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 8 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 25.7 13.8 186 -M 18.0 * Black Bear 8170 40.2 30.9 130 45.5 32.6 140 Blind Bull Sum 8650 38.2 19.0 201 -M 16.6 * Cottonwood Creek 7670 26.1 18.2 143 32.9 20.5 160 East Rim Divide 7930 18.1 9.2 197 19.3 10.0 193 Grand Targhee 9260 38.7 31.3 124 -M 25.4 * Granite Creek 6770 28.8 14.4 200 -M 17.3 * Grassy Lake 7265 34.4 27.2 126 47.1 30.8 153 Gros Ventre Summit 8750 17.6 10.7 164 21.2 10.7 198 Gunsight Pass 9820 18.7 11.3 165 21.5 11.4 189 Lewis Lake Divide 7850 35.1 25.9 136 -M 30.3 * Phillips Bench 8200 32.4 20.8 156 39.4 23.8 166 Salt River Summit 7760 19.9 11.0 181 25.2 14.1 179 Snake River Station 6920 21.4 14.9 144 -M 19.5 * Spring Creek Divide 9000 34.9 19.5 179 -M 20.1 * Thumb Divide 7980 20.8 12.8 162 -M 15.5 * Togwotee Pass 9580 28.8 19.2 150 32.9 20.4 161 Two Ocean Plateau 9240 -M 22.5 * -M 22.9 * Willow Creek 8380 29.1 23.8 122 43.0 28.0 154 Younts Peak 8350 23.9 12.1 198 26.1 13.2 198 ----- ----- Basin Index (%) 154 164 MADISON-GALLATIN Black Bear 8170 40.2 30.9 130 45.5 32.6 140 Canyon 7870 16.1 11.3 142 22.3 13.7 163 Madison Plateau 7750 24.3 18.8 129 31.8 22.4 142 West Yellowstone 6700 12.3 9.4 131 20.5 12.2 168 Whiskey Creek 6800 14.7 12.8 115 23.3 17.1 136 ----- ----- Basin Index (%) 129 146 YELLOWSTONE Beartooth Lake 9360 26.6 18.0 148 21.9 16.6 132 Burnt Mtn 5880 5.4 4.4 123 11.5 9.8 117 Canyon 7870 16.1 11.3 142 22.3 13.7 163 Cole Creek 7850 9.0 10.9 83 6.4 9.6 67 Evening Star 9200 31.6 20.5 154 -M 23.1 * Fisher Creek 9100 34.7 26.6 130 38.4 26.7 144 Northeast Entrance 7350 11.0 8.6 128 16.5 10.3 160 Parker Peak 9400 27.7 16.5 168 23.4 14.7 159 Sylvan Lake 8420 21.5 16.7 129 32.6 18.8 173 Thumb Divide 7980 20.8 12.8 162 -M 15.5 * Two Ocean Plateau 9240 -M 22.5 * -M 22.9 * White Mill 8700 26.6 18.9 141 28.1 19.9 141 Wolverine 7650 13.3 9.0 148 18.0 10.4 173 ----- ----- Basin Index (%) 140 146 WIND RIVER Burroughs Creek 8750 21.3 -M * 23.2 -M * Castle Creek 8400 11.7 -M * 13.9 -M * Cold Springs 9630 12.2 5.8 210 14.3 7.9 181 Deer Park 9700 28.4 11.6 245 30.3 16.1 188 Hobbs Park 10100 21.9 10.7 205 20.0 10.1 198 Kirwin 9550 16.9 7.6 222 19.6 9.2 213 Little Warm 9370 14.8 8.5 174 20.2 10.4 194 Owl Creek 8975 6.9 4.2 164 8.6 4.5 191 South Pass 9040 26.1 12.3 212 23.2 14.3 162 St. Lawrence Alt 8620 7.1 5.7 125 12.0 6.9 174 Togwotee Pass 9580 28.8 19.2 150 32.9 20.4 161 Townsend Creek 8700 12.5 7.2 174 15.6 9.1 171 ----- ----- Basin Index (%) 189 181 BIGHORN BASIN Bald Mtn. 9380 16.2 15.8 103 13.8 13.8 100 Bear Trap Meadow 8200 4.9 4.6 107 5.9 6.4 92 Bone Springs Div 9350 14.5 13.1 111 13.6 12.3 111 Grave Springs 8550 5.6 7.3 77 6.1 8.2 74 Kirwin 9550 16.9 7.6 222 19.6 9.2 213 Marquette 8760 7.6 -M * 11.5 -M * Middle Powder 7760 6.6 8.6 77 6.0 9.1 66 Owl Creek 8975 6.9 4.2 164 8.6 4.5 191 Powder River Pass 9480 6.8 8.3 82 9.6 10.0 96 Shell Creek 9580 13.5 12.2 111 10.6 11.0 96 Timber Creek 7950 5.4 4.0 135 6.8 5.5 124 ----- ----- Basin Index (%) 114 112 SHOSHONE RIVER Blackwater 9780 31.7 18.6 170 34.6 16.9 205 Evening Star 9200 31.6 20.5 154 -M 23.1 * Marquette 8760 7.6 -M * 11.5 -M * Sylvan Road 7120 14.7 9.9 148 26.4 14.5 182 Younts Peak 8350 23.9 12.1 198 26.1 13.2 198 ----- ----- Basin Index (%) 167 195 POWDER RIVER Bear Trap Meadow 8200 4.9 4.6 107 5.9 6.4 92 Cloud Peak Reservoir 9860 10.7 11.3 95 12.0 10.1 119 Grave Springs 8550 5.6 7.3 77 6.1 8.2 74 Hansen Sawmill 8360 7.0 5.0 140 8.9 6.4 139 Middle Powder 7760 6.6 8.6 77 6.0 9.1 66 Powder River Pass 9480 6.8 8.3 82 9.6 10.0 96 Soldier Park 8720 10.3 -M * 8.7 -M * ----- ----- Basin Index (%) 92 97 TONGUE RIVER Big Goose 7990 7.9 6.6 120 8.8 8.3 106 Bone Springs Div 9350 14.5 13.1 111 13.6 12.3 111 Burgess Junction 7880 8.0 9.0 89 8.6 9.5 91 Dome Lake 8880 11.0 9.2 120 11.4 10.4 110 Little Goose 8870 8.6 -M * 11.0 -M * Sucker Creek 8880 9.4 9.8 96 9.0 11.1 81 Tie Creek 6870 5.3 4.7 113 9.4 8.8 107 ----- ----- Basin Index (%) 107 101 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 4.2 6.6 64 7.0 9.8 71 North Rapid Creek 6130 4.6 6.2 74 5.7 7.9 72 ----- ----- Basin Index (%) 69 72 UPPER N. PLATTE Arapaho Ridge 10960 23.3 17.4 134 23.3 18.4 127 Blackhall Mtn 9820 34.1 -M * 32.4 -M * Columbine 9160 23.8 20.8 114 25.1 21.3 118 Divide Peak 8880 18.5 16.8 110 20.5 17.6 116 Joe Wright 10120 17.6 18.0 98 25.5 21.0 121 Laprele Creek 8375 10.9 8.2 133 10.1 9.8 103 Med Bow 10500 35.1 -M * 30.6 -M * North French Creek 10130 23.0 22.1 104 23.9 22.1 108 Never Summer 10280 21.0 16.7 126 17.1 -M * Old Battle 10000 34.7 25.1 138 35.2 29.3 120 Rawah 9020 12.0 9.1 132 14.9 11.4 131 Sage Creek Basin 7850 15.4 11.2 138 15.2 12.2 125 Sand Lake 10050 26.8 22.0 122 24.6 20.0 123 South Brush Creek 8440 10.4 11.0 95 10.8 12.3 88 Tower 10500 38.8 37.8 103 41.1 33.4 123 Webber Springs 9250 27.7 19.8 140 31.0 22.2 140 Willow Creek Pass 9540 16.2 10.1 160 16.6 10.9 152 Zirkel 9340 39.2 24.7 159 38.8 24.1 161 ----- ----- Basin Index (%) 124 125 SWEETWATER Deer Park 9700 28.4 11.6 245 30.3 16.1 188 Larsen Creek 9000 19.1 10.1 189 20.9 -M * South Pass 9040 26.1 12.3 212 23.2 14.3 162 ----- ----- Basin Index (%) 216 176 LOWER N. PLATTE Casper Mtn. 7900 10.6 11.2 95 10.0 11.6 86 Laprele Creek 8375 10.9 8.2 133 10.1 9.8 103 Reno Hill 8400 10.8 11.0 98 11.1 11.8 94 Windy Peak 7900 9.6 6.4 150 9.8 8.3 118 ----- ----- Basin Index (%) 114 99 LARAMIE RIVER Brooklyn Lake 10240 22.8 16.3 140 20.3 17.0 119 Cinnabar Park 9574 17.7 17.7 100 20.1 20.3 99 Crow Creek 8330 4.7 7.0 67 7.6 8.3 92 Deadman Hill 10220 18.9 12.8 148 17.5 13.7 128 Rawah 9020 12.0 9.1 132 14.9 11.4 131 Roach 9700 15.3 13.1 117 18.1 15.6 116 ----- ----- Basin Index (%) 120 114 S. PLATTE Black Mountain 8920 9.3 -M * 10.5 -M * Crow Creek 8330 4.7 7.0 67 7.6 8.3 92 Deadman Hill 10220 18.9 12.8 148 17.5 13.7 128 ----- ----- Basin Index (%) 119 114 LITTLE SNAKE RIVER Battle Mountain 7440 10.8 10.3 105 15.2 12.7 120 Divide Peak 8880 18.5 16.8 110 20.5 17.6 116 Elk River 8700 20.0 16.6 120 18.9 16.8 112 Little Snake River 8915 30.8 20.2 152 34.4 25.6 134 Old Battle 10000 34.7 25.1 138 35.2 29.3 120 Sage Creek Basin 7850 15.4 11.2 138 15.2 12.2 125 Sandstone RS 8150 12.4 11.7 106 14.7 15.7 94 Whiskey Park 8950 26.0 22.8 114 27.3 23.4 117 ----- ----- Basin Index (%) 125 118 UPPER GREEN RIVER Big Sandy Opening 9080 19.7 10.6 186 20.8 11.0 189 Blind Bull Sum 8650 38.2 19.0 201 -M 16.6 * East Rim Divide 7930 18.1 9.2 197 19.3 10.0 193 Elkhart Park G.S. 9400 16.8 9.9 170 20.8 11.0 189 Gros Ventre Summit 8750 17.6 10.7 164 21.2 10.7 198 Gunsight Pass 9820 18.7 11.3 165 21.5 11.4 189 Kendall R.S. 7740 22.0 10.3 214 -M 12.3 * Loomis Park 8240 25.7 12.5 206 -M 14.7 * New Fork Lake 8340 15.6 8.8 177 15.5 9.2 168 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.8 10.5 189 24.1 12.0 201 Spring Creek Divide 9000 34.9 19.5 179 -M 20.1 * Triple Peak 8500 34.1 18.2 187 36.0 21.2 170 ----- ----- Basin Index (%) 187 186 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 15.1 -M * 12.0 -M * Hams Fork 7840 17.2 9.8 176 18.1 9.5 191 Hewinta 9500 12.6 8.5 148 14.2 11.3 126 Hickerson Park 9122 8.3 6.2 134 8.4 8.0 105 Hole-in-Rock 9168 6.9 5.9 117 9.1 7.4 123 Indian Creek 9425 36.0 19.9 181 -M 18.7 * Kelley R.S. 8180 23.4 12.5 187 27.2 15.2 179 Spirit Lk 10235 13.7 -M * 14.7 -M * Steel Creek Park 10158 15.3 12.3 124 17.1 13.0 132 ----- ----- Basin Index (%) 159 146 UPPER BEAR RIVER Bear River RS 8777 13.2 -M * 15.5 -M * Bug Lake 7987 30.2 15.8 191 29.5 16.1 183 Burts Miller Ranch 8000 7.9 -M * 8.5 -M * Chalk Creek #1 9171 31.7 19.4 163 31.9 20.5 156 Hayden Fork 9130 23.1 12.8 180 -M 17.1 * Kelley R.S. 8180 23.4 12.5 187 27.2 15.2 179 Lily Lake 9133 14.3 10.8 132 17.0 13.9 122 Monte Cristo 8932 33.3 22.5 148 30.4 21.4 142 Salt River Summit 7760 19.9 11.0 181 25.2 14.1 179 ----- ----- Basin Index (%) 168 159 ----------------------------------------------------------------------------- -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.