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 MONDAY: MARCH 6 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 25.0 13.7 182 31.9 17.8 179 Black Bear 8170 38.4 30.5 126 44.7 32.0 140 Blind Bull Sum 8650 37.6 18.7 201 -M 16.5 * Cottonwood Creek 7670 25.5 17.9 142 32.4 20.2 160 East Rim Divide 7930 17.8 8.8 202 19.1 9.9 193 Grand Targhee 9260 37.4 31.0 121 32.8 25.3 130 Granite Creek 6770 28.4 14.2 200 -M 17.1 * Grassy Lake 7265 33.2 26.9 123 46.0 30.4 151 Gros Ventre Summit 8750 -M 10.4 * -M 10.5 * Gunsight Pass 9820 18.6 11.1 168 21.3 11.1 192 Lewis Lake Divide 7850 33.6 25.7 131 42.4 29.9 142 Phillips Bench 8200 31.7 20.4 155 39.4 23.5 168 Salt River Summit 7760 19.5 10.9 179 25.2 13.9 181 Snake River Station 6920 20.5 14.7 139 30.5 19.2 159 Spring Creek Divide 9000 34.0 19.3 176 -M 19.9 * Thumb Divide 7980 20.3 12.6 161 21.7 15.3 142 Togwotee Pass 9580 28.3 18.8 151 32.4 20.0 162 Two Ocean Plateau 9240 -M 22.1 * -M 22.5 * Willow Creek 8380 28.8 23.4 123 42.2 27.7 152 Younts Peak 8350 23.1 12.0 192 25.7 13.0 198 ----- ----- Basin Index (%) 152 158 MADISON-GALLATIN Black Bear 8170 38.4 30.5 126 44.7 32.0 140 Canyon 7870 15.7 11.1 141 21.8 13.5 161 Madison Plateau 7750 23.4 18.4 127 31.1 22.1 141 West Yellowstone 6700 12.0 9.2 130 20.1 12.0 168 Whiskey Creek 6800 14.3 12.5 114 22.8 16.9 135 ----- ----- Basin Index (%) 127 146 YELLOWSTONE Beartooth Lake 9360 26.2 17.7 148 21.6 16.3 133 Burnt Mtn 5880 5.5 4.3 128 11.2 9.8 114 Canyon 7870 15.7 11.1 141 21.8 13.5 161 Cole Creek 7850 8.6 10.7 80 6.3 9.4 67 Evening Star 9200 31.1 20.1 155 34.1 22.8 150 Fisher Creek 9100 33.6 26.3 128 37.8 26.4 143 Northeast Entrance 7350 10.6 8.5 125 16.2 10.2 159 Parker Peak 9400 27.2 16.3 167 23.4 14.5 161 Sylvan Lake 8420 20.9 16.4 127 32.1 18.5 174 Thumb Divide 7980 20.3 12.6 161 21.7 15.3 142 Two Ocean Plateau 9240 -M 22.1 * -M 22.5 * White Mill 8700 26.0 18.8 138 27.6 19.7 140 Wolverine 7650 13.4 8.8 152 18.0 10.2 176 ----- ----- Basin Index (%) 139 146 WIND RIVER Burroughs Creek 8750 20.9 -M * 22.9 -M * Castle Creek 8400 11.5 -M * 13.6 -M * Cold Springs 9630 12.0 5.7 211 14.2 7.8 182 Deer Park 9700 28.2 11.2 252 30.1 15.6 193 Hobbs Park 10100 21.8 10.4 210 19.9 10.0 199 Kirwin 9550 16.5 7.4 223 19.2 9.1 211 Little Warm 9370 14.5 8.3 175 20.0 10.2 196 Owl Creek 8975 6.8 4.1 166 8.5 4.4 193 South Pass 9040 25.9 12.0 216 23.2 14.0 166 St. Lawrence Alt 8620 7.3 5.6 130 12.0 6.8 176 Togwotee Pass 9580 28.3 18.8 151 32.4 20.0 162 Townsend Creek 8700 12.4 7.1 175 15.6 9.0 173 ----- ----- Basin Index (%) 192 183 BIGHORN BASIN Bald Mtn. 9380 15.5 15.5 100 13.6 13.5 101 Bear Trap Meadow 8200 4.6 4.6 100 5.8 6.4 91 Bone Springs Div 9350 13.7 12.9 106 13.4 12.2 110 Grave Springs 8550 5.3 7.1 75 5.9 8.2 72 Kirwin 9550 16.5 7.4 223 19.2 9.1 211 Marquette 8760 7.7 -M * 11.4 -M * Middle Powder 7760 6.1 8.4 73 6.1 9.0 68 Owl Creek 8975 6.8 4.1 166 8.5 4.4 193 Powder River Pass 9480 6.4 8.2 78 9.3 9.9 94 Shell Creek 9580 13.2 12.0 110 10.4 10.9 95 Timber Creek 7950 5.4 3.9 138 6.9 5.4 128 ----- ----- Basin Index (%) 111 111 SHOSHONE RIVER Blackwater 9780 31.1 18.1 172 34.4 16.6 207 Evening Star 9200 31.1 20.1 155 34.1 22.8 150 Marquette 8760 7.7 -M * 11.4 -M * Sylvan Road 7120 14.3 9.8 146 25.8 14.3 180 Younts Peak 8350 23.1 12.0 192 25.7 13.0 198 ----- ----- Basin Index (%) 166 180 POWDER RIVER Bear Trap Meadow 8200 4.6 4.6 100 5.8 6.4 91 Cloud Peak Reservoir 9860 10.3 11.0 94 11.7 9.9 118 Grave Springs 8550 5.3 7.1 75 5.9 8.2 72 Hansen Sawmill 8360 6.9 4.8 144 8.8 6.3 140 Middle Powder 7760 6.1 8.4 73 6.1 9.0 68 Powder River Pass 9480 6.4 8.2 78 9.3 9.9 94 Soldier Park 8720 10.1 -M * 8.6 -M * ----- ----- Basin Index (%) 90 96 TONGUE RIVER Big Goose 7990 7.4 6.5 114 8.3 8.1 102 Bone Springs Div 9350 13.7 12.9 106 13.4 12.2 110 Burgess Junction 7880 7.5 8.8 85 8.6 9.4 91 Dome Lake 8880 9.9 9.0 110 10.8 10.2 106 Little Goose 8870 8.0 -M * 10.4 -M * Sucker Creek 8880 8.9 9.5 94 9.0 10.9 83 Tie Creek 6870 5.0 4.6 109 9.1 8.7 105 ----- ----- Basin Index (%) 102 99 BELLE FOURCHE Cole Canyon 5910 3.0 4.9 61 5.8 7.3 79 ----- ----- Basin Index (%) 61 79 CHEYENNE RIVER BASIN Blind Park 6890 4.4 6.5 68 6.9 9.7 71 North Rapid Creek 6130 4.7 6.1 77 5.9 7.8 76 ----- ----- Basin Index (%) 72 73 UPPER N. PLATTE Arapaho Ridge 10960 22.7 17.2 132 22.9 18.2 126 Blackhall Mtn 9820 33.6 -M * 32.2 -M * Columbine 9160 23.5 20.5 115 24.9 20.9 119 Divide Peak 8880 18.3 16.5 111 20.3 17.4 117 Joe Wright 10120 18.0 17.6 102 25.0 20.7 121 Laprele Creek 8375 10.7 7.9 135 10.1 9.7 104 Med Bow 10500 34.2 -M * 30.5 -M * North French Creek 10130 22.9 21.6 106 23.6 21.6 109 Never Summer 10280 20.8 16.5 126 17.0 -M * Old Battle 10000 33.9 24.7 137 34.6 28.8 120 Rawah 9020 11.8 9.0 131 14.8 11.2 132 Sage Creek Basin 7850 15.3 10.9 140 14.7 12.1 121 Sand Lake 10050 26.4 21.7 122 24.2 19.6 123 South Brush Creek 8440 10.5 10.8 97 11.1 12.1 92 Tower 10500 38.8 37.4 104 39.3 32.9 119 Webber Springs 9250 26.9 19.4 139 30.3 21.9 138 Willow Creek Pass 9540 16.0 9.9 162 16.8 10.7 157 Zirkel 9340 38.9 24.2 161 38.7 23.8 163 ----- ----- Basin Index (%) 124 125 SWEETWATER Deer Park 9700 28.2 11.2 252 30.1 15.6 193 Larsen Creek 9000 18.3 9.9 185 20.6 -M * South Pass 9040 25.9 12.0 216 23.2 14.0 166 ----- ----- Basin Index (%) 219 180 LOWER N. PLATTE Casper Mtn. 7900 10.0 10.9 92 9.3 11.5 81 Laprele Creek 8375 10.7 7.9 135 10.1 9.7 104 Reno Hill 8400 10.2 10.8 94 10.4 11.6 90 Windy Peak 7900 9.4 6.1 154 9.6 8.1 119 ----- ----- Basin Index (%) 113 96 LARAMIE RIVER Brooklyn Lake 10240 22.3 15.9 140 20.0 16.7 120 Cinnabar Park 9574 17.5 17.5 100 19.7 20.0 98 Crow Creek 8330 4.9 6.9 71 7.5 8.2 91 Deadman Hill 10220 18.6 12.7 146 17.7 13.4 132 Rawah 9020 11.8 9.0 131 14.8 11.2 132 Roach 9700 15.2 12.8 119 17.9 15.3 117 ----- ----- Basin Index (%) 121 115 S. PLATTE Black Mountain 8920 9.3 -M * 10.3 -M * Crow Creek 8330 4.9 6.9 71 7.5 8.2 91 Deadman Hill 10220 18.6 12.7 146 17.7 13.4 132 ----- ----- Basin Index (%) 120 117 LITTLE SNAKE RIVER Battle Mountain 7440 10.8 10.1 107 14.9 12.5 119 Divide Peak 8880 18.3 16.5 111 20.3 17.4 117 Elk River 8700 20.0 16.3 123 18.7 16.5 113 Little Snake River 8915 30.1 20.0 150 34.3 25.4 135 Old Battle 10000 33.9 24.7 137 34.6 28.8 120 Sage Creek Basin 7850 15.3 10.9 140 14.7 12.1 121 Sandstone RS 8150 11.9 11.3 105 14.7 15.5 95 Whiskey Park 8950 26.1 22.4 117 27.1 23.1 117 ----- ----- Basin Index (%) 126 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.4 10.4 187 20.9 10.8 194 Blind Bull Sum 8650 37.6 18.7 201 -M 16.5 * East Rim Divide 7930 17.8 8.8 202 19.1 9.9 193 Elkhart Park G.S. 9400 16.5 9.7 170 20.8 10.9 191 Gros Ventre Summit 8750 -M 10.4 * -M 10.5 * Gunsight Pass 9820 18.6 11.1 168 21.3 11.1 192 Kendall R.S. 7740 21.5 10.1 213 24.6 12.1 203 Loomis Park 8240 25.0 12.3 203 27.7 14.5 191 New Fork Lake 8340 15.3 8.6 178 15.3 9.1 168 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.3 10.3 187 24.0 11.9 202 Spring Creek Divide 9000 34.0 19.3 176 -M 19.9 * Triple Peak 8500 33.3 17.8 187 35.3 20.9 169 ----- ----- Basin Index (%) 188 188 LOWER GREEN RIVER Blacks Fork Jct 8869 10.5 -M * 13.4 -M * Buck Pasture 9632 17.8 -M * 19.8 -M * EF Blacks Fork GS 9360 14.7 -M * 13.7 -M * Hams Fork 7840 16.5 9.6 172 17.8 9.4 189 Hewinta 9500 12.4 8.3 149 14.2 11.2 127 Hickerson Park 9122 8.3 6.2 134 8.5 7.9 108 Hole-in-Rock 9168 6.8 5.8 117 9.0 7.4 122 Indian Creek 9425 35.1 19.5 180 -M 18.4 * Kelley R.S. 8180 24.3 12.4 196 27.1 15.0 181 Spirit Lk 10235 13.6 -M * 14.5 -M * Steel Creek Park 10158 15.0 12.1 124 16.6 12.9 129 ----- ----- Basin Index (%) 160 146 UPPER BEAR RIVER Bear River RS 8777 12.8 -M * 15.1 -M * Bug Lake 7987 29.1 15.4 189 28.5 16.0 178 Burts Miller Ranch 8000 7.8 -M * 8.4 -M * Chalk Creek #1 9171 31.1 19.0 164 31.5 20.3 155 Hayden Fork 9130 22.4 12.5 179 26.0 17.0 153 Kelley R.S. 8180 24.3 12.4 196 27.1 15.0 181 Lily Lake 9133 13.9 10.7 130 16.7 13.8 121 Monte Cristo 8932 32.5 22.1 147 30.3 21.2 143 Salt River Summit 7760 19.5 10.9 179 25.2 13.9 181 ----- ----- Basin Index (%) 168 158 ----------------------------------------------------------------------------- -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.