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 THURSDAY: APRIL 6 , 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 15.2 162 39.2 20.5 191 Black Bear 8170 45.1 37.2 121 52.6 37.6 140 Blind Bull Sum 8650 42.4 23.1 184 -M 19.2 * Cottonwood Creek 7670 27.3 21.0 130 37.1 24.3 153 East Rim Divide 7930 15.9 10.2 156 20.8 11.6 179 Grand Targhee 9260 44.3 38.2 116 39.4 30.4 130 Granite Creek 6770 26.5 14.6 182 35.7 19.4 184 Grassy Lake 7265 36.3 31.5 115 53.8 35.3 152 Gros Ventre Summit 8750 19.6 12.9 152 23.9 12.7 188 Gunsight Pass 9820 22.3 13.7 163 24.3 13.6 179 Lewis Lake Divide 7850 45.0 29.8 151 54.6 34.8 157 Phillips Bench 8200 37.1 25.2 147 45.8 27.7 165 Salt River Summit 7760 19.3 12.9 150 28.3 16.4 173 Snake River Station 6920 18.9 14.9 127 35.2 22.1 159 Spring Creek Divide 9000 40.0 22.5 178 39.6 23.5 169 Thumb Divide 7980 22.6 14.7 154 27.6 18.3 151 Togwotee Pass 9580 33.1 22.0 150 38.0 23.9 159 Two Ocean Plateau 9240 -M 25.9 * -M 26.6 * Willow Creek 8380 27.6 28.4 97 48.0 33.0 145 Younts Peak 8350 25.3 14.3 177 30.9 15.5 199 ----- ----- Basin Index (%) 142 160 MADISON-GALLATIN Black Bear 8170 45.1 37.2 121 52.6 37.6 140 Canyon 7870 17.6 12.5 141 25.5 16.0 159 Madison Plateau 7750 26.4 21.4 123 35.4 25.9 137 West Yellowstone 6700 7.2 9.7 74 22.6 14.0 161 Whiskey Creek 6800 13.3 14.9 89 26.4 19.8 133 ----- ----- Basin Index (%) 115 143 YELLOWSTONE Beartooth Lake 9360 32.5 21.2 153 27.6 19.4 142 Burnt Mtn 5880 .4 4.6 9 14.8 12.8 116 Canyon 7870 17.6 12.5 141 25.5 16.0 159 Cole Creek 7850 12.2 14.4 85 9.0 12.7 71 Evening Star 9200 37.8 23.7 159 44.4 26.8 166 Fisher Creek 9100 42.6 31.1 137 46.2 31.1 149 Northeast Entrance 7350 8.6 9.1 95 20.2 12.0 168 Parker Peak 9400 34.5 19.3 179 33.9 17.3 196 Sylvan Lake 8420 23.7 19.3 123 36.9 21.8 169 Thumb Divide 7980 22.6 14.7 154 27.6 18.3 151 Two Ocean Plateau 9240 -M 25.9 * -M 26.6 * White Mill 8700 35.4 22.1 160 35.5 23.2 153 Wolverine 7650 6.0 9.5 63 20.8 12.0 173 ----- ----- Basin Index (%) 136 153 WIND RIVER Burroughs Creek 8750 23.5 -M * 27.4 -M * Castle Creek 8400 11.2 -M * 15.4 -M * Cold Springs 9630 17.3 6.8 254 19.8 9.8 202 Deer Park 9700 32.6 15.4 212 37.7 19.6 192 Hobbs Park 10100 29.6 14.0 211 27.7 13.2 210 Kirwin 9550 23.3 9.6 243 25.3 11.4 222 Little Warm 9370 18.6 10.2 182 24.3 12.6 193 Owl Creek 8975 10.4 5.8 179 12.6 5.9 214 South Pass 9040 31.3 15.1 207 28.5 17.1 167 St. Lawrence Alt 8620 10.6 6.8 156 17.1 8.9 192 Togwotee Pass 9580 33.1 22.0 150 38.0 23.9 159 Townsend Creek 8700 18.7 9.5 197 22.9 11.9 192 ----- ----- Basin Index (%) 196 189 BIGHORN BASIN Bald Mtn. 9380 19.5 19.0 103 16.9 16.7 101 Bear Trap Meadow 8200 5.3 5.0 106 8.7 8.4 104 Bone Springs Div 9350 20.1 16.7 120 17.9 15.3 117 Grave Springs 8550 6.9 9.3 74 7.9 10.4 76 Kirwin 9550 23.3 9.6 243 25.3 11.4 222 Marquette 8760 14.1 -M * 17.7 -M * Middle Powder 7760 7.4 11.9 62 7.6 11.5 66 Owl Creek 8975 10.4 5.8 179 12.6 5.9 214 Powder River Pass 9480 9.2 10.1 91 13.4 12.4 108 Shell Creek 9580 17.4 15.0 116 14.5 13.6 107 Timber Creek 7950 8.4 4.9 171 11.6 7.2 161 ----- ----- Basin Index (%) 119 121 SHOSHONE RIVER Blackwater 9780 37.7 22.4 168 41.9 20.2 207 Evening Star 9200 37.8 23.7 159 44.4 26.8 166 Marquette 8760 14.1 -M * 17.7 -M * Sylvan Road 7120 8.0 10.8 74 30.3 16.5 184 Younts Peak 8350 25.3 14.3 177 30.9 15.5 199 ----- ----- Basin Index (%) 153 187 POWDER RIVER Bear Trap Meadow 8200 5.3 5.0 106 8.7 8.4 104 Cloud Peak Reservoir 9860 16.6 14.7 113 18.2 13.1 139 Grave Springs 8550 6.9 9.3 74 7.9 10.4 76 Hansen Sawmill 8360 11.8 6.2 190 14.2 8.4 169 Middle Powder 7760 7.4 11.9 62 7.6 11.5 66 Powder River Pass 9480 9.2 10.1 91 13.4 12.4 108 Soldier Park 8720 15.4 -M * 14.1 -M * ----- ----- Basin Index (%) 100 109 TONGUE RIVER Big Goose 7990 12.2 9.5 128 14.1 11.2 126 Bone Springs Div 9350 20.1 16.7 120 17.9 15.3 117 Burgess Junction 7880 10.8 11.8 92 12.0 12.2 98 Dome Lake 8880 16.7 11.7 143 16.7 13.4 125 Little Goose 8870 14.2 -M * 17.3 -M * Sucker Creek 8880 13.8 12.0 115 14.0 14.2 99 Tie Creek 6870 4.7 5.5 85 13.8 11.5 120 ----- ----- Basin Index (%) 117 114 BELLE FOURCHE Cole Canyon 5910 .0 5.3 0 7.1 9.3 76 ----- ----- Basin Index (%) 0 76 CHEYENNE RIVER BASIN Blind Park 6890 .2 7.1 3 9.1 11.8 77 North Rapid Creek 6130 .0 6.6 0 7.6 9.8 78 ----- ----- Basin Index (%) 1 77 UPPER N. PLATTE Arapaho Ridge 10960 25.3 20.7 122 26.0 22.2 117 Blackhall Mtn 9820 36.0 -M * 37.4 -M * Columbine 9160 18.5 23.4 79 27.1 25.2 108 Divide Peak 8880 16.1 19.8 81 22.5 21.2 106 Joe Wright 10120 18.9 21.0 90 28.5 25.5 112 Laprele Creek 8375 11.1 9.4 118 12.5 12.3 102 Med Bow 10500 38.0 -M * 34.8 -M * North French Creek 10130 23.9 29.2 82 27.1 26.4 103 Never Summer 10280 21.9 20.3 108 19.3 -M * Old Battle 10000 36.0 31.1 116 37.8 34.6 109 Rawah 9020 9.7 10.6 92 16.9 14.0 121 Sage Creek Basin 7850 6.8 12.2 56 16.5 14.3 115 Sand Lake 10050 30.4 28.6 106 27.4 24.5 112 South Brush Creek 8440 4.6 12.0 38 12.4 15.0 83 Tower 10500 38.9 45.6 85 43.1 39.4 109 Webber Springs 9250 26.0 23.1 113 33.1 26.4 125 Willow Creek Pass 9540 17.9 12.1 148 18.5 13.3 139 Zirkel 9340 31.9 26.3 121 41.7 28.1 148 ----- ----- Basin Index (%) 98 114 SWEETWATER Deer Park 9700 32.6 15.4 212 37.7 19.6 192 Larsen Creek 9000 17.1 11.7 146 23.0 -M * South Pass 9040 31.3 15.1 207 28.5 17.1 167 ----- ----- Basin Index (%) 192 180 LOWER N. PLATTE Casper Mtn. 7900 11.4 14.3 80 12.8 14.7 87 Laprele Creek 8375 11.1 9.4 118 12.5 12.3 102 Reno Hill 8400 12.7 14.0 91 14.1 15.2 93 Windy Peak 7900 8.7 7.8 112 11.7 10.4 112 ----- ----- Basin Index (%) 96 97 LARAMIE RIVER Brooklyn Lake 10240 22.6 21.5 105 22.9 20.9 110 Cinnabar Park 9574 17.7 21.0 84 22.2 24.0 92 Crow Creek 8330 .3 7.0 4 9.3 10.7 87 Deadman Hill 10220 20.7 16.0 129 20.3 17.1 119 Rawah 9020 9.7 10.6 92 16.9 14.0 121 Roach 9700 16.7 16.4 102 21.1 19.0 111 ----- ----- Basin Index (%) 95 107 S. PLATTE Black Mountain 8920 11.4 -M * 13.0 -M * Crow Creek 8330 .3 7.0 4 9.3 10.7 87 Deadman Hill 10220 20.7 16.0 129 20.3 17.1 119 ----- ----- Basin Index (%) 91 106 LITTLE SNAKE RIVER Battle Mountain 7440 -M 9.8 * 16.6 14.8 112 Divide Peak 8880 16.1 19.8 81 22.5 21.2 106 Elk River 8700 12.7 19.2 66 20.3 19.8 103 Little Snake River 8915 27.0 24.9 108 38.3 29.2 131 Old Battle 10000 36.0 31.1 116 37.8 34.6 109 Sage Creek Basin 7850 6.8 12.2 56 16.5 14.3 115 Sandstone RS 8150 7.0 12.8 55 16.2 18.1 90 Whiskey Park 8950 25.4 27.2 93 29.7 27.6 108 ----- ----- Basin Index (%) 89 110 UPPER GREEN RIVER Big Sandy Opening 9080 20.8 12.5 166 23.1 13.0 178 Blind Bull Sum 8650 42.4 23.1 184 -M 19.2 * East Rim Divide 7930 15.9 10.2 156 20.8 11.6 179 Elkhart Park G.S. 9400 19.0 12.2 156 24.1 13.1 184 Gros Ventre Summit 8750 19.6 12.9 152 23.9 12.7 188 Gunsight Pass 9820 22.3 13.7 163 24.3 13.6 179 Kendall R.S. 7740 20.4 11.5 177 28.8 14.0 206 Loomis Park 8240 26.7 13.8 193 31.9 17.0 188 New Fork Lake 8340 15.6 10.3 151 17.6 10.6 166 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.3 12.3 149 27.0 14.0 193 Spring Creek Divide 9000 40.0 22.5 178 39.6 23.5 169 Triple Peak 8500 35.5 21.9 162 40.1 25.0 160 ----- ----- Basin Index (%) 168 179 LOWER GREEN RIVER Blacks Fork Jct 8869 9.7 -M * 16.0 -M * Buck Pasture 9632 18.0 -M * 23.8 -M * EF Blacks Fork GS 9360 15.7 -M * 17.4 -M * Hams Fork 7840 14.3 10.7 134 21.2 11.2 189 Hewinta 9500 9.8 10.9 90 17.3 13.9 124 Hickerson Park 9122 9.7 7.9 123 13.1 10.1 130 Hole-in-Rock 9168 7.9 7.0 113 13.6 9.7 140 Indian Creek 9425 39.8 24.6 162 -M 22.3 * Kelley R.S. 8180 25.1 14.8 170 30.0 17.8 169 Spirit Lk 10235 16.7 -M * 18.9 -M * Steel Creek Park 10158 19.2 15.7 122 21.3 16.3 131 ----- ----- Basin Index (%) 137 147 UPPER BEAR RIVER Bear River RS 8777 10.1 -M * 18.6 -M * Bug Lake 7987 31.8 18.3 174 33.7 19.2 176 Burts Miller Ranch 8000 3.5 -M * 10.0 -M * Chalk Creek #1 9171 33.4 24.3 137 36.1 24.9 145 Hayden Fork 9130 21.8 15.4 142 29.7 20.9 142 Kelley R.S. 8180 25.1 14.8 170 30.0 17.8 169 Lily Lake 9133 14.2 12.6 113 20.0 17.0 118 Monte Cristo 8932 35.7 27.6 129 38.8 25.6 152 Salt River Summit 7760 19.3 12.9 150 28.3 16.4 173 ----- ----- Basin Index (%) 144 153 ----------------------------------------------------------------------------- -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.