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 TUESDAY: MARCH 7 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 25.2 13.7 184 31.9 17.9 178 Black Bear 8170 39.0 30.7 127 45.1 32.3 140 Blind Bull Sum 8650 37.6 18.9 199 -M 16.5 * Cottonwood Creek 7670 25.8 18.1 143 32.5 20.3 160 East Rim Divide 7930 17.8 9.0 198 19.1 10.0 191 Grand Targhee 9260 37.8 31.2 121 33.0 25.3 130 Granite Creek 6770 28.5 14.3 199 -M 17.2 * Grassy Lake 7265 33.7 27.1 124 46.7 30.6 153 Gros Ventre Summit 8750 -M 10.6 * -M 10.6 * Gunsight Pass 9820 18.6 11.2 166 21.3 11.3 188 Lewis Lake Divide 7850 34.1 25.8 132 42.4 30.1 141 Phillips Bench 8200 31.8 20.6 154 39.3 23.7 166 Salt River Summit 7760 19.6 10.9 180 25.1 14.0 179 Snake River Station 6920 20.8 14.8 141 30.6 19.4 158 Spring Creek Divide 9000 34.4 19.4 177 -M 20.0 * Thumb Divide 7980 20.5 12.7 161 21.6 15.4 140 Togwotee Pass 9580 28.4 19.0 149 32.5 20.2 161 Two Ocean Plateau 9240 -M 22.3 * -M 22.7 * Willow Creek 8380 28.9 23.6 122 42.3 27.8 152 Younts Peak 8350 23.3 12.1 193 25.6 13.1 195 ----- ----- Basin Index (%) 152 157 MADISON-GALLATIN Black Bear 8170 39.0 30.7 127 45.1 32.3 140 Canyon 7870 16.0 11.2 143 22.1 13.6 162 Madison Plateau 7750 23.7 18.6 127 31.4 22.2 141 West Yellowstone 6700 12.1 9.3 130 20.3 12.1 168 Whiskey Creek 6800 14.4 12.6 114 22.9 17.0 135 ----- ----- Basin Index (%) 128 146 YELLOWSTONE Beartooth Lake 9360 26.3 17.8 148 21.7 16.4 132 Burnt Mtn 5880 5.8 4.3 135 11.5 9.8 117 Canyon 7870 16.0 11.2 143 22.1 13.6 162 Cole Creek 7850 8.9 10.8 82 6.5 9.5 68 Evening Star 9200 31.3 20.3 154 34.1 22.9 149 Fisher Creek 9100 34.0 26.5 128 38.2 26.5 144 Northeast Entrance 7350 10.8 8.6 126 16.4 10.3 159 Parker Peak 9400 27.3 16.4 166 23.3 14.6 160 Sylvan Lake 8420 21.4 16.6 129 32.4 18.6 174 Thumb Divide 7980 20.5 12.7 161 21.6 15.4 140 Two Ocean Plateau 9240 -M 22.3 * -M 22.7 * White Mill 8700 26.3 18.8 140 27.8 19.8 140 Wolverine 7650 13.5 8.9 152 18.0 10.3 175 ----- ----- Basin Index (%) 140 146 WIND RIVER Burroughs Creek 8750 21.0 -M * 22.8 -M * Castle Creek 8400 11.6 -M * 13.7 -M * Cold Springs 9630 11.9 5.7 209 14.1 7.8 181 Deer Park 9700 28.2 11.4 247 30.1 15.9 189 Hobbs Park 10100 21.7 10.6 205 19.7 10.1 195 Kirwin 9550 16.5 7.5 220 19.1 9.1 210 Little Warm 9370 14.5 8.4 173 20.0 10.3 194 Owl Creek 8975 6.8 4.2 162 8.5 4.5 189 South Pass 9040 25.8 12.2 211 23.2 14.2 163 St. Lawrence Alt 8620 7.1 5.7 125 11.9 6.8 175 Togwotee Pass 9580 28.4 19.0 149 32.5 20.2 161 Townsend Creek 8700 12.4 7.2 172 15.5 9.1 170 ----- ----- Basin Index (%) 189 180 BIGHORN BASIN Bald Mtn. 9380 16.0 15.6 103 13.6 13.6 100 Bear Trap Meadow 8200 4.7 4.6 102 5.8 6.4 91 Bone Springs Div 9350 14.3 13.0 110 13.4 12.3 109 Grave Springs 8550 5.6 7.2 78 6.0 8.2 73 Kirwin 9550 16.5 7.5 220 19.1 9.1 210 Marquette 8760 7.5 -M * 11.4 -M * Middle Powder 7760 6.6 8.5 78 5.8 9.1 64 Owl Creek 8975 6.8 4.2 162 8.5 4.5 189 Powder River Pass 9480 6.8 8.2 83 9.4 10.0 94 Shell Creek 9580 13.3 12.1 110 10.3 11.0 94 Timber Creek 7950 5.4 4.0 135 6.8 5.4 126 ----- ----- Basin Index (%) 113 110 SHOSHONE RIVER Blackwater 9780 31.5 18.4 171 34.4 16.7 206 Evening Star 9200 31.3 20.3 154 34.1 22.9 149 Marquette 8760 7.5 -M * 11.4 -M * Sylvan Road 7120 14.6 9.9 147 26.3 14.4 183 Younts Peak 8350 23.3 12.1 193 25.6 13.1 195 ----- ----- Basin Index (%) 166 179 POWDER RIVER Bear Trap Meadow 8200 4.7 4.6 102 5.8 6.4 91 Cloud Peak Reservoir 9860 10.5 11.2 94 11.6 10.0 116 Grave Springs 8550 5.6 7.2 78 6.0 8.2 73 Hansen Sawmill 8360 6.8 4.9 139 8.6 6.4 134 Middle Powder 7760 6.6 8.5 78 5.8 9.1 64 Powder River Pass 9480 6.8 8.2 83 9.4 10.0 94 Soldier Park 8720 10.0 -M * 8.6 -M * ----- ----- Basin Index (%) 92 94 TONGUE RIVER Big Goose 7990 7.7 6.5 118 8.6 8.2 105 Bone Springs Div 9350 14.3 13.0 110 13.4 12.3 109 Burgess Junction 7880 7.9 8.9 89 8.4 9.5 88 Dome Lake 8880 10.3 9.1 113 11.2 10.4 108 Little Goose 8870 8.4 -M * 10.8 -M * Sucker Creek 8880 9.3 9.7 96 8.8 11.1 79 Tie Creek 6870 5.3 4.6 115 9.3 8.8 106 ----- ----- Basin Index (%) 106 99 BELLE FOURCHE Cole Canyon 5910 2.9 4.9 59 5.7 7.3 78 ----- ----- Basin Index (%) 59 78 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.6 65 7.0 9.8 71 North Rapid Creek 6130 4.9 6.1 80 5.8 7.9 73 ----- ----- Basin Index (%) 72 72 UPPER N. PLATTE Arapaho Ridge 10960 23.0 17.3 133 23.1 18.3 126 Blackhall Mtn 9820 33.7 -M * 32.2 -M * Columbine 9160 23.6 20.7 114 24.7 21.1 117 Divide Peak 8880 18.4 16.6 111 20.4 17.5 117 Joe Wright 10120 17.6 17.8 99 25.3 20.9 121 Laprele Creek 8375 10.8 8.0 135 10.0 9.8 102 Med Bow 10500 34.7 -M * 30.6 -M * North French Creek 10130 23.0 21.8 106 23.9 21.8 110 Never Summer 10280 20.8 16.6 125 16.9 -M * Old Battle 10000 34.3 24.9 138 35.0 29.0 121 Rawah 9020 11.9 9.0 132 14.7 11.3 130 Sage Creek Basin 7850 15.2 11.0 138 15.1 12.1 125 Sand Lake 10050 26.5 21.8 122 24.2 19.8 122 South Brush Creek 8440 10.5 10.9 96 10.7 12.2 88 Tower 10500 38.4 37.6 102 40.8 33.1 123 Webber Springs 9250 27.2 19.6 139 30.7 22.0 140 Willow Creek Pass 9540 16.0 10.0 160 16.3 10.8 151 Zirkel 9340 38.8 24.5 158 38.7 23.8 163 ----- ----- Basin Index (%) 124 125 SWEETWATER Deer Park 9700 28.2 11.4 247 30.1 15.9 189 Larsen Creek 9000 18.5 10.0 185 20.3 -M * South Pass 9040 25.8 12.2 211 23.2 14.2 163 ----- ----- Basin Index (%) 216 177 LOWER N. PLATTE Casper Mtn. 7900 10.5 11.1 95 9.9 11.6 85 Laprele Creek 8375 10.8 8.0 135 10.0 9.8 102 Reno Hill 8400 10.7 10.9 98 10.8 11.7 92 Windy Peak 7900 9.6 6.2 155 9.7 8.2 118 ----- ----- Basin Index (%) 115 98 LARAMIE RIVER Brooklyn Lake 10240 22.3 16.1 139 19.9 16.9 118 Cinnabar Park 9574 17.5 17.6 99 20.0 20.1 100 Crow Creek 8330 4.8 7.0 69 7.5 8.2 91 Deadman Hill 10220 18.6 12.7 146 17.4 13.5 129 Rawah 9020 11.9 9.0 132 14.7 11.3 130 Roach 9700 15.2 12.9 118 18.0 15.5 116 ----- ----- Basin Index (%) 120 114 S. PLATTE Black Mountain 8920 9.2 -M * 10.4 -M * Crow Creek 8330 4.8 7.0 69 7.5 8.2 91 Deadman Hill 10220 18.6 12.7 146 17.4 13.5 129 ----- ----- Basin Index (%) 119 115 LITTLE SNAKE RIVER Battle Mountain 7440 11.0 10.2 108 15.0 12.6 119 Divide Peak 8880 18.4 16.6 111 20.4 17.5 117 Elk River 8700 19.9 16.5 121 18.9 16.6 114 Little Snake River 8915 30.5 20.1 152 34.3 25.5 135 Old Battle 10000 34.3 24.9 138 35.0 29.0 121 Sage Creek Basin 7850 15.2 11.0 138 15.1 12.1 125 Sandstone RS 8150 12.3 11.5 107 14.7 15.6 94 Whiskey Park 8950 25.7 22.6 114 27.0 23.2 116 ----- ----- Basin Index (%) 125 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.4 10.5 185 20.8 10.9 191 Blind Bull Sum 8650 37.6 18.9 199 -M 16.5 * East Rim Divide 7930 17.8 9.0 198 19.1 10.0 191 Elkhart Park G.S. 9400 16.4 9.8 167 20.7 10.9 190 Gros Ventre Summit 8750 -M 10.6 * -M 10.6 * Gunsight Pass 9820 18.6 11.2 166 21.3 11.3 188 Kendall R.S. 7740 21.7 10.3 211 24.5 12.2 201 Loomis Park 8240 25.2 12.4 203 27.8 14.6 190 New Fork Lake 8340 15.3 8.7 176 15.3 9.1 168 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.5 10.4 188 24.0 12.0 200 Spring Creek Divide 9000 34.4 19.4 177 -M 20.0 * Triple Peak 8500 33.7 18.0 187 35.5 21.1 168 ----- ----- Basin Index (%) 187 186 LOWER GREEN RIVER Blacks Fork Jct 8869 10.5 -M * 13.5 -M * Buck Pasture 9632 18.4 -M * 19.8 -M * EF Blacks Fork GS 9360 14.7 -M * -M -M * Hams Fork 7840 16.7 9.8 170 17.8 9.5 187 Hewinta 9500 12.4 8.4 148 13.3 11.3 118 Hickerson Park 9122 8.3 6.2 134 8.2 8.0 102 Hole-in-Rock 9168 6.7 5.9 114 8.8 7.4 119 Indian Creek 9425 35.6 19.7 181 -M 18.6 * Kelley R.S. 8180 23.1 12.4 186 27.0 15.1 179 Spirit Lk 10235 13.5 -M * 14.6 -M * Steel Creek Park 10158 15.1 12.2 124 16.6 12.9 129 ----- ----- Basin Index (%) 158 143 UPPER BEAR RIVER Bear River RS 8777 13.1 -M * 15.4 -M * Bug Lake 7987 -M 15.6 * -M 16.1 * Burts Miller Ranch 8000 7.9 -M * 8.2 -M * Chalk Creek #1 9171 31.6 19.2 165 31.6 20.4 155 Hayden Fork 9130 22.9 12.6 182 -M 17.1 * Kelley R.S. 8180 23.1 12.4 186 27.0 15.1 179 Lily Lake 9133 14.2 10.7 133 17.0 13.8 123 Monte Cristo 8932 32.9 22.3 148 30.3 21.3 142 Salt River Summit 7760 19.6 10.9 180 25.1 14.0 179 ----- ----- Basin Index (%) 164 155 ----------------------------------------------------------------------------- -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.