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: SEPTEMBER 18 , 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 31.2 * Black Bear 8170 .2 .0 * 69.0 53.9 128 Blind Bull Sum 8650 .0 .0 * 44.7 30.0 149 Cottonwood Creek 7670 .1 .0 * 51.2 38.0 135 East Rim Divide 7930 .0 .0 * 28.4 19.4 146 Grand Targhee 9260 .0 .0 * 62.0 47.0 132 Granite Creek 6770 .0 .0 * 45.5 29.0 157 Grassy Lake 7265 .0 .0 * 69.4 51.1 136 Gros Ventre Summit 8750 .1 .0 * 33.4 22.8 146 Gunsight Pass 9820 .0 .0 * 37.0 25.1 147 Lewis Lake Divide 7850 .0 .0 * 70.6 49.7 142 Phillips Bench 8200 .0 .0 * 57.2 40.5 141 Salt River Summit 7760 .1 .0 * 34.9 26.0 134 Snake River Station 6920 .0 .0 * 45.9 34.2 134 Spring Creek Divide 9000 .3 .0 * 49.8 34.9 143 Thumb Divide 7980 .0 .0 * 37.1 29.1 127 Togwotee Pass 9580 .1 .0 * 52.0 37.7 138 Two Ocean Plateau 9240 .1 .0 * -M 42.2 * Willow Creek 8380 .0 .0 * 64.9 50.6 128 Younts Peak 8350 .0 .0 * 44.1 28.3 156 ----- ----- Basin Index (%) * 139 MADISON-GALLATIN Black Bear 8170 .2 .0 * 69.0 53.9 128 Canyon 7870 .2 .0 * 34.7 27.0 129 Madison Plateau 7750 .0 .0 * 47.3 39.8 119 West Yellowstone 6700 .1 .0 * 31.9 23.5 136 Whiskey Creek 6800 .0 .0 * 36.9 32.1 115 ----- ----- Basin Index (%) * 125 YELLOWSTONE Beartooth Lake 9360 .2 .0 * 40.9 32.2 127 Burnt Mtn 5880 .2 .0 * 29.1 28.9 101 Canyon 7870 .2 .0 * 34.7 27.0 129 Cole Creek 7850 1.2 .0 * 23.8 30.0 79 Evening Star 9200 .2 .0 * 58.5 43.8 134 Fisher Creek 9100 .3 .0 * 62.6 50.5 124 Northeast Entrance 7350 .1 .0 * 30.1 24.2 124 Parker Peak 9400 .4 .0 * 50.7 30.9 164 Sylvan Lake 8420 .3 .0 * 51.9 37.0 140 Thumb Divide 7980 .0 .0 * 37.1 29.1 127 Two Ocean Plateau 9240 .1 .0 * -M 42.2 * White Mill 8700 .3 .0 * 48.8 39.5 124 Wolverine 7650 -M .0 * 31.4 22.7 138 ----- ----- Basin Index (%) * 126 WIND RIVER Burroughs Creek 8750 .0 -M * 33.8 -M * Castle Creek 8400 .0 -M * 26.4 -M * Cold Springs 9630 .2 .0 * 29.1 20.9 139 Deer Park 9700 .0 .0 * 51.6 33.9 152 Hobbs Park 10100 .1 .0 * 43.0 26.7 161 Kirwin 9550 .4 .0 * 37.7 25.3 149 Little Warm 9370 .1 .0 * 33.5 25.0 134 Owl Creek 8975 .0 .0 * 26.2 16.6 158 South Pass 9040 .0 .0 * 41.2 28.6 144 St. Lawrence Alt 8620 .0 .0 * 27.7 19.4 143 Togwotee Pass 9580 .1 .0 * 52.0 37.7 138 Townsend Creek 8700 .1 .0 * 36.3 23.6 154 ----- ----- Basin Index (%) * 147 BIGHORN BASIN Bald Mtn. 9380 .9 .0 * 29.2 31.0 94 Bear Trap Meadow 8200 .1 .0 * 21.9 19.9 110 Bone Springs Div 9350 .1 .0 * 33.3 30.1 111 Grave Springs 8550 .0 .0 * 17.9 22.1 81 Kirwin 9550 .4 .0 * 37.7 25.3 149 Marquette 8760 .1 -M * 32.0 -M * Middle Powder 7760 .3 .0 * 18.5 23.9 77 Owl Creek 8975 .0 .0 * 26.2 16.6 158 Powder River Pass 9480 .2 .0 * 28.6 25.7 111 Shell Creek 9580 .1 .0 * 27.8 27.2 102 Timber Creek 7950 .0 .0 * 24.8 20.3 122 ----- ----- Basin Index (%) * 110 SHOSHONE RIVER Blackwater 9780 .1 .0 * 56.1 35.2 159 Evening Star 9200 .2 .0 * 58.5 43.8 134 Marquette 8760 .1 -M * 32.0 -M * Sylvan Road 7120 .0 .0 * 40.6 27.7 147 Younts Peak 8350 .0 .0 * 44.1 28.3 156 ----- ----- Basin Index (%) * 148 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 21.9 19.9 110 Cloud Peak Reservoir 9860 .0 .0 * 35.8 29.3 122 Grave Springs 8550 .0 .0 * 17.9 22.1 81 Hansen Sawmill 8360 .0 .0 * 30.2 21.1 143 Middle Powder 7760 .3 .0 * 18.5 23.9 77 Powder River Pass 9480 .2 .0 * 28.6 25.7 111 Soldier Park 8720 .0 -M * 30.2 -M * ----- ----- Basin Index (%) * 108 TONGUE RIVER Big Goose 7990 .0 .0 * 26.0 23.8 109 Bone Springs Div 9350 .1 .0 * 33.3 30.1 111 Burgess Junction 7880 .0 .0 * 27.6 24.5 113 Dome Lake 8880 .0 .0 * 31.2 27.2 115 Little Goose 8870 .0 -M * 32.2 -M * Sucker Creek 8880 .0 .0 * 31.8 28.7 111 Tie Creek 6870 .0 .0 * 31.5 25.7 123 ----- ----- Basin Index (%) * 113 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 23.9 24.7 97 ----- ----- Basin Index (%) * 97 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 24.6 26.9 91 North Rapid Creek 6130 .2 .0 * 24.1 26.3 92 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10960 -M .0 * -M 37.2 * Blackhall Mtn 9820 .7 -M * 49.4 -M * Columbine 9160 .3 .0 * 39.3 37.1 106 Divide Peak 8880 .0 .0 * 30.2 32.8 92 Joe Wright 10120 .4 .0 * 43.8 42.8 102 Laprele Creek 8375 .0 .0 * 23.2 23.5 99 Med Bow 10500 .1 -M * 52.2 -M * North French Creek 10130 -M .0 * 42.4 42.1 101 Never Summer 10280 -M .0 * 30.9 -M * Old Battle 10000 .1 .0 * 51.5 50.4 102 Rawah 9020 .1 .0 * 26.5 26.2 101 Sage Creek Basin 7850 -M .0 * 21.9 22.3 98 Sand Lake 10050 .0 .0 * 42.0 39.8 106 South Brush Creek 8440 .1 .0 * 20.2 26.5 76 Tower 10500 -M .0 * -M 56.9 * Webber Springs 9250 .6 .0 * 44.5 39.3 113 Willow Creek Pass 9540 .1 .0 * 27.7 25.1 110 Zirkel 9340 .0 .0 * 56.0 42.0 133 ----- ----- Basin Index (%) * 104 SWEETWATER Deer Park 9700 .0 .0 * 51.6 33.9 152 Larsen Creek 9000 .0 .0 * 32.5 -M * South Pass 9040 .0 .0 * 41.2 28.6 144 ----- ----- Basin Index (%) * 148 LOWER N. PLATTE Casper Mtn. 7900 .2 .0 * 27.1 27.1 100 Laprele Creek 8375 .0 .0 * 23.2 23.5 99 Reno Hill 8400 .0 .0 * 26.1 27.8 94 Windy Peak 7900 .1 .0 * 22.5 22.2 101 ----- ----- Basin Index (%) * 98 LARAMIE RIVER Brooklyn Lake 10240 .0 .0 * 32.9 34.4 96 Cinnabar Park 9574 .0 .0 * 34.8 36.9 94 Crow Creek 8330 -M .0 * 19.9 25.0 80 Deadman Hill 10220 .1 .0 * 34.6 30.1 115 Rawah 9020 .1 .0 * 26.5 26.2 101 Roach 9700 .1 .0 * 34.2 32.2 106 ----- ----- Basin Index (%) * 99 S. PLATTE Black Mountain 8920 .0 -M * 25.9 -M * Crow Creek 8330 -M .0 * 19.9 25.0 80 Deadman Hill 10220 .1 .0 * 34.6 30.1 115 ----- ----- Basin Index (%) * 99 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.4 23.5 95 Divide Peak 8880 .0 .0 * 30.2 32.8 92 Elk River 8700 .0 .0 * 29.3 31.5 93 Little Snake River 8915 .1 .0 * 52.4 42.5 123 Old Battle 10000 .1 .0 * 51.5 50.4 102 Sage Creek Basin 7850 -M .0 * 21.9 22.3 98 Sandstone RS 8150 .2 .0 * 23.0 28.5 81 Whiskey Park 8950 .0 .0 * 40.8 40.7 100 ----- ----- Basin Index (%) * 100 UPPER GREEN RIVER Big Sandy Opening 9080 .0 .0 * 31.7 23.3 136 Blind Bull Sum 8650 .0 .0 * 44.7 30.0 149 East Rim Divide 7930 .0 .0 * 28.4 19.4 146 Elkhart Park G.S. 9400 .1 .0 * 33.3 23.7 141 Gros Ventre Summit 8750 .1 .0 * 33.4 22.8 146 Gunsight Pass 9820 .0 .0 * 37.0 25.1 147 Kendall R.S. 7740 .1 .0 * 38.5 22.3 173 Loomis Park 8240 .0 .0 * 41.9 27.0 155 New Fork Lake 8340 .0 .0 * 26.9 19.6 137 Pocket Creek 9360 .0 -M * 31.6 -M * Snider Basin 8060 .0 .0 * 32.2 21.3 151 Spring Creek Divide 9000 .3 .0 * 49.8 34.9 143 Triple Peak 8500 .0 .0 * 51.1 37.3 137 ----- ----- Basin Index (%) * 146 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 23.8 -M * Buck Pasture 9632 .0 -M * 34.8 -M * EF Blacks Fork GS 9360 .0 -M * 30.1 -M * Hams Fork 7840 -M .0 * -M 19.2 * Hewinta 9500 .0 .0 * 27.7 25.2 110 Hickerson Park 9122 .0 .0 * 22.7 21.0 108 Hole-in-Rock 9168 .0 .0 * 24.4 20.5 119 Indian Creek 9425 .0 .0 * 50.2 33.0 152 Kelley R.S. 8180 .1 .0 * 40.5 27.3 148 Spirit Lk 10235 .0 -M * 31.2 -M * Steel Creek Park 10158 .0 .0 * 33.7 29.1 116 ----- ----- Basin Index (%) * 128 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 25.7 -M * Bug Lake 7987 .0 .0 * 42.8 28.9 148 Burts Miller Ranch 8000 .0 -M * 14.5 -M * Chalk Creek #1 9171 .0 .0 * 49.0 39.1 125 Hayden Fork 9130 .0 .0 * 39.4 33.3 118 Kelley R.S. 8180 .1 .0 * 40.5 27.3 148 Lily Lake 9133 .0 .0 * 29.9 28.5 105 Monte Cristo 8932 .0 .0 * 51.4 38.3 134 Salt River Summit 7760 .1 .0 * 34.9 26.0 134 ----- ----- 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.