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 WEDNESDAY: SEPTEMBER 13 , 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 * -M 31.0 * Black Bear 8170 .1 .0 * 67.2 53.6 125 Blind Bull Sum 8650 .0 .0 * 43.8 29.8 147 Cottonwood Creek 7670 .0 .0 * 50.1 37.7 133 East Rim Divide 7930 .3 .0 * 26.8 19.2 140 Grand Targhee 9260 .0 .0 * 59.5 46.9 127 Granite Creek 6770 .0 .0 * 44.4 28.8 154 Grassy Lake 7265 .1 .0 * 67.9 50.8 134 Gros Ventre Summit 8750 .1 .0 * 32.3 22.5 144 Gunsight Pass 9820 .0 .0 * 35.6 24.8 144 Lewis Lake Divide 7850 .1 .0 * 68.7 49.4 139 Phillips Bench 8200 .0 .0 * 56.4 40.2 140 Salt River Summit 7760 .1 .0 * 34.0 25.8 132 Snake River Station 6920 .0 .0 * 44.2 34.0 130 Spring Creek Divide 9000 .2 .0 * 49.0 34.6 142 Thumb Divide 7980 .0 .0 * 35.0 28.9 121 Togwotee Pass 9580 .0 .0 * 50.5 37.4 135 Two Ocean Plateau 9240 -M .0 * -M 41.9 * Willow Creek 8380 .0 .0 * 63.2 50.2 126 Younts Peak 8350 .0 .0 * 41.9 28.0 150 ----- ----- Basin Index (%) * 135 MADISON-GALLATIN Black Bear 8170 .1 .0 * 67.2 53.6 125 Canyon 7870 .0 .0 * 32.8 26.8 122 Madison Plateau 7750 .0 .0 * 45.6 39.5 115 West Yellowstone 6700 .0 .0 * 30.3 23.3 130 Whiskey Creek 6800 .0 .0 * 35.7 31.9 112 ----- ----- Basin Index (%) * 121 YELLOWSTONE Beartooth Lake 9360 .0 .0 * 39.7 31.9 124 Burnt Mtn 5880 .0 .0 * 27.5 28.4 97 Canyon 7870 .0 .0 * 32.8 26.8 122 Cole Creek 7850 .0 .0 * 22.8 29.5 77 Evening Star 9200 .0 .0 * 57.1 43.4 132 Fisher Creek 9100 .0 .0 * 61.3 50.1 122 Northeast Entrance 7350 .0 .0 * 29.2 23.9 122 Parker Peak 9400 .0 .0 * 49.1 30.6 160 Sylvan Lake 8420 .0 .0 * 49.1 36.8 133 Thumb Divide 7980 .0 .0 * 35.0 28.9 121 Two Ocean Plateau 9240 -M .0 * -M 41.9 * White Mill 8700 .1 .0 * 47.9 39.2 122 Wolverine 7650 -M .0 * 30.4 22.4 136 ----- ----- Basin Index (%) * 123 WIND RIVER Burroughs Creek 8750 .0 -M * 34.3 -M * Castle Creek 8400 .0 -M * 24.0 -M * Cold Springs 9630 .0 .0 * 28.7 20.7 139 Deer Park 9700 .0 .0 * 51.4 33.6 153 Hobbs Park 10100 .1 .0 * 41.7 26.4 158 Kirwin 9550 .0 .0 * 35.9 24.9 144 Little Warm 9370 .0 .0 * 32.5 24.7 132 Owl Creek 8975 .0 .0 * 23.3 16.3 143 South Pass 9040 .0 .0 * 41.0 28.4 144 St. Lawrence Alt 8620 .0 .0 * 26.3 19.3 136 Togwotee Pass 9580 .0 .0 * 50.5 37.4 135 Townsend Creek 8700 .1 .0 * 35.5 23.2 153 ----- ----- Basin Index (%) * 144 BIGHORN BASIN Bald Mtn. 9380 .0 .0 * 27.8 30.6 91 Bear Trap Meadow 8200 -M .0 * -M 19.6 * Bone Springs Div 9350 .0 .0 * 31.5 29.7 106 Grave Springs 8550 .0 .0 * 17.3 21.7 80 Kirwin 9550 .0 .0 * 35.9 24.9 144 Marquette 8760 .0 -M * 30.9 -M * Middle Powder 7760 .1 .0 * 18.9 23.4 81 Owl Creek 8975 .0 .0 * 23.3 16.3 143 Powder River Pass 9480 .0 .0 * -M 25.4 * Shell Creek 9580 .0 .0 * 26.8 26.8 100 Timber Creek 7950 .0 .0 * 22.3 20.0 112 ----- ----- Basin Index (%) * 105 SHOSHONE RIVER Blackwater 9780 .1 .0 * 54.0 34.9 155 Evening Star 9200 .0 .0 * 57.1 43.4 132 Marquette 8760 .0 -M * 30.9 -M * Sylvan Road 7120 .0 .0 * 38.4 27.4 140 Younts Peak 8350 .0 .0 * 41.9 28.0 150 ----- ----- Basin Index (%) * 143 POWDER RIVER Bear Trap Meadow 8200 -M .0 * -M 19.6 * Cloud Peak Reservoir 9860 .0 .0 * 34.8 28.9 120 Grave Springs 8550 .0 .0 * 17.3 21.7 80 Hansen Sawmill 8360 .0 .0 * -M 20.8 * Middle Powder 7760 .1 .0 * 18.9 23.4 81 Powder River Pass 9480 .0 .0 * -M 25.4 * Soldier Park 8720 .0 -M * 28.7 -M * ----- ----- Basin Index (%) * 96* TONGUE RIVER Big Goose 7990 .0 .0 * 25.1 23.5 107 Bone Springs Div 9350 .0 .0 * 31.5 29.7 106 Burgess Junction 7880 .0 .0 * 26.7 24.2 110 Dome Lake 8880 .0 .0 * 30.2 26.8 113 Little Goose 8870 .0 -M * 30.5 -M * Sucker Creek 8880 .0 .0 * 30.5 28.3 108 Tie Creek 6870 .0 .0 * 29.5 25.4 116 ----- ----- Basin Index (%) * 110 BELLE FOURCHE Cole Canyon 5910 .2 .0 * 22.7 24.4 93 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 23.0 26.6 86 North Rapid Creek 6130 .1 .0 * 22.9 26.1 88 ----- ----- Basin Index (%) * 87 UPPER N. PLATTE Arapaho Ridge 10960 -M .0 * -M 36.6 * Blackhall Mtn 9820 .7 -M * 48.4 -M * Columbine 9160 .4 .0 * 38.6 36.8 105 Divide Peak 8880 .0 .0 * 29.5 32.4 91 Joe Wright 10120 .4 .0 * 43.1 42.3 102 Laprele Creek 8375 .0 .0 * 22.8 23.3 98 Med Bow 10500 .2 -M * 51.3 -M * North French Creek 10130 -M .0 * 41.6 41.7 100 Never Summer 10280 -M .0 * 30.4 -M * Old Battle 10000 .2 .0 * 50.7 50.0 101 Rawah 9020 .1 .0 * -M 25.8 * Sage Creek Basin 7850 -M .0 * 21.2 22.1 96 Sand Lake 10050 .1 .0 * 41.4 39.5 105 South Brush Creek 8440 .1 .0 * 19.2 26.2 73 Tower 10500 -M .0 * -M 56.4 * Webber Springs 9250 .5 .0 * 43.6 38.9 112 Willow Creek Pass 9540 .1 .0 * 27.2 24.8 110 Zirkel 9340 .0 .0 * 54.5 41.2 132 ----- ----- Basin Index (%) * 103 SWEETWATER Deer Park 9700 .0 .0 * 51.4 33.6 153 Larsen Creek 9000 .0 .0 * 30.9 -M * South Pass 9040 .0 .0 * 41.0 28.4 144 ----- ----- Basin Index (%) * 149 LOWER N. PLATTE Casper Mtn. 7900 .0 .0 * 25.7 26.8 96 Laprele Creek 8375 .0 .0 * 22.8 23.3 98 Reno Hill 8400 .0 .0 * 25.7 27.6 93 Windy Peak 7900 .0 .0 * 22.2 22.0 101 ----- ----- Basin Index (%) * 97 LARAMIE RIVER Brooklyn Lake 10240 .0 .0 * 32.6 34.1 96 Cinnabar Park 9574 .0 .0 * 34.2 36.4 94 Crow Creek 8330 -M .0 * 19.9 24.7 81 Deadman Hill 10220 .0 .0 * 34.3 29.8 115 Rawah 9020 .1 .0 * -M 25.8 * Roach 9700 .0 .0 * 33.9 31.9 106 ----- ----- Basin Index (%) * 99 S. PLATTE Black Mountain 8920 -M -M * 25.7 -M * Crow Creek 8330 -M .0 * 19.9 24.7 81 Deadman Hill 10220 .0 .0 * 34.3 29.8 115 ----- ----- Basin Index (%) * 99 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.1 23.2 95 Divide Peak 8880 .0 .0 * 29.5 32.4 91 Elk River 8700 .0 .0 * 28.1 31.1 90 Little Snake River 8915 .1 .0 * 49.8 41.8 119 Old Battle 10000 .2 .0 * 50.7 50.0 101 Sage Creek Basin 7850 -M .0 * 21.2 22.1 96 Sandstone RS 8150 .1 .0 * 22.7 28.2 80 Whiskey Park 8950 .1 .0 * 40.0 40.3 99 ----- ----- Basin Index (%) * 98 UPPER GREEN RIVER Big Sandy Opening 9080 .0 .0 * 30.4 23.0 132 Blind Bull Sum 8650 .0 .0 * 43.8 29.8 147 East Rim Divide 7930 .3 .0 * 26.8 19.2 140 Elkhart Park G.S. 9400 .1 .0 * 31.6 23.5 134 Gros Ventre Summit 8750 .1 .0 * 32.3 22.5 144 Gunsight Pass 9820 .0 .0 * 35.6 24.8 144 Kendall R.S. 7740 .1 .0 * 37.1 22.1 168 Loomis Park 8240 .1 .0 * 40.0 26.7 150 New Fork Lake 8340 .0 .0 * 26.3 19.4 136 Pocket Creek 9360 .0 -M * 29.5 -M * Snider Basin 8060 .0 .0 * 31.9 21.2 150 Spring Creek Divide 9000 .2 .0 * 49.0 34.6 142 Triple Peak 8500 .0 .0 * 50.4 37.1 136 ----- ----- Basin Index (%) * 143 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 23.0 -M * Buck Pasture 9632 .0 -M * 33.8 -M * EF Blacks Fork GS 9360 .0 -M * 29.5 -M * Hams Fork 7840 -M .0 * -M 19.0 * Hewinta 9500 .0 .0 * 27.0 24.8 109 Hickerson Park 9122 .0 .0 * 22.2 20.7 107 Hole-in-Rock 9168 .0 .0 * 23.8 20.1 118 Indian Creek 9425 .1 .0 * 49.4 32.7 151 Kelley R.S. 8180 .2 .0 * 39.2 27.1 145 Spirit Lk 10235 .0 -M * 30.8 -M * Steel Creek Park 10158 .0 .0 * 33.0 28.7 115 ----- ----- Basin Index (%) * 126 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 24.9 -M * Bug Lake 7987 .0 .0 * 42.2 28.7 147 Burts Miller Ranch 8000 .0 -M * 13.8 -M * Chalk Creek #1 9171 .0 .0 * 47.2 38.6 122 Hayden Fork 9130 .0 .0 * 37.3 32.8 114 Kelley R.S. 8180 .2 .0 * 39.2 27.1 145 Lily Lake 9133 .0 .0 * 29.1 28.1 104 Monte Cristo 8932 .0 .0 * 50.5 38.0 133 Salt River Summit 7760 .1 .0 * 34.0 25.8 132 ----- ----- Basin Index (%) * 128 ----------------------------------------------------------------------------- -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.