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 21 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 15.4 10.0 154 23.2 12.6 184 Black Bear 8170 21.7 21.8 100 30.8 22.4 138 Blind Bull Sum 8650 21.5 12.7 169 -M 11.7 * Cottonwood Creek 7670 14.9 11.2 133 21.1 14.4 147 East Rim Divide 7930 10.2 6.1 167 12.5 7.0 179 Grand Targhee 9260 27.4 21.5 127 25.6 18.5 138 Granite Creek 6770 15.0 9.2 163 20.7 12.2 170 Grassy Lake 7265 22.5 17.5 129 33.8 21.5 157 Gros Ventre Summit 8750 9.3 7.7 121 13.6 7.5 181 Gunsight Pass 9820 10.1 7.7 131 14.0 8.1 173 Lewis Lake Divide 7850 19.4 17.4 111 31.1 21.0 148 Phillips Bench 8200 17.5 15.6 112 26.5 16.4 162 Salt River Summit 7760 11.2 6.9 162 16.5 9.7 170 Snake River Station 6920 13.9 9.4 148 23.0 13.9 165 Spring Creek Divide 9000 19.3 12.6 153 22.6 14.0 161 Thumb Divide 7980 10.1 8.4 120 15.6 11.0 142 Togwotee Pass 9580 17.6 13.2 133 21.3 14.5 147 Two Ocean Plateau 9240 23.3 15.8 147 23.7 15.8 150 Willow Creek 8380 18.5 15.2 122 29.3 19.6 149 Younts Peak 8350 12.1 8.8 138 16.5 9.6 172 ----- ----- Basin Index (%) 133 156 MADISON-GALLATIN Black Bear 8170 21.7 21.8 100 30.8 22.4 138 Canyon 7870 9.2 7.5 123 15.4 9.7 159 Madison Plateau 7750 13.0 13.2 98 22.2 15.7 141 West Yellowstone 6700 7.5 6.6 114 14.9 8.7 171 Whiskey Creek 6800 8.4 8.8 95 16.3 12.1 135 ----- ----- Basin Index (%) 103 145 YELLOWSTONE Beartooth Lake 9360 15.2 12.8 119 11.5 11.6 99 Burnt Mtn 5880 4.5 2.3 196 8.4 7.5 112 Canyon 7870 9.2 7.5 123 15.4 9.7 159 Cole Creek 7850 6.1 7.5 81 5.2 7.2 72 Evening Star 9200 18.3 14.4 127 24.6 16.4 150 Fisher Creek 9100 17.9 19.2 93 23.1 18.8 123 Northeast Entrance 7350 6.5 5.7 114 11.6 7.6 153 Parker Peak 9400 16.0 12.0 133 18.8 10.5 179 Sylvan Lake 8420 12.6 11.6 109 23.0 13.6 169 Thumb Divide 7980 10.1 8.4 120 15.6 11.0 142 Two Ocean Plateau 9240 23.3 15.8 147 23.7 15.8 150 White Mill 8700 14.9 13.4 111 17.9 14.0 128 Wolverine 7650 -M 6.3 * -M 7.6 * ----- ----- Basin Index (%) 118 138 WIND RIVER Burroughs Creek 8750 11.7 -M * 14.5 -M * Castle Creek 8400 6.6 -M * 8.7 -M * Cold Springs 9630 5.9 4.2 140 8.4 5.8 145 Deer Park 9700 17.2 7.9 218 20.8 11.4 182 Hobbs Park 10100 11.9 7.5 159 11.8 7.2 164 Kirwin 9550 9.4 5.3 177 12.4 6.8 182 Little Warm 9370 6.4 5.8 110 11.5 7.5 153 Owl Creek 8975 3.5 3.0 117 5.1 3.3 155 South Pass 9040 16.4 8.1 202 16.1 10.1 159 St. Lawrence Alt 8620 3.0 3.7 81 7.1 5.0 142 Togwotee Pass 9580 17.6 13.2 133 21.3 14.5 147 Townsend Creek 8700 6.3 4.6 137 9.2 6.7 137 ----- ----- Basin Index (%) 154 158 BIGHORN BASIN Bald Mtn. 9380 11.9 10.1 118 10.5 9.8 107 Bear Trap Meadow 8200 2.8 3.1 90 4.4 4.9 90 Bone Springs Div 9350 9.2 9.1 101 9.7 8.8 110 Grave Springs 8550 3.4 4.6 74 4.4 6.0 73 Kirwin 9550 9.4 5.3 177 12.4 6.8 182 Marquette 8760 4.4 -M * 7.8 -M * Middle Powder 7760 4.3 6.1 70 4.9 6.9 71 Owl Creek 8975 3.5 3.0 117 5.1 3.3 155 Powder River Pass 9480 3.6 5.9 61 6.5 7.2 90 Shell Creek 9580 9.8 8.6 114 8.0 8.0 100 Timber Creek 7950 3.3 2.8 118 4.7 4.3 109 ----- ----- Basin Index (%) 104 107 SHOSHONE RIVER Blackwater 9780 19.0 13.1 145 22.8 12.2 187 Evening Star 9200 18.3 14.4 127 24.6 16.4 150 Marquette 8760 4.4 -M * 7.8 -M * Sylvan Road 7120 9.2 7.2 128 19.3 11.0 175 Younts Peak 8350 12.1 8.8 138 16.5 9.6 172 ----- ----- Basin Index (%) 135 169 POWDER RIVER Bear Trap Meadow 8200 2.8 3.1 90 4.4 4.9 90 Cloud Peak Reservoir 9860 6.8 7.6 89 8.7 7.4 118 Grave Springs 8550 3.4 4.6 74 4.4 6.0 73 Hansen Sawmill 8360 4.5 3.7 122 6.3 4.7 134 Middle Powder 7760 4.3 6.1 70 4.9 6.9 71 Powder River Pass 9480 3.6 5.9 61 6.5 7.2 90 Soldier Park 8720 7.2 -M * 6.5 -M * ----- ----- Basin Index (%) 82 95 TONGUE RIVER Big Goose 7990 5.1 4.4 116 6.1 6.0 102 Bone Springs Div 9350 9.2 9.1 101 9.7 8.8 110 Burgess Junction 7880 5.3 6.2 85 6.5 7.0 93 Dome Lake 8880 6.2 6.4 97 7.7 7.8 99 Little Goose 8870 5.5 -M * 7.7 -M * Sucker Creek 8880 6.2 6.6 94 6.6 8.0 82 Tie Creek 6870 3.7 3.1 119 6.7 6.7 100 ----- ----- Basin Index (%) 100 98 BELLE FOURCHE Cole Canyon 5910 3.2 3.0 107 4.2 5.3 79 ----- ----- Basin Index (%) 107 79 CHEYENNE RIVER BASIN Blind Park 6890 3.8 4.1 93 4.9 7.2 68 North Rapid Creek 6130 4.0 3.8 105 4.3 5.8 74 ----- ----- Basin Index (%) 99 71 UPPER N. PLATTE Arapaho Ridge 10960 17.9 11.3 158 18.7 13.0 144 Blackhall Mtn 9820 23.5 -M * 24.6 -M * Columbine 9160 17.9 13.0 138 19.7 14.7 134 Divide Peak 8880 12.2 11.1 110 14.6 12.5 117 Joe Wright 10120 13.9 12.0 116 19.4 14.7 132 Laprele Creek 8375 6.5 5.2 125 6.2 7.0 89 Med Bow 10500 24.6 -M * 23.6 -M * North French Creek 10130 15.6 14.5 108 17.2 15.3 112 Never Summer 10280 -M 11.0 * -M -M * Old Battle 10000 22.9 16.5 139 24.8 20.4 122 Rawah 9020 9.4 5.7 165 11.9 8.6 138 Sage Creek Basin 7850 9.9 7.5 132 10.3 8.8 117 Sand Lake 10050 18.2 15.0 121 17.6 13.8 128 South Brush Creek 8440 6.6 6.5 102 7.8 8.7 90 Tower 10500 28.2 24.2 117 30.6 23.2 132 Webber Springs 9250 18.1 12.3 147 22.0 15.5 142 Willow Creek Pass 9540 12.6 6.6 191 13.3 7.6 175 Zirkel 9340 25.8 16.3 158 26.5 16.9 157 ----- ----- Basin Index (%) 133 130 SWEETWATER Deer Park 9700 17.2 7.9 218 20.8 11.4 182 Larsen Creek 9000 11.5 6.4 180 14.9 -M * South Pass 9040 16.4 8.1 202 16.1 10.1 159 ----- ----- Basin Index (%) 201 172 LOWER N. PLATTE Casper Mtn. 7900 5.9 6.9 86 6.2 8.4 74 Laprele Creek 8375 6.5 5.2 125 6.2 7.0 89 Reno Hill 8400 -M 7.0 * -M 8.3 * Windy Peak 7900 5.1 3.8 134 5.8 5.9 98 ----- ----- Basin Index (%) 110 85 LARAMIE RIVER Brooklyn Lake 10240 15.2 11.2 136 14.1 11.7 121 Cinnabar Park 9574 12.6 11.9 106 15.4 14.5 106 Crow Creek 8330 4.0 5.4 74 5.7 6.1 93 Deadman Hill 10220 13.6 8.7 156 13.5 9.4 144 Rawah 9020 9.4 5.7 165 11.9 8.6 138 Roach 9700 11.7 9.2 127 13.9 10.8 129 ----- ----- Basin Index (%) 128 122 S. PLATTE Black Mountain 8920 7.0 -M * 8.2 -M * Crow Creek 8330 4.0 5.4 74 5.7 6.1 93 Deadman Hill 10220 13.6 8.7 156 13.5 9.4 144 ----- ----- Basin Index (%) 125 124 LITTLE SNAKE RIVER Battle Mountain 7440 8.1 6.1 133 10.7 8.9 120 Divide Peak 8880 12.2 11.1 110 14.6 12.5 117 Elk River 8700 14.9 9.8 152 14.8 11.6 128 Little Snake River 8915 20.9 12.9 162 26.3 18.7 141 Old Battle 10000 22.9 16.5 139 24.8 20.4 122 Sage Creek Basin 7850 9.9 7.5 132 10.3 8.8 117 Sandstone RS 8150 10.0 7.2 139 10.8 10.9 99 Whiskey Park 8950 18.3 14.7 124 20.9 16.0 131 ----- ----- Basin Index (%) 137 124 UPPER GREEN RIVER Big Sandy Opening 9080 12.4 7.1 175 14.8 7.7 192 Blind Bull Sum 8650 21.5 12.7 169 -M 11.7 * East Rim Divide 7930 10.2 6.1 167 12.5 7.0 179 Elkhart Park G.S. 9400 9.2 6.9 133 14.5 7.8 186 Gros Ventre Summit 8750 9.3 7.7 121 13.6 7.5 181 Gunsight Pass 9820 10.1 7.7 131 14.0 8.1 173 Kendall R.S. 7740 11.8 6.8 174 16.1 8.4 192 Loomis Park 8240 14.2 8.5 167 19.3 10.2 189 New Fork Lake 8340 9.4 6.2 152 9.8 6.4 153 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 11.4 6.6 173 16.1 8.4 192 Spring Creek Divide 9000 19.3 12.6 153 22.6 14.0 161 Triple Peak 8500 20.9 11.7 179 23.1 14.4 160 ----- ----- Basin Index (%) 159 177 LOWER GREEN RIVER Blacks Fork Jct 8870 7.8 -M * 10.0 -M * Buck Pasture 9700 12.1 -M * 14.7 -M * EF Blacks Fork GS 9360 8.6 -M * 9.3 -M * Hams Fork 7840 10.3 6.3 163 12.3 6.7 184 Hewinta 9519 8.2 5.1 161 10.5 7.9 133 Hickerson Park 9145 5.7 3.3 173 6.0 5.7 105 Hole-in-Rock 9150 4.7 3.7 127 6.6 5.4 122 Indian Creek 9425 20.0 13.3 150 -M 12.7 * Kelley R.S. 8180 13.9 7.9 176 19.1 10.5 182 Spirit Lk 10235 8.6 -M * 10.2 -M * Steel Creek Park 10200 11.0 7.6 145 12.7 9.0 141 ----- ----- Basin Index (%) 156 149 UPPER BEAR RIVER Bear River RS 8777 8.9 -M * 10.9 -M * Bug Lake 7950 -M 9.1 * -M 11.3 * Burts Miller Ranch 8000 5.0 -M * 5.5 -M * Chalk Creek #1 8993 19.8 12.0 165 -M 14.2 * Hayden Fork 9212 13.9 7.7 181 18.4 12.0 153 Kelley R.S. 8180 13.9 7.9 176 19.1 10.5 182 Lily Lake 9156 10.4 6.7 155 12.1 9.8 123 Monte Cristo 8960 19.1 14.0 136 -M 14.8 * Salt River Summit 7760 11.2 6.9 162 16.5 9.7 170 ----- ----- Basin Index (%) 160 157* ----------------------------------------------------------------------------- -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.