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: APRIL 14 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.1 13.5 171 40.1 21.2 189 Black Bear 8170 45.6 36.5 125 54.8 38.8 141 Blind Bull Sum 8650 44.2 23.8 186 -M 19.7 * Cottonwood Creek 7670 27.4 20.1 136 39.2 25.1 156 East Rim Divide 7930 14.2 10.0 142 21.0 11.9 176 Grand Targhee 9260 47.4 40.7 116 -M 31.7 * Granite Creek 6770 24.4 12.7 192 36.3 19.8 183 Grassy Lake 7265 37.5 31.4 119 55.7 36.5 153 Gros Ventre Summit 8750 20.4 12.9 158 24.9 13.2 189 Gunsight Pass 9820 23.8 13.5 176 25.7 14.2 181 Lewis Lake Divide 7850 46.0 30.2 152 56.1 35.9 156 Phillips Bench 8200 37.8 26.0 145 47.2 28.5 166 Salt River Summit 7760 19.4 11.5 169 -M 17.0 * Snake River Station 6920 16.3 13.2 123 36.1 22.8 158 Spring Creek Divide 9000 42.2 23.1 183 41.2 24.2 170 Thumb Divide 7980 21.5 14.5 148 28.3 18.9 150 Togwotee Pass 9580 33.9 22.9 148 39.4 24.8 159 Two Ocean Plateau 9240 -M 27.0 * -M 27.7 * Willow Creek 8380 28.3 26.9 105 50.7 34.3 148 Younts Peak 8350 26.0 14.7 177 31.8 16.1 198 ----- ----- Basin Index (%) 146 163 MADISON-GALLATIN Black Bear 8170 45.6 36.5 125 54.8 38.8 141 Canyon 7870 17.6 12.3 143 26.1 16.5 158 Madison Plateau 7750 27.6 22.4 123 36.7 26.7 137 West Yellowstone 6700 4.6 8.4 55 23.6 14.3 165 Whiskey Creek 6800 13.1 14.7 89 27.4 20.6 133 ----- ----- Basin Index (%) 115 144 YELLOWSTONE Beartooth Lake 9360 32.8 22.2 148 28.7 20.2 142 Burnt Mtn 5880 .0 1.0 0 15.0 13.4 112 Canyon 7870 17.6 12.3 143 26.1 16.5 158 Cole Creek 7850 12.2 15.5 79 9.5 13.8 69 Evening Star 9200 38.7 24.6 157 45.5 27.9 163 Fisher Creek 9100 44.0 31.8 138 48.1 32.4 148 Northeast Entrance 7350 6.2 8.2 76 20.9 12.6 166 Parker Peak 9400 37.4 20.4 183 35.2 18.1 194 Sylvan Lake 8420 24.4 19.9 123 38.0 22.8 167 Thumb Divide 7980 21.5 14.5 148 28.3 18.9 150 Two Ocean Plateau 9240 -M 27.0 * -M 27.7 * White Mill 8700 37.4 23.4 160 36.9 24.2 152 Wolverine 7650 4.3 8.9 48 21.4 12.5 171 ----- ----- Basin Index (%) 136 152 WIND RIVER Burroughs Creek 8750 22.7 -M * 28.0 -M * Castle Creek 8400 9.7 -M * 16.0 -M * Cold Springs 9630 16.9 5.9 286 20.4 10.3 198 Deer Park 9700 33.4 16.1 207 38.6 20.6 187 Hobbs Park 10100 30.3 14.9 203 29.2 14.1 207 Kirwin 9550 -M 9.9 * 25.9 11.9 218 Little Warm 9370 18.9 10.3 183 25.4 13.3 191 Owl Creek 8975 10.0 5.3 189 13.5 6.3 214 South Pass 9040 32.4 15.8 205 29.1 18.0 162 St. Lawrence Alt 8620 9.6 6.6 145 17.6 9.4 187 Togwotee Pass 9580 33.9 22.9 148 39.4 24.8 159 Townsend Creek 8700 18.2 10.0 182 23.7 12.7 187 ----- ----- Basin Index (%) 189 186 BIGHORN BASIN Bald Mtn. 9380 20.9 19.4 108 18.1 17.6 103 Bear Trap Meadow 8200 5.0 4.5 111 9.7 9.0 108 Bone Springs Div 9350 20.8 16.9 123 19.0 16.1 118 Grave Springs 8550 7.5 9.6 78 8.8 11.1 79 Kirwin 9550 -M 9.9 * 25.9 11.9 218 Marquette 8760 14.5 -M * 18.2 -M * Middle Powder 7760 8.8 12.4 71 8.7 12.3 71 Owl Creek 8975 10.0 5.3 189 13.5 6.3 214 Powder River Pass 9480 9.5 10.2 93 14.5 13.1 111 Shell Creek 9580 18.6 15.6 119 15.8 14.3 110 Timber Creek 7950 7.7 5.2 148 11.9 7.8 153 ----- ----- Basin Index (%) 110 122 SHOSHONE RIVER Blackwater 9780 38.6 23.6 164 42.9 21.2 202 Evening Star 9200 38.7 24.6 157 45.5 27.9 163 Marquette 8760 14.5 -M * 18.2 -M * Sylvan Road 7120 -M 10.3 * 30.7 17.0 181 Younts Peak 8350 26.0 14.7 177 31.8 16.1 198 ----- ----- Basin Index (%) 164 184 POWDER RIVER Bear Trap Meadow 8200 5.0 4.5 111 9.7 9.0 108 Cloud Peak Reservoir 9860 17.6 15.4 114 20.3 14.0 145 Grave Springs 8550 7.5 9.6 78 8.8 11.1 79 Hansen Sawmill 8360 12.1 6.0 202 15.8 9.0 176 Middle Powder 7760 8.8 12.4 71 8.7 12.3 71 Powder River Pass 9480 9.5 10.2 93 14.5 13.1 111 Soldier Park 8720 15.7 -M * 15.9 -M * ----- ----- Basin Index (%) 104 114 TONGUE RIVER Big Goose 7990 12.4 9.8 127 15.2 12.1 126 Bone Springs Div 9350 20.8 16.9 123 19.0 16.1 118 Burgess Junction 7880 11.2 12.2 92 13.0 12.9 101 Dome Lake 8880 17.1 12.0 142 17.7 14.3 124 Little Goose 8870 14.8 -M * 18.8 -M * Sucker Creek 8880 13.8 12.6 110 15.1 15.1 100 Tie Creek 6870 2.5 5.0 50 14.5 12.2 119 ----- ----- Basin Index (%) 114 114 BELLE FOURCHE Cole Canyon 5910 .0 3.5 0 8.0 9.9 81 ----- ----- Basin Index (%) 0 81 CHEYENNE RIVER BASIN Blind Park 6890 .0 5.5 0 9.7 12.4 78 North Rapid Creek 6130 .0 5.7 0 8.2 10.3 80 ----- ----- Basin Index (%) 0 79 UPPER N. PLATTE Arapaho Ridge 10960 24.9 21.6 115 26.4 23.7 111 Blackhall Mtn 9820 36.3 -M * 38.1 -M * Columbine 9160 15.3 22.2 69 27.7 26.2 106 Divide Peak 8880 14.8 20.2 73 23.3 22.2 105 Joe Wright 10120 17.8 22.0 81 28.8 26.8 107 Laprele Creek 8375 8.8 9.2 96 12.9 13.1 98 Med Bow 10500 36.9 -M * 35.7 -M * North French Creek 10130 25.0 31.5 79 27.9 27.6 101 Never Summer 10280 21.8 20.6 106 19.6 -M * Old Battle 10000 36.6 32.2 114 38.9 36.0 108 Rawah 9020 6.9 9.8 70 17.5 15.0 117 Sage Creek Basin 7850 2.5 9.4 27 16.8 15.0 112 Sand Lake 10050 31.0 30.2 103 28.1 25.8 109 South Brush Creek 8440 -M 11.2 * 13.4 15.9 84 Tower 10500 39.3 47.4 83 44.2 41.0 108 Webber Springs 9250 26.2 23.5 111 33.8 27.6 122 Willow Creek Pass 9540 18.1 12.6 144 18.6 14.0 133 Zirkel 9340 -M 24.3 * 42.6 29.2 146 ----- ----- Basin Index (%) 93 112 SWEETWATER Deer Park 9700 33.4 16.1 207 38.6 20.6 187 Larsen Creek 9000 14.6 10.9 134 23.6 -M * South Pass 9040 32.4 15.8 205 29.1 18.0 162 ----- ----- Basin Index (%) 188 175 LOWER N. PLATTE Casper Mtn. 7900 11.3 14.5 78 13.7 15.9 86 Laprele Creek 8375 8.8 9.2 96 12.9 13.1 98 Reno Hill 8400 12.7 14.2 89 15.5 16.4 95 Windy Peak 7900 6.7 7.5 89 12.1 11.1 109 ----- ----- Basin Index (%) 87 96 LARAMIE RIVER Brooklyn Lake 10240 22.4 22.3 100 23.6 21.9 108 Cinnabar Park 9574 15.6 21.2 74 22.6 24.9 91 Crow Creek 8330 .0 4.8 0 9.3 11.4 82 Deadman Hill 10220 21.6 16.6 130 20.8 18.1 115 Rawah 9020 6.9 9.8 70 17.5 15.0 117 Roach 9700 16.2 16.5 98 21.7 19.9 109 ----- ----- Basin Index (%) 91 104 S. PLATTE Black Mountain 8920 9.8 -M * 13.3 -M * Crow Creek 8330 .0 4.8 0 9.3 11.4 82 Deadman Hill 10220 21.6 16.6 130 20.8 18.1 115 ----- ----- Basin Index (%) 101 102 LITTLE SNAKE RIVER Battle Mountain 7440 -M 7.2 * 17.1 15.5 110 Divide Peak 8880 14.8 20.2 73 23.3 22.2 105 Elk River 8700 10.0 17.5 57 20.5 20.7 99 Little Snake River 8915 24.9 25.9 96 39.2 30.7 128 Old Battle 10000 36.6 32.2 114 38.9 36.0 108 Sage Creek Basin 7850 2.5 9.4 27 16.8 15.0 112 Sandstone RS 8150 3.5 12.1 29 16.4 18.9 87 Whiskey Park 8950 24.3 27.2 89 30.6 28.7 107 ----- ----- Basin Index (%) 81 108 UPPER GREEN RIVER Big Sandy Opening 9080 21.1 12.9 164 23.6 13.6 174 Blind Bull Sum 8650 44.2 23.8 186 -M 19.7 * East Rim Divide 7930 14.2 10.0 142 21.0 11.9 176 Elkhart Park G.S. 9400 19.6 12.1 162 24.7 13.6 182 Gros Ventre Summit 8750 20.4 12.9 158 24.9 13.2 189 Gunsight Pass 9820 23.8 13.5 176 25.7 14.2 181 Kendall R.S. 7740 18.3 10.1 181 29.5 14.4 205 Loomis Park 8240 25.9 13.7 189 32.7 17.5 187 New Fork Lake 8340 14.5 9.7 149 18.2 10.9 167 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 17.8 11.8 151 27.9 14.4 194 Spring Creek Divide 9000 42.2 23.1 183 41.2 24.2 170 Triple Peak 8500 36.0 20.0 180 41.6 25.6 162 ----- ----- Basin Index (%) 172 179 LOWER GREEN RIVER Blacks Fork Jct 8869 7.6 -M * 16.5 -M * Buck Pasture 9632 17.2 -M * 24.2 -M * EF Blacks Fork GS 9360 13.8 -M * 17.9 -M * Hams Fork 7840 12.6 8.9 142 22.0 11.6 190 Hewinta 9500 8.1 10.0 81 17.9 14.5 123 Hickerson Park 9122 8.0 6.9 116 13.5 10.7 126 Hole-in-Rock 9168 6.7 7.0 96 14.0 10.1 139 Indian Creek 9425 41.0 24.1 170 41.8 23.0 182 Kelley R.S. 8180 25.3 13.9 182 31.2 18.4 170 Spirit Lk 10235 15.9 -M * 19.2 -M * Steel Creek Park 10158 19.5 16.1 121 21.7 17.2 126 ----- ----- Basin Index (%) 139 154 UPPER BEAR RIVER Bear River RS 8777 6.7 -M * 19.1 -M * Bug Lake 7987 32.7 19.2 170 34.8 19.9 175 Burts Miller Ranch 8000 .1 -M * 10.6 -M * Chalk Creek #1 9171 34.0 24.8 137 37.1 26.0 143 Hayden Fork 9130 17.0 14.2 120 30.4 21.7 140 Kelley R.S. 8180 25.3 13.9 182 31.2 18.4 170 Lily Lake 9133 12.5 12.6 99 20.5 17.7 116 Monte Cristo 8932 37.2 27.8 134 40.5 26.7 152 Salt River Summit 7760 19.4 11.5 169 -M 17.0 * ----- ----- Basin Index (%) 144 149 ----------------------------------------------------------------------------- -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.