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 14 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 26.8 14.0 191 36.9 18.5 199 Black Bear 8170 42.6 31.9 134 48.6 33.5 145 Blind Bull Sum 8650 40.3 19.8 204 -M 17.1 * Cottonwood Creek 7670 26.8 18.7 143 34.4 21.1 163 East Rim Divide 7930 18.8 9.5 198 19.8 10.3 192 Grand Targhee 9260 39.9 32.4 123 -M 26.1 * Granite Creek 6770 30.1 14.8 203 34.2 17.7 193 Grassy Lake 7265 35.4 28.2 126 49.4 31.7 156 Gros Ventre Summit 8750 -M 11.0 * -M 11.0 * Gunsight Pass 9820 19.5 11.7 167 22.1 11.8 187 Lewis Lake Divide 7850 38.2 27.0 141 49.9 31.1 160 Phillips Bench 8200 34.7 21.6 161 43.8 24.5 179 Salt River Summit 7760 20.4 11.5 177 -M 14.4 * Snake River Station 6920 21.4 15.2 141 32.6 19.9 164 Spring Creek Divide 9000 36.5 19.9 183 36.9 20.7 178 Thumb Divide 7980 21.9 13.5 162 -M 16.0 * Togwotee Pass 9580 30.4 19.8 154 34.7 21.0 165 Two Ocean Plateau 9240 -M 23.4 * -M 23.6 * Willow Creek 8380 29.7 24.5 121 44.8 29.0 154 Younts Peak 8350 26.8 12.7 211 28.7 13.6 211 ----- ----- Basin Index (%) 156 170 MADISON-GALLATIN Black Bear 8170 42.6 31.9 134 48.6 33.5 145 Canyon 7870 16.9 11.6 146 23.4 14.2 165 Madison Plateau 7750 25.1 19.7 127 32.6 23.1 141 West Yellowstone 6700 12.3 9.9 124 20.9 12.5 167 Whiskey Creek 6800 14.9 13.5 110 24.1 17.6 137 ----- ----- Basin Index (%) 129 148 YELLOWSTONE Beartooth Lake 9360 29.2 18.6 157 24.7 17.1 144 Burnt Mtn 5880 5.8 4.4 132 12.0 10.4 115 Canyon 7870 16.9 11.6 146 23.4 14.2 165 Cole Creek 7850 9.4 11.4 82 6.7 10.2 66 Evening Star 9200 34.7 21.4 162 -M 23.6 * Fisher Creek 9100 38.5 27.5 140 41.7 27.6 151 Northeast Entrance 7350 11.9 8.7 137 18.0 10.6 170 Parker Peak 9400 29.9 17.0 176 -M 15.2 * Sylvan Lake 8420 22.3 17.3 129 33.6 19.3 174 Thumb Divide 7980 21.9 13.5 162 -M 16.0 * Two Ocean Plateau 9240 -M 23.4 * -M 23.6 * White Mill 8700 30.7 19.4 158 31.7 20.5 155 Wolverine 7650 14.4 8.9 162 19.4 10.6 183 ----- ----- Basin Index (%) 148 150 WIND RIVER Burroughs Creek 8750 23.7 -M * 25.2 -M * Castle Creek 8400 12.0 -M * 14.4 -M * Cold Springs 9630 12.4 6.1 203 14.9 8.2 182 Deer Park 9700 28.1 12.3 228 32.2 16.6 194 Hobbs Park 10100 22.3 11.1 201 20.4 10.6 192 Kirwin 9550 18.1 8.0 226 20.8 9.6 217 Little Warm 9370 15.6 8.9 175 21.2 10.7 198 Owl Creek 8975 7.0 4.4 159 8.8 4.7 187 South Pass 9040 26.3 12.8 205 23.7 14.7 161 St. Lawrence Alt 8620 6.9 5.9 117 12.0 7.2 167 Togwotee Pass 9580 30.4 19.8 154 34.7 21.0 165 Townsend Creek 8700 12.4 7.6 163 15.8 9.5 166 ----- ----- Basin Index (%) 185 181 BIGHORN BASIN Bald Mtn. 9380 16.8 16.1 104 14.5 14.2 102 Bear Trap Meadow 8200 5.1 4.8 106 6.1 6.7 91 Bone Springs Div 9350 15.3 13.5 113 14.6 12.8 114 Grave Springs 8550 6.0 7.7 78 6.2 8.5 73 Kirwin 9550 18.1 8.0 226 20.8 9.6 217 Marquette 8760 7.6 -M * 11.8 -M * Middle Powder 7760 6.6 9.0 73 6.2 9.5 65 Owl Creek 8975 7.0 4.4 159 8.8 4.7 187 Powder River Pass 9480 7.0 8.7 80 10.1 10.4 97 Shell Creek 9580 14.3 12.4 115 11.4 11.3 101 Timber Creek 7950 5.4 4.1 132 6.9 5.8 119 ----- ----- Basin Index (%) 115 113 SHOSHONE RIVER Blackwater 9780 34.4 19.5 176 37.7 17.5 215 Evening Star 9200 34.7 21.4 162 -M 23.6 * Marquette 8760 7.6 -M * 11.8 -M * Sylvan Road 7120 15.2 10.1 150 27.9 14.7 190 Younts Peak 8350 26.8 12.7 211 28.7 13.6 211 ----- ----- Basin Index (%) 174 206 POWDER RIVER Bear Trap Meadow 8200 5.1 4.8 106 6.1 6.7 91 Cloud Peak Reservoir 9860 11.5 12.1 95 12.7 10.6 120 Grave Springs 8550 6.0 7.7 78 6.2 8.5 73 Hansen Sawmill 8360 7.3 5.3 138 9.2 6.7 137 Middle Powder 7760 6.6 9.0 73 6.2 9.5 65 Powder River Pass 9480 7.0 8.7 80 10.1 10.4 97 Soldier Park 8720 11.4 -M * 9.1 -M * ----- ----- Basin Index (%) 91 96 TONGUE RIVER Big Goose 7990 8.4 7.3 115 9.3 8.6 108 Bone Springs Div 9350 15.3 13.5 113 14.6 12.8 114 Burgess Junction 7880 8.3 9.4 88 9.0 9.9 91 Dome Lake 8880 12.3 9.6 128 11.9 10.8 110 Little Goose 8870 9.2 -M * 11.7 -M * Sucker Creek 8880 9.9 10.3 96 9.6 11.6 83 Tie Creek 6870 5.7 4.7 121 9.7 9.2 105 ----- ----- Basin Index (%) 109 102 BELLE FOURCHE Cole Canyon 5910 2.7 5.3 51 6.4 7.6 84 ----- ----- Basin Index (%) 51 84 CHEYENNE RIVER BASIN Blind Park 6890 4.8 7.0 69 7.7 10.2 75 North Rapid Creek 6130 5.2 6.4 81 6.3 8.2 77 ----- ----- Basin Index (%) 75 76 UPPER N. PLATTE Arapaho Ridge 10960 23.5 17.9 131 23.6 18.9 125 Blackhall Mtn 9820 34.7 -M * 34.0 -M * Columbine 9160 23.7 21.4 111 25.8 22.1 117 Divide Peak 8880 18.7 17.2 109 20.9 18.3 114 Joe Wright 10120 17.8 18.7 95 25.7 21.8 118 Laprele Creek 8375 11.2 8.8 127 10.4 10.3 101 Med Bow 10500 36.6 -M * 31.8 -M * North French Creek 10130 24.1 23.7 102 24.9 22.8 109 Never Summer 10280 21.2 17.3 123 17.3 -M * Old Battle 10000 35.3 26.0 136 36.1 30.3 119 Rawah 9020 11.6 9.2 126 15.1 11.6 130 Sage Creek Basin 7850 14.5 11.8 123 15.2 12.6 121 Sand Lake 10050 28.0 23.2 121 25.5 20.7 123 South Brush Creek 8440 10.7 11.2 96 11.3 12.8 88 Tower 10500 39.3 38.7 102 41.5 34.4 121 Webber Springs 9250 28.1 20.4 138 31.6 23.0 137 Willow Creek Pass 9540 16.2 10.4 156 17.1 11.2 153 Zirkel 9340 39.8 25.4 157 40.2 24.8 162 ----- ----- Basin Index (%) 121 123 SWEETWATER Deer Park 9700 28.1 12.3 228 32.2 16.6 194 Larsen Creek 9000 19.3 10.6 182 21.0 -M * South Pass 9040 26.3 12.8 205 23.7 14.7 161 ----- ----- Basin Index (%) 206 179 LOWER N. PLATTE Casper Mtn. 7900 11.1 11.7 95 10.3 12.2 84 Laprele Creek 8375 11.2 8.8 127 10.4 10.3 101 Reno Hill 8400 11.1 11.4 97 11.6 12.3 94 Windy Peak 7900 9.8 6.7 146 10.0 8.7 115 ----- ----- Basin Index (%) 112 97 LARAMIE RIVER Brooklyn Lake 10240 24.0 17.2 140 21.5 17.7 121 Cinnabar Park 9574 18.4 17.8 103 20.9 20.8 100 Crow Creek 8330 5.3 7.1 75 8.2 8.5 96 Deadman Hill 10220 19.2 13.3 144 18.2 14.3 127 Rawah 9020 11.6 9.2 126 15.1 11.6 130 Roach 9700 15.4 13.5 114 18.4 16.2 114 ----- ----- Basin Index (%) 120 115 S. PLATTE Black Mountain 8920 9.4 -M * 10.5 -M * Crow Creek 8330 5.3 7.1 75 8.2 8.5 96 Deadman Hill 10220 19.2 13.3 144 18.2 14.3 127 ----- ----- Basin Index (%) 120 116 LITTLE SNAKE RIVER Battle Mountain 7440 9.8 10.8 91 15.7 13.1 120 Divide Peak 8880 18.7 17.2 109 20.9 18.3 114 Elk River 8700 19.6 17.1 115 19.1 17.3 110 Little Snake River 8915 31.2 20.5 152 36.7 26.1 141 Old Battle 10000 35.3 26.0 136 36.1 30.3 119 Sage Creek Basin 7850 14.5 11.8 123 15.2 12.6 121 Sandstone RS 8150 12.5 11.6 108 15.3 16.2 94 Whiskey Park 8950 26.8 23.7 113 28.4 24.2 117 ----- ----- Basin Index (%) 121 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.8 11.0 180 21.7 11.4 190 Blind Bull Sum 8650 40.3 19.8 204 -M 17.1 * East Rim Divide 7930 18.8 9.5 198 19.8 10.3 192 Elkhart Park G.S. 9400 17.9 10.3 174 22.1 11.4 194 Gros Ventre Summit 8750 -M 11.0 * -M 11.0 * Gunsight Pass 9820 19.5 11.7 167 22.1 11.8 187 Kendall R.S. 7740 23.3 10.8 216 27.5 12.6 218 Loomis Park 8240 27.0 12.9 209 30.4 15.1 201 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 25.5 12.4 206 Spring Creek Divide 9000 36.5 19.9 183 36.9 20.7 178 Triple Peak 8500 35.1 18.9 186 37.4 21.9 171 ----- ----- Basin Index (%) 190 190 LOWER GREEN RIVER Blacks Fork Jct 8869 10.1 -M * 13.6 -M * Buck Pasture 9632 18.7 -M * 20.7 -M * EF Blacks Fork GS 9360 15.4 -M * -M -M * Hams Fork 7840 17.1 10.0 171 18.3 9.7 189 Hewinta 9500 11.1 8.9 125 14.2 11.8 120 Hickerson Park 9122 7.9 6.6 120 8.5 8.4 101 Hole-in-Rock 9168 6.4 6.2 103 9.2 7.8 118 Indian Creek 9425 36.8 20.6 179 -M 19.3 * Kelley R.S. 8180 24.2 12.9 188 28.4 15.6 182 Spirit Lk 10235 13.7 -M * 14.7 -M * Steel Creek Park 10158 15.4 12.9 119 17.1 13.7 125 ----- ----- Basin Index (%) 152 143 UPPER BEAR RIVER Bear River RS 8777 12.3 -M * 15.4 -M * Bug Lake 7987 30.3 16.4 185 30.0 16.8 179 Burts Miller Ranch 8000 6.8 -M * 8.3 -M * Chalk Creek #1 9171 31.6 20.4 155 37.7 21.3 177 Hayden Fork 9130 22.4 13.9 161 26.7 17.8 150 Kelley R.S. 8180 24.2 12.9 188 28.4 15.6 182 Lily Lake 9133 14.4 11.3 127 17.0 14.5 117 Monte Cristo 8932 33.6 23.3 144 34.7 22.3 156 Salt River Summit 7760 20.4 11.5 177 -M 14.4 * ----- ----- Basin Index (%) 161 161 ----------------------------------------------------------------------------- -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.