Supercell over Laramie
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Wyoming Snow Precipitation Update

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 SUNDAY: OCTOBER 1 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .2 .0 * 52.3 31.8 164 Black Bear 8170 1.8 .0 * 73.5 54.7 134 Blind Bull Sum 8650 1.2 .0 * 47.8 30.8 155 Cottonwood Creek 7670 .2 .0 * 55.1 39.0 141 East Rim Divide 7930 .1 .0 * 30.6 19.9 154 Grand Targhee 9260 3.5 .8 438* 67.1 48.1 140 Granite Creek 6770 .1 .0 * 48.7 29.5 165 Grassy Lake 7265 .4 .0 * 72.8 52.1 140 Gros Ventre Summit 8750 .2 .0 * 36.2 23.5 154 Gunsight Pass 9820 1.0 .0 * -M 25.7 * Lewis Lake Divide 7850 .1 .0 * 74.0 50.4 147 Phillips Bench 8200 .0 .0 * 60.7 41.2 147 Salt River Summit 7760 .1 .0 * 35.7 26.8 133 Snake River Station 6920 .0 .0 * 49.0 34.7 141 Spring Creek Divide 9000 .8 .0 * 52.9 35.6 149 Thumb Divide 7980 .0 .0 * 40.7 29.5 138 Togwotee Pass 9580 -M .0 * 55.7 38.6 144 Two Ocean Plateau 9240 4.1 .0 * 67.4 43.0 157 Willow Creek 8380 .1 .0 * 69.6 51.9 134 Younts Peak 8350 .1 .0 * 47.7 29.3 163 ----- ----- Basin Index (%) 1750* 146 MADISON-GALLATIN Black Bear 8170 1.8 .0 * 73.5 54.7 134 Canyon 7870 .2 .0 * 37.6 27.6 136 Madison Plateau 7750 .2 .0 * 50.9 40.3 126 West Yellowstone 6700 .2 .0 * 34.5 23.8 145 Whiskey Creek 6800 .0 .0 * 39.4 32.7 120 ----- ----- Basin Index (%) * 132 YELLOWSTONE Beartooth Lake 9360 1.3 .0 * 42.6 32.9 129 Burnt Mtn 5880 .0 .0 * 31.1 29.5 105 Canyon 7870 .2 .0 * 37.6 27.6 136 Cole Creek 7850 1.2 .0 * 25.5 31.2 82 Evening Star 9200 2.3 .0 * 62.3 44.8 139 Fisher Creek 9100 3.3 .0 * 66.8 51.6 129 Northeast Entrance 7350 .0 .0 * 33.2 24.9 133 Parker Peak 9400 2.4 .0 * 54.1 31.8 170 Sylvan Lake 8420 2.3 .0 * 57.0 38.2 149 Thumb Divide 7980 .0 .0 * 40.7 29.5 138 Two Ocean Plateau 9240 4.1 .0 * 67.4 43.0 157 White Mill 8700 3.3 .0 * 52.4 40.3 130 Wolverine 7650 .0 .0 * 33.0 23.4 141 ----- ----- Basin Index (%) * 135 WIND RIVER Burroughs Creek 8750 .2 -M * 37.9 28.2 134 Castle Creek 8400 .0 -M * 28.8 -M * Cold Springs 9630 .4 .0 * 31.3 21.7 144 Deer Park 9700 .4 .0 * 53.9 34.9 154 Hobbs Park 10100 1.0 .0 * 45.2 27.8 163 Kirwin 9550 1.6 .0 * 40.2 26.5 152 Little Warm 9370 1.2 .0 * 36.6 25.9 141 Owl Creek 8975 .0 .0 * 27.8 17.2 162 South Pass 9040 .0 .0 * 43.5 29.5 147 St. Lawrence Alt 8620 .0 .0 * 29.7 20.2 147 Togwotee Pass 9580 -M .0 * 55.7 38.6 144 Townsend Creek 8700 .0 .0 * 39.3 24.6 160 ----- ----- Basin Index (%) * 149 BIGHORN BASIN Bald Mtn. 9380 1.5 .0 * 31.2 32.2 97 Bear Trap Meadow 8200 .1 .0 * 23.4 20.8 112 Bone Springs Div 9350 .2 .0 * 35.5 31.4 113 Grave Springs 8550 .0 .0 * 19.1 23.0 83 Kirwin 9550 1.6 .0 * 40.2 26.5 152 Marquette 8760 .0 -M * 33.5 -M * Middle Powder 7760 .1 .0 * 19.3 25.0 77 Owl Creek 8975 .0 .0 * 27.8 17.2 162 Powder River Pass 9480 .2 .0 * 31.0 26.7 116 Shell Creek 9580 2.2 .0 * 30.2 28.3 107 Timber Creek 7950 .1 .0 * 25.8 21.1 122 ----- ----- Basin Index (%) * 112 SHOSHONE RIVER Blackwater 9780 2.6 .0 * 59.5 36.3 164 Evening Star 9200 2.3 .0 * 62.3 44.8 139 Marquette 8760 .0 -M * 33.5 -M * Sylvan Road 7120 .1 .0 * 44.4 26.9 165 Younts Peak 8350 .1 .0 * 47.7 29.3 163 ----- ----- Basin Index (%) * 156 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 23.4 20.8 112 Cloud Peak Reservoir 9860 .1 .0 * 37.5 30.4 123 Grave Springs 8550 .0 .0 * 19.1 23.0 83 Hansen Sawmill 8360 .0 .0 * 31.6 21.9 144 Middle Powder 7760 .1 .0 * 19.3 25.0 77 Powder River Pass 9480 .2 .0 * 31.0 26.7 116 Soldier Park 8720 .0 -M * 31.4 -M * ----- ----- Basin Index (%) * 110 TONGUE RIVER Big Goose 7990 .1 .0 * 27.1 24.6 110 Bone Springs Div 9350 .2 .0 * 35.5 31.4 113 Burgess Junction 7880 .1 .0 * 29.0 26.0 112 Dome Lake 8880 .1 .0 * 33.1 28.3 117 Little Goose 8870 .0 -M * 34.0 -M * Sucker Creek 8880 .0 .0 * 33.0 29.9 110 Tie Creek 6870 .1 .0 * 32.7 26.7 122 ----- ----- Basin Index (%) * 114 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 25.1 25.3 99 ----- ----- Basin Index (%) * 99 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 25.6 27.5 93 North Rapid Creek 6130 .0 .0 * 24.8 27.2 91 ----- ----- Basin Index (%) * 92 UPPER N. PLATTE Arapaho Ridge 10960 .6 .0 * 37.8 38.5 98 Blackhall Mtn 9820 1.4 -M * 51.7 -M * Columbine 9160 .2 .0 * 40.8 38.1 107 Divide Peak 8880 .0 .0 * 31.9 33.9 94 Joe Wright 10120 .2 .0 * 46.3 44.3 105 Laprele Creek 8375 .1 .0 * 24.2 24.2 100 Med Bow 10500 -M -M * 55.4 -M * North French Creek 10130 -M .0 * 45.1 43.2 104 Never Summer 10280 .2 .0 * 32.3 -M * Old Battle 10000 .8 .0 * 54.0 51.8 104 Rawah 9020 .2 .0 * 28.9 27.2 106 Sage Creek Basin 7850 .0 .0 * 23.5 23.1 102 Sand Lake 10050 .5 .0 * 43.5 40.9 106 South Brush Creek 8440 .1 .0 * 21.9 27.5 80 Tower 10500 -M .0 * 61.4 58.4 105 Webber Springs 9250 .7 .0 * 46.6 40.5 115 Willow Creek Pass 9540 .1 .0 * 28.7 26.0 110 Zirkel 9340 .0 .0 * 57.3 43.4 132 ----- ----- Basin Index (%) * 106 SWEETWATER Deer Park 9700 .4 .0 * 53.9 34.9 154 Larsen Creek 9000 .0 .0 * 34.9 -M * South Pass 9040 .0 .0 * 43.5 29.5 147 ----- ----- Basin Index (%) * 151 LOWER N. PLATTE Casper Mtn. 7900 .3 .0 * 28.7 27.9 103 Laprele Creek 8375 .1 .0 * 24.2 24.2 100 Reno Hill 8400 .1 .0 * 27.4 28.7 95 Windy Peak 7900 .1 .0 * 23.6 22.9 103 ----- ----- Basin Index (%) * 100 LARAMIE RIVER Brooklyn Lake 10240 .1 .0 * 34.9 35.3 99 Cinnabar Park 9574 .0 .0 * 36.7 38.0 97 Crow Creek 8330 -M .0 * 21.2 26.1 81 Deadman Hill 10220 .2 .0 * 36.3 31.1 117 Rawah 9020 .2 .0 * 28.9 27.2 106 Roach 9700 .2 .0 * 36.2 33.3 109 ----- ----- Basin Index (%) * 102 S. PLATTE Black Mountain 8920 .0 -M * 27.4 -M * Crow Creek 8330 -M .0 * 21.2 26.1 81 Deadman Hill 10220 .2 .0 * 36.3 31.1 117 ----- ----- Basin Index (%) * 101 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 23.2 24.3 95 Divide Peak 8880 .0 .0 * 31.9 33.9 94 Elk River 8700 .2 .0 * 30.7 32.4 95 Little Snake River 8915 .3 .0 * 57.5 43.8 131 Old Battle 10000 .8 .0 * 54.0 51.8 104 Sage Creek Basin 7850 .0 .0 * 23.5 23.1 102 Sandstone RS 8150 .3 .0 * 23.9 29.3 82 Whiskey Park 8950 .5 .0 * 43.2 41.8 103 ----- ----- Basin Index (%) * 103 UPPER GREEN RIVER Big Sandy Opening 9080 .2 .0 * 33.9 24.1 141 Blind Bull Sum 8650 1.2 .0 * 47.8 30.8 155 East Rim Divide 7930 .1 .0 * 30.6 19.9 154 Elkhart Park G.S. 9400 .2 .0 * 35.4 24.7 143 Gros Ventre Summit 8750 .2 .0 * 36.2 23.5 154 Gunsight Pass 9820 1.0 .0 * -M 25.7 * Kendall R.S. 7740 .2 .0 * 41.1 22.8 180 Loomis Park 8240 .1 .0 * 44.6 27.7 161 New Fork Lake 8340 .1 .0 * 28.2 20.2 140 Pocket Creek 9360 .5 -M * 34.6 -M * Snider Basin 8060 .0 .0 * 34.7 21.9 158 Spring Creek Divide 9000 .8 .0 * 52.9 35.6 149 Triple Peak 8500 .1 .0 * 53.9 38.0 142 ----- ----- Basin Index (%) * 152 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * -M -M * Buck Pasture 9632 .2 -M * -M -M * EF Blacks Fork GS 9360 -M -M * -M -M * Hams Fork 7840 .3 .0 * 31.0 19.7 157 Hewinta 9500 .0 .0 * 29.9 26.1 115 Hickerson Park 9122 .5 .0 * 24.3 21.1 115 Hole-in-Rock 9168 .0 .0 * 26.2 21.2 124 Indian Creek 9425 .6 .0 * 53.3 33.8 158 Kelley R.S. 8180 .3 .0 * 42.9 27.9 154 Spirit Lk 10235 .1 -M * 33.1 -M * Steel Creek Park 10158 -M .0 * 36.4 30.0 121 ----- ----- Basin Index (%) * 136 UPPER BEAR RIVER Bear River RS 8777 .0 -M * -M -M * Bug Lake 7987 -M .0 * 46.0 29.8 154 Burts Miller Ranch 8000 .0 -M * 16.9 -M * Chalk Creek #1 9171 .3 .0 * 52.7 40.2 131 Hayden Fork 9130 .2 .0 * 42.7 34.1 125 Kelley R.S. 8180 .3 .0 * 42.9 27.9 154 Lily Lake 9133 .0 .0 * 33.3 29.3 114 Monte Cristo 8932 .4 .0 * 53.8 39.2 137 Salt River Summit 7760 .1 .0 * 35.7 26.8 133 ----- ----- Basin Index (%) * 135 ----------------------------------------------------------------------------- -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.