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 4 , 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 15.0 162 39.1 20.4 192 Black Bear 8170 44.9 37.0 121 52.5 37.3 141 Blind Bull Sum 8650 42.2 23.0 183 -M 19.1 * Cottonwood Creek 7670 27.0 21.2 127 36.9 24.1 153 East Rim Divide 7930 16.1 10.2 158 20.6 11.5 179 Grand Targhee 9260 44.3 37.6 118 39.2 30.2 130 Granite Creek 6770 26.5 14.7 180 35.5 19.3 184 Grassy Lake 7265 36.3 31.6 115 53.9 35.2 153 Gros Ventre Summit 8750 -M 13.0 * -M 12.6 * Gunsight Pass 9820 22.5 13.6 165 24.3 13.4 181 Lewis Lake Divide 7850 44.8 29.6 151 54.6 34.6 158 Phillips Bench 8200 36.7 24.7 149 45.7 27.5 166 Salt River Summit 7760 19.3 13.0 148 28.2 16.3 173 Snake River Station 6920 18.6 15.1 123 35.3 21.9 161 Spring Creek Divide 9000 39.8 22.5 177 39.4 23.3 169 Thumb Divide 7980 22.5 14.7 153 27.6 18.1 152 Togwotee Pass 9580 33.0 21.8 151 37.7 23.7 159 Two Ocean Plateau 9240 -M 25.7 * -M 26.5 * Willow Creek 8380 28.1 28.2 100 47.8 32.8 146 Younts Peak 8350 25.3 14.2 178 30.6 15.4 199 ----- ----- Basin Index (%) 142 160 MADISON-GALLATIN Black Bear 8170 44.9 37.0 121 52.5 37.3 141 Canyon 7870 17.6 12.4 142 25.3 15.8 160 Madison Plateau 7750 26.5 21.4 124 35.3 25.6 138 West Yellowstone 6700 7.4 10.0 74 22.6 13.8 164 Whiskey Creek 6800 13.3 15.0 89 26.2 19.6 134 ----- ----- Basin Index (%) 115 144 YELLOWSTONE Beartooth Lake 9360 32.3 21.2 152 27.4 19.2 143 Burnt Mtn 5880 .0 4.6 0 14.7 12.6 117 Canyon 7870 17.6 12.4 142 25.3 15.8 160 Cole Creek 7850 12.3 14.1 87 8.8 12.4 71 Evening Star 9200 37.9 23.8 159 44.3 26.5 167 Fisher Creek 9100 42.7 30.8 139 46.2 30.8 150 Northeast Entrance 7350 8.8 9.2 96 20.1 11.9 169 Parker Peak 9400 34.2 19.1 179 33.7 17.1 197 Sylvan Lake 8420 23.7 19.3 123 36.9 21.7 170 Thumb Divide 7980 22.5 14.7 153 27.6 18.1 152 Two Ocean Plateau 9240 -M 25.7 * -M 26.5 * White Mill 8700 35.2 21.9 161 35.3 23.1 153 Wolverine 7650 6.3 9.4 67 20.6 11.9 173 ----- ----- Basin Index (%) 136 154 WIND RIVER Burroughs Creek 8750 23.2 -M * 27.1 -M * Castle Creek 8400 11.0 -M * 15.3 -M * Cold Springs 9630 17.2 7.0 246 19.6 9.7 202 Deer Park 9700 32.5 15.1 215 37.6 19.3 195 Hobbs Park 10100 29.2 13.8 212 27.4 13.0 211 Kirwin 9550 23.1 9.5 243 25.0 11.2 223 Little Warm 9370 18.5 10.2 181 24.1 12.5 193 Owl Creek 8975 10.3 5.7 181 12.4 5.9 210 South Pass 9040 31.2 15.1 207 28.4 17.0 167 St. Lawrence Alt 8620 10.5 6.8 154 17.0 8.7 195 Togwotee Pass 9580 33.0 21.8 151 37.7 23.7 159 Townsend Creek 8700 18.5 9.3 199 22.6 11.7 193 ----- ----- Basin Index (%) 196 190 BIGHORN BASIN Bald Mtn. 9380 19.4 18.9 103 16.6 16.5 101 Bear Trap Meadow 8200 5.2 5.1 102 8.5 8.2 104 Bone Springs Div 9350 19.9 16.4 121 17.7 15.1 117 Grave Springs 8550 7.0 9.1 77 7.6 10.2 75 Kirwin 9550 23.1 9.5 243 25.0 11.2 223 Marquette 8760 14.0 -M * 17.5 -M * Middle Powder 7760 7.4 11.7 63 7.2 11.3 64 Owl Creek 8975 10.3 5.7 181 12.4 5.9 210 Powder River Pass 9480 9.1 10.1 90 13.0 12.2 107 Shell Creek 9580 17.3 14.8 117 14.2 13.4 106 Timber Creek 7950 8.4 4.9 171 11.6 7.2 161 ----- ----- Basin Index (%) 120 120 SHOSHONE RIVER Blackwater 9780 37.6 22.3 169 41.7 20.0 208 Evening Star 9200 37.9 23.8 159 44.3 26.5 167 Marquette 8760 14.0 -M * 17.5 -M * Sylvan Road 7120 8.6 11.0 78 30.4 16.3 187 Younts Peak 8350 25.3 14.2 178 30.6 15.4 199 ----- ----- Basin Index (%) 153 188 POWDER RIVER Bear Trap Meadow 8200 5.2 5.1 102 8.5 8.2 104 Cloud Peak Reservoir 9860 16.4 14.4 114 17.9 12.9 139 Grave Springs 8550 7.0 9.1 77 7.6 10.2 75 Hansen Sawmill 8360 11.6 6.2 187 14.1 8.3 170 Middle Powder 7760 7.4 11.7 63 7.2 11.3 64 Powder River Pass 9480 9.1 10.1 90 13.0 12.2 107 Soldier Park 8720 15.3 -M * 14.0 -M * ----- ----- Basin Index (%) 100 108 TONGUE RIVER Big Goose 7990 12.2 9.3 131 13.9 11.1 125 Bone Springs Div 9350 19.9 16.4 121 17.7 15.1 117 Burgess Junction 7880 10.8 11.6 93 11.7 12.0 98 Dome Lake 8880 16.6 11.6 143 16.6 13.2 126 Little Goose 8870 14.0 -M * 17.2 -M * Sucker Creek 8880 13.7 11.8 116 13.8 14.0 99 Tie Creek 6870 4.6 5.5 84 13.8 11.3 122 ----- ----- Basin Index (%) 118 114 BELLE FOURCHE Cole Canyon 5910 .1 5.6 2 7.0 9.1 77 ----- ----- Basin Index (%) 2 77 CHEYENNE RIVER BASIN Blind Park 6890 .3 7.1 4 9.0 11.5 78 North Rapid Creek 6130 .4 6.7 6 7.5 9.5 79 ----- ----- Basin Index (%) 5 79 UPPER N. PLATTE Arapaho Ridge 10960 24.6 20.4 121 25.2 21.8 116 Blackhall Mtn 9820 35.5 -M * 36.7 -M * Columbine 9160 18.6 23.3 80 26.8 25.0 107 Divide Peak 8880 15.5 19.7 79 21.9 21.0 104 Joe Wright 10120 17.7 20.6 86 27.5 25.2 109 Laprele Creek 8375 11.0 9.4 117 12.1 12.2 99 Med Bow 10500 37.7 -M * 34.4 -M * North French Creek 10130 24.1 28.7 84 26.8 26.1 103 Never Summer 10280 21.2 20.0 106 18.4 -M * Old Battle 10000 35.8 30.7 117 37.5 34.2 110 Rawah 9020 9.3 10.4 89 16.4 13.8 119 Sage Creek Basin 7850 6.7 12.5 54 16.1 14.2 113 Sand Lake 10050 30.0 28.3 106 26.8 24.2 111 South Brush Creek 8440 4.8 12.1 40 11.9 14.9 80 Tower 10500 39.3 45.1 87 42.7 38.9 110 Webber Springs 9250 25.6 23.0 111 32.7 26.1 125 Willow Creek Pass 9540 17.2 12.0 143 17.9 13.1 137 Zirkel 9340 31.9 26.3 121 41.2 27.8 148 ----- ----- Basin Index (%) 97 113 SWEETWATER Deer Park 9700 32.5 15.1 215 37.6 19.3 195 Larsen Creek 9000 17.3 11.9 145 22.9 -M * South Pass 9040 31.2 15.1 207 28.4 17.0 167 ----- ----- Basin Index (%) 192 182 LOWER N. PLATTE Casper Mtn. 7900 11.1 14.0 79 12.4 14.4 86 Laprele Creek 8375 11.0 9.4 117 12.1 12.2 99 Reno Hill 8400 12.5 13.7 91 13.6 14.9 91 Windy Peak 7900 8.6 7.8 110 11.3 10.2 111 ----- ----- Basin Index (%) 96 96 LARAMIE RIVER Brooklyn Lake 10240 22.7 21.0 108 22.6 20.6 110 Cinnabar Park 9574 17.9 20.6 87 21.9 23.6 93 Crow Creek 8330 .2 7.0 3 9.2 10.5 88 Deadman Hill 10220 20.3 15.9 128 19.8 16.9 117 Rawah 9020 9.3 10.4 89 16.4 13.8 119 Roach 9700 16.3 16.1 101 20.4 18.8 109 ----- ----- Basin Index (%) 95 106 S. PLATTE Black Mountain 8920 10.7 -M * 12.5 -M * Crow Creek 8330 .2 7.0 3 9.2 10.5 88 Deadman Hill 10220 20.3 15.9 128 19.8 16.9 117 ----- ----- Basin Index (%) 90 106 LITTLE SNAKE RIVER Battle Mountain 7440 -M 10.2 * 16.5 14.7 112 Divide Peak 8880 15.5 19.7 79 21.9 21.0 104 Elk River 8700 13.4 19.1 70 19.9 19.6 102 Little Snake River 8915 26.9 24.2 111 38.0 29.1 131 Old Battle 10000 35.8 30.7 117 37.5 34.2 110 Sage Creek Basin 7850 6.7 12.5 54 16.1 14.2 113 Sandstone RS 8150 7.0 12.9 54 15.8 18.0 88 Whiskey Park 8950 25.4 26.8 95 29.5 27.3 108 ----- ----- Basin Index (%) 90 110 UPPER GREEN RIVER Big Sandy Opening 9080 20.7 12.4 167 23.0 12.9 178 Blind Bull Sum 8650 42.2 23.0 183 -M 19.1 * East Rim Divide 7930 16.1 10.2 158 20.6 11.5 179 Elkhart Park G.S. 9400 18.8 12.2 154 23.9 13.0 184 Gros Ventre Summit 8750 -M 13.0 * -M 12.6 * Gunsight Pass 9820 22.5 13.6 165 24.3 13.4 181 Kendall R.S. 7740 20.5 11.5 178 28.7 13.9 206 Loomis Park 8240 26.5 14.0 189 31.8 16.9 188 New Fork Lake 8340 15.9 10.3 154 17.5 10.5 167 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.4 12.3 150 26.9 13.9 194 Spring Creek Divide 9000 39.8 22.5 177 39.4 23.3 169 Triple Peak 8500 35.3 21.9 161 40.1 24.8 162 ----- ----- Basin Index (%) 169 179 LOWER GREEN RIVER Blacks Fork Jct 8869 9.6 -M * 16.0 -M * Buck Pasture 9632 17.9 -M * 23.7 -M * EF Blacks Fork GS 9360 15.5 -M * 17.3 -M * Hams Fork 7840 14.5 10.9 133 21.1 11.1 190 Hewinta 9500 9.4 11.0 85 17.3 13.7 126 Hickerson Park 9122 9.9 7.7 129 13.1 10.0 131 Hole-in-Rock 9168 7.9 6.9 114 13.6 9.4 145 Indian Creek 9425 39.4 24.3 162 -M 22.1 * Kelley R.S. 8180 25.1 15.0 167 30.0 17.7 169 Spirit Lk 10235 16.7 -M * 18.8 -M * Steel Creek Park 10158 19.1 15.6 122 21.2 16.1 132 ----- ----- Basin Index (%) 137 149 UPPER BEAR RIVER Bear River RS 8777 10.2 -M * 18.5 -M * Bug Lake 7987 31.8 18.2 175 33.6 19.0 177 Burts Miller Ranch 8000 3.5 -M * 10.0 -M * Chalk Creek #1 9171 33.5 23.9 140 36.1 24.7 146 Hayden Fork 9130 21.2 15.3 139 29.7 20.6 144 Kelley R.S. 8180 25.1 15.0 167 30.0 17.7 169 Lily Lake 9133 14.2 12.4 115 20.0 16.7 120 Monte Cristo 8932 35.9 27.2 132 38.7 25.4 152 Salt River Summit 7760 19.3 13.0 148 28.2 16.3 173 ----- ----- Basin Index (%) 145 154 ----------------------------------------------------------------------------- -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.