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 FRIDAY: MARCH 3 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.3 13.6 179 31.7 17.4 182 Black Bear 8170 37.7 29.9 126 44.3 31.3 142 Blind Bull Sum 8650 37.0 18.2 203 -M 16.1 * Cottonwood Creek 7670 25.1 17.2 146 31.7 19.8 160 East Rim Divide 7930 17.4 8.3 210 18.9 9.6 197 Grand Targhee 9260 36.2 30.5 119 -M 25.0 * Granite Creek 6770 28.0 13.9 201 -M 16.6 * Grassy Lake 7265 32.7 26.4 124 44.9 29.8 151 Gros Ventre Summit 8750 -M 10.0 * -M 10.2 * Gunsight Pass 9820 17.9 10.7 167 20.6 10.9 189 Lewis Lake Divide 7850 33.3 25.3 132 42.3 29.2 145 Phillips Bench 8200 31.2 19.9 157 39.1 23.0 170 Salt River Summit 7760 19.2 10.7 179 24.7 13.6 182 Snake River Station 6920 20.0 14.4 139 30.1 18.8 160 Spring Creek Divide 9000 33.5 18.8 178 -M 19.5 * Thumb Divide 7980 20.0 12.4 161 -M 14.8 * Togwotee Pass 9580 27.8 18.1 154 31.9 19.6 163 Two Ocean Plateau 9240 -M 21.7 * -M 21.9 * Willow Creek 8380 28.6 22.6 127 41.8 27.1 154 Younts Peak 8350 22.9 11.7 196 25.6 12.8 200 ----- ----- Basin Index (%) 153 163 MADISON-GALLATIN Black Bear 8170 37.7 29.9 126 44.3 31.3 142 Canyon 7870 15.3 10.7 143 21.6 13.2 164 Madison Plateau 7750 22.9 18.0 127 30.7 21.5 143 West Yellowstone 6700 11.8 9.1 130 19.9 11.7 170 Whiskey Creek 6800 14.0 12.1 116 22.6 16.5 137 ----- ----- Basin Index (%) 127 148 YELLOWSTONE Beartooth Lake 9360 25.8 17.1 151 21.3 15.9 134 Burnt Mtn 5880 5.2 4.1 127 11.3 9.6 118 Canyon 7870 15.3 10.7 143 21.6 13.2 164 Cole Creek 7850 8.5 10.2 83 6.2 9.2 67 Evening Star 9200 30.8 19.4 159 36.3 22.3 163 Fisher Creek 9100 33.0 26.0 127 37.3 25.8 145 Northeast Entrance 7350 10.4 8.3 125 16.0 10.0 160 Parker Peak 9400 26.7 16.2 165 25.1 14.2 177 Sylvan Lake 8420 20.6 16.0 129 31.7 18.1 175 Thumb Divide 7980 20.0 12.4 161 -M 14.8 * Two Ocean Plateau 9240 -M 21.7 * -M 21.9 * White Mill 8700 25.4 18.5 137 27.1 19.2 141 Wolverine 7650 14.0 8.6 163 17.8 10.1 176 ----- ----- Basin Index (%) 141 150 WIND RIVER Burroughs Creek 8750 20.6 -M * 22.7 -M * Castle Creek 8400 11.4 -M * 13.5 -M * Cold Springs 9630 11.8 5.6 211 14.1 7.5 188 Deer Park 9700 27.9 10.9 256 29.0 15.4 188 Hobbs Park 10100 21.5 9.9 217 19.9 9.6 207 Kirwin 9550 16.0 7.1 225 18.9 8.9 212 Little Warm 9370 13.9 8.1 172 19.5 9.9 197 Owl Creek 8975 6.7 4.0 168 8.4 4.4 191 South Pass 9040 25.5 11.6 220 23.2 13.6 171 St. Lawrence Alt 8620 7.4 5.3 140 11.9 6.6 180 Togwotee Pass 9580 27.8 18.1 154 31.9 19.6 163 Townsend Creek 8700 12.4 6.7 185 15.5 8.7 178 ----- ----- Basin Index (%) 196 185 BIGHORN BASIN Bald Mtn. 9380 15.4 15.0 103 13.4 13.3 101 Bear Trap Meadow 8200 4.5 4.5 100 5.7 6.2 92 Bone Springs Div 9350 13.6 12.3 111 13.2 11.9 111 Grave Springs 8550 5.1 7.0 73 5.7 8.0 71 Kirwin 9550 16.0 7.1 225 18.9 8.9 212 Marquette 8760 7.3 -M * 11.1 -M * Middle Powder 7760 6.0 8.2 73 6.1 8.8 69 Owl Creek 8975 6.7 4.0 168 8.4 4.4 191 Powder River Pass 9480 6.2 8.0 78 9.0 9.7 93 Shell Creek 9580 13.0 11.8 110 10.2 10.7 95 Timber Creek 7950 5.3 3.9 136 6.6 5.3 125 ----- ----- Basin Index (%) 112 111 SHOSHONE RIVER Blackwater 9780 30.1 17.5 172 33.3 16.3 204 Evening Star 9200 30.8 19.4 159 36.3 22.3 163 Marquette 8760 7.3 -M * 11.1 -M * Sylvan Road 7120 14.3 9.6 149 25.6 14.0 183 Younts Peak 8350 22.9 11.7 196 25.6 12.8 200 ----- ----- Basin Index (%) 169 185 POWDER RIVER Bear Trap Meadow 8200 4.5 4.5 100 5.7 6.2 92 Cloud Peak Reservoir 9860 10.1 10.5 96 11.4 9.7 118 Grave Springs 8550 5.1 7.0 73 5.7 8.0 71 Hansen Sawmill 8360 6.8 4.7 145 8.6 6.2 139 Middle Powder 7760 6.0 8.2 73 6.1 8.8 69 Powder River Pass 9480 6.2 8.0 78 9.0 9.7 93 Soldier Park 8720 10.1 -M * 8.5 -M * ----- ----- Basin Index (%) 90 96 TONGUE RIVER Big Goose 7990 7.2 6.3 114 8.2 8.0 102 Bone Springs Div 9350 13.6 12.3 111 13.2 11.9 111 Burgess Junction 7880 7.5 8.4 89 8.4 9.1 92 Dome Lake 8880 9.5 8.8 108 10.6 10.0 106 Little Goose 8870 7.9 -M * 10.3 -M * Sucker Creek 8880 8.8 9.1 97 8.6 10.7 80 Tie Creek 6870 5.0 4.4 114 9.2 8.6 107 ----- ----- Basin Index (%) 105 100 BELLE FOURCHE Cole Canyon 5910 3.1 4.9 63 5.8 7.2 81 ----- ----- Basin Index (%) 63 81 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.4 67 6.8 9.5 72 North Rapid Creek 6130 4.5 6.0 75 5.8 7.7 75 ----- ----- Basin Index (%) 71 73 UPPER N. PLATTE Arapaho Ridge 10960 22.6 16.9 134 22.8 17.9 127 Blackhall Mtn 9820 33.2 -M * 31.5 -M * Columbine 9160 22.7 20.1 113 24.5 20.6 119 Divide Peak 8880 17.9 16.1 111 20.2 16.9 120 Joe Wright 10120 17.7 16.9 105 25.1 20.1 125 Laprele Creek 8375 10.4 7.8 133 9.9 9.4 105 Med Bow 10500 33.9 -M * 30.3 -M * North French Creek 10130 22.4 21.2 106 23.4 21.2 110 Never Summer 10280 20.5 16.3 126 16.8 -M * Old Battle 10000 33.5 24.2 138 31.6 28.1 112 Rawah 9020 12.0 8.8 136 14.7 11.0 134 Sage Creek Basin 7850 14.9 10.7 139 14.7 11.8 125 Sand Lake 10050 25.9 21.3 122 24.0 19.1 126 South Brush Creek 8440 10.1 10.4 97 10.6 11.8 90 Tower 10500 38.0 36.7 104 38.2 32.3 118 Webber Springs 9250 25.5 18.9 135 30.1 21.3 141 Willow Creek Pass 9540 16.0 9.7 165 16.7 10.5 159 Zirkel 9340 38.0 23.3 163 37.2 23.6 158 ----- ----- Basin Index (%) 125 125 SWEETWATER Deer Park 9700 27.9 10.9 256 29.0 15.4 188 Larsen Creek 9000 18.1 9.7 187 20.5 -M * South Pass 9040 25.5 11.6 220 23.2 13.6 171 ----- ----- Basin Index (%) 222 180 LOWER N. PLATTE Casper Mtn. 7900 9.4 10.4 90 8.9 11.2 79 Laprele Creek 8375 10.4 7.8 133 9.9 9.4 105 Reno Hill 8400 9.9 10.3 96 10.2 11.2 91 Windy Peak 7900 9.0 5.8 155 9.5 7.8 122 ----- ----- Basin Index (%) 113 97 LARAMIE RIVER Brooklyn Lake 10240 22.0 15.3 144 19.8 16.2 122 Cinnabar Park 9574 17.3 17.3 100 19.7 19.8 99 Crow Creek 8330 4.6 6.8 68 7.4 7.9 94 Deadman Hill 10220 18.4 12.5 147 17.4 12.9 135 Rawah 9020 12.0 8.8 136 14.7 11.0 134 Roach 9700 15.1 12.6 120 17.8 14.8 120 ----- ----- Basin Index (%) 122 117 S. PLATTE Black Mountain 8920 9.2 -M * 10.3 -M * Crow Creek 8330 4.6 6.8 68 7.4 7.9 94 Deadman Hill 10220 18.4 12.5 147 17.4 12.9 135 ----- ----- Basin Index (%) 119 119 LITTLE SNAKE RIVER Battle Mountain 7440 11.1 9.9 112 14.7 12.2 120 Divide Peak 8880 17.9 16.1 111 20.2 16.9 120 Elk River 8700 19.6 15.8 124 18.9 16.1 117 Little Snake River 8915 29.8 19.8 151 33.4 25.2 133 Old Battle 10000 33.5 24.2 138 31.6 28.1 112 Sage Creek Basin 7850 14.9 10.7 139 14.7 11.8 125 Sandstone RS 8150 12.1 10.7 113 14.6 15.2 96 Whiskey Park 8950 25.2 21.8 116 26.7 22.6 118 ----- ----- Basin Index (%) 127 118 UPPER GREEN RIVER Big Sandy Opening 9080 19.2 10.2 188 20.7 10.6 195 Blind Bull Sum 8650 37.0 18.2 203 -M 16.1 * East Rim Divide 7930 17.4 8.3 210 18.9 9.6 197 Elkhart Park G.S. 9400 16.2 9.5 171 20.5 10.6 193 Gros Ventre Summit 8750 -M 10.0 * -M 10.2 * Gunsight Pass 9820 17.9 10.7 167 20.6 10.9 189 Kendall R.S. 7740 20.9 9.9 211 24.4 11.8 207 Loomis Park 8240 24.4 11.9 205 27.5 14.2 194 New Fork Lake 8340 15.0 8.3 181 15.1 8.8 172 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.9 9.9 191 23.7 11.7 203 Spring Creek Divide 9000 33.5 18.8 178 -M 19.5 * Triple Peak 8500 33.1 17.1 194 34.9 20.5 170 ----- ----- Basin Index (%) 191 190 LOWER GREEN RIVER Blacks Fork Jct 8869 10.4 -M * 13.0 -M * Buck Pasture 9632 17.5 -M * 19.6 -M * EF Blacks Fork GS 9360 14.4 -M * 13.5 -M * Hams Fork 7840 16.1 9.4 171 17.7 9.2 192 Hewinta 9500 12.0 8.0 150 13.8 11.0 125 Hickerson Park 9122 8.1 6.0 135 8.1 7.6 107 Hole-in-Rock 9168 6.6 5.7 116 8.7 7.2 121 Indian Creek 9425 34.3 19.1 180 -M 18.0 * Kelley R.S. 8180 24.0 12.2 197 26.9 14.7 183 Spirit Lk 10235 13.6 -M * 14.4 -M * Steel Creek Park 10158 14.7 11.7 126 16.2 12.6 129 ----- ----- Basin Index (%) 161 147 UPPER BEAR RIVER Bear River RS 8777 12.4 -M * 14.9 -M * Bug Lake 7987 28.4 15.0 189 28.1 15.6 180 Burts Miller Ranch 8000 7.7 -M * 8.3 -M * Chalk Creek #1 9171 30.6 18.6 165 31.1 19.8 157 Hayden Fork 9130 22.1 12.3 180 25.8 16.6 155 Kelley R.S. 8180 24.0 12.2 197 26.9 14.7 183 Lily Lake 9133 14.4 10.5 137 16.6 13.4 124 Monte Cristo 8932 31.8 21.5 148 29.9 20.8 144 Salt River Summit 7760 19.2 10.7 179 24.7 13.6 182 ----- ----- Basin Index (%) 169 160 ----------------------------------------------------------------------------- -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.