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 3 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.2 15.0 161 39.0 20.4 191 Black Bear 8170 44.7 36.8 121 52.4 37.0 142 Blind Bull Sum 8650 42.3 22.8 186 -M 19.0 * Cottonwood Creek 7670 26.9 21.3 126 36.8 24.0 153 East Rim Divide 7930 16.3 10.1 161 20.7 11.4 182 Grand Targhee 9260 44.2 37.2 119 39.2 30.0 131 Granite Creek 6770 26.5 14.8 179 35.5 19.2 185 Grassy Lake 7265 36.3 31.6 115 53.7 35.0 153 Gros Ventre Summit 8750 19.7 13.0 152 23.6 12.5 189 Gunsight Pass 9820 22.3 13.5 165 24.3 13.4 181 Lewis Lake Divide 7850 44.7 29.6 151 54.4 34.5 158 Phillips Bench 8200 36.6 24.6 149 45.5 27.4 166 Salt River Summit 7760 19.4 13.0 149 28.2 16.2 174 Snake River Station 6920 18.6 15.2 122 35.3 21.8 162 Spring Creek Divide 9000 39.9 22.5 177 39.5 23.2 170 Thumb Divide 7980 22.6 14.8 153 27.5 18.0 153 Togwotee Pass 9580 33.0 21.7 152 37.8 23.6 160 Two Ocean Plateau 9240 -M 25.7 * -M 26.4 * Willow Creek 8380 28.3 28.1 101 47.8 32.7 146 Younts Peak 8350 25.7 14.2 181 30.6 15.3 200 ----- ----- Basin Index (%) 143 162 MADISON-GALLATIN Black Bear 8170 44.7 36.8 121 52.4 37.0 142 Canyon 7870 17.5 12.4 141 25.3 15.7 161 Madison Plateau 7750 26.5 21.4 124 35.3 25.5 138 West Yellowstone 6700 7.2 10.2 71 22.5 13.8 163 Whiskey Creek 6800 13.4 15.0 89 26.2 19.5 134 ----- ----- Basin Index (%) 114 145 YELLOWSTONE Beartooth Lake 9360 32.2 21.2 152 27.2 19.1 142 Burnt Mtn 5880 .6 4.5 13 14.7 12.4 119 Canyon 7870 17.5 12.4 141 25.3 15.7 161 Cole Creek 7850 12.2 13.9 88 8.6 12.2 70 Evening Star 9200 37.9 23.8 159 44.1 26.4 167 Fisher Creek 9100 42.8 30.6 140 46.1 30.7 150 Northeast Entrance 7350 8.7 9.4 93 20.1 11.8 170 Parker Peak 9400 34.1 18.9 180 33.7 17.0 198 Sylvan Lake 8420 23.6 19.2 123 36.9 21.6 171 Thumb Divide 7980 22.6 14.8 153 27.5 18.0 153 Two Ocean Plateau 9240 -M 25.7 * -M 26.4 * White Mill 8700 35.2 21.8 161 35.3 22.9 154 Wolverine 7650 6.5 9.3 70 20.8 11.8 176 ----- ----- Basin Index (%) 137 155 WIND RIVER Burroughs Creek 8750 23.4 -M * 27.1 -M * Castle Creek 8400 11.0 -M * 15.6 -M * Cold Springs 9630 17.3 7.1 244 19.5 9.7 201 Deer Park 9700 32.6 14.9 219 37.6 19.1 197 Hobbs Park 10100 29.3 13.6 215 27.4 12.8 214 Kirwin 9550 23.0 9.5 242 24.7 11.2 221 Little Warm 9370 18.5 10.2 181 24.0 12.4 194 Owl Creek 8975 10.0 5.7 175 12.2 5.8 210 South Pass 9040 31.2 15.0 208 28.3 16.9 167 St. Lawrence Alt 8620 10.4 6.8 153 16.9 8.7 194 Togwotee Pass 9580 33.0 21.7 152 37.8 23.6 160 Townsend Creek 8700 18.5 9.2 201 22.5 11.5 196 ----- ----- Basin Index (%) 197 191 BIGHORN BASIN Bald Mtn. 9380 19.2 18.9 102 16.4 16.5 99 Bear Trap Meadow 8200 5.2 5.1 102 8.4 8.2 102 Bone Springs Div 9350 19.6 16.3 120 17.4 15.0 116 Grave Springs 8550 6.9 9.0 77 7.6 10.1 75 Kirwin 9550 23.0 9.5 242 24.7 11.2 221 Marquette 8760 13.6 -M * 17.2 -M * Middle Powder 7760 7.3 11.6 63 7.0 11.3 62 Owl Creek 8975 10.0 5.7 175 12.2 5.8 210 Powder River Pass 9480 8.9 10.0 89 12.9 12.1 107 Shell Creek 9580 17.1 14.7 116 14.0 13.3 105 Timber Creek 7950 8.0 4.8 167 11.2 7.1 158 ----- ----- Basin Index (%) 119 119 SHOSHONE RIVER Blackwater 9780 37.6 22.3 169 41.7 19.9 210 Evening Star 9200 37.9 23.8 159 44.1 26.4 167 Marquette 8760 13.6 -M * 17.2 -M * Sylvan Road 7120 8.3 11.0 75 30.3 16.3 186 Younts Peak 8350 25.7 14.2 181 30.6 15.3 200 ----- ----- Basin Index (%) 154 188 POWDER RIVER Bear Trap Meadow 8200 5.2 5.1 102 8.4 8.2 102 Cloud Peak Reservoir 9860 16.2 14.3 113 17.6 12.8 138 Grave Springs 8550 6.9 9.0 77 7.6 10.1 75 Hansen Sawmill 8360 11.4 6.3 181 13.9 8.2 170 Middle Powder 7760 7.3 11.6 63 7.0 11.3 62 Powder River Pass 9480 8.9 10.0 89 12.9 12.1 107 Soldier Park 8720 15.2 -M * 13.8 -M * ----- ----- Basin Index (%) 99 107 TONGUE RIVER Big Goose 7990 11.9 9.2 129 13.6 10.9 125 Bone Springs Div 9350 19.6 16.3 120 17.4 15.0 116 Burgess Junction 7880 10.6 11.5 92 11.5 11.9 97 Dome Lake 8880 16.2 11.6 140 16.2 13.1 124 Little Goose 8870 13.7 -M * 16.8 -M * Sucker Creek 8880 13.4 11.6 116 13.3 13.9 96 Tie Creek 6870 4.6 5.5 84 13.7 11.1 123 ----- ----- Basin Index (%) 116 113 BELLE FOURCHE Cole Canyon 5910 .1 5.7 2 6.9 9.0 77 ----- ----- Basin Index (%) 2 77 CHEYENNE RIVER BASIN Blind Park 6890 .1 7.2 1 8.8 11.4 77 North Rapid Creek 6130 .3 6.7 4 7.3 9.4 78 ----- ----- Basin Index (%) 3 77 UPPER N. PLATTE Arapaho Ridge 10960 24.6 20.2 122 25.3 21.5 118 Blackhall Mtn 9820 35.5 -M * 36.8 -M * Columbine 9160 18.6 23.2 80 26.8 24.8 108 Divide Peak 8880 15.3 19.6 78 21.9 20.8 105 Joe Wright 10120 17.8 20.5 87 27.5 25.0 110 Laprele Creek 8375 10.7 9.4 114 12.0 12.1 99 Med Bow 10500 37.6 -M * 34.5 -M * North French Creek 10130 24.0 28.5 84 26.8 26.0 103 Never Summer 10280 21.2 19.9 107 18.4 -M * Old Battle 10000 35.9 30.3 118 37.5 34.1 110 Rawah 9020 9.2 10.4 88 16.5 13.7 120 Sage Creek Basin 7850 6.6 12.6 52 16.1 14.1 114 Sand Lake 10050 30.1 28.1 107 26.8 24.0 112 South Brush Creek 8440 4.7 12.2 39 12.1 14.8 82 Tower 10500 39.2 44.8 88 42.6 38.6 110 Webber Springs 9250 25.5 23.0 111 32.8 26.0 126 Willow Creek Pass 9540 17.1 11.9 144 17.9 13.0 138 Zirkel 9340 32.0 26.3 122 41.2 27.6 149 ----- ----- Basin Index (%) 98 114 SWEETWATER Deer Park 9700 32.6 14.9 219 37.6 19.1 197 Larsen Creek 9000 17.5 12.0 146 23.1 -M * South Pass 9040 31.2 15.0 208 28.3 16.9 167 ----- ----- Basin Index (%) 194 183 LOWER N. PLATTE Casper Mtn. 7900 10.9 13.8 79 12.3 14.3 86 Laprele Creek 8375 10.7 9.4 114 12.0 12.1 99 Reno Hill 8400 12.4 13.6 91 13.6 14.8 92 Windy Peak 7900 8.5 7.8 109 11.3 10.2 111 ----- ----- Basin Index (%) 95 96 LARAMIE RIVER Brooklyn Lake 10240 22.6 20.7 109 22.6 20.4 111 Cinnabar Park 9574 17.2 20.4 84 21.9 23.3 94 Crow Creek 8330 .3 7.0 4 9.2 10.4 88 Deadman Hill 10220 20.4 15.8 129 19.8 16.7 119 Rawah 9020 9.2 10.4 88 16.5 13.7 120 Roach 9700 16.2 16.0 101 20.4 18.6 110 ----- ----- Basin Index (%) 95 107 S. PLATTE Black Mountain 8920 10.7 -M * 12.4 -M * Crow Creek 8330 .3 7.0 4 9.2 10.4 88 Deadman Hill 10220 20.4 15.8 129 19.8 16.7 119 ----- ----- Basin Index (%) 91 107 LITTLE SNAKE RIVER Battle Mountain 7440 -M 10.4 * 16.5 14.6 113 Divide Peak 8880 15.3 19.6 78 21.9 20.8 105 Elk River 8700 12.5 18.9 66 19.8 19.5 102 Little Snake River 8915 26.6 23.8 112 38.1 28.9 132 Old Battle 10000 35.9 30.3 118 37.5 34.1 110 Sage Creek Basin 7850 6.6 12.6 52 16.1 14.1 114 Sandstone RS 8150 7.3 13.0 56 15.8 17.9 88 Whiskey Park 8950 25.4 26.5 96 29.6 27.2 109 ----- ----- Basin Index (%) 90 110 UPPER GREEN RIVER Big Sandy Opening 9080 20.9 12.4 169 23.0 12.8 180 Blind Bull Sum 8650 42.3 22.8 186 -M 19.0 * East Rim Divide 7930 16.3 10.1 161 20.7 11.4 182 Elkhart Park G.S. 9400 18.9 12.2 155 23.9 12.9 185 Gros Ventre Summit 8750 19.7 13.0 152 23.6 12.5 189 Gunsight Pass 9820 22.3 13.5 165 24.3 13.4 181 Kendall R.S. 7740 20.6 11.5 179 28.8 13.8 209 Loomis Park 8240 26.3 14.1 187 31.8 16.8 189 New Fork Lake 8340 15.6 10.3 151 17.6 10.5 168 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.6 12.3 151 26.9 13.9 194 Spring Creek Divide 9000 39.9 22.5 177 39.5 23.2 170 Triple Peak 8500 35.4 21.9 162 40.0 24.7 162 ----- ----- Basin Index (%) 168 181 LOWER GREEN RIVER Blacks Fork Jct 8869 9.4 -M * 16.0 -M * Buck Pasture 9632 17.8 -M * 23.6 -M * EF Blacks Fork GS 9360 15.6 -M * 17.3 -M * Hams Fork 7840 14.4 10.9 132 21.2 11.1 191 Hewinta 9500 9.3 10.9 85 17.4 13.6 128 Hickerson Park 9122 9.9 7.7 129 13.1 9.9 132 Hole-in-Rock 9168 8.0 7.0 114 13.7 9.4 146 Indian Creek 9425 39.5 24.2 163 -M 22.0 * Kelley R.S. 8180 25.1 15.0 167 30.0 17.6 170 Spirit Lk 10235 16.6 -M * 18.8 -M * Steel Creek Park 10158 19.1 15.5 123 21.1 16.0 132 ----- ----- Basin Index (%) 137 150 UPPER BEAR RIVER Bear River RS 8777 9.7 -M * 18.6 -M * Bug Lake 7987 31.8 18.2 175 33.7 18.9 178 Burts Miller Ranch 8000 3.5 -M * 10.1 -M * Chalk Creek #1 9171 33.6 23.8 141 35.3 24.5 144 Hayden Fork 9130 20.4 15.3 133 29.7 20.5 145 Kelley R.S. 8180 25.1 15.0 167 30.0 17.6 170 Lily Lake 9133 14.2 12.3 115 20.0 16.6 120 Monte Cristo 8932 35.9 26.9 133 38.7 25.3 153 Salt River Summit 7760 19.4 13.0 149 28.2 16.2 174 ----- ----- 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.