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 SATURDAY: JANUARY 20 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 11.0 9.9 111 12.6 12.5 101 Black Bear 8170 24.6 21.6 114 23.8 22.1 108 Blind Bull Sum 8650 17.5 12.6 139 11.1 11.6 96 Cottonwood Creek 7670 12.3 11.1 111 14.1 14.3 99 East Rim Divide 7930 6.3 6.0 105 6.7 6.9 97 Grand Targhee 9260 29.5 21.4 138 17.6 18.4 96 Granite Creek 6770 9.4 9.1 103 12.3 12.1 102 Grassy Lake 7265 16.1 17.4 93 19.7 21.3 92 Gros Ventre Summit 8750 9.4 7.6 124 8.9 7.5 119 Gunsight Pass 9820 9.2 7.7 119 9.5 8.0 119 Lewis Lake Divide 7850 18.8 17.2 109 20.7 20.8 100 Phillips Bench 8200 13.1 15.5 85 14.6 16.3 90 Salt River Summit 7640 5.4 6.8 79 7.4 9.6 77 Snake River Station 6920 9.8 9.3 105 14.2 13.8 103 Spring Creek Divide 9000 13.9 12.6 110 13.8 13.9 99 Thumb Divide 7980 11.1 8.3 134 12.0 10.9 110 Togwotee Pass 9580 18.5 13.2 140 18.8 14.4 131 Two Ocean Plateau 9240 23.6 15.7 150 17.6 15.7 112 Willow Creek 8080 17.5 15.0 117 20.5 19.5 105 Younts Peak 8350 -M 8.7 * -M 9.6 * ----- ----- Basin Index (%) 116 102 MADISON-GALLATIN Black Bear 8170 24.6 21.6 114 23.8 22.1 108 Canyon 7870 -M 7.5 * -M 9.6 * Madison Plateau 7750 15.0 13.1 115 16.1 15.5 104 West Yellowstone 6700 7.7 6.5 118 -M 8.6 * Whiskey Creek 6800 9.0 8.7 103 10.8 12.0 90 ----- ----- Basin Index (%) 113 102 YELLOWSTONE Beartooth Lake 9360 22.9 12.7 180 21.2 11.5 184 Burnt Mtn 5880 3.7 2.3 161 8.7 7.4 118 Canyon 7870 -M 7.5 * -M 9.6 * Cole Creek 7850 9.1 7.5 121 5.9 7.2 82 Evening Star 9200 24.0 14.3 168 25.3 16.3 155 Fisher Creek 9100 30.8 19.0 162 26.4 18.6 142 Northeast Entrance 7350 6.9 5.6 123 10.3 7.5 137 Parker Peak 9400 20.7 11.9 174 17.9 10.4 172 Sylvan Lake 8420 14.7 11.5 128 16.2 13.5 120 Thumb Divide 7980 11.1 8.3 134 12.0 10.9 110 Two Ocean Plateau 9240 23.6 15.7 150 17.6 15.7 112 White Mill 8700 23.7 13.3 178 17.3 13.9 124 Wolverine 7650 10.7 6.2 173 13.1 7.5 175 ----- ----- Basin Index (%) 157 137 WIND RIVER Burroughs Creek 8750 9.1 -M * 11.1 -M * Castle Creek 8400 5.2 -M * 6.5 -M * Cold Springs 9630 5.6 4.2 133 6.2 5.8 107 Deer Park 9700 7.4 7.7 96 9.0 11.3 80 Hobbs Park 10100 10.7 7.4 145 9.0 7.2 125 Kirwin 9550 12.0 5.3 226 10.7 6.7 160 Little Warm 9370 10.1 5.8 174 10.2 7.4 138 Owl Creek 8975 2.6 3.0 87 4.2 3.3 127 South Pass 9040 7.0 8.0 88 5.1 10.0 51 St. Lawrence Alt 8620 2.5 3.6 69 5.6 5.0 112 Togwotee Pass 9580 18.5 13.2 140 18.8 14.4 131 Townsend Creek 8700 4.4 4.5 98 5.9 6.6 89 ----- ----- Basin Index (%) 129 109 BIGHORN BASIN Bald Mtn. 9380 11.8 10.0 118 8.1 9.8 83 Bear Trap Meadow 8200 4.6 3.0 153 5.4 4.8 112 Bone Springs Div 9350 9.8 9.0 109 7.6 8.7 87 Grave Springs 8550 3.8 4.5 84 3.3 6.0 55 Kirwin 9550 12.0 5.3 226 10.7 6.7 160 Marquette 8760 3.6 -M * 6.7 -M * Middle Powder 7760 5.0 6.1 82 3.8 6.9 55 Owl Creek 8975 2.6 3.0 87 4.2 3.3 127 Powder River Pass 9480 8.7 5.9 147 7.6 7.2 106 Shell Creek 9580 11.8 8.6 137 8.3 8.0 104 Timber Creek 7950 2.2 2.8 79 1.6 4.3 37 ----- ----- Basin Index (%) 124 92 SHOSHONE RIVER Blackwater 9780 21.8 13.1 166 19.2 12.1 159 Evening Star 9200 24.0 14.3 168 25.3 16.3 155 Marquette 8760 3.6 -M * 6.7 -M * Sylvan Road 7120 8.1 7.1 114 12.9 10.9 118 Younts Peak 8350 -M 8.7 * -M 9.6 * ----- ----- Basin Index (%) 156 146 POWDER RIVER Bear Trap Meadow 8200 4.6 3.0 153 5.4 4.8 112 Cloud Peak Reservoir 9860 8.3 7.6 109 7.8 7.3 107 Grave Springs 8550 3.8 4.5 84 3.3 6.0 55 Hansen Sawmill 8360 3.9 3.6 108 5.2 4.6 113 Middle Powder 7760 5.0 6.1 82 3.8 6.9 55 Powder River Pass 9480 8.7 5.9 147 7.6 7.2 106 Soldier Park 8720 2.8 -M * 5.6 -M * ----- ----- Basin Index (%) 112 90 TONGUE RIVER Big Goose 7990 3.7 4.4 84 4.3 6.0 72 Bone Springs Div 9350 9.8 9.0 109 7.6 8.7 87 Burgess Junction 7880 4.6 6.1 75 4.4 6.9 64 Dome Lake 8880 6.2 6.4 97 5.9 7.7 77 Little Goose 8870 4.5 -M * 6.5 -M * Sucker Creek 8880 5.1 6.5 78 -M 8.0 * Tie Creek 6870 1.9 3.0 63 5.0 6.6 76 ----- ----- Basin Index (%) 88 76 BELLE FOURCHE Cole Canyon 5910 3.4 2.9 117 5.2 5.3 98 ----- ----- Basin Index (%) 117 98 CHEYENNE RIVER BASIN Blind Park 6890 4.1 4.1 100 6.2 7.2 86 North Rapid Creek 6130 4.4 3.8 116 4.8 5.8 83 ----- ----- Basin Index (%) 108 85 UPPER N. PLATTE Arapaho Ridge 10960 10.5 11.2 94 10.5 12.9 81 Blackhall Mtn 9820 14.0 -M * 14.4 -M * Columbine 9160 5.3 12.9 41 12.9 14.6 88 Divide Peak 8880 7.4 11.0 67 10.8 12.5 86 Joe Wright 10120 9.2 11.9 77 15.9 14.6 109 Laprele Creek 8375 3.4 5.2 65 4.9 6.9 71 Med Bow 10500 22.2 -M * 19.0 -M * North French Creek 10130 15.6 14.4 108 16.0 15.2 105 Never Summer 10280 9.4 10.9 86 8.1 -M * Old Battle 10000 12.8 16.3 79 12.7 20.3 63 Rawah 9020 6.0 5.6 107 9.0 8.5 106 Sage Creek Basin 7850 5.0 7.4 68 6.5 8.8 74 Sand Lake 10050 15.0 14.8 101 12.6 13.7 92 South Brush Creek 8440 5.6 6.4 88 7.3 8.7 84 Tower 10500 16.3 23.9 68 17.5 23.0 76 Webber Springs 9250 9.1 12.2 75 11.2 15.4 73 Willow Creek Pass 9540 7.2 6.5 111 7.9 7.6 104 Zirkel 9340 10.9 16.1 68 16.0 16.9 95 ----- ----- Basin Index (%) 80 86 SWEETWATER Deer Park 9700 7.4 7.7 96 9.0 11.3 80 Larsen Creek 9000 4.5 6.4 70 7.2 -M * South Pass 9040 7.0 8.0 88 5.1 10.0 51 ----- ----- Basin Index (%) 86 66 LOWER N. PLATTE Casper Mtn. 7900 4.4 6.9 64 4.0 8.4 48 Laprele Creek 8375 3.4 5.2 65 4.9 6.9 71 Reno Hill 8400 5.6 6.9 81 6.8 8.2 83 Windy Peak 7900 3.0 3.8 79 4.7 5.9 80 ----- ----- Basin Index (%) 72 69 LARAMIE RIVER Brooklyn Lake 10240 12.9 11.2 115 13.9 11.6 120 Cinnabar Park 9574 13.2 11.7 113 15.6 14.5 108 Crow Creek 8330 1.4 5.3 26 6.6 6.1 108 Deadman Hill 10220 10.8 8.6 126 10.6 9.4 113 Rawah 9020 6.0 5.6 107 9.0 8.5 106 Roach 9700 7.7 9.1 85 10.3 10.8 95 ----- ----- Basin Index (%) 101 108 S. PLATTE Black Mountain 8920 4.7 -M * 7.3 -M * Crow Creek 8330 1.4 5.3 26 6.6 6.1 108 Deadman Hill 10220 10.8 8.6 126 10.6 9.4 113 ----- ----- Basin Index (%) 88 111 LITTLE SNAKE RIVER Battle Mountain 7440 2.6 6.0 43 6.0 8.8 68 Divide Peak 8880 7.4 11.0 67 10.8 12.5 86 Elk River 8700 7.3 9.7 75 9.1 11.5 79 Little Snake River 8915 9.8 12.7 77 14.9 18.6 80 Old Battle 10000 12.8 16.3 79 12.7 20.3 63 Sage Creek Basin 7850 5.0 7.4 68 6.5 8.8 74 Sandstone RS 8150 4.5 7.2 62 5.1 10.9 47 Whiskey Park 8950 10.7 14.5 74 13.6 15.9 86 ----- ----- Basin Index (%) 71 73 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 7.0 113 8.1 7.6 107 Blind Bull Sum 8650 17.5 12.6 139 11.1 11.6 96 East Rim Divide 7930 6.3 6.0 105 6.7 6.9 97 Elkhart Park G.S. 9400 7.0 6.8 103 7.0 7.8 90 Gros Ventre Summit 8750 9.4 7.6 124 8.9 7.5 119 Gunsight Pass 9820 9.2 7.7 119 9.5 8.0 119 Kendall R.S. 7740 8.6 6.8 126 9.4 8.3 113 Loomis Park 8240 9.1 8.4 108 9.9 10.2 97 New Fork Lake 8340 6.7 6.0 112 6.2 6.4 97 Pocket Creek 9360 6.2 -M * 5.5 -M * Snider Basin 8060 6.5 6.5 100 8.3 8.3 100 Spring Creek Divide 9000 13.9 12.6 110 13.8 13.9 99 Triple Peak 8500 14.5 11.6 125 16.4 14.3 115 ----- ----- Basin Index (%) 117 104 LOWER GREEN RIVER Blacks Fork Jct 8869 3.9 -M * 5.2 -M * Buck Pasture 9632 6.2 -M * 6.9 -M * EF Blacks Fork GS 9360 3.4 -M * 3.7 -M * Hams Fork 7840 4.7 6.2 76 5.3 6.6 80 Hewinta 9500 4.0 5.0 80 6.1 7.8 78 Hickerson Park 9122 3.3 3.2 103 2.9 5.7 51 Hole-in-Rock 9168 3.0 3.6 83 3.5 5.4 65 Indian Creek 9425 11.6 13.1 89 8.8 12.6 70 Kelley R.S. 8180 7.1 7.8 91 8.2 10.5 78 Spirit Lk 10235 3.8 -M * 4.5 -M * Steel Creek Park 10158 7.1 7.5 95 7.3 9.0 81 ----- ----- Basin Index (%) 88 73 UPPER BEAR RIVER Bear River RS 8777 4.2 -M * 5.8 -M * Bug Lake 7987 8.5 9.0 94 9.6 11.2 86 Burts Miller Ranch 8000 2.4 -M * 3.6 -M * Chalk Creek #1 9171 7.7 11.9 65 8.7 14.1 62 Hayden Fork 9130 6.5 7.6 86 8.3 11.8 70 Kelley R.S. 8180 7.1 7.8 91 8.2 10.5 78 Lily Lake 9133 5.8 6.7 87 6.0 9.7 62 Monte Cristo 8932 11.3 13.9 81 11.2 14.7 76 Salt River Summit 7640 5.4 6.8 79 7.4 9.6 77 ----- ----- Basin Index (%) 82 73 ----------------------------------------------------------------------------- -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.