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 SATURDAY: MARCH 11 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 -M 13.8 * -M 18.3 * Black Bear 8170 42.4 31.5 135 47.0 33.1 142 Blind Bull Sum 8650 40.2 19.4 207 -M 16.9 * Cottonwood Creek 7670 26.6 18.5 144 34.2 20.7 165 East Rim Divide 7930 18.5 9.4 197 19.8 10.2 194 Grand Targhee 9260 39.9 31.9 125 34.7 25.7 135 Granite Creek 6770 30.0 14.6 205 33.8 17.5 193 Grassy Lake 7265 36.2 27.6 131 49.5 31.2 159 Gros Ventre Summit 8750 -M 10.9 * -M 10.9 * Gunsight Pass 9820 19.4 11.6 167 21.9 11.6 189 Lewis Lake Divide 7850 38.0 26.5 143 44.3 30.8 144 Phillips Bench 8200 34.7 21.2 164 39.9 24.2 165 Salt River Summit 7760 20.4 11.2 182 -M 14.2 * Snake River Station 6920 21.4 15.2 141 32.5 19.6 166 Spring Creek Divide 9000 36.3 19.6 185 -M 20.4 * Thumb Divide 7980 21.7 13.2 164 -M 15.8 * Togwotee Pass 9580 30.2 19.5 155 34.1 20.7 165 Two Ocean Plateau 9240 -M 23.1 * -M 23.3 * Willow Creek 8380 30.6 24.1 127 44.5 28.5 156 Younts Peak 8350 26.2 12.4 211 28.4 13.4 212 ----- ----- Basin Index (%) 157 162 MADISON-GALLATIN Black Bear 8170 42.4 31.5 135 47.0 33.1 142 Canyon 7870 16.7 11.5 145 23.2 14.0 166 Madison Plateau 7750 25.0 19.3 130 32.5 22.8 143 West Yellowstone 6700 12.2 9.7 126 20.8 12.4 168 Whiskey Creek 6800 15.2 13.2 115 24.0 17.4 138 ----- ----- Basin Index (%) 131 148 YELLOWSTONE Beartooth Lake 9360 28.9 18.4 157 24.5 16.8 146 Burnt Mtn 5880 6.0 4.3 140 11.9 10.2 117 Canyon 7870 16.7 11.5 145 23.2 14.0 166 Cole Creek 7850 9.2 11.2 82 6.6 9.9 67 Evening Star 9200 34.3 20.9 164 -M 23.4 * Fisher Creek 9100 38.1 27.0 141 41.5 27.2 153 Northeast Entrance 7350 11.8 8.6 137 17.8 10.5 170 Parker Peak 9400 29.6 16.7 177 -M 15.0 * Sylvan Lake 8420 22.3 17.0 131 33.6 19.0 177 Thumb Divide 7980 21.7 13.2 164 -M 15.8 * Two Ocean Plateau 9240 -M 23.1 * -M 23.3 * White Mill 8700 30.4 19.2 158 31.3 20.3 154 Wolverine 7650 13.6 9.0 151 19.2 10.5 183 ----- ----- Basin Index (%) 148 151 WIND RIVER Burroughs Creek 8750 23.1 -M * 24.8 -M * Castle Creek 8400 12.2 -M * 14.1 -M * Cold Springs 9630 12.5 5.9 212 14.8 8.0 185 Deer Park 9700 28.4 12.1 235 31.9 16.3 196 Hobbs Park 10100 22.3 11.0 203 20.4 10.4 196 Kirwin 9550 17.8 7.8 228 20.5 9.4 218 Little Warm 9370 15.5 8.7 178 21.1 10.5 201 Owl Creek 8975 7.0 4.3 163 8.7 4.6 189 South Pass 9040 26.3 12.5 210 23.6 14.5 163 St. Lawrence Alt 8620 6.8 5.9 115 12.0 7.0 171 Togwotee Pass 9580 30.2 19.5 155 34.1 20.7 165 Townsend Creek 8700 12.5 7.4 169 15.8 9.4 168 ----- ----- Basin Index (%) 189 183 BIGHORN BASIN Bald Mtn. 9380 16.4 16.0 102 14.3 13.9 103 Bear Trap Meadow 8200 5.0 4.7 106 6.1 6.6 92 Bone Springs Div 9350 14.9 13.3 112 14.3 12.6 113 Grave Springs 8550 5.8 7.5 77 6.2 8.3 75 Kirwin 9550 17.8 7.8 228 20.5 9.4 218 Marquette 8760 7.6 -M * 11.7 -M * Middle Powder 7760 6.6 8.8 75 6.2 9.3 67 Owl Creek 8975 7.0 4.3 163 8.7 4.6 189 Powder River Pass 9480 6.7 8.5 79 9.9 10.2 97 Shell Creek 9580 13.9 12.3 113 11.0 11.2 98 Timber Creek 7950 5.4 4.1 132 6.9 5.6 123 ----- ----- Basin Index (%) 114 114 SHOSHONE RIVER Blackwater 9780 34.1 19.1 179 36.6 17.2 213 Evening Star 9200 34.3 20.9 164 -M 23.4 * Marquette 8760 7.6 -M * 11.7 -M * Sylvan Road 7120 15.2 10.0 152 27.8 14.6 190 Younts Peak 8350 26.2 12.4 211 28.4 13.4 212 ----- ----- Basin Index (%) 176 205 POWDER RIVER Bear Trap Meadow 8200 5.0 4.7 106 6.1 6.6 92 Cloud Peak Reservoir 9860 11.1 11.8 94 12.4 10.3 120 Grave Springs 8550 5.8 7.5 77 6.2 8.3 75 Hansen Sawmill 8360 7.1 5.2 137 9.1 6.5 140 Middle Powder 7760 6.6 8.8 75 6.2 9.3 67 Powder River Pass 9480 6.7 8.5 79 9.9 10.2 97 Soldier Park 8720 11.0 -M * 8.8 -M * ----- ----- Basin Index (%) 91 97 TONGUE RIVER Big Goose 7990 8.2 6.9 119 9.1 8.4 108 Bone Springs Div 9350 14.9 13.3 112 14.3 12.6 113 Burgess Junction 7880 8.1 9.3 87 8.9 9.7 92 Dome Lake 8880 12.0 9.4 128 11.7 10.6 110 Little Goose 8870 8.9 -M * 11.4 -M * Sucker Creek 8880 9.8 10.1 97 9.6 11.4 84 Tie Creek 6870 5.6 4.7 119 9.7 9.0 108 ----- ----- Basin Index (%) 109 103 BELLE FOURCHE Cole Canyon 5910 3.1 5.1 61 6.0 7.4 81 ----- ----- Basin Index (%) 61 81 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.8 63 7.1 10.0 71 North Rapid Creek 6130 4.8 6.3 76 6.0 8.1 74 ----- ----- Basin Index (%) 69 72 UPPER N. PLATTE Arapaho Ridge 10960 23.3 17.7 132 23.5 18.8 125 Blackhall Mtn 9820 34.6 -M * -M -M * Columbine 9160 24.2 21.1 115 25.8 21.8 118 Divide Peak 8880 18.8 17.0 111 20.8 18.0 116 Joe Wright 10120 18.0 18.4 98 25.6 21.4 120 Laprele Creek 8375 11.1 8.5 131 10.3 10.1 102 Med Bow 10500 35.9 -M * 30.8 -M * North French Creek 10130 23.7 23.0 103 24.4 22.5 108 Never Summer 10280 21.2 17.0 125 17.2 -M * Old Battle 10000 35.2 25.6 138 35.8 29.8 120 Rawah 9020 11.6 9.3 125 15.0 11.5 130 Sage Creek Basin 7850 15.7 11.6 135 15.2 12.4 123 Sand Lake 10050 27.6 22.6 122 25.0 20.4 123 South Brush Creek 8440 10.7 11.1 96 11.3 12.6 90 Tower 10500 39.2 38.2 103 41.5 33.9 122 Webber Springs 9250 28.2 20.2 140 31.5 22.6 139 Willow Creek Pass 9540 16.2 10.3 157 17.1 11.0 155 Zirkel 9340 39.8 25.2 158 39.8 24.6 162 ----- ----- Basin Index (%) 123 124 SWEETWATER Deer Park 9700 28.4 12.1 235 31.9 16.3 196 Larsen Creek 9000 19.5 10.4 188 21.0 -M * South Pass 9040 26.3 12.5 210 23.6 14.5 163 ----- ----- Basin Index (%) 212 180 LOWER N. PLATTE Casper Mtn. 7900 10.8 11.5 94 10.3 11.9 87 Laprele Creek 8375 11.1 8.5 131 10.3 10.1 102 Reno Hill 8400 11.0 11.2 98 11.5 12.0 96 Windy Peak 7900 9.6 6.6 145 9.9 8.5 116 ----- ----- Basin Index (%) 112 99 LARAMIE RIVER Brooklyn Lake 10240 23.5 16.8 140 20.9 17.4 120 Cinnabar Park 9574 18.0 17.8 101 20.3 20.6 99 Crow Creek 8330 4.7 7.1 66 7.6 8.4 90 Deadman Hill 10220 19.0 13.0 146 18.0 14.0 129 Rawah 9020 11.6 9.3 125 15.0 11.5 130 Roach 9700 15.4 13.4 115 18.2 15.9 114 ----- ----- Basin Index (%) 119 114 S. PLATTE Black Mountain 8920 9.3 -M * 10.5 -M * Crow Creek 8330 4.7 7.1 66 7.6 8.4 90 Deadman Hill 10220 19.0 13.0 146 18.0 14.0 129 ----- ----- Basin Index (%) 118 114 LITTLE SNAKE RIVER Battle Mountain 7440 10.7 10.6 101 15.6 12.9 121 Divide Peak 8880 18.8 17.0 111 20.8 18.0 116 Elk River 8700 20.2 16.9 120 19.1 17.1 112 Little Snake River 8915 31.2 20.3 154 36.4 25.8 141 Old Battle 10000 35.2 25.6 138 35.8 29.8 120 Sage Creek Basin 7850 15.7 11.6 135 15.2 12.4 123 Sandstone RS 8150 12.6 11.8 107 15.1 16.0 94 Whiskey Park 8950 27.1 23.3 116 28.1 23.9 118 ----- ----- Basin Index (%) 125 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.8 10.8 183 21.6 11.2 193 Blind Bull Sum 8650 40.2 19.4 207 -M 16.9 * East Rim Divide 7930 18.5 9.4 197 19.8 10.2 194 Elkhart Park G.S. 9400 17.8 10.1 176 21.9 11.1 197 Gros Ventre Summit 8750 -M 10.9 * -M 10.9 * Gunsight Pass 9820 19.4 11.6 167 21.9 11.6 189 Kendall R.S. 7740 23.1 10.5 220 27.3 12.5 218 Loomis Park 8240 26.8 12.7 211 30.3 14.9 203 New Fork Lake 8340 16.4 9.0 182 16.2 9.3 174 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M 10.6 * 25.2 12.2 207 Spring Creek Divide 9000 36.3 19.6 185 -M 20.4 * Triple Peak 8500 35.3 18.6 190 37.4 21.6 173 ----- ----- Basin Index (%) 193 193 LOWER GREEN RIVER Blacks Fork Jct 8869 10.4 -M * 13.6 -M * Buck Pasture 9632 18.7 -M * 20.6 -M * EF Blacks Fork GS 9360 15.5 -M * 11.8 -M * Hams Fork 7840 17.1 10.0 171 18.3 9.6 191 Hewinta 9500 12.3 8.6 143 14.2 11.5 123 Hickerson Park 9122 8.4 6.4 131 8.6 8.1 106 Hole-in-Rock 9168 6.5 6.1 107 9.2 7.6 121 Indian Creek 9425 36.6 20.3 180 -M 19.0 * Kelley R.S. 8180 24.0 12.7 189 28.3 15.4 184 Spirit Lk 10235 13.5 -M * 14.7 -M * Steel Creek Park 10158 15.4 12.6 122 17.1 13.3 129 ----- ----- Basin Index (%) 157 146 UPPER BEAR RIVER Bear River RS 8777 12.7 -M * 15.5 -M * Bug Lake 7987 -M 16.1 * -M 16.4 * Burts Miller Ranch 8000 7.2 -M * 8.3 -M * Chalk Creek #1 9171 31.6 20.0 158 32.0 20.8 154 Hayden Fork 9130 22.7 13.4 169 -M 17.4 * Kelley R.S. 8180 24.0 12.7 189 28.3 15.4 184 Lily Lake 9133 14.5 11.1 131 17.0 14.1 121 Monte Cristo 8932 33.5 22.9 146 31.8 21.8 146 Salt River Summit 7760 20.4 11.2 182 -M 14.2 * ----- ----- Basin Index (%) 161 151* ----------------------------------------------------------------------------- -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.