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 THURSDAY: JANUARY 11 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 9.3 8.7 107 11.0 11.6 95 Black Bear 8170 -M 19.8 * -M 20.5 * Blind Bull Sum 8650 15.6 11.3 138 9.8 10.7 92 Cottonwood Creek 7670 9.3 9.4 99 11.1 13.1 85 East Rim Divide 7930 5.1 5.2 98 5.8 6.4 91 Grand Targhee 9260 26.3 20.6 128 15.7 17.5 90 Granite Creek 6770 8.3 7.7 108 11.1 11.0 101 Grassy Lake 7265 12.5 15.4 81 16.3 19.6 83 Gros Ventre Summit 8750 8.6 7.1 121 8.1 6.9 117 Gunsight Pass 9820 8.5 7.0 121 8.9 7.4 120 Lewis Lake Divide 7850 15.5 15.4 101 18.2 19.4 94 Phillips Bench 8200 11.6 13.3 87 12.7 15.0 85 Salt River Summit 7640 4.2 5.7 74 6.3 8.7 72 Snake River Station 6920 7.7 8.1 95 12.0 12.7 94 Spring Creek Divide 9000 11.4 11.1 103 11.7 12.7 92 Thumb Divide 7980 9.5 7.4 128 10.8 10.1 107 Togwotee Pass 9580 17.2 12.5 138 17.4 13.3 131 Two Ocean Plateau 9240 21.3 14.7 145 15.5 14.5 107 Willow Creek 8080 14.1 12.9 109 17.1 17.9 96 Younts Peak 8350 -M 7.7 * -M 8.8 * ----- ----- Basin Index (%) 112 96 MADISON-GALLATIN Black Bear 8170 -M 19.8 * -M 20.5 * Canyon 7870 8.4 6.6 127 10.0 8.9 112 Madison Plateau 7750 11.9 11.3 105 13.1 14.4 91 West Yellowstone 6700 -M 5.8 * -M 8.1 * Whiskey Creek 6800 6.7 8.0 84 8.8 11.2 79 ----- ----- Basin Index (%) 104 92 YELLOWSTONE Beartooth Lake 9360 20.5 11.5 178 18.8 10.6 177 Burnt Mtn 5880 3.0 1.9 158 8.4 7.2 117 Canyon 7870 8.4 6.6 127 10.0 8.9 112 Cole Creek 7850 8.2 6.8 121 5.7 6.8 84 Evening Star 9200 21.6 13.3 162 23.0 15.1 152 Fisher Creek 9100 27.8 17.2 162 23.6 17.2 137 Northeast Entrance 7350 5.6 4.9 114 9.0 7.0 129 Parker Peak 9400 18.6 11.2 166 -M 9.6 * Sylvan Lake 8420 13.2 10.8 122 14.2 12.6 113 Thumb Divide 7980 9.5 7.4 128 10.8 10.1 107 Two Ocean Plateau 9240 21.3 14.7 145 15.5 14.5 107 White Mill 8700 20.9 11.8 177 15.2 12.9 118 Wolverine 7650 8.8 5.6 157 11.4 7.0 163 ----- ----- Basin Index (%) 151 127 WIND RIVER Burroughs Creek 8750 8.1 -M * 9.5 -M * Castle Creek 8400 4.6 -M * 6.0 -M * Cold Springs 9630 5.5 3.7 149 6.0 5.4 111 Deer Park 9700 7.0 7.0 100 8.3 10.3 81 Hobbs Park 10100 10.2 7.1 144 8.4 6.7 125 Kirwin 9550 11.6 4.9 237 10.2 6.3 162 Little Warm 9370 9.6 5.2 185 9.7 6.9 141 Owl Creek 8975 2.5 2.8 89 4.1 3.1 132 South Pass 9040 6.6 7.2 92 4.9 9.3 53 St. Lawrence Alt 8620 2.3 3.4 68 5.6 4.6 122 Togwotee Pass 9580 17.2 12.5 138 17.4 13.3 131 Townsend Creek 8700 4.2 4.2 100 5.6 6.2 90 ----- ----- Basin Index (%) 132 111 BIGHORN BASIN Bald Mtn. 9380 10.8 9.5 114 7.1 8.9 80 Bear Trap Meadow 8200 4.0 2.8 143 5.1 4.5 113 Bone Springs Div 9350 8.9 8.1 110 6.6 8.0 82 Grave Springs 8550 3.1 4.0 78 2.9 5.6 52 Kirwin 9550 11.6 4.9 237 10.2 6.3 162 Marquette 8760 3.4 -M * 6.6 -M * Middle Powder 7760 4.3 5.6 77 3.2 6.5 49 Owl Creek 8975 2.5 2.8 89 4.1 3.1 132 Powder River Pass 9480 8.1 5.6 145 6.7 6.7 100 Shell Creek 9580 11.0 7.7 143 7.5 7.3 103 Timber Creek 7950 2.2 2.3 96 1.8 4.1 44 ----- ----- Basin Index (%) 125 90 SHOSHONE RIVER Blackwater 9780 19.9 12.2 163 17.5 11.2 156 Evening Star 9200 21.6 13.3 162 23.0 15.1 152 Marquette 8760 3.4 -M * 6.6 -M * Sylvan Road 7120 6.7 6.1 110 11.5 10.2 113 Younts Peak 8350 -M 7.7 * -M 8.8 * ----- ----- Basin Index (%) 153 142 POWDER RIVER Bear Trap Meadow 8200 4.0 2.8 143 5.1 4.5 113 Cloud Peak Reservoir 9860 7.6 6.8 112 7.2 6.8 106 Grave Springs 8550 3.1 4.0 78 2.9 5.6 52 Hansen Sawmill 8360 3.6 3.4 106 4.9 4.4 111 Middle Powder 7760 4.3 5.6 77 3.2 6.5 49 Powder River Pass 9480 8.1 5.6 145 6.7 6.7 100 Soldier Park 8720 2.5 -M * 5.2 -M * ----- ----- Basin Index (%) 109 87 TONGUE RIVER Big Goose 7990 3.3 4.1 80 3.9 5.6 70 Bone Springs Div 9350 8.9 8.1 110 6.6 8.0 82 Burgess Junction 7880 4.1 5.2 79 3.8 6.4 59 Dome Lake 8880 5.6 5.8 97 5.3 7.3 73 Little Goose 8870 4.2 -M * 6.1 -M * Sucker Creek 8880 4.5 5.9 76 -M 7.3 * Tie Creek 6870 1.6 2.4 67 4.4 6.1 72 ----- ----- Basin Index (%) 89 72 BELLE FOURCHE Cole Canyon 5910 2.4 2.5 96 4.2 5.0 84 ----- ----- Basin Index (%) 96 84 CHEYENNE RIVER BASIN Blind Park 6890 3.3 3.9 85 5.3 6.6 80 North Rapid Creek 6130 3.5 3.5 100 3.8 5.5 69 ----- ----- Basin Index (%) 92 75 UPPER N. PLATTE Arapaho Ridge 10960 9.6 10.8 89 9.6 12.3 78 Blackhall Mtn 9820 12.6 -M * 13.1 -M * Columbine 9160 5.3 11.3 47 11.5 13.4 86 Divide Peak 8880 6.6 9.8 67 10.0 11.6 86 Joe Wright 10120 7.9 10.6 75 14.6 13.6 107 Laprele Creek 8375 2.5 4.6 54 4.1 6.5 63 Med Bow 10500 18.5 -M * 16.1 -M * North French Creek 10130 13.5 13.2 102 14.1 13.9 101 Never Summer 10280 8.8 10.2 86 7.6 -M * Old Battle 10000 11.5 15.0 77 10.9 18.6 59 Rawah 9020 5.1 5.2 98 8.3 8.2 101 Sage Creek Basin 7850 4.5 6.8 66 6.2 8.4 74 Sand Lake 10050 13.2 13.7 96 10.7 12.6 85 South Brush Creek 8440 5.5 5.7 96 7.1 8.1 88 Tower 10500 15.2 20.9 73 15.5 21.0 74 Webber Springs 9250 8.0 11.4 70 10.1 14.0 72 Willow Creek Pass 9540 7.0 6.0 117 7.6 7.2 106 Zirkel 9340 9.1 13.9 65 14.2 16.0 89 ----- ----- Basin Index (%) 79 83 SWEETWATER Deer Park 9700 7.0 7.0 100 8.3 10.3 81 Larsen Creek 9000 3.8 5.7 67 6.6 -M * South Pass 9040 6.6 7.2 92 4.9 9.3 53 ----- ----- Basin Index (%) 87 67 LOWER N. PLATTE Casper Mtn. 7900 4.2 6.6 64 -M 8.0 * Laprele Creek 8375 2.5 4.6 54 4.1 6.5 63 Reno Hill 8400 5.0 6.5 77 6.0 7.8 77 Windy Peak 7900 2.2 3.3 67 3.9 5.6 70 ----- ----- Basin Index (%) 66 70 LARAMIE RIVER Brooklyn Lake 10240 10.8 9.9 109 11.6 10.5 110 Cinnabar Park 9574 11.2 11.2 100 13.7 13.6 101 Crow Creek 8330 -M 4.9 * 6.1 5.9 103 Deadman Hill 10220 10.3 7.8 132 10.3 8.7 118 Rawah 9020 5.1 5.2 98 8.3 8.2 101 Roach 9700 7.1 8.1 88 9.6 10.0 96 ----- ----- Basin Index (%) 105 105 S. PLATTE Black Mountain 8920 4.5 -M * 7.1 -M * Crow Creek 8330 -M 4.9 * 6.1 5.9 103 Deadman Hill 10220 10.3 7.8 132 10.3 8.7 118 ----- ----- Basin Index (%) 132* 112 LITTLE SNAKE RIVER Battle Mountain 7440 2.3 5.1 45 4.6 8.0 58 Divide Peak 8880 6.6 9.8 67 10.0 11.6 86 Elk River 8700 6.5 8.5 76 8.1 10.5 77 Little Snake River 8915 8.3 11.4 73 13.3 17.3 77 Old Battle 10000 11.5 15.0 77 10.9 18.6 59 Sage Creek Basin 7850 4.5 6.8 66 6.2 8.4 74 Sandstone RS 8150 4.2 5.9 71 4.1 9.9 41 Whiskey Park 8950 8.8 11.5 77 11.9 14.2 84 ----- ----- Basin Index (%) 71 70 UPPER GREEN RIVER Big Sandy Opening 9080 7.1 6.9 103 7.3 7.1 103 Blind Bull Sum 8650 15.6 11.3 138 9.8 10.7 92 East Rim Divide 7930 5.1 5.2 98 5.8 6.4 91 Elkhart Park G.S. 9400 6.1 6.1 100 6.2 7.2 86 Gros Ventre Summit 8750 8.6 7.1 121 8.1 6.9 117 Gunsight Pass 9820 8.5 7.0 121 8.9 7.4 120 Kendall R.S. 7740 7.5 5.9 127 8.4 7.6 111 Loomis Park 8240 8.1 7.2 112 8.8 9.3 95 New Fork Lake 8340 6.1 5.3 115 5.4 5.9 92 Pocket Creek 9360 5.7 -M * 4.9 -M * Snider Basin 8060 5.3 6.1 87 7.3 7.6 96 Spring Creek Divide 9000 11.4 11.1 103 11.7 12.7 92 Triple Peak 8500 12.2 10.3 118 14.3 13.0 110 ----- ----- Basin Index (%) 114 100 LOWER GREEN RIVER Blacks Fork Jct 8869 3.5 -M * 4.7 -M * Buck Pasture 9632 5.8 -M * 6.6 -M * EF Blacks Fork GS 9360 3.1 -M * 3.7 -M * Hams Fork 7840 3.9 5.3 74 4.8 6.1 79 Hewinta 9500 3.3 4.6 72 5.8 7.2 81 Hickerson Park 9122 3.2 3.1 103 3.2 5.4 59 Hole-in-Rock 9168 2.6 3.3 79 3.2 5.0 64 Indian Creek 9425 9.6 11.5 83 7.4 11.6 64 Kelley R.S. 8180 5.9 7.1 83 7.0 9.7 72 Spirit Lk 10235 3.4 -M * 4.2 -M * Steel Creek Park 10158 6.8 6.8 100 6.9 8.4 82 ----- ----- Basin Index (%) 85 72 UPPER BEAR RIVER Bear River RS 8777 3.8 -M * 5.3 -M * Bug Lake 7987 6.2 7.6 82 8.5 10.3 83 Burts Miller Ranch 8000 2.4 -M * 3.3 -M * Chalk Creek #1 9171 7.2 11.1 65 8.1 13.1 62 Hayden Fork 9130 6.0 6.7 90 7.7 10.9 71 Kelley R.S. 8180 5.9 7.1 83 7.0 9.7 72 Lily Lake 9133 5.1 6.0 85 5.7 9.0 63 Monte Cristo 8932 10.1 12.7 80 10.0 13.6 74 Salt River Summit 7640 4.2 5.7 74 6.3 8.7 72 ----- ----- Basin Index (%) 79 71 ----------------------------------------------------------------------------- -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.