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 20 , 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 * 49.9 31.3 159 Black Bear 8170 1.4 .0 * 70.9 54.1 131 Blind Bull Sum 8650 .5 .0 * 45.9 30.1 152 Cottonwood Creek 7670 .4 .0 * 52.9 38.2 138 East Rim Divide 7930 .0 .0 * 28.9 19.5 148 Grand Targhee 9260 .4 .0 * 62.7 47.0 133 Granite Creek 6770 .0 .0 * 46.6 29.1 160 Grassy Lake 7265 .2 .0 * 70.7 51.3 138 Gros Ventre Summit 8750 .1 .0 * 34.2 22.9 149 Gunsight Pass 9820 .7 .0 * 38.3 25.2 152 Lewis Lake Divide 7850 .4 .0 * 71.9 49.8 144 Phillips Bench 8200 -M .0 * 58.3 40.6 144 Salt River Summit 7760 .0 .0 * 35.8 26.1 137 Snake River Station 6920 .0 .0 * 46.9 34.4 136 Spring Creek Divide 9000 .7 .0 * 51.2 35.0 146 Thumb Divide 7980 .3 .0 * 38.7 29.2 133 Togwotee Pass 9580 .7 .0 * 52.9 37.9 140 Two Ocean Plateau 9240 1.7 .0 * -M 42.4 * Willow Creek 8380 .6 .0 * 67.2 50.7 133 Younts Peak 8350 .1 .0 * 45.1 28.5 158 ----- ----- Basin Index (%) * 142 MADISON-GALLATIN Black Bear 8170 1.4 .0 * 70.9 54.1 131 Canyon 7870 .2 .0 * 35.7 27.1 132 Madison Plateau 7750 .8 .0 * 48.9 39.9 123 West Yellowstone 6700 .2 .0 * -M 23.6 * Whiskey Creek 6800 .0 .0 * 37.7 32.2 117 ----- ----- Basin Index (%) * 126 YELLOWSTONE Beartooth Lake 9360 .5 .0 * -M 32.3 * Burnt Mtn 5880 .2 .0 * 29.1 28.9 101 Canyon 7870 .2 .0 * 35.7 27.1 132 Cole Creek 7850 .9 .0 * 23.9 30.2 79 Evening Star 9200 -M .0 * 59.7 44.0 136 Fisher Creek 9100 -M .0 * 63.8 50.7 126 Northeast Entrance 7350 .3 .0 * 30.8 24.3 127 Parker Peak 9400 .8 .0 * 51.7 31.1 166 Sylvan Lake 8420 -M .0 * -M 37.2 * Thumb Divide 7980 .3 .0 * 38.7 29.2 133 Two Ocean Plateau 9240 1.7 .0 * -M 42.4 * White Mill 8700 .9 .0 * 49.8 39.6 126 Wolverine 7650 -M .0 * 31.9 22.9 139 ----- ----- Basin Index (%) * 127 WIND RIVER Burroughs Creek 8750 .0 -M * 34.8 -M * Castle Creek 8400 .0 -M * 27.0 -M * Cold Springs 9630 .3 .0 * 29.5 21.1 140 Deer Park 9700 .8 .0 * 52.3 34.1 153 Hobbs Park 10100 .7 .0 * 43.6 26.9 162 Kirwin 9550 .1 .0 * 38.1 25.5 149 Little Warm 9370 .4 .0 * 34.4 25.1 137 Owl Creek 8975 .0 .0 * 26.3 16.7 157 South Pass 9040 .1 .0 * 42.1 28.8 146 St. Lawrence Alt 8620 .0 .0 * 28.4 19.6 145 Togwotee Pass 9580 .7 .0 * 52.9 37.9 140 Townsend Creek 8700 .0 .0 * 37.1 23.8 156 ----- ----- Basin Index (%) * 148 BIGHORN BASIN Bald Mtn. 9380 1.2 .0 * 30.0 31.3 96 Bear Trap Meadow 8200 .1 .0 * 22.5 20.1 112 Bone Springs Div 9350 .3 .0 * 34.1 30.4 112 Grave Springs 8550 .0 .0 * 17.9 22.3 80 Kirwin 9550 .1 .0 * 38.1 25.5 149 Marquette 8760 .0 -M * 32.2 -M * Middle Powder 7760 .4 .0 * 18.2 24.1 76 Owl Creek 8975 .0 .0 * 26.3 16.7 157 Powder River Pass 9480 -M .0 * 29.5 26.0 113 Shell Creek 9580 .9 .0 * 28.8 27.4 105 Timber Creek 7950 .1 .0 * 24.9 20.5 121 ----- ----- Basin Index (%) * 111 SHOSHONE RIVER Blackwater 9780 1.1 .0 * 57.4 35.4 162 Evening Star 9200 -M .0 * 59.7 44.0 136 Marquette 8760 .0 -M * 32.2 -M * Sylvan Road 7120 .4 .0 * -M 27.9 * Younts Peak 8350 .1 .0 * 45.1 28.5 158 ----- ----- Basin Index (%) * 150 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 22.5 20.1 112 Cloud Peak Reservoir 9860 .1 .0 * 36.2 29.5 123 Grave Springs 8550 .0 .0 * 17.9 22.3 80 Hansen Sawmill 8360 .1 .0 * 30.4 21.4 142 Middle Powder 7760 .4 .0 * 18.2 24.1 76 Powder River Pass 9480 -M .0 * 29.5 26.0 113 Soldier Park 8720 .0 -M * 30.4 -M * ----- ----- Basin Index (%) * 108 TONGUE RIVER Big Goose 7990 .1 .0 * 26.3 24.0 110 Bone Springs Div 9350 .3 .0 * 34.1 30.4 112 Burgess Junction 7880 .0 .0 * 27.5 24.7 111 Dome Lake 8880 .0 .0 * 31.7 27.4 116 Little Goose 8870 .0 -M * 32.7 -M * Sucker Creek 8880 .0 .0 * 32.0 28.9 111 Tie Creek 6870 .0 .0 * 31.7 25.9 122 ----- ----- Basin Index (%) * 114 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 24.1 24.9 97 ----- ----- Basin Index (%) * 97 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 24.8 27.1 92 North Rapid Creek 6130 .1 .0 * 24.1 26.7 90 ----- ----- Basin Index (%) * 91 UPPER N. PLATTE Arapaho Ridge 10960 -M .0 * -M 37.3 * Blackhall Mtn 9820 1.1 -M * 49.9 -M * Columbine 9160 .3 .0 * 39.4 37.3 106 Divide Peak 8880 .0 .0 * 30.6 32.9 93 Joe Wright 10120 .5 .0 * 44.0 43.0 102 Laprele Creek 8375 .0 .0 * 23.3 23.6 99 Med Bow 10500 .7 -M * 53.0 -M * North French Creek 10130 -M .0 * 42.9 42.3 101 Never Summer 10280 -M .0 * 30.9 -M * Old Battle 10000 .6 .0 * 51.9 50.7 102 Rawah 9020 .6 .0 * 27.0 26.3 103 Sage Creek Basin 7850 .1 .0 * 22.4 22.4 100 Sand Lake 10050 .3 .0 * 42.2 40.0 106 South Brush Creek 8440 .2 .0 * 20.6 26.7 77 Tower 10500 -M .0 * -M 57.2 * Webber Springs 9250 .7 .0 * 45.0 39.4 114 Willow Creek Pass 9540 .1 .0 * 27.8 25.2 110 Zirkel 9340 .0 .0 * 56.3 42.1 134 ----- ----- Basin Index (%) * 105 SWEETWATER Deer Park 9700 .8 .0 * 52.3 34.1 153 Larsen Creek 9000 .0 .0 * 33.7 -M * South Pass 9040 .1 .0 * 42.1 28.8 146 ----- ----- Basin Index (%) * 150 LOWER N. PLATTE Casper Mtn. 7900 .3 .0 * 27.2 27.2 100 Laprele Creek 8375 .0 .0 * 23.3 23.6 99 Reno Hill 8400 .0 .0 * 26.2 27.9 94 Windy Peak 7900 .1 .0 * 22.5 22.3 101 ----- ----- Basin Index (%) * 98 LARAMIE RIVER Brooklyn Lake 10240 .2 .0 * 33.3 34.6 96 Cinnabar Park 9574 .0 .0 * 35.2 36.9 95 Crow Creek 8330 -M .0 * 20.0 25.1 80 Deadman Hill 10220 .3 .0 * 34.9 30.2 116 Rawah 9020 .6 .0 * 27.0 26.3 103 Roach 9700 .3 .0 * 34.5 32.5 106 ----- ----- Basin Index (%) * 100 S. PLATTE Black Mountain 8920 .0 -M * 26.1 -M * Crow Creek 8330 -M .0 * 20.0 25.1 80 Deadman Hill 10220 .3 .0 * 34.9 30.2 116 ----- ----- Basin Index (%) * 99 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.4 23.6 95 Divide Peak 8880 .0 .0 * 30.6 32.9 93 Elk River 8700 .3 .0 * 29.4 31.7 93 Little Snake River 8915 .4 .0 * 53.5 42.5 126 Old Battle 10000 .6 .0 * 51.9 50.7 102 Sage Creek Basin 7850 .1 .0 * 22.4 22.4 100 Sandstone RS 8150 .4 .0 * 23.2 28.6 81 Whiskey Park 8950 .5 .0 * 41.4 40.9 101 ----- ----- Basin Index (%) * 101 UPPER GREEN RIVER Big Sandy Opening 9080 .2 .0 * 32.6 23.4 139 Blind Bull Sum 8650 .5 .0 * 45.9 30.1 152 East Rim Divide 7930 .0 .0 * 28.9 19.5 148 Elkhart Park G.S. 9400 .1 .0 * 33.9 23.9 142 Gros Ventre Summit 8750 .1 .0 * 34.2 22.9 149 Gunsight Pass 9820 .7 .0 * 38.3 25.2 152 Kendall R.S. 7740 .1 .0 * 39.1 22.4 175 Loomis Park 8240 .1 .0 * 42.7 27.1 158 New Fork Lake 8340 .0 .0 * 26.9 19.7 137 Pocket Creek 9360 .2 -M * 32.4 -M * Snider Basin 8060 .0 .0 * 33.0 21.4 154 Spring Creek Divide 9000 .7 .0 * 51.2 35.0 146 Triple Peak 8500 .2 .0 * 52.3 37.4 140 ----- ----- Basin Index (%) * 149 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 24.4 -M * Buck Pasture 9632 .3 -M * 35.6 -M * EF Blacks Fork GS 9360 .3 -M * 30.7 -M * Hams Fork 7840 -M .0 * -M 19.3 * Hewinta 9500 .2 .0 * 28.3 25.3 112 Hickerson Park 9122 .4 .0 * 22.8 21.1 108 Hole-in-Rock 9168 .0 .0 * 24.8 20.6 120 Indian Creek 9425 .3 .0 * 51.2 33.1 155 Kelley R.S. 8180 .1 .0 * 41.5 27.4 151 Spirit Lk 10235 .0 -M * 31.2 -M * Steel Creek Park 10158 .6 .0 * 34.4 29.3 117 ----- ----- Basin Index (%) * 129 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 26.4 -M * Bug Lake 7987 .8 .0 * 44.1 29.0 152 Burts Miller Ranch 8000 .0 -M * 15.0 -M * Chalk Creek #1 9171 .5 .0 * 50.0 39.4 127 Hayden Fork 9130 .2 .0 * 40.3 33.5 120 Kelley R.S. 8180 .1 .0 * 41.5 27.4 151 Lily Lake 9133 .0 .0 * 30.6 28.7 107 Monte Cristo 8932 .6 .0 * 52.9 38.5 137 Salt River Summit 7760 .0 .0 * 35.8 26.1 137 ----- ----- Basin Index (%) * 133 ----------------------------------------------------------------------------- -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.