 9122 .0 .0 * 21.8 19.7 111 Hole-in-Rock 9168 .0 .0 * 23.5 19.2 122 Indian Creek 9425 .1 .0 * 48.9 32.0 153 Kelley R.S. 8180 .1 .0 * 38.8 26.4 147 Spirit Lk 10235 .0 -M * 30.5 -M * Steel Creek Park 10158 .0 .0 * 32.2 27.7 116 ----- ----- Basin Index (%) * 131 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 24.1 -M * Bug Lake 7987 .0 .0 * 42.0 27.8 151 Burts Miller Ranch 8000 .0 -M * 13.5 -M * Chalk Creek #1 9171 .0 .0 * 46.2 37.4 124 Hayden Fork 9130 .0 .0 * 36.8 31.7 116 Kelley R.S. 8180 .1 .0 * 38.8 26.4 147 Lily Lake 9133 .0 .0 * 28.5 27.1 105 Monte Cristo 8932 .0 .0 * 50.3 36.9 136 Salt River Summit 7760 -M .0 * -M 24.9 * ----- ----- Basin Index (%) * 130 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.