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 SATURDAY: APRIL 8 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.1 15.2 159 39.3 20.7 190 Black Bear 8170 45.8 37.1 123 53.3 37.9 141 Blind Bull Sum 8650 43.1 23.3 185 -M 19.3 * Cottonwood Creek 7670 27.4 20.9 131 37.8 24.4 155 East Rim Divide 7930 15.5 10.2 152 20.9 11.7 179 Grand Targhee 9260 45.5 38.7 118 39.4 30.7 128 Granite Creek 6770 26.0 14.3 182 35.8 19.5 184 Grassy Lake 7265 37.5 31.4 119 54.6 35.6 153 Gros Ventre Summit 8750 -M 12.9 * -M 12.8 * Gunsight Pass 9820 23.1 13.9 166 25.0 13.8 181 Lewis Lake Divide 7850 45.9 30.0 153 54.8 35.1 156 Phillips Bench 8200 37.8 25.5 148 46.2 27.9 166 Salt River Summit 7760 19.5 12.7 154 28.8 16.5 175 Snake River Station 6920 18.4 14.8 124 35.7 22.2 161 Spring Creek Divide 9000 40.7 22.5 181 40.1 23.6 170 Thumb Divide 7980 22.5 14.7 153 27.9 18.4 152 Togwotee Pass 9580 33.5 22.2 151 38.5 24.1 160 Two Ocean Plateau 9240 -M 26.2 * -M 26.9 * Willow Creek 8380 28.5 28.4 100 48.9 33.3 147 Younts Peak 8350 25.6 14.4 178 31.2 15.6 200 ----- ----- Basin Index (%) 144 160 MADISON-GALLATIN Black Bear 8170 45.8 37.1 123 53.3 37.9 141 Canyon 7870 17.4 12.4 140 25.6 16.1 159 Madison Plateau 7750 27.2 21.6 126 35.9 26.1 138 West Yellowstone 6700 6.2 9.3 67 23.2 14.1 165 Whiskey Creek 6800 13.5 14.8 91 26.6 20.0 133 ----- ----- Basin Index (%) 116 144 YELLOWSTONE Beartooth Lake 9360 32.6 21.4 152 27.7 19.5 142 Burnt Mtn 5880 .1 4.3 2 14.7 12.9 114 Canyon 7870 17.4 12.4 140 25.6 16.1 159 Cole Creek 7850 11.8 14.8 80 9.0 12.9 70 Evening Star 9200 38.2 23.8 161 44.5 27.1 164 Fisher Creek 9100 42.8 31.3 137 46.4 31.3 148 Northeast Entrance 7350 7.7 8.9 87 20.4 12.1 169 Parker Peak 9400 35.1 19.6 179 34.3 17.5 196 Sylvan Lake 8420 24.0 19.4 124 37.3 22.0 170 Thumb Divide 7980 22.5 14.7 153 27.9 18.4 152 Two Ocean Plateau 9240 -M 26.2 * -M 26.9 * White Mill 8700 36.0 22.3 161 35.6 23.4 152 Wolverine 7650 6.1 9.6 64 21.0 12.1 174 ----- ----- Basin Index (%) 135 153 WIND RIVER Burroughs Creek 8750 23.3 -M * 27.6 -M * Castle Creek 8400 11.0 -M * 15.8 -M * Cold Springs 9630 17.6 6.6 267 20.0 9.9 202 Deer Park 9700 32.9 15.8 208 37.9 19.9 190 Hobbs Park 10100 29.9 14.2 211 28.2 13.5 209 Kirwin 9550 22.8 9.6 238 25.4 11.5 221 Little Warm 9370 -M 10.3 * 24.6 12.8 192 Owl Creek 8975 10.1 5.8 174 12.6 6.0 210 South Pass 9040 31.7 15.3 207 28.6 17.3 165 St. Lawrence Alt 8620 10.6 6.9 154 17.4 9.0 193 Togwotee Pass 9580 33.5 22.2 151 38.5 24.1 160 Townsend Creek 8700 18.7 9.7 193 23.0 12.0 192 ----- ----- Basin Index (%) 196 188 BIGHORN BASIN Bald Mtn. 9380 19.4 19.2 101 17.0 16.8 101 Bear Trap Meadow 8200 4.8 4.9 98 8.7 8.6 101 Bone Springs Div 9350 20.0 16.9 118 18.0 15.5 116 Grave Springs 8550 6.9 9.5 73 7.9 10.7 74 Kirwin 9550 22.8 9.6 238 25.4 11.5 221 Marquette 8760 14.3 -M * 17.7 -M * Middle Powder 7760 7.3 12.1 60 7.7 11.7 66 Owl Creek 8975 10.1 5.8 174 12.6 6.0 210 Powder River Pass 9480 9.1 10.2 89 13.5 12.6 107 Shell Creek 9580 17.4 15.2 114 14.7 13.7 107 Timber Creek 7950 8.2 5.0 164 11.7 7.3 160 ----- ----- Basin Index (%) 116 120 SHOSHONE RIVER Blackwater 9780 38.1 22.7 168 42.1 20.3 207 Evening Star 9200 38.2 23.8 161 44.5 27.1 164 Marquette 8760 14.3 -M * 17.7 -M * Sylvan Road 7120 6.7 10.7 63 30.5 16.5 185 Younts Peak 8350 25.6 14.4 178 31.2 15.6 200 ----- ----- Basin Index (%) 152 187 POWDER RIVER Bear Trap Meadow 8200 4.8 4.9 98 8.7 8.6 101 Cloud Peak Reservoir 9860 16.3 14.9 109 18.3 13.4 137 Grave Springs 8550 6.9 9.5 73 7.9 10.7 74 Hansen Sawmill 8360 11.2 6.1 184 14.2 8.6 165 Middle Powder 7760 7.3 12.1 60 7.7 11.7 66 Powder River Pass 9480 9.1 10.2 89 13.5 12.6 107 Soldier Park 8720 14.9 -M * 14.2 -M * ----- ----- Basin Index (%) 96 107 TONGUE RIVER Big Goose 7990 11.9 9.7 123 14.2 11.5 123 Bone Springs Div 9350 20.0 16.9 118 18.0 15.5 116 Burgess Junction 7880 10.6 12.0 88 12.1 12.3 98 Dome Lake 8880 16.5 11.8 140 16.8 13.6 124 Little Goose 8870 13.8 -M * 17.3 -M * Sucker Creek 8880 13.4 12.3 109 14.1 14.4 98 Tie Creek 6870 3.7 5.6 66 13.8 11.7 118 ----- ----- Basin Index (%) 111 113 BELLE FOURCHE Cole Canyon 5910 .0 4.9 0 7.5 9.6 78 ----- ----- Basin Index (%) 0 78 CHEYENNE RIVER BASIN Blind Park 6890 .0 6.9 0 9.1 11.9 76 North Rapid Creek 6130 .0 6.4 0 7.7 10.0 77 ----- ----- Basin Index (%) 0 77 UPPER N. PLATTE Arapaho Ridge 10960 25.0 21.0 119 26.0 22.6 115 Blackhall Mtn 9820 35.8 -M * 37.4 -M * Columbine 9160 17.9 23.4 76 27.4 25.5 107 Divide Peak 8880 15.8 20.0 79 22.6 21.4 106 Joe Wright 10120 18.6 21.4 87 28.6 25.8 111 Laprele Creek 8375 10.4 9.4 111 12.6 12.5 101 Med Bow 10500 38.4 -M * 34.8 -M * North French Creek 10130 24.4 29.7 82 27.1 26.7 101 Never Summer 10280 -M 20.4 * 19.3 -M * Old Battle 10000 35.8 31.5 114 38.0 34.9 109 Rawah 9020 8.9 10.6 84 17.0 14.4 118 Sage Creek Basin 7850 5.3 11.6 46 16.4 14.6 112 Sand Lake 10050 30.6 29.1 105 27.4 24.8 110 South Brush Creek 8440 3.3 11.8 28 12.8 15.2 84 Tower 10500 39.0 46.0 85 43.3 39.8 109 Webber Springs 9250 25.8 23.1 112 33.1 26.7 124 Willow Creek Pass 9540 18.0 12.2 148 18.6 13.4 139 Zirkel 9340 32.0 26.2 122 41.7 28.5 146 ----- ----- Basin Index (%) 95 113 SWEETWATER Deer Park 9700 32.9 15.8 208 37.9 19.9 190 Larsen Creek 9000 16.6 11.5 144 23.3 -M * South Pass 9040 31.7 15.3 207 28.6 17.3 165 ----- ----- Basin Index (%) 191 179 LOWER N. PLATTE Casper Mtn. 7900 11.4 14.4 79 13.0 15.1 86 Laprele Creek 8375 10.4 9.4 111 12.6 12.5 101 Reno Hill 8400 12.5 14.0 89 14.4 15.6 92 Windy Peak 7900 8.4 7.7 109 11.9 10.6 112 ----- ----- Basin Index (%) 94 96 LARAMIE RIVER Brooklyn Lake 10240 22.8 22.0 104 23.1 21.1 109 Cinnabar Park 9574 17.2 21.3 81 22.2 24.1 92 Crow Creek 8330 .0 6.9 0 9.3 10.9 85 Deadman Hill 10220 21.1 16.2 130 20.4 17.3 118 Rawah 9020 8.9 10.6 84 17.0 14.4 118 Roach 9700 16.5 16.6 99 21.1 19.1 110 ----- ----- Basin Index (%) 92 106 S. PLATTE Black Mountain 8920 10.9 -M * 13.1 -M * Crow Creek 8330 .0 6.9 0 9.3 10.9 85 Deadman Hill 10220 21.1 16.2 130 20.4 17.3 118 ----- ----- Basin Index (%) 91 105 LITTLE SNAKE RIVER Battle Mountain 7440 -M 9.3 * 16.7 15.0 111 Divide Peak 8880 15.8 20.0 79 22.6 21.4 106 Elk River 8700 11.9 19.1 62 20.2 20.0 101 Little Snake River 8915 26.2 25.5 103 38.4 29.9 128 Old Battle 10000 35.8 31.5 114 38.0 34.9 109 Sage Creek Basin 7850 5.3 11.6 46 16.4 14.6 112 Sandstone RS 8150 5.8 12.8 45 16.2 18.3 89 Whiskey Park 8950 25.5 27.5 93 29.7 27.9 106 ----- ----- Basin Index (%) 85 109 UPPER GREEN RIVER Big Sandy Opening 9080 21.2 12.7 167 23.1 13.2 175 Blind Bull Sum 8650 43.1 23.3 185 -M 19.3 * East Rim Divide 7930 15.5 10.2 152 20.9 11.7 179 Elkhart Park G.S. 9400 19.3 12.3 157 24.1 13.2 183 Gros Ventre Summit 8750 -M 12.9 * -M 12.8 * Gunsight Pass 9820 23.1 13.9 166 25.0 13.8 181 Kendall R.S. 7740 19.8 11.4 174 29.1 14.1 206 Loomis Park 8240 26.6 13.8 193 32.0 17.2 186 New Fork Lake 8340 15.4 10.3 150 17.8 10.7 166 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.1 12.3 147 27.1 14.1 192 Spring Creek Divide 9000 40.7 22.5 181 40.1 23.6 170 Triple Peak 8500 36.0 21.8 165 40.4 25.1 161 ----- ----- Basin Index (%) 169 178 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 16.0 -M * Buck Pasture 9632 17.7 -M * 23.6 -M * EF Blacks Fork GS 9360 14.9 -M * 17.0 -M * Hams Fork 7840 13.8 10.5 131 21.4 11.3 189 Hewinta 9500 8.8 10.9 81 17.4 14.0 124 Hickerson Park 9122 9.4 7.9 119 13.3 10.2 130 Hole-in-Rock 9168 7.5 7.0 107 13.8 9.7 142 Indian Creek 9425 40.1 24.7 162 40.8 22.4 182 Kelley R.S. 8180 24.9 14.6 171 30.0 18.0 167 Spirit Lk 10235 16.7 -M * 18.9 -M * Steel Creek Park 10158 19.1 15.8 121 21.1 16.5 128 ----- ----- Basin Index (%) 135 155 UPPER BEAR RIVER Bear River RS 8777 8.5 -M * 18.6 -M * Bug Lake 7987 32.7 18.5 177 33.8 19.3 175 Burts Miller Ranch 8000 1.9 -M * 10.2 -M * Chalk Creek #1 9171 33.5 24.4 137 36.0 25.1 143 Hayden Fork 9130 19.3 15.3 126 29.8 21.1 141 Kelley R.S. 8180 24.9 14.6 171 30.0 18.0 167 Lily Lake 9133 13.6 12.7 107 19.8 17.1 116 Monte Cristo 8932 35.9 27.8 129 38.9 25.9 150 Salt River Summit 7760 19.5 12.7 154 28.8 16.5 175 ----- ----- Basin Index (%) 142 152 ----------------------------------------------------------------------------- -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.