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 18 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.6 9.8 108 12.4 12.3 101 Black Bear 8170 22.2 21.1 105 21.4 21.8 98 Blind Bull Sum 8650 17.0 12.4 137 10.8 11.5 94 Cottonwood Creek 7670 11.6 10.8 107 13.4 14.0 96 East Rim Divide 7930 6.2 5.8 107 6.6 6.8 97 Grand Targhee 9260 28.6 21.3 134 17.1 18.1 94 Granite Creek 6770 9.1 8.8 103 12.1 11.9 102 Grassy Lake 7265 14.8 16.9 88 18.3 21.0 87 Gros Ventre Summit 8750 9.3 7.5 124 8.8 7.4 119 Gunsight Pass 9820 9.0 7.5 120 9.4 7.9 119 Lewis Lake Divide 7850 17.4 16.8 104 20.3 20.5 99 Phillips Bench 8200 12.7 15.1 84 14.3 16.1 89 Salt River Summit 7640 5.0 6.5 77 7.1 9.4 76 Snake River Station 6920 9.0 9.2 98 13.3 13.6 98 Spring Creek Divide 9000 13.2 12.3 107 13.2 13.7 96 Thumb Divide 7980 10.4 8.1 128 11.5 10.8 106 Togwotee Pass 9580 18.2 13.1 139 18.5 14.2 130 Two Ocean Plateau 9240 22.6 15.6 145 16.5 15.5 106 Willow Creek 8080 16.6 14.5 114 19.4 19.2 101 Younts Peak 8350 -M 8.6 * -M 9.5 * ----- ----- Basin Index (%) 113 100 MADISON-GALLATIN Black Bear 8170 22.2 21.1 105 21.4 21.8 98 Canyon 7870 9.1 7.3 125 10.8 9.5 114 Madison Plateau 7750 12.8 12.7 101 14.0 15.3 92 West Yellowstone 6700 6.6 6.4 103 9.3 8.5 109 Whiskey Creek 6800 7.5 8.5 88 9.7 11.8 82 ----- ----- Basin Index (%) 104 97 YELLOWSTONE Beartooth Lake 9360 21.6 12.5 173 19.8 11.4 174 Burnt Mtn 5880 3.2 2.2 145 8.5 7.4 115 Canyon 7870 9.1 7.3 125 10.8 9.5 114 Cole Creek 7850 8.3 7.3 114 5.8 7.1 82 Evening Star 9200 23.2 14.2 163 24.7 16.0 154 Fisher Creek 9100 29.3 18.6 158 25.0 18.4 136 Northeast Entrance 7350 6.4 5.5 116 9.8 7.4 132 Parker Peak 9400 19.6 11.7 168 -M 10.2 * Sylvan Lake 8420 13.9 11.3 123 15.3 13.3 115 Thumb Divide 7980 10.4 8.1 128 11.5 10.8 106 Two Ocean Plateau 9240 22.6 15.6 145 16.5 15.5 106 White Mill 8700 22.6 13.0 174 16.5 13.8 120 Wolverine 7650 10.0 6.0 167 12.5 7.4 169 ----- ----- Basin Index (%) 150 128 WIND RIVER Burroughs Creek 8750 9.1 -M * 11.0 -M * Castle Creek 8400 5.2 -M * 6.5 -M * Cold Springs 9630 5.6 4.1 137 6.2 5.7 109 Deer Park 9700 7.3 7.4 99 9.0 11.0 82 Hobbs Park 10100 10.6 7.4 143 9.0 7.1 127 Kirwin 9550 12.0 5.3 226 10.7 6.7 160 Little Warm 9370 10.0 5.7 175 10.1 7.4 136 Owl Creek 8975 2.7 3.0 90 4.3 3.3 130 South Pass 9040 7.0 7.9 89 5.1 9.8 52 St. Lawrence Alt 8620 2.5 3.5 71 5.6 4.9 114 Togwotee Pass 9580 18.2 13.1 139 18.5 14.2 130 Townsend Creek 8700 4.5 4.4 102 5.7 6.6 86 ----- ----- Basin Index (%) 130 110 BIGHORN BASIN Bald Mtn. 9380 11.7 10.0 117 8.1 9.7 84 Bear Trap Meadow 8200 4.5 3.0 150 5.4 4.7 115 Bone Springs Div 9350 9.6 8.9 108 7.5 8.6 87 Grave Springs 8550 3.7 4.4 84 3.2 5.9 54 Kirwin 9550 12.0 5.3 226 10.7 6.7 160 Marquette 8760 3.7 -M * 6.7 -M * Middle Powder 7760 5.0 6.0 83 3.8 6.8 56 Owl Creek 8975 2.7 3.0 90 4.3 3.3 130 Powder River Pass 9480 8.6 5.8 148 7.4 7.1 104 Shell Creek 9580 11.7 8.4 139 8.2 7.9 104 Timber Creek 7950 2.2 2.7 81 1.6 4.3 37 ----- ----- Basin Index (%) 125 93 SHOSHONE RIVER Blackwater 9780 20.9 13.0 161 18.6 11.9 156 Evening Star 9200 23.2 14.2 163 24.7 16.0 154 Marquette 8760 3.7 -M * 6.7 -M * Sylvan Road 7120 8.2 6.9 119 12.3 10.7 115 Younts Peak 8350 -M 8.6 * -M 9.5 * ----- ----- Basin Index (%) 153 144 POWDER RIVER Bear Trap Meadow 8200 4.5 3.0 150 5.4 4.7 115 Cloud Peak Reservoir 9860 8.2 7.4 111 7.8 7.2 108 Grave Springs 8550 3.7 4.4 84 3.2 5.9 54 Hansen Sawmill 8360 3.9 3.5 111 5.2 4.6 113 Middle Powder 7760 5.0 6.0 83 3.8 6.8 56 Powder River Pass 9480 8.6 5.8 148 7.4 7.1 104 Soldier Park 8720 2.8 -M * 5.6 -M * ----- ----- Basin Index (%) 113 90 TONGUE RIVER Big Goose 7990 3.7 4.4 84 4.3 6.0 72 Bone Springs Div 9350 9.6 8.9 108 7.5 8.6 87 Burgess Junction 7880 4.5 6.0 75 4.4 6.9 64 Dome Lake 8880 6.1 6.2 98 5.9 7.6 78 Little Goose 8870 4.5 -M * 6.5 -M * Sucker Creek 8880 5.0 6.4 78 -M 7.8 * Tie Creek 6870 1.9 2.9 66 4.9 6.5 75 ----- ----- Basin Index (%) 89 76 BELLE FOURCHE Cole Canyon 5910 3.3 2.8 118 5.2 5.2 100 ----- ----- Basin Index (%) 118 100 CHEYENNE RIVER BASIN Blind Park 6890 4.1 4.1 100 6.1 7.1 86 North Rapid Creek 6130 4.4 3.8 116 4.7 5.8 81 ----- ----- Basin Index (%) 108 84 UPPER N. PLATTE Arapaho Ridge 10960 10.4 11.2 93 10.4 12.9 81 Blackhall Mtn 9820 13.9 -M * 14.3 -M * Columbine 9160 5.2 12.6 41 10.9 14.4 76 Divide Peak 8880 7.4 10.7 69 10.8 12.2 89 Joe Wright 10120 9.1 11.5 79 15.9 14.3 111 Laprele Creek 8375 3.4 5.0 68 4.8 6.8 71 Med Bow 10500 22.1 -M * 18.9 -M * North French Creek 10130 15.6 14.2 110 16.0 14.9 107 Never Summer 10280 9.2 10.7 86 8.0 -M * Old Battle 10000 12.8 15.9 81 12.3 19.9 62 Rawah 9020 6.0 5.5 109 8.9 8.5 105 Sage Creek Basin 7850 4.9 7.3 67 6.5 8.7 75 Sand Lake 10050 14.8 14.6 101 12.5 13.5 93 South Brush Creek 8440 5.6 6.2 90 7.3 8.6 85 Tower 10500 16.3 23.2 70 17.3 22.5 77 Webber Springs 9250 9.0 12.1 74 11.2 15.1 74 Willow Creek Pass 9540 7.2 6.3 114 7.7 7.5 103 Zirkel 9340 10.8 15.9 68 16.0 16.8 95 ----- ----- Basin Index (%) 81 86 SWEETWATER Deer Park 9700 7.3 7.4 99 9.0 11.0 82 Larsen Creek 9000 4.6 6.2 74 7.1 -M * South Pass 9040 7.0 7.9 89 5.1 9.8 52 ----- ----- Basin Index (%) 88 68 LOWER N. PLATTE Casper Mtn. 7900 4.5 6.8 66 3.9 8.3 47 Laprele Creek 8375 3.4 5.0 68 4.8 6.8 71 Reno Hill 8400 5.6 6.7 84 6.7 8.1 83 Windy Peak 7900 3.0 3.7 81 4.5 5.8 78 ----- ----- Basin Index (%) 74 69 LARAMIE RIVER Brooklyn Lake 10240 12.9 11.0 117 13.9 11.3 123 Cinnabar Park 9574 13.1 11.7 112 15.6 14.3 109 Crow Creek 8330 1.4 5.2 27 -M 6.0 * Deadman Hill 10220 10.7 8.4 127 10.6 9.2 115 Rawah 9020 6.0 5.5 109 8.9 8.5 105 Roach 9700 7.6 9.0 84 10.3 10.6 97 ----- ----- Basin Index (%) 102 110 S. PLATTE Black Mountain 8920 4.7 -M * 7.3 -M * Crow Creek 8330 1.4 5.2 27 -M 6.0 * Deadman Hill 10220 10.7 8.4 127 10.6 9.2 115 ----- ----- Basin Index (%) 89 115* LITTLE SNAKE RIVER Battle Mountain 7440 2.7 5.7 47 -M 8.7 * Divide Peak 8880 7.4 10.7 69 10.8 12.2 89 Elk River 8700 7.4 9.5 78 9.1 11.2 81 Little Snake River 8915 9.5 12.5 76 14.7 18.0 82 Old Battle 10000 12.8 15.9 81 12.3 19.9 62 Sage Creek Basin 7850 4.9 7.3 67 6.5 8.7 75 Sandstone RS 8150 4.5 7.0 64 4.8 10.6 45 Whiskey Park 8950 10.7 13.9 77 13.5 15.5 87 ----- ----- Basin Index (%) 73 75 UPPER GREEN RIVER Big Sandy Opening 9080 7.7 7.0 110 7.9 7.5 105 Blind Bull Sum 8650 17.0 12.4 137 10.8 11.5 94 East Rim Divide 7930 6.2 5.8 107 6.6 6.8 97 Elkhart Park G.S. 9400 6.9 6.6 105 7.0 7.7 91 Gros Ventre Summit 8750 9.3 7.5 124 8.8 7.4 119 Gunsight Pass 9820 9.0 7.5 120 9.4 7.9 119 Kendall R.S. 7740 8.5 6.6 129 9.3 8.2 113 Loomis Park 8240 9.0 8.0 112 9.8 10.0 98 New Fork Lake 8340 6.6 5.8 114 -M 6.3 * Pocket Creek 9360 6.2 -M * 5.5 -M * Snider Basin 8060 6.3 6.5 97 8.2 8.2 100 Spring Creek Divide 9000 13.2 12.3 107 13.2 13.7 96 Triple Peak 8500 13.9 11.5 121 15.8 14.1 112 ----- ----- Basin Index (%) 117 104 LOWER GREEN RIVER Blacks Fork Jct 8869 3.5 -M * 5.0 -M * Buck Pasture 9632 6.0 -M * 6.9 -M * EF Blacks Fork GS 9360 3.2 -M * 3.6 -M * Hams Fork 7840 4.4 5.9 75 5.1 6.5 78 Hewinta 9500 3.8 5.0 76 5.9 7.7 77 Hickerson Park 9122 3.1 3.2 97 2.7 5.6 48 Hole-in-Rock 9168 2.8 3.5 80 3.3 5.3 62 Indian Creek 9425 11.1 12.7 87 8.6 12.4 69 Kelley R.S. 8180 6.6 7.6 87 7.8 10.3 76 Spirit Lk 10235 3.6 -M * 4.3 -M * Steel Creek Park 10158 7.1 7.4 96 7.2 8.9 81 ----- ----- Basin Index (%) 86 72 UPPER BEAR RIVER Bear River RS 8777 4.0 -M * 5.5 -M * Bug Lake 7987 7.5 8.8 85 8.9 11.0 81 Burts Miller Ranch 8000 2.1 -M * 3.4 -M * Chalk Creek #1 9171 7.3 11.8 62 8.3 13.9 60 Hayden Fork 9130 6.1 7.4 82 8.0 11.6 69 Kelley R.S. 8180 6.6 7.6 87 7.8 10.3 76 Lily Lake 9133 5.5 6.6 83 5.8 9.6 60 Monte Cristo 8932 10.5 13.8 76 10.7 14.5 74 Salt River Summit 7640 5.0 6.5 77 7.1 9.4 76 ----- ----- Basin Index (%) 78 70 ----------------------------------------------------------------------------- -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.