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 WEDNESDAY: MARCH 15 , 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 14.2 188 36.9 18.6 198 Black Bear 8170 42.7 32.0 133 48.6 33.7 144 Blind Bull Sum 8650 40.3 20.0 202 -M 17.2 * Cottonwood Creek 7670 26.4 18.9 140 34.4 21.2 162 East Rim Divide 7930 18.9 9.5 199 19.8 10.3 192 Grand Targhee 9260 40.0 32.5 123 -M 26.5 * Granite Creek 6770 30.0 14.9 201 34.3 17.7 194 Grassy Lake 7265 35.8 28.5 126 49.4 31.8 155 Gros Ventre Summit 8750 -M 11.1 * -M 11.1 * Gunsight Pass 9820 19.6 11.7 168 22.1 11.9 186 Lewis Lake Divide 7850 38.3 27.2 141 49.8 31.3 159 Phillips Bench 8200 35.0 21.8 161 43.7 24.6 178 Salt River Summit 7760 20.5 11.6 177 -M 14.5 * Snake River Station 6920 21.6 15.2 142 32.5 19.9 163 Spring Creek Divide 9000 36.6 20.1 182 37.0 20.8 178 Thumb Divide 7980 22.0 13.6 162 25.1 16.0 157 Togwotee Pass 9580 30.5 20.0 152 34.7 21.1 164 Two Ocean Plateau 9240 -M 23.5 * -M 23.7 * Willow Creek 8380 29.7 24.7 120 45.0 29.1 155 Younts Peak 8350 26.7 12.8 209 28.8 13.7 210 ----- ----- Basin Index (%) 155 169 MADISON-GALLATIN Black Bear 8170 42.7 32.0 133 48.6 33.7 144 Canyon 7870 16.9 11.6 146 23.4 14.2 165 Madison Plateau 7750 25.2 19.8 127 32.6 23.1 141 West Yellowstone 6700 12.1 9.9 122 20.9 12.5 167 Whiskey Creek 6800 14.9 13.6 110 24.1 17.7 136 ----- ----- Basin Index (%) 129 148 YELLOWSTONE Beartooth Lake 9360 29.4 18.6 158 24.9 17.1 146 Burnt Mtn 5880 5.4 4.4 123 12.0 10.5 114 Canyon 7870 16.9 11.6 146 23.4 14.2 165 Cole Creek 7850 9.4 11.5 82 6.7 10.2 66 Evening Star 9200 35.0 21.6 162 40.2 23.7 170 Fisher Creek 9100 39.0 27.7 141 41.9 27.7 151 Northeast Entrance 7350 11.8 8.7 136 18.1 10.7 169 Parker Peak 9400 30.1 17.1 176 28.0 15.3 183 Sylvan Lake 8420 22.4 17.5 128 33.8 19.4 174 Thumb Divide 7980 22.0 13.6 162 25.1 16.0 157 Two Ocean Plateau 9240 -M 23.5 * -M 23.7 * White Mill 8700 31.0 19.4 160 31.9 20.6 155 Wolverine 7650 14.4 8.8 164 19.5 10.7 182 ----- ----- Basin Index (%) 148 156 WIND RIVER Burroughs Creek 8750 25.0 -M * 25.2 -M * Castle Creek 8400 12.3 -M * 14.4 -M * Cold Springs 9630 12.5 6.1 205 14.9 8.2 182 Deer Park 9700 28.0 12.3 228 32.2 16.6 194 Hobbs Park 10100 22.4 11.2 200 20.4 10.6 192 Kirwin 9550 18.1 8.1 223 20.9 9.6 218 Little Warm 9370 15.6 9.0 173 21.3 10.8 197 Owl Creek 8975 7.0 4.5 156 8.8 4.7 187 South Pass 9040 26.3 12.9 204 23.7 14.8 160 St. Lawrence Alt 8620 6.9 5.9 117 12.0 7.2 167 Togwotee Pass 9580 30.5 20.0 152 34.7 21.1 164 Townsend Creek 8700 12.3 7.6 162 15.9 9.6 166 ----- ----- Basin Index (%) 184 181 BIGHORN BASIN Bald Mtn. 9380 16.8 16.2 104 14.5 14.3 101 Bear Trap Meadow 8200 5.1 4.8 106 6.1 6.8 90 Bone Springs Div 9350 15.4 13.6 113 14.6 12.8 114 Grave Springs 8550 6.0 7.7 78 6.2 8.6 72 Kirwin 9550 18.1 8.1 223 20.9 9.6 218 Marquette 8760 7.4 -M * 11.8 -M * Middle Powder 7760 6.4 9.1 70 6.2 9.6 65 Owl Creek 8975 7.0 4.5 156 8.8 4.7 187 Powder River Pass 9480 7.0 8.8 80 10.2 10.4 98 Shell Creek 9580 14.3 12.5 114 11.4 11.4 100 Timber Creek 7950 5.4 4.2 129 6.9 5.8 119 ----- ----- Basin Index (%) 113 113 SHOSHONE RIVER Blackwater 9780 34.4 19.7 175 38.3 17.6 218 Evening Star 9200 35.0 21.6 162 40.2 23.7 170 Marquette 8760 7.4 -M * 11.8 -M * Sylvan Road 7120 15.2 10.2 149 28.1 14.8 190 Younts Peak 8350 26.7 12.8 209 28.8 13.7 210 ----- ----- Basin Index (%) 173 194 POWDER RIVER Bear Trap Meadow 8200 5.1 4.8 106 6.1 6.8 90 Cloud Peak Reservoir 9860 11.6 12.2 95 12.8 10.6 121 Grave Springs 8550 6.0 7.7 78 6.2 8.6 72 Hansen Sawmill 8360 7.3 5.3 138 9.2 6.8 135 Middle Powder 7760 6.4 9.1 70 6.2 9.6 65 Powder River Pass 9480 7.0 8.8 80 10.2 10.4 98 Soldier Park 8720 11.4 -M * 9.1 -M * ----- ----- Basin Index (%) 91 96 TONGUE RIVER Big Goose 7990 8.4 7.4 114 9.3 8.7 107 Bone Springs Div 9350 15.4 13.6 113 14.6 12.8 114 Burgess Junction 7880 8.3 9.4 88 9.0 10.0 90 Dome Lake 8880 12.3 9.7 127 12.0 10.9 110 Little Goose 8870 9.2 -M * 11.7 -M * Sucker Creek 8880 9.9 10.4 95 9.7 11.7 83 Tie Creek 6870 5.4 4.7 115 9.7 9.3 104 ----- ----- Basin Index (%) 108 101 BELLE FOURCHE Cole Canyon 5910 2.8 5.4 52 6.5 7.7 84 ----- ----- Basin Index (%) 52 84 CHEYENNE RIVER BASIN Blind Park 6890 4.8 7.1 68 7.8 10.2 76 North Rapid Creek 6130 5.0 6.4 78 6.4 8.3 77 ----- ----- Basin Index (%) 73 77 UPPER N. PLATTE Arapaho Ridge 10960 23.8 18.0 132 23.6 19.0 124 Blackhall Mtn 9820 34.6 -M * 34.4 -M * Columbine 9160 24.5 21.5 114 25.8 22.2 116 Divide Peak 8880 18.7 17.2 109 21.0 18.4 114 Joe Wright 10120 18.1 18.7 97 25.7 22.0 117 Laprele Creek 8375 11.2 8.8 127 10.4 10.4 100 Med Bow 10500 36.7 -M * 32.1 -M * North French Creek 10130 24.3 23.9 102 25.0 23.0 109 Never Summer 10280 21.3 17.3 123 17.3 -M * Old Battle 10000 35.3 26.0 136 36.2 30.5 119 Rawah 9020 11.9 9.2 129 15.1 11.6 130 Sage Creek Basin 7850 14.1 11.8 119 15.2 12.8 119 Sand Lake 10050 28.1 23.5 120 25.5 20.9 122 South Brush Creek 8440 10.5 11.2 94 11.4 12.9 88 Tower 10500 39.3 38.9 101 41.5 34.6 120 Webber Springs 9250 28.2 20.5 138 31.5 23.1 136 Willow Creek Pass 9540 16.4 10.5 156 17.1 11.3 151 Zirkel 9340 39.6 25.5 155 40.2 24.8 162 ----- ----- Basin Index (%) 121 123 SWEETWATER Deer Park 9700 28.0 12.3 228 32.2 16.6 194 Larsen Creek 9000 18.7 10.7 175 21.0 -M * South Pass 9040 26.3 12.9 204 23.7 14.8 160 ----- ----- Basin Index (%) 203 178 LOWER N. PLATTE Casper Mtn. 7900 10.9 11.8 92 10.4 12.3 85 Laprele Creek 8375 11.2 8.8 127 10.4 10.4 100 Reno Hill 8400 11.1 11.5 97 11.7 12.4 94 Windy Peak 7900 9.7 6.7 145 10.0 8.7 115 ----- ----- Basin Index (%) 111 97 LARAMIE RIVER Brooklyn Lake 10240 24.2 17.3 140 21.6 17.8 121 Cinnabar Park 9574 18.5 17.8 104 20.9 20.8 100 Crow Creek 8330 5.1 7.1 72 8.2 8.6 95 Deadman Hill 10220 19.1 13.4 143 18.2 14.3 127 Rawah 9020 11.9 9.2 129 15.1 11.6 130 Roach 9700 15.4 13.5 114 18.4 16.3 113 ----- ----- Basin Index (%) 120 115 S. PLATTE Black Mountain 8920 9.4 -M * 10.5 -M * Crow Creek 8330 5.1 7.1 72 8.2 8.6 95 Deadman Hill 10220 19.1 13.4 143 18.2 14.3 127 ----- ----- Basin Index (%) 118 115 LITTLE SNAKE RIVER Battle Mountain 7440 9.4 10.9 86 15.6 13.2 118 Divide Peak 8880 18.7 17.2 109 21.0 18.4 114 Elk River 8700 19.6 17.2 114 19.1 17.4 110 Little Snake River 8915 31.1 20.5 152 36.7 26.1 141 Old Battle 10000 35.3 26.0 136 36.2 30.5 119 Sage Creek Basin 7850 14.1 11.8 119 15.2 12.8 119 Sandstone RS 8150 12.4 11.6 107 15.3 16.3 94 Whiskey Park 8950 27.5 23.8 116 28.3 24.4 116 ----- ----- Basin Index (%) 121 118 UPPER GREEN RIVER Big Sandy Opening 9080 20.2 11.1 182 21.7 11.4 190 Blind Bull Sum 8650 40.3 20.0 202 -M 17.2 * East Rim Divide 7930 18.9 9.5 199 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 11.1 * -M 11.1 * Gunsight Pass 9820 19.6 11.7 168 22.1 11.9 186 Kendall R.S. 7740 23.4 10.9 215 27.5 12.6 218 Loomis Park 8240 27.3 13.0 210 30.4 15.1 201 New Fork Lake 8340 16.2 9.2 176 16.4 9.5 173 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.7 10.8 182 25.4 12.4 205 Spring Creek Divide 9000 36.6 20.1 182 37.0 20.8 178 Triple Peak 8500 35.2 19.0 185 37.5 22.0 170 ----- ----- Basin Index (%) 189 189 LOWER GREEN RIVER Blacks Fork Jct 8869 10.0 -M * 13.6 -M * Buck Pasture 9632 18.5 -M * 20.6 -M * EF Blacks Fork GS 9360 15.4 -M * -M -M * Hams Fork 7840 16.8 10.1 166 18.2 9.8 186 Hewinta 9500 10.7 9.1 118 14.1 11.9 118 Hickerson Park 9122 7.8 6.6 118 8.5 8.5 100 Hole-in-Rock 9168 6.2 6.3 98 9.1 7.9 115 Indian Creek 9425 36.7 20.7 177 -M 19.3 * Kelley R.S. 8180 24.9 12.9 193 28.4 15.7 181 Spirit Lk 10235 13.5 -M * 14.7 -M * Steel Creek Park 10158 15.5 13.0 119 17.1 13.8 124 ----- ----- Basin Index (%) 151 141 UPPER BEAR RIVER Bear River RS 8777 11.9 -M * 15.4 -M * Bug Lake 7987 30.2 16.4 184 30.0 16.9 178 Burts Miller Ranch 8000 6.6 -M * 8.4 -M * Chalk Creek #1 9171 31.4 20.5 153 -M 21.4 * Hayden Fork 9130 22.0 14.0 157 26.7 17.9 149 Kelley R.S. 8180 24.9 12.9 193 28.4 15.7 181 Lily Lake 9133 14.4 11.3 127 16.9 14.5 117 Monte Cristo 8932 33.8 23.5 144 34.7 22.4 155 Salt River Summit 7760 20.5 11.6 177 -M 14.5 * ----- ----- Basin Index (%) 161 156 ----------------------------------------------------------------------------- -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.