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 MONDAY: APRIL 10 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.5 14.9 164 40.0 21.0 190 Black Bear 8170 46.6 36.8 127 54.0 38.2 141 Blind Bull Sum 8650 43.5 23.5 185 -M 19.5 * Cottonwood Creek 7670 28.5 20.8 137 39.0 24.7 158 East Rim Divide 7930 15.5 10.2 152 21.1 11.8 179 Grand Targhee 9260 47.3 39.3 120 39.6 31.1 127 Granite Creek 6770 25.7 13.9 185 36.2 19.7 184 Grassy Lake 7265 37.3 31.4 119 55.3 35.9 154 Gros Ventre Summit 8750 -M 12.8 * -M 13.0 * Gunsight Pass 9820 23.9 13.9 172 25.6 14.1 182 Lewis Lake Divide 7850 46.3 30.1 154 55.7 35.4 157 Phillips Bench 8200 38.5 25.7 150 47.1 28.2 167 Salt River Summit 7760 19.9 12.5 159 -M 16.7 * Snake River Station 6920 18.4 14.4 128 36.0 22.5 160 Spring Creek Divide 9000 41.8 22.7 184 41.1 23.8 173 Thumb Divide 7980 22.5 14.7 153 28.2 18.7 151 Togwotee Pass 9580 34.1 22.5 152 39.2 24.4 161 Two Ocean Plateau 9240 -M 26.4 * -M 27.3 * Willow Creek 8380 29.5 28.1 105 50.6 33.7 150 Younts Peak 8350 25.9 14.5 179 31.2 15.8 197 ----- ----- Basin Index (%) 146 160 MADISON-GALLATIN Black Bear 8170 46.6 36.8 127 54.0 38.2 141 Canyon 7870 18.0 12.4 145 26.0 16.2 160 Madison Plateau 7750 27.6 21.9 126 36.4 26.3 138 West Yellowstone 6700 6.6 8.9 74 23.4 14.2 165 Whiskey Creek 6800 13.2 14.7 90 27.0 20.2 134 ----- ----- Basin Index (%) 118 145 YELLOWSTONE Beartooth Lake 9360 32.8 21.6 152 27.9 19.8 141 Burnt Mtn 5880 .2 3.5 6 15.0 13.2 114 Canyon 7870 18.0 12.4 145 26.0 16.2 160 Cole Creek 7850 12.6 15.1 83 9.4 13.2 71 Evening Star 9200 38.3 24.0 160 45.0 27.4 164 Fisher Creek 9100 43.3 31.4 138 47.2 31.7 149 Northeast Entrance 7350 7.8 8.7 90 20.7 12.3 168 Parker Peak 9400 35.9 19.9 180 34.7 17.8 195 Sylvan Lake 8420 24.5 19.6 125 37.8 22.3 170 Thumb Divide 7980 22.5 14.7 153 28.2 18.7 151 Two Ocean Plateau 9240 -M 26.4 * -M 27.3 * White Mill 8700 36.5 22.7 161 36.0 23.7 152 Wolverine 7650 4.3 9.5 45 21.0 12.2 172 ----- ----- Basin Index (%) 136 153 WIND RIVER Burroughs Creek 8750 23.3 -M * 27.6 -M * Castle Creek 8400 10.9 -M * 15.5 -M * Cold Springs 9630 17.6 6.3 279 20.1 10.1 199 Deer Park 9700 33.5 16.1 208 38.5 20.3 190 Hobbs Park 10100 30.0 14.5 207 28.5 13.7 208 Kirwin 9550 23.2 9.7 239 25.6 11.7 219 Little Warm 9370 -M 10.3 * 25.1 13.0 193 Owl Creek 8975 10.6 5.8 183 13.4 6.2 216 South Pass 9040 32.0 15.6 205 28.9 17.6 164 St. Lawrence Alt 8620 10.1 6.9 146 17.3 9.1 190 Togwotee Pass 9580 34.1 22.5 152 39.2 24.4 161 Townsend Creek 8700 18.8 9.8 192 23.4 12.3 190 ----- ----- Basin Index (%) 196 188 BIGHORN BASIN Bald Mtn. 9380 20.6 19.3 107 17.4 17.2 101 Bear Trap Meadow 8200 5.8 4.7 123 9.4 8.7 108 Bone Springs Div 9350 20.6 17.0 121 18.1 15.7 115 Grave Springs 8550 7.8 9.5 82 8.7 10.8 81 Kirwin 9550 23.2 9.7 239 25.6 11.7 219 Marquette 8760 14.5 -M * 18.0 -M * Middle Powder 7760 9.1 12.3 74 8.2 11.9 69 Owl Creek 8975 10.6 5.8 183 13.4 6.2 216 Powder River Pass 9480 9.7 10.3 94 13.8 12.8 108 Shell Creek 9580 18.4 15.4 119 15.2 13.9 109 Timber Creek 7950 8.2 5.1 161 11.9 7.5 159 ----- ----- Basin Index (%) 123 122 SHOSHONE RIVER Blackwater 9780 38.3 23.0 167 42.4 20.6 206 Evening Star 9200 38.3 24.0 160 45.0 27.4 164 Marquette 8760 14.5 -M * 18.0 -M * Sylvan Road 7120 6.4 10.5 61 31.0 16.7 186 Younts Peak 8350 25.9 14.5 179 31.2 15.8 197 ----- ----- Basin Index (%) 151 186 POWDER RIVER Bear Trap Meadow 8200 5.8 4.7 123 9.4 8.7 108 Cloud Peak Reservoir 9860 18.0 15.1 119 18.6 13.6 137 Grave Springs 8550 7.8 9.5 82 8.7 10.8 81 Hansen Sawmill 8360 12.3 6.1 202 15.3 8.7 176 Middle Powder 7760 9.1 12.3 74 8.2 11.9 69 Powder River Pass 9480 9.7 10.3 94 13.8 12.8 108 Soldier Park 8720 16.2 -M * 15.5 -M * ----- ----- Basin Index (%) 108 111 TONGUE RIVER Big Goose 7990 12.6 9.8 129 14.8 11.8 125 Bone Springs Div 9350 20.6 17.0 121 18.1 15.7 115 Burgess Junction 7880 11.4 12.1 94 12.6 12.5 101 Dome Lake 8880 17.0 11.9 143 17.4 13.9 125 Little Goose 8870 15.2 -M * 18.6 -M * Sucker Creek 8880 14.3 12.4 115 14.7 14.7 100 Tie Creek 6870 3.8 5.5 69 14.4 12.0 120 ----- ----- Basin Index (%) 116 114 BELLE FOURCHE Cole Canyon 5910 .3 4.5 7 7.5 9.7 77 ----- ----- Basin Index (%) 7 77 CHEYENNE RIVER BASIN Blind Park 6890 .0 6.6 0 9.7 12.1 80 North Rapid Creek 6130 .3 6.3 5 8.1 10.1 80 ----- ----- Basin Index (%) 2 80 UPPER N. PLATTE Arapaho Ridge 10960 25.4 21.2 120 26.4 22.9 115 Blackhall Mtn 9820 36.1 -M * 38.1 -M * Columbine 9160 16.7 23.2 72 27.2 25.8 105 Divide Peak 8880 15.7 20.2 78 23.0 21.7 106 Joe Wright 10120 18.3 21.7 84 28.7 26.1 110 Laprele Creek 8375 10.3 9.4 110 12.5 12.7 98 Med Bow 10500 39.4 -M * 35.7 -M * North French Creek 10130 25.2 30.3 83 27.9 27.0 103 Never Summer 10280 21.5 20.4 105 19.5 -M * Old Battle 10000 36.7 31.8 115 38.5 35.3 109 Rawah 9020 8.8 10.5 84 17.2 14.7 117 Sage Creek Basin 7850 5.3 11.1 48 16.9 14.8 114 Sand Lake 10050 30.9 29.6 104 27.8 25.1 111 South Brush Creek 8440 2.6 11.7 22 12.4 15.5 80 Tower 10500 39.0 46.6 84 43.8 40.2 109 Webber Springs 9250 25.9 23.3 111 33.7 27.0 125 Willow Creek Pass 9540 18.0 12.4 145 18.6 13.6 137 Zirkel 9340 30.8 25.8 119 42.5 28.8 148 ----- ----- Basin Index (%) 95 113 SWEETWATER Deer Park 9700 33.5 16.1 208 38.5 20.3 190 Larsen Creek 9000 16.4 11.3 145 23.4 -M * South Pass 9040 32.0 15.6 205 28.9 17.6 164 ----- ----- Basin Index (%) 190 178 LOWER N. PLATTE Casper Mtn. 7900 11.4 14.5 79 13.4 15.3 88 Laprele Creek 8375 10.3 9.4 110 12.5 12.7 98 Reno Hill 8400 13.0 14.1 92 14.8 15.7 94 Windy Peak 7900 7.8 7.6 103 11.7 10.7 109 ----- ----- Basin Index (%) 93 96 LARAMIE RIVER Brooklyn Lake 10240 22.8 22.2 103 23.1 21.4 108 Cinnabar Park 9574 17.0 21.4 79 22.6 24.5 92 Crow Creek 8330 .0 6.6 0 -M 11.2 * Deadman Hill 10220 21.3 16.4 130 20.9 17.6 119 Rawah 9020 8.8 10.5 84 17.2 14.7 117 Roach 9700 16.6 16.6 100 21.6 19.4 111 ----- ----- Basin Index (%) 92 108 S. PLATTE Black Mountain 8920 10.7 -M * 13.2 -M * Crow Creek 8330 .0 6.6 0 -M 11.2 * Deadman Hill 10220 21.3 16.4 130 20.9 17.6 119 ----- ----- Basin Index (%) 93 119* LITTLE SNAKE RIVER Battle Mountain 7440 -M 8.7 * 16.9 15.2 111 Divide Peak 8880 15.7 20.2 78 23.0 21.7 106 Elk River 8700 11.8 18.7 63 20.6 20.3 101 Little Snake River 8915 26.1 26.0 100 39.0 30.1 130 Old Battle 10000 36.7 31.8 115 38.5 35.3 109 Sage Creek Basin 7850 5.3 11.1 48 16.9 14.8 114 Sandstone RS 8150 5.8 12.6 46 16.0 18.6 86 Whiskey Park 8950 24.9 27.6 90 30.5 28.2 108 ----- ----- Basin Index (%) 85 109 UPPER GREEN RIVER Big Sandy Opening 9080 21.3 12.8 166 23.3 13.4 174 Blind Bull Sum 8650 43.5 23.5 185 -M 19.5 * East Rim Divide 7930 15.5 10.2 152 21.1 11.8 179 Elkhart Park G.S. 9400 19.8 12.3 161 24.7 13.4 184 Gros Ventre Summit 8750 -M 12.8 * -M 13.0 * Gunsight Pass 9820 23.9 13.9 172 25.6 14.1 182 Kendall R.S. 7740 20.0 11.1 180 29.3 14.2 206 Loomis Park 8240 27.0 13.8 196 32.4 17.3 187 New Fork Lake 8340 15.6 10.2 153 17.9 10.8 166 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.7 12.3 152 27.7 14.2 195 Spring Creek Divide 9000 41.8 22.7 184 41.1 23.8 173 Triple Peak 8500 36.3 21.3 170 41.4 25.3 164 ----- ----- Basin Index (%) 173 180 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 16.4 -M * Buck Pasture 9632 17.7 -M * 24.3 -M * EF Blacks Fork GS 9360 14.6 -M * 17.7 -M * Hams Fork 7840 13.9 10.0 139 21.7 11.5 189 Hewinta 9500 9.2 10.7 86 17.7 14.3 124 Hickerson Park 9122 9.1 7.8 117 13.1 10.4 126 Hole-in-Rock 9168 7.5 7.1 106 13.6 9.9 137 Indian Creek 9425 41.2 24.8 166 41.6 22.6 184 Kelley R.S. 8180 25.8 14.4 179 31.1 18.2 171 Spirit Lk 10235 17.0 -M * 19.2 -M * Steel Creek Park 10158 19.7 16.0 123 21.9 16.8 130 ----- ----- Basin Index (%) 139 155 UPPER BEAR RIVER Bear River RS 8777 9.3 -M * 19.1 -M * Bug Lake 7987 32.8 18.9 174 34.8 19.5 178 Burts Miller Ranch 8000 2.4 -M * 10.4 -M * Chalk Creek #1 9171 34.2 24.6 139 37.2 25.5 146 Hayden Fork 9130 20.0 15.1 132 30.5 21.3 143 Kelley R.S. 8180 25.8 14.4 179 31.1 18.2 171 Lily Lake 9133 13.8 12.8 108 20.5 17.4 118 Monte Cristo 8932 37.4 27.9 134 40.4 26.2 154 Salt River Summit 7760 19.9 12.5 159 -M 16.7 * ----- ----- Basin Index (%) 146 152 ----------------------------------------------------------------------------- -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.