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: DECEMBER 17 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 8.8 5.6 157 16.1 8.2 196 Black Bear 8170 12.9 13.5 96 22.0 14.4 153 Blind Bull Sum 8650 12.1 7.4 164 13.2 7.7 171 Cottonwood Creek 7670 8.4 6.6 127 15.4 9.1 169 East Rim Divide 7930 4.7 3.2 147 8.0 4.5 178 Grand Targhee 9260 20.8 13.7 152 19.6 12.3 159 Granite Creek 6770 7.4 4.4 168 13.8 7.5 184 Grassy Lake 7265 12.3 9.5 129 24.0 13.5 178 Gros Ventre Summit 8750 5.2 4.7 111 9.4 5.1 184 Gunsight Pass 9820 5.6 4.2 133 9.9 5.2 190 Lewis Lake Divide 7850 10.6 9.7 109 21.6 13.6 159 Phillips Bench 8200 8.5 8.3 102 17.6 10.2 173 Salt River Summit 7760 4.6 3.4 135 10.3 6.0 172 Snake River Station 6920 8.4 4.9 171 17.0 9.0 189 Spring Creek Divide 9000 10.5 7.8 135 15.8 8.8 180 Thumb Divide 7980 5.3 4.5 118 11.4 7.2 158 Togwotee Pass 9580 11.6 9.1 127 15.2 9.5 160 Two Ocean Plateau 9240 16.1 10.6 152 17.7 10.6 167 Willow Creek 8380 9.7 8.3 117 20.4 12.8 159 Younts Peak 8350 6.3 5.5 115 10.5 6.4 164 ----- ----- Basin Index (%) 131 170 MADISON-GALLATIN Black Bear 8170 12.9 13.5 96 22.0 14.4 153 Canyon 7870 5.5 4.1 134 11.3 6.4 177 Madison Plateau 7750 6.9 7.9 87 16.6 10.0 166 West Yellowstone 6700 3.5 3.3 106 11.1 5.7 195 Whiskey Creek 6800 4.0 4.7 85 11.7 8.0 146 ----- ----- Basin Index (%) 98 163 YELLOWSTONE Beartooth Lake 9360 10.2 7.9 129 -M 7.5 * Burnt Mtn 5880 3.1 1.6 194 6.7 6.1 110 Canyon 7870 5.5 4.1 134 11.3 6.4 177 Cole Creek 7850 3.9 5.6 70 4.1 5.7 72 Evening Star 9200 12.0 9.0 133 17.9 10.9 164 Fisher Creek 9100 11.7 11.8 99 16.8 12.2 138 Northeast Entrance 7350 4.1 2.7 152 9.1 5.2 175 Parker Peak 9400 10.3 7.9 130 13.4 7.2 186 Sylvan Lake 8420 8.0 7.3 110 17.9 9.3 192 Thumb Divide 7980 5.3 4.5 118 11.4 7.2 158 Two Ocean Plateau 9240 16.1 10.6 152 17.7 10.6 167 White Mill 8700 9.8 8.0 122 13.1 9.3 141 Wolverine 7650 5.1 3.4 150 8.2 5.2 158 ----- ----- Basin Index (%) 125 155 WIND RIVER Burroughs Creek 8750 6.8 -M * 8.7 -M * Castle Creek 8400 3.7 -M * 5.6 -M * Cold Springs 9630 3.2 2.7 119 5.4 4.4 123 Deer Park 9700 -M 5.0 * -M 7.3 * Hobbs Park 10100 6.7 5.8 116 7.4 5.4 137 Kirwin 9550 5.7 4.0 142 7.8 4.8 162 Little Warm 9370 3.0 3.7 81 7.6 5.2 146 Owl Creek 8975 2.0 2.2 91 3.4 2.6 131 South Pass 9040 7.4 5.3 140 8.0 7.1 113 St. Lawrence Alt 8620 1.3 2.6 50 4.9 3.8 129 Togwotee Pass 9580 11.6 9.1 127 15.2 9.5 160 Townsend Creek 8700 2.8 3.3 85 5.3 5.2 102 ----- ----- Basin Index (%) 113 135 BIGHORN BASIN Bald Mtn. 9380 8.9 6.9 129 7.3 6.6 111 Bear Trap Meadow 8200 -M 2.1 * 2.8 3.7 76 Bone Springs Div 9350 6.2 6.2 100 6.8 6.0 113 Grave Springs 8550 2.1 2.5 84 3.5 4.3 81 Kirwin 9550 5.7 4.0 142 7.8 4.8 162 Marquette 8760 3.7 -M * 6.2 -M * Middle Powder 7760 2.4 3.7 65 2.9 5.3 55 Owl Creek 8975 2.0 2.2 91 3.4 2.6 131 Powder River Pass 9480 1.5 3.7 41 3.9 5.0 78 Shell Creek 9580 6.6 6.0 110 5.5 5.6 98 Timber Creek 7950 2.4 1.9 126 3.9 3.6 108 ----- ----- Basin Index (%) 102 101 SHOSHONE RIVER Blackwater 9780 13.8 8.8 157 16.6 8.5 195 Evening Star 9200 12.0 9.0 133 17.9 10.9 164 Marquette 8760 3.7 -M * 6.2 -M * Sylvan Road 7120 5.5 4.1 134 14.8 7.6 195 Younts Peak 8350 6.3 5.5 115 10.5 6.4 164 ----- ----- Basin Index (%) 137 179 POWDER RIVER Bear Trap Meadow 8200 -M 2.1 * 2.8 3.7 76 Cloud Peak Reservoir 9860 3.2 4.9 65 5.1 5.5 93 Grave Springs 8550 2.1 2.5 84 3.5 4.3 81 Hansen Sawmill 8360 2.3 2.2 105 4.0 3.6 111 Middle Powder 7760 2.4 3.7 65 2.9 5.3 55 Powder River Pass 9480 1.5 3.7 41 3.9 5.0 78 Soldier Park 8720 1.9 -M * 4.4 -M * ----- ----- Basin Index (%) 68 81 TONGUE RIVER Big Goose 7990 2.8 3.0 93 4.1 4.6 89 Bone Springs Div 9350 6.2 6.2 100 6.8 6.0 113 Burgess Junction 7880 3.3 3.8 87 4.6 5.0 92 Dome Lake 8880 2.9 4.4 66 5.7 5.9 97 Little Goose 8870 3.3 -M * 4.9 -M * Sucker Creek 8880 4.0 4.1 98 4.4 5.7 77 Tie Creek 6870 2.5 1.1 227 4.5 4.8 94 ----- ----- Basin Index (%) 96 94 BELLE FOURCHE Cole Canyon 5910 2.0 1.0 200 3.1 4.1 76 ----- ----- Basin Index (%) 200 76 CHEYENNE RIVER BASIN Blind Park 6890 2.8 2.1 133 4.1 5.1 80 North Rapid Creek 6130 2.4 2.4 100 2.6 4.3 60 ----- ----- Basin Index (%) 116 71 UPPER N. PLATTE Arapaho Ridge 10960 9.2 7.5 123 11.0 9.1 121 Blackhall Mtn 9820 10.8 -M * 12.9 -M * Columbine 9160 8.7 6.7 130 10.8 9.4 115 Divide Peak 8880 5.9 6.3 94 7.7 8.5 91 Joe Wright 10120 6.0 7.9 76 11.0 10.2 108 Laprele Creek 8375 3.2 3.0 107 3.5 5.0 70 Med Bow 10500 13.5 -M * 14.2 -M * North French Creek 10130 8.5 9.4 90 10.4 9.9 105 Never Summer 10280 7.9 6.8 116 8.2 -M * Old Battle 10000 10.2 10.3 99 11.2 13.3 84 Rawah 9020 4.7 3.6 131 7.2 6.1 118 Sage Creek Basin 7850 3.9 4.1 95 5.4 5.8 93 Sand Lake 10050 9.4 9.3 101 9.0 9.3 97 South Brush Creek 8440 3.2 3.8 84 4.7 6.0 78 Tower 10500 12.6 16.0 79 15.6 15.2 103 Webber Springs 9250 7.9 7.9 100 11.1 10.3 108 Willow Creek Pass 9540 6.5 4.5 144 7.5 5.5 136 Zirkel 9340 10.2 7.5 136 13.9 11.1 125 ----- ----- Basin Index (%) 103 104 SWEETWATER Deer Park 9700 -M 5.0 * -M 7.3 * Larsen Creek 9000 5.6 3.7 151 9.9 -M * South Pass 9040 7.4 5.3 140 8.0 7.1 113 ----- ----- Basin Index (%) 144 113* LOWER N. PLATTE Casper Mtn. 7900 3.4 4.7 72 3.9 6.4 61 Laprele Creek 8375 3.2 3.0 107 3.5 5.0 70 Reno Hill 8400 -M 4.9 * -M 6.1 * Windy Peak 7900 3.1 2.5 124 3.7 4.4 84 ----- ----- Basin Index (%) 95 70 LARAMIE RIVER Brooklyn Lake 10240 6.9 6.5 106 7.1 7.6 93 Cinnabar Park 9574 6.2 7.4 84 8.9 9.2 97 Crow Creek 8330 2.2 3.6 61 3.6 4.4 82 Deadman Hill 10220 6.8 5.6 121 7.3 6.5 112 Rawah 9020 4.7 3.6 131 7.2 6.1 118 Roach 9700 -M 5.2 * -M 7.3 * ----- ----- Basin Index (%) 100 101 S. PLATTE Black Mountain 8920 3.5 -M * 5.1 -M * Crow Creek 8330 2.2 3.6 61 3.6 4.4 82 Deadman Hill 10220 6.8 5.6 121 7.3 6.5 112 ----- ----- Basin Index (%) 98 100 LITTLE SNAKE RIVER Battle Mountain 7440 3.3 2.8 118 5.0 5.8 86 Divide Peak 8880 5.9 6.3 94 7.7 8.5 91 Elk River 8700 7.4 4.9 151 8.2 7.4 111 Little Snake River 8915 -M 6.0 * -M 11.9 * Old Battle 10000 10.2 10.3 99 11.2 13.3 84 Sage Creek Basin 7850 3.9 4.1 95 5.4 5.8 93 Sandstone RS 8150 4.6 3.6 128 4.5 7.1 63 Whiskey Park 8950 8.3 7.5 111 11.4 9.8 116 ----- ----- Basin Index (%) 110 93 UPPER GREEN RIVER Big Sandy Opening 9080 7.3 4.6 159 10.0 5.2 192 Blind Bull Sum 8650 12.1 7.4 164 13.2 7.7 171 East Rim Divide 7930 4.7 3.2 147 8.0 4.5 178 Elkhart Park G.S. 9400 4.4 4.3 102 9.8 5.3 185 Gros Ventre Summit 8750 5.2 4.7 111 9.4 5.1 184 Gunsight Pass 9820 5.6 4.2 133 9.9 5.2 190 Kendall R.S. 7740 6.6 3.6 183 10.7 5.3 202 Loomis Park 8240 7.6 4.8 158 12.9 6.5 198 New Fork Lake 8340 5.2 3.4 153 5.8 4.2 138 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 4.9 3.8 129 10.1 5.2 194 Spring Creek Divide 9000 10.5 7.8 135 15.8 8.8 180 Triple Peak 8500 12.2 6.6 185 17.0 9.0 189 ----- ----- Basin Index (%) 148 184 LOWER GREEN RIVER Blacks Fork Jct 8870 4.1 -M * 5.8 -M * Buck Pasture 9700 5.8 -M * 8.4 -M * EF Blacks Fork GS 9360 5.2 -M * 5.8 -M * Hams Fork 7840 4.4 3.4 129 8.1 4.3 188 Hewinta 9519 4.0 2.8 143 6.3 5.7 111 Hickerson Park 9145 3.4 2.0 170 3.9 4.4 89 Hole-in-Rock 9150 2.2 2.3 96 4.2 4.1 102 Indian Creek 9425 10.0 7.9 127 13.8 7.9 175 Kelley R.S. 8180 7.1 4.5 158 12.6 6.8 185 Spirit Lk 10235 4.3 -M * 6.7 -M * Steel Creek Park 10200 5.8 5.4 107 7.7 6.5 118 ----- ----- Basin Index (%) 130 143 UPPER BEAR RIVER Bear River RS 8777 4.1 -M * 6.0 -M * Bug Lake 7950 9.2 5.2 177 10.4 7.4 141 Burts Miller Ranch 8000 2.4 -M * 3.3 -M * Chalk Creek #1 8993 9.7 8.3 117 11.8 9.8 120 Hayden Fork 9212 7.0 4.2 167 10.7 8.0 134 Kelley R.S. 8180 7.1 4.5 158 12.6 6.8 185 Lily Lake 9156 4.5 4.3 105 6.7 6.9 97 Monte Cristo 8960 9.3 8.0 116 12.1 9.7 125 Salt River Summit 7760 4.6 3.4 135 10.3 6.0 172 ----- ----- Basin Index (%) 136 137 ----------------------------------------------------------------------------- -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.