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 THURSDAY: MARCH 9 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 26.4 13.8 191 -M 18.1 * Black Bear 8170 41.3 31.2 132 46.3 32.8 141 Blind Bull Sum 8650 39.1 19.1 205 -M 16.8 * Cottonwood Creek 7670 26.6 18.3 145 33.5 20.6 163 East Rim Divide 7930 18.3 9.3 197 19.5 10.1 193 Grand Targhee 9260 38.8 31.5 123 -M 25.4 * Granite Creek 6770 29.1 14.5 201 -M 17.4 * Grassy Lake 7265 35.0 27.3 128 48.3 31.0 156 Gros Ventre Summit 8750 17.8 10.7 166 21.3 10.8 197 Gunsight Pass 9820 18.9 11.5 164 21.6 11.5 188 Lewis Lake Divide 7850 35.9 26.1 138 -M 30.5 * Phillips Bench 8200 33.4 20.9 160 39.4 24.0 164 Salt River Summit 7760 20.2 11.0 184 25.4 14.1 180 Snake River Station 6920 21.7 15.0 145 -M 19.5 * Spring Creek Divide 9000 35.6 19.5 183 -M 20.3 * Thumb Divide 7980 21.2 13.0 163 -M 15.6 * Togwotee Pass 9580 29.3 19.3 152 33.3 20.5 162 Two Ocean Plateau 9240 -M 22.7 * -M 23.1 * Willow Creek 8380 29.5 24.0 123 43.9 28.1 156 Younts Peak 8350 25.0 12.2 205 27.0 13.3 203 ----- ----- Basin Index (%) 156 166 MADISON-GALLATIN Black Bear 8170 41.3 31.2 132 46.3 32.8 141 Canyon 7870 16.2 11.4 142 22.4 13.9 161 Madison Plateau 7750 24.6 19.0 129 32.1 22.6 142 West Yellowstone 6700 12.4 9.5 131 20.6 12.3 167 Whiskey Creek 6800 15.0 13.0 115 23.6 17.2 137 ----- ----- Basin Index (%) 130 147 YELLOWSTONE Beartooth Lake 9360 27.3 18.1 151 22.7 16.7 136 Burnt Mtn 5880 5.4 4.4 123 11.5 10.0 115 Canyon 7870 16.2 11.4 142 22.4 13.9 161 Cole Creek 7850 9.0 11.0 82 6.5 9.8 66 Evening Star 9200 32.6 20.6 158 -M 23.2 * Fisher Creek 9100 36.2 26.7 136 39.7 26.9 148 Northeast Entrance 7350 11.4 8.6 133 16.9 10.4 162 Parker Peak 9400 28.6 16.5 173 23.5 14.8 159 Sylvan Lake 8420 21.8 16.8 130 33.0 18.9 175 Thumb Divide 7980 21.2 13.0 163 -M 15.6 * Two Ocean Plateau 9240 -M 22.7 * -M 23.1 * White Mill 8700 -M 19.0 * 29.6 20.1 147 Wolverine 7650 13.1 9.0 146 18.5 10.4 178 ----- ----- Basin Index (%) 143 148 WIND RIVER Burroughs Creek 8750 21.4 -M * 23.5 -M * Castle Creek 8400 11.8 -M * 14.0 -M * Cold Springs 9630 12.3 5.8 212 14.6 7.9 185 Deer Park 9700 28.3 11.8 240 30.6 16.1 190 Hobbs Park 10100 22.2 10.8 206 20.2 10.2 198 Kirwin 9550 17.3 7.6 228 19.8 9.3 213 Little Warm 9370 14.9 8.6 173 20.4 10.4 196 Owl Creek 8975 7.0 4.3 163 8.7 4.5 193 South Pass 9040 26.2 12.4 211 23.4 14.4 162 St. Lawrence Alt 8620 7.2 5.8 124 12.0 6.9 174 Togwotee Pass 9580 29.3 19.3 152 33.3 20.5 162 Townsend Creek 8700 12.6 7.3 173 15.7 9.2 171 ----- ----- Basin Index (%) 189 182 BIGHORN BASIN Bald Mtn. 9380 16.2 15.9 102 14.0 13.8 101 Bear Trap Meadow 8200 5.0 4.6 109 6.0 6.5 92 Bone Springs Div 9350 14.5 13.2 110 13.9 12.4 112 Grave Springs 8550 5.8 7.3 79 6.2 8.2 76 Kirwin 9550 17.3 7.6 228 19.8 9.3 213 Marquette 8760 7.7 -M * 11.8 -M * Middle Powder 7760 6.6 8.7 76 6.1 9.2 66 Owl Creek 8975 7.0 4.3 163 8.7 4.5 193 Powder River Pass 9480 6.8 8.3 82 9.8 10.1 97 Shell Creek 9580 13.6 12.2 111 10.7 11.1 96 Timber Creek 7950 5.4 4.0 135 6.9 5.5 125 ----- ----- Basin Index (%) 114 113 SHOSHONE RIVER Blackwater 9780 32.6 18.8 173 34.8 17.0 205 Evening Star 9200 32.6 20.6 158 -M 23.2 * Marquette 8760 7.7 -M * 11.8 -M * Sylvan Road 7120 15.2 10.0 152 26.8 14.6 184 Younts Peak 8350 25.0 12.2 205 27.0 13.3 203 ----- ----- Basin Index (%) 171 197 POWDER RIVER Bear Trap Meadow 8200 5.0 4.6 109 6.0 6.5 92 Cloud Peak Reservoir 9860 10.9 11.5 95 12.2 10.2 120 Grave Springs 8550 5.8 7.3 79 6.2 8.2 76 Hansen Sawmill 8360 7.1 5.1 139 9.0 6.5 138 Middle Powder 7760 6.6 8.7 76 6.1 9.2 66 Powder River Pass 9480 6.8 8.3 82 9.8 10.1 97 Soldier Park 8720 10.8 -M * 8.7 -M * ----- ----- Basin Index (%) 93 97 TONGUE RIVER Big Goose 7990 8.0 6.7 119 8.9 8.3 107 Bone Springs Div 9350 14.5 13.2 110 13.9 12.4 112 Burgess Junction 7880 8.0 9.1 88 8.7 9.6 91 Dome Lake 8880 11.6 9.3 125 11.4 10.5 109 Little Goose 8870 8.6 -M * 11.1 -M * Sucker Creek 8880 9.5 9.9 96 9.3 11.2 83 Tie Creek 6870 5.4 4.7 115 9.5 8.9 107 ----- ----- Basin Index (%) 108 101 BELLE FOURCHE Cole Canyon 5910 3.2 5.0 64 5.8 7.3 79 ----- ----- Basin Index (%) 64 79 CHEYENNE RIVER BASIN Blind Park 6890 3.9 6.7 58 7.0 9.9 71 North Rapid Creek 6130 4.6 6.2 74 5.9 8.0 74 ----- ----- Basin Index (%) 66 72 UPPER N. PLATTE Arapaho Ridge 10960 23.3 17.5 133 23.4 18.5 126 Blackhall Mtn 9820 34.3 -M * 32.7 -M * Columbine 9160 23.7 20.9 113 25.7 21.4 120 Divide Peak 8880 18.6 16.8 111 20.7 17.8 116 Joe Wright 10120 17.8 18.2 98 25.6 21.2 121 Laprele Creek 8375 11.0 8.3 133 10.2 9.9 103 Med Bow 10500 35.2 -M * 30.8 -M * North French Creek 10130 23.1 22.5 103 24.0 22.2 108 Never Summer 10280 21.1 16.8 126 17.1 -M * Old Battle 10000 34.8 25.3 138 35.5 29.4 121 Rawah 9020 12.1 9.2 132 14.9 11.4 131 Sage Creek Basin 7850 15.5 11.3 137 15.2 12.3 124 Sand Lake 10050 27.1 22.3 122 24.9 20.1 124 South Brush Creek 8440 10.6 11.1 95 11.0 12.4 89 Tower 10500 39.0 37.9 103 41.3 33.6 123 Webber Springs 9250 28.0 20.0 140 31.3 22.3 140 Willow Creek Pass 9540 16.2 10.2 159 17.1 10.9 157 Zirkel 9340 39.2 25.0 157 38.9 24.1 161 ----- ----- Basin Index (%) 123 125 SWEETWATER Deer Park 9700 28.3 11.8 240 30.6 16.1 190 Larsen Creek 9000 19.2 10.2 188 21.0 -M * South Pass 9040 26.2 12.4 211 23.4 14.4 162 ----- ----- Basin Index (%) 214 177 LOWER N. PLATTE Casper Mtn. 7900 10.8 11.3 96 10.1 11.8 86 Laprele Creek 8375 11.0 8.3 133 10.2 9.9 103 Reno Hill 8400 10.8 11.1 97 11.3 11.9 95 Windy Peak 7900 9.6 6.4 150 9.9 8.4 118 ----- ----- Basin Index (%) 114 99 LARAMIE RIVER Brooklyn Lake 10240 23.0 16.5 139 20.6 17.2 120 Cinnabar Park 9574 17.8 17.7 101 20.2 20.6 98 Crow Creek 8330 4.6 7.0 66 7.6 8.4 90 Deadman Hill 10220 19.0 12.8 148 18.1 13.7 132 Rawah 9020 12.1 9.2 132 14.9 11.4 131 Roach 9700 15.3 13.2 116 18.2 15.7 116 ----- ----- Basin Index (%) 120 114 S. PLATTE Black Mountain 8920 9.3 -M * 10.5 -M * Crow Creek 8330 4.6 7.0 66 7.6 8.4 90 Deadman Hill 10220 19.0 12.8 148 18.1 13.7 132 ----- ----- Basin Index (%) 119 116 LITTLE SNAKE RIVER Battle Mountain 7440 10.9 10.4 105 15.2 12.8 119 Divide Peak 8880 18.6 16.8 111 20.7 17.8 116 Elk River 8700 20.1 16.7 120 19.0 16.9 112 Little Snake River 8915 31.0 20.2 153 34.6 25.7 135 Old Battle 10000 34.8 25.3 138 35.5 29.4 121 Sage Creek Basin 7850 15.5 11.3 137 15.2 12.3 124 Sandstone RS 8150 12.3 11.8 104 15.1 15.8 96 Whiskey Park 8950 26.3 23.0 114 27.7 23.6 117 ----- ----- Basin Index (%) 125 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.8 10.6 187 21.0 11.1 189 Blind Bull Sum 8650 39.1 19.1 205 -M 16.8 * East Rim Divide 7930 18.3 9.3 197 19.5 10.1 193 Elkhart Park G.S. 9400 17.1 10.0 171 -M 11.1 * Gros Ventre Summit 8750 17.8 10.7 166 21.3 10.8 197 Gunsight Pass 9820 18.9 11.5 164 21.6 11.5 188 Kendall R.S. 7740 22.3 10.4 214 -M 12.4 * Loomis Park 8240 26.0 12.5 208 -M 14.8 * New Fork Lake 8340 15.7 8.9 176 15.7 9.2 171 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 20.0 10.5 190 25.1 12.1 207 Spring Creek Divide 9000 35.6 19.5 183 -M 20.3 * Triple Peak 8500 34.5 18.3 189 36.6 21.4 171 ----- ----- Basin Index (%) 188 187 LOWER GREEN RIVER Blacks Fork Jct 8869 10.7 -M * 13.6 -M * Buck Pasture 9632 18.6 -M * 20.6 -M * EF Blacks Fork GS 9360 15.5 -M * -M -M * Hams Fork 7840 17.4 9.9 176 18.2 9.6 190 Hewinta 9500 12.6 8.6 147 14.2 11.4 125 Hickerson Park 9122 8.4 6.3 133 8.4 8.0 105 Hole-in-Rock 9168 6.8 6.0 113 9.1 7.5 121 Indian Creek 9425 36.4 20.0 182 -M 18.8 * Kelley R.S. 8180 23.5 12.6 187 27.4 15.3 179 Spirit Lk 10235 13.6 -M * 14.7 -M * Steel Creek Park 10158 15.3 12.4 123 17.1 13.1 131 ----- ----- Basin Index (%) 159 145 UPPER BEAR RIVER Bear River RS 8777 13.3 -M * 15.4 -M * Bug Lake 7987 30.4 15.9 191 28.6 16.2 177 Burts Miller Ranch 8000 8.0 -M * 8.3 -M * Chalk Creek #1 9171 31.7 19.6 162 32.0 20.6 155 Hayden Fork 9130 23.2 13.0 178 -M 17.2 * Kelley R.S. 8180 23.5 12.6 187 27.4 15.3 179 Lily Lake 9133 14.3 10.9 131 17.0 14.0 121 Monte Cristo 8932 33.4 22.7 147 -M 21.5 * Salt River Summit 7760 20.2 11.0 184 25.4 14.1 180 ----- ----- Basin Index (%) 167 163 ----------------------------------------------------------------------------- -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.