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 13 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 26.7 13.9 192 36.9 18.4 201 Black Bear 8170 42.5 31.8 134 48.6 33.3 146 Blind Bull Sum 8650 40.1 19.7 204 -M 17.0 * Cottonwood Creek 7670 26.8 18.6 144 34.2 21.0 163 East Rim Divide 7930 18.7 9.5 197 19.8 10.2 194 Grand Targhee 9260 39.9 32.3 124 34.8 25.8 135 Granite Creek 6770 30.0 14.8 203 34.3 17.6 195 Grassy Lake 7265 35.5 28.0 127 49.5 31.5 157 Gros Ventre Summit 8750 -M 11.0 * -M 11.0 * Gunsight Pass 9820 19.5 11.7 167 22.0 11.7 188 Lewis Lake Divide 7850 38.2 26.8 143 49.8 31.0 161 Phillips Bench 8200 34.6 21.5 161 43.8 24.4 180 Salt River Summit 7760 20.4 11.4 179 -M 14.4 * Snake River Station 6920 21.8 15.2 143 32.5 19.8 164 Spring Creek Divide 9000 36.4 19.8 184 -M 20.6 * Thumb Divide 7980 21.8 13.4 163 22.9 15.9 144 Togwotee Pass 9580 30.3 19.7 154 34.3 20.9 164 Two Ocean Plateau 9240 -M 23.3 * -M 23.5 * Willow Creek 8380 29.8 24.3 123 44.8 28.8 156 Younts Peak 8350 26.6 12.5 213 28.7 13.6 211 ----- ----- Basin Index (%) 156 166 MADISON-GALLATIN Black Bear 8170 42.5 31.8 134 48.6 33.3 146 Canyon 7870 17.0 11.5 148 23.4 14.1 166 Madison Plateau 7750 25.1 19.5 129 32.5 23.0 141 West Yellowstone 6700 12.3 9.8 126 20.9 12.4 169 Whiskey Creek 6800 14.9 13.4 111 24.1 17.5 138 ----- ----- Basin Index (%) 130 149 YELLOWSTONE Beartooth Lake 9360 29.1 18.5 157 24.6 17.0 145 Burnt Mtn 5880 6.0 4.3 140 12.0 10.3 117 Canyon 7870 17.0 11.5 148 23.4 14.1 166 Cole Creek 7850 9.5 11.3 84 6.6 10.1 65 Evening Star 9200 34.6 21.2 163 34.9 23.5 149 Fisher Creek 9100 38.4 27.3 141 41.7 27.5 152 Northeast Entrance 7350 11.9 8.7 137 17.9 10.6 169 Parker Peak 9400 29.8 16.9 176 23.9 15.1 158 Sylvan Lake 8420 22.4 17.2 130 33.6 19.2 175 Thumb Divide 7980 21.8 13.4 163 22.9 15.9 144 Two Ocean Plateau 9240 -M 23.3 * -M 23.5 * White Mill 8700 30.7 19.3 159 31.6 20.4 155 Wolverine 7650 14.6 8.9 164 19.2 10.6 181 ----- ----- Basin Index (%) 149 150 WIND RIVER Burroughs Creek 8750 23.7 -M * 25.1 -M * Castle Creek 8400 12.1 -M * 14.1 -M * Cold Springs 9630 12.5 6.0 208 14.8 8.1 183 Deer Park 9700 28.3 12.3 230 32.1 16.4 196 Hobbs Park 10100 22.2 11.1 200 20.3 10.5 193 Kirwin 9550 18.0 8.0 225 20.8 9.5 219 Little Warm 9370 15.5 8.8 176 21.1 10.6 199 Owl Creek 8975 7.0 4.4 159 8.6 4.7 183 South Pass 9040 26.3 12.7 207 23.6 14.7 161 St. Lawrence Alt 8620 6.9 5.9 117 11.9 7.1 168 Togwotee Pass 9580 30.3 19.7 154 34.3 20.9 164 Townsend Creek 8700 12.4 7.5 165 15.8 9.5 166 ----- ----- Basin Index (%) 186 182 BIGHORN BASIN Bald Mtn. 9380 16.7 16.0 104 14.3 14.1 101 Bear Trap Meadow 8200 5.1 4.7 109 6.0 6.7 90 Bone Springs Div 9350 15.2 13.4 113 14.4 12.7 113 Grave Springs 8550 5.9 7.6 78 6.1 8.5 72 Kirwin 9550 18.0 8.0 225 20.8 9.5 219 Marquette 8760 7.6 -M * 11.7 -M * Middle Powder 7760 6.6 9.0 73 6.1 9.5 64 Owl Creek 8975 7.0 4.4 159 8.6 4.7 183 Powder River Pass 9480 7.1 8.6 83 10.0 10.3 97 Shell Creek 9580 14.2 12.3 115 11.2 11.3 99 Timber Creek 7950 5.4 4.1 132 6.9 5.7 121 ----- ----- Basin Index (%) 115 112 SHOSHONE RIVER Blackwater 9780 34.5 19.4 178 37.6 17.4 216 Evening Star 9200 34.6 21.2 163 34.9 23.5 149 Marquette 8760 7.6 -M * 11.7 -M * Sylvan Road 7120 15.3 10.1 151 28.0 14.7 190 Younts Peak 8350 26.6 12.5 213 28.7 13.6 211 ----- ----- Basin Index (%) 176 187 POWDER RIVER Bear Trap Meadow 8200 5.1 4.7 109 6.0 6.7 90 Cloud Peak Reservoir 9860 11.5 12.0 96 12.6 10.5 120 Grave Springs 8550 5.9 7.6 78 6.1 8.5 72 Hansen Sawmill 8360 7.2 5.2 138 9.1 6.6 138 Middle Powder 7760 6.6 9.0 73 6.1 9.5 64 Powder River Pass 9480 7.1 8.6 83 10.0 10.3 97 Soldier Park 8720 11.3 -M * 9.0 -M * ----- ----- Basin Index (%) 92 96 TONGUE RIVER Big Goose 7990 8.3 7.1 117 9.2 8.5 108 Bone Springs Div 9350 15.2 13.4 113 14.4 12.7 113 Burgess Junction 7880 8.2 9.3 88 8.8 9.8 90 Dome Lake 8880 12.2 9.5 128 11.8 10.8 109 Little Goose 8870 9.2 -M * 11.5 -M * Sucker Creek 8880 9.9 10.2 97 9.5 11.5 83 Tie Creek 6870 5.6 4.7 119 9.7 9.1 107 ----- ----- Basin Index (%) 110 102 BELLE FOURCHE Cole Canyon 5910 3.1 5.2 60 6.3 7.5 84 ----- ----- Basin Index (%) 60 84 CHEYENNE RIVER BASIN Blind Park 6890 4.7 6.9 68 7.6 10.1 75 North Rapid Creek 6130 5.2 6.4 81 6.1 8.2 74 ----- ----- Basin Index (%) 74 75 UPPER N. PLATTE Arapaho Ridge 10960 23.6 17.9 132 23.5 18.9 124 Blackhall Mtn 9820 34.5 -M * 33.9 -M * Columbine 9160 23.5 21.3 110 25.7 22.0 117 Divide Peak 8880 18.8 17.1 110 20.9 18.2 115 Joe Wright 10120 17.8 18.6 96 25.7 21.8 118 Laprele Creek 8375 11.3 8.7 130 10.4 10.2 102 Med Bow 10500 36.4 -M * 31.4 -M * North French Creek 10130 24.2 23.5 103 24.9 22.8 109 Never Summer 10280 21.2 17.2 123 17.2 -M * Old Battle 10000 35.3 25.9 136 36.1 30.1 120 Rawah 9020 11.8 9.3 127 14.9 11.6 128 Sage Creek Basin 7850 14.6 11.8 124 15.2 12.5 122 Sand Lake 10050 27.9 23.0 121 25.4 20.6 123 South Brush Creek 8440 10.8 11.2 96 11.2 12.7 88 Tower 10500 39.2 38.6 102 41.4 34.2 121 Webber Springs 9250 28.1 20.3 138 31.5 22.9 138 Willow Creek Pass 9540 16.2 10.4 156 17.1 11.2 153 Zirkel 9340 39.8 25.3 157 40.0 24.7 162 ----- ----- Basin Index (%) 121 124 SWEETWATER Deer Park 9700 28.3 12.3 230 32.1 16.4 196 Larsen Creek 9000 19.6 10.5 187 20.9 -M * South Pass 9040 26.3 12.7 207 23.6 14.7 161 ----- ----- Basin Index (%) 209 179 LOWER N. PLATTE Casper Mtn. 7900 11.1 11.6 96 10.2 12.1 84 Laprele Creek 8375 11.3 8.7 130 10.4 10.2 102 Reno Hill 8400 11.0 11.4 96 11.4 12.2 93 Windy Peak 7900 9.9 6.7 148 9.9 8.6 115 ----- ----- Basin Index (%) 113 97 LARAMIE RIVER Brooklyn Lake 10240 23.9 17.1 140 21.4 17.6 122 Cinnabar Park 9574 18.4 17.8 103 20.9 20.7 101 Crow Creek 8330 5.3 7.1 75 8.2 8.5 96 Deadman Hill 10220 19.0 13.2 144 18.3 14.2 129 Rawah 9020 11.8 9.3 127 14.9 11.6 128 Roach 9700 15.4 13.5 114 18.3 16.1 114 ----- ----- Basin Index (%) 120 115 S. PLATTE Black Mountain 8920 9.3 -M * 10.5 -M * Crow Creek 8330 5.3 7.1 75 8.2 8.5 96 Deadman Hill 10220 19.0 13.2 144 18.3 14.2 129 ----- ----- Basin Index (%) 120 117 LITTLE SNAKE RIVER Battle Mountain 7440 10.1 10.7 94 15.6 13.1 119 Divide Peak 8880 18.8 17.1 110 20.9 18.2 115 Elk River 8700 20.2 17.0 119 19.1 17.2 111 Little Snake River 8915 31.3 20.4 153 36.6 26.0 141 Old Battle 10000 35.3 25.9 136 36.1 30.1 120 Sage Creek Basin 7850 14.6 11.8 124 15.2 12.5 122 Sandstone RS 8150 12.7 11.7 109 15.2 16.1 94 Whiskey Park 8950 26.8 23.6 114 28.3 24.1 117 ----- ----- Basin Index (%) 123 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.7 10.9 181 21.7 11.3 192 Blind Bull Sum 8650 40.1 19.7 204 -M 17.0 * East Rim Divide 7930 18.7 9.5 197 19.8 10.2 194 Elkhart Park G.S. 9400 17.7 10.2 174 22.0 11.3 195 Gros Ventre Summit 8750 -M 11.0 * -M 11.0 * Gunsight Pass 9820 19.5 11.7 167 22.0 11.7 188 Kendall R.S. 7740 23.3 10.7 218 27.4 12.5 219 Loomis Park 8240 27.0 12.8 211 30.3 15.0 202 New Fork Lake 8340 16.4 9.1 180 16.3 9.4 173 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.8 10.7 185 25.4 12.3 207 Spring Creek Divide 9000 36.4 19.8 184 -M 20.6 * Triple Peak 8500 35.2 18.8 187 37.5 21.8 172 ----- ----- Basin Index (%) 190 193 LOWER GREEN RIVER Blacks Fork Jct 8869 10.7 -M * 13.6 -M * Buck Pasture 9632 18.7 -M * 20.7 -M * EF Blacks Fork GS 9360 15.3 -M * 14.2 -M * Hams Fork 7840 17.4 10.0 174 18.2 9.7 188 Hewinta 9500 11.9 8.8 135 14.1 11.7 121 Hickerson Park 9122 8.0 6.5 123 8.4 8.3 101 Hole-in-Rock 9168 6.5 6.2 105 9.1 7.7 118 Indian Creek 9425 36.7 20.5 179 -M 19.1 * Kelley R.S. 8180 24.2 12.8 189 28.3 15.5 183 Spirit Lk 10235 13.8 -M * 14.7 -M * Steel Creek Park 10158 15.3 12.8 120 17.1 13.5 127 ----- ----- Basin Index (%) 155 143 UPPER BEAR RIVER Bear River RS 8777 12.8 -M * 15.4 -M * Bug Lake 7987 30.4 16.3 187 30.0 16.6 181 Burts Miller Ranch 8000 7.0 -M * 8.5 -M * Chalk Creek #1 9171 31.5 20.3 155 32.0 21.1 152 Hayden Fork 9130 22.9 13.8 166 26.7 17.7 151 Kelley R.S. 8180 24.2 12.8 189 28.3 15.5 183 Lily Lake 9133 14.5 11.2 129 17.0 14.3 119 Monte Cristo 8932 33.5 23.2 144 32.4 22.1 147 Salt River Summit 7760 20.4 11.4 179 -M 14.4 * ----- ----- Basin Index (%) 163 155 ----------------------------------------------------------------------------- -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.