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 TUESDAY: APRIL 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 24.6 14.7 167 40.0 21.0 190 Black Bear 8170 47.2 36.7 129 54.3 38.4 141 Blind Bull Sum 8650 43.8 23.5 186 -M 19.6 * Cottonwood Creek 7670 28.6 20.7 138 39.1 24.8 158 East Rim Divide 7930 15.7 10.2 154 21.3 11.8 181 Grand Targhee 9260 47.3 39.6 119 39.7 31.2 127 Granite Creek 6770 25.9 13.6 190 36.2 19.7 184 Grassy Lake 7265 37.5 31.4 119 55.5 36.1 154 Gros Ventre Summit 8750 -M 12.8 * -M 13.1 * Gunsight Pass 9820 23.9 13.8 173 25.7 14.1 182 Lewis Lake Divide 7850 46.6 30.2 154 55.9 35.6 157 Phillips Bench 8200 38.8 25.8 150 47.2 28.3 167 Salt River Summit 7760 20.1 12.3 163 -M 16.8 * Snake River Station 6920 18.5 14.2 130 36.2 22.6 160 Spring Creek Divide 9000 41.8 22.7 184 41.1 23.9 172 Thumb Divide 7980 22.7 14.6 155 28.3 18.8 151 Togwotee Pass 9580 34.1 22.6 151 39.2 24.5 160 Two Ocean Plateau 9240 -M 26.6 * -M 27.4 * Willow Creek 8380 29.2 27.8 105 50.7 33.9 150 Younts Peak 8350 26.2 14.5 181 31.5 15.9 198 ----- ----- Basin Index (%) 147 160 MADISON-GALLATIN Black Bear 8170 47.2 36.7 129 54.3 38.4 141 Canyon 7870 18.1 12.3 147 26.0 16.3 160 Madison Plateau 7750 27.7 22.0 126 36.6 26.4 139 West Yellowstone 6700 6.1 8.8 69 23.5 14.2 165 Whiskey Creek 6800 13.3 14.7 90 27.0 20.3 133 ----- ----- Basin Index (%) 119 145 YELLOWSTONE Beartooth Lake 9360 33.1 21.7 153 28.1 19.9 141 Burnt Mtn 5880 .0 3.0 0 15.0 13.2 114 Canyon 7870 18.1 12.3 147 26.0 16.3 160 Cole Creek 7850 12.6 15.2 83 9.5 13.3 71 Evening Star 9200 38.6 24.1 160 45.2 27.6 164 Fisher Creek 9100 43.5 31.5 138 47.2 31.8 148 Northeast Entrance 7350 7.8 8.6 91 20.8 12.3 169 Parker Peak 9400 36.1 20.0 180 35.0 17.8 197 Sylvan Lake 8420 24.6 19.7 125 37.9 22.5 168 Thumb Divide 7980 22.7 14.6 155 28.3 18.8 151 Two Ocean Plateau 9240 -M 26.6 * -M 27.4 * White Mill 8700 36.8 22.9 161 36.2 23.9 151 Wolverine 7650 4.2 9.4 45 21.2 12.3 172 ----- ----- Basin Index (%) 137 153 WIND RIVER Burroughs Creek 8750 23.2 -M * 27.7 -M * Castle Creek 8400 10.9 -M * 15.7 -M * Cold Springs 9630 17.7 6.3 281 20.3 10.2 199 Deer Park 9700 33.5 16.1 208 38.6 20.4 189 Hobbs Park 10100 30.2 14.6 207 28.7 13.8 208 Kirwin 9550 23.4 9.7 241 25.7 11.7 220 Little Warm 9370 19.4 10.2 190 25.2 13.0 194 Owl Creek 8975 10.7 5.7 188 13.4 6.2 216 South Pass 9040 32.0 15.6 205 28.9 17.7 163 St. Lawrence Alt 8620 10.3 6.9 149 17.4 9.2 189 Togwotee Pass 9580 34.1 22.6 151 39.2 24.5 160 Townsend Creek 8700 18.9 9.9 191 23.6 12.4 190 ----- ----- Basin Index (%) 196 188 BIGHORN BASIN Bald Mtn. 9380 20.6 19.3 107 17.6 17.3 102 Bear Trap Meadow 8200 5.8 4.7 123 9.6 8.8 109 Bone Springs Div 9350 20.6 17.0 121 18.4 15.8 116 Grave Springs 8550 7.8 9.5 82 8.7 11.0 79 Kirwin 9550 23.4 9.7 241 25.7 11.7 220 Marquette 8760 14.6 -M * 18.2 -M * Middle Powder 7760 9.1 12.3 74 8.5 12.0 71 Owl Creek 8975 10.7 5.7 188 13.4 6.2 216 Powder River Pass 9480 9.7 10.3 94 14.0 12.9 109 Shell Creek 9580 18.5 15.5 119 15.5 14.0 111 Timber Creek 7950 8.2 5.1 161 11.9 7.6 157 ----- ----- Basin Index (%) 123 122 SHOSHONE RIVER Blackwater 9780 38.4 23.1 166 42.6 20.8 205 Evening Star 9200 38.6 24.1 160 45.2 27.6 164 Marquette 8760 14.6 -M * 18.2 -M * Sylvan Road 7120 6.2 10.4 60 31.0 16.8 185 Younts Peak 8350 26.2 14.5 181 31.5 15.9 198 ----- ----- Basin Index (%) 152 185 POWDER RIVER Bear Trap Meadow 8200 5.8 4.7 123 9.6 8.8 109 Cloud Peak Reservoir 9860 18.0 15.2 118 19.9 13.7 145 Grave Springs 8550 7.8 9.5 82 8.7 11.0 79 Hansen Sawmill 8360 12.2 6.1 200 15.2 8.8 173 Middle Powder 7760 9.1 12.3 74 8.5 12.0 71 Powder River Pass 9480 9.7 10.3 94 14.0 12.9 109 Soldier Park 8720 16.3 -M * 15.5 -M * ----- ----- Basin Index (%) 108 113 TONGUE RIVER Big Goose 7990 12.6 9.9 127 15.1 11.9 127 Bone Springs Div 9350 20.6 17.0 121 18.4 15.8 116 Burgess Junction 7880 11.4 12.2 93 12.8 12.7 101 Dome Lake 8880 17.2 11.9 145 17.6 14.0 126 Little Goose 8870 15.2 -M * 18.6 -M * Sucker Creek 8880 14.3 12.5 114 14.9 14.8 101 Tie Creek 6870 3.8 5.3 72 14.5 12.1 120 ----- ----- Basin Index (%) 116 115 BELLE FOURCHE Cole Canyon 5910 .3 4.3 7 7.6 9.7 78 ----- ----- Basin Index (%) 7 78 CHEYENNE RIVER BASIN Blind Park 6890 .0 6.4 0 9.6 12.2 79 North Rapid Creek 6130 .1 6.2 2 8.1 10.2 79 ----- ----- Basin Index (%) 1 79 UPPER N. PLATTE Arapaho Ridge 10960 25.4 21.3 119 26.4 23.2 114 Blackhall Mtn 9820 36.3 -M * 38.0 -M * Columbine 9160 17.1 23.0 74 27.3 25.9 105 Divide Peak 8880 15.9 20.3 78 23.2 21.8 106 Joe Wright 10120 18.6 21.8 85 28.7 26.2 110 Laprele Creek 8375 10.8 9.4 115 12.6 12.8 98 Med Bow 10500 39.4 -M * 35.7 -M * North French Creek 10130 25.4 30.7 83 27.8 27.2 102 Never Summer 10280 21.7 20.5 106 19.5 -M * Old Battle 10000 36.7 31.9 115 38.7 35.5 109 Rawah 9020 9.1 10.4 88 17.3 14.8 117 Sage Creek Basin 7850 5.8 10.8 54 16.9 14.9 113 Sand Lake 10050 31.0 29.8 104 28.1 25.2 112 South Brush Creek 8440 2.7 11.6 23 12.6 15.6 81 Tower 10500 39.0 46.9 83 44.0 40.3 109 Webber Springs 9250 26.3 23.3 113 33.8 27.1 125 Willow Creek Pass 9540 17.8 12.5 142 18.6 13.7 136 Zirkel 9340 31.0 25.5 122 42.4 29.0 146 ----- ----- Basin Index (%) 96 113 SWEETWATER Deer Park 9700 33.5 16.1 208 38.6 20.4 189 Larsen Creek 9000 16.7 11.2 149 23.4 -M * South Pass 9040 32.0 15.6 205 28.9 17.7 163 ----- ----- Basin Index (%) 192 177 LOWER N. PLATTE Casper Mtn. 7900 11.6 14.5 80 13.5 15.4 88 Laprele Creek 8375 10.8 9.4 115 12.6 12.8 98 Reno Hill 8400 13.1 14.2 92 15.1 15.9 95 Windy Peak 7900 8.1 7.6 107 11.8 10.8 109 ----- ----- Basin Index (%) 95 97 LARAMIE RIVER Brooklyn Lake 10240 23.0 22.3 103 23.4 21.5 109 Cinnabar Park 9574 17.8 21.4 83 22.6 24.6 92 Crow Creek 8330 .0 6.3 0 9.3 11.3 82 Deadman Hill 10220 21.5 16.5 130 20.9 17.7 118 Rawah 9020 9.1 10.4 88 17.3 14.8 117 Roach 9700 16.9 16.6 102 21.6 19.6 110 ----- ----- Basin Index (%) 94 105 S. PLATTE Black Mountain 8920 11.2 -M * 13.3 -M * Crow Creek 8330 .0 6.3 0 9.3 11.3 82 Deadman Hill 10220 21.5 16.5 130 20.9 17.7 118 ----- ----- Basin Index (%) 94 104 LITTLE SNAKE RIVER Battle Mountain 7440 -M 8.4 * 17.0 15.2 112 Divide Peak 8880 15.9 20.3 78 23.2 21.8 106 Elk River 8700 13.0 18.4 71 20.6 20.4 101 Little Snake River 8915 26.2 26.0 101 39.0 30.5 128 Old Battle 10000 36.7 31.9 115 38.7 35.5 109 Sage Creek Basin 7850 5.8 10.8 54 16.9 14.9 113 Sandstone RS 8150 5.8 12.6 46 16.3 18.6 88 Whiskey Park 8950 24.9 27.6 90 30.5 28.3 108 ----- ----- Basin Index (%) 87 109 UPPER GREEN RIVER Big Sandy Opening 9080 21.6 12.9 167 23.4 13.5 173 Blind Bull Sum 8650 43.8 23.5 186 -M 19.6 * East Rim Divide 7930 15.7 10.2 154 21.3 11.8 181 Elkhart Park G.S. 9400 20.0 12.3 163 24.7 13.5 183 Gros Ventre Summit 8750 -M 12.8 * -M 13.1 * Gunsight Pass 9820 23.9 13.8 173 25.7 14.1 182 Kendall R.S. 7740 19.8 10.9 182 29.5 14.3 206 Loomis Park 8240 27.1 13.7 198 32.5 17.4 187 New Fork Lake 8340 15.7 10.1 155 18.1 10.9 166 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.8 12.2 154 27.8 14.3 194 Spring Creek Divide 9000 41.8 22.7 184 41.1 23.9 172 Triple Peak 8500 36.5 21.0 174 41.4 25.5 162 ----- ----- Basin Index (%) 174 179 LOWER GREEN RIVER Blacks Fork Jct 8869 9.6 -M * 16.5 -M * Buck Pasture 9632 18.1 -M * 24.2 -M * EF Blacks Fork GS 9360 15.2 -M * 17.8 -M * Hams Fork 7840 14.6 9.7 151 21.8 11.5 190 Hewinta 9500 9.9 10.6 93 17.9 14.4 124 Hickerson Park 9122 9.0 7.7 117 13.3 10.5 127 Hole-in-Rock 9168 7.9 7.1 111 13.9 10.0 139 Indian Creek 9425 41.5 24.8 167 41.7 22.7 184 Kelley R.S. 8180 25.9 14.3 181 31.2 18.2 171 Spirit Lk 10235 17.3 -M * 19.2 -M * Steel Creek Park 10158 19.7 16.0 123 21.9 16.9 130 ----- ----- Basin Index (%) 142 155 UPPER BEAR RIVER Bear River RS 8777 9.4 -M * 19.1 -M * Bug Lake 7987 32.9 19.0 173 34.8 19.6 178 Burts Miller Ranch 8000 2.6 -M * 10.5 -M * Chalk Creek #1 9171 34.2 24.7 138 37.2 25.6 145 Hayden Fork 9130 21.2 14.9 142 30.3 21.4 142 Kelley R.S. 8180 25.9 14.3 181 31.2 18.2 171 Lily Lake 9133 14.0 12.7 110 20.5 17.5 117 Monte Cristo 8932 37.4 27.9 134 40.4 26.3 154 Salt River Summit 7760 20.1 12.3 163 -M 16.8 * ----- ----- Basin Index (%) 148 151 ----------------------------------------------------------------------------- -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.