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 SUNDAY: APRIL 2 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.4 14.9 157 38.6 20.3 190 Black Bear 8170 44.7 36.6 122 52.0 36.8 141 Blind Bull Sum 8650 42.2 22.6 187 -M 18.9 * Cottonwood Creek 7670 26.2 21.3 123 36.5 23.8 153 East Rim Divide 7930 16.4 10.0 164 20.7 11.4 182 Grand Targhee 9260 43.3 36.9 117 38.9 29.9 130 Granite Creek 6770 26.5 14.8 179 35.4 19.2 184 Grassy Lake 7265 35.4 31.6 112 52.6 34.8 151 Gros Ventre Summit 8750 19.4 13.0 149 23.5 12.5 188 Gunsight Pass 9820 21.7 13.4 162 23.7 13.3 178 Lewis Lake Divide 7850 44.3 29.5 150 54.2 34.3 158 Phillips Bench 8200 36.5 24.4 150 45.3 27.3 166 Salt River Summit 7760 19.4 12.9 150 28.2 16.1 175 Snake River Station 6920 17.9 15.3 117 34.5 21.7 159 Spring Creek Divide 9000 39.7 22.5 176 39.4 23.1 171 Thumb Divide 7980 22.1 14.8 149 27.1 17.9 151 Togwotee Pass 9580 32.2 21.7 148 37.0 23.4 158 Two Ocean Plateau 9240 -M 25.6 * -M 26.3 * Willow Creek 8380 28.2 28.0 101 47.3 32.4 146 Younts Peak 8350 25.2 14.2 177 30.6 15.2 201 ----- ----- Basin Index (%) 142 161 MADISON-GALLATIN Black Bear 8170 44.7 36.6 122 52.0 36.8 141 Canyon 7870 17.0 12.4 137 24.9 15.7 159 Madison Plateau 7750 26.2 21.4 122 35.0 25.4 138 West Yellowstone 6700 7.4 10.2 73 22.4 13.6 165 Whiskey Creek 6800 13.3 15.0 89 26.0 19.4 134 ----- ----- Basin Index (%) 114 145 YELLOWSTONE Beartooth Lake 9360 31.6 21.1 150 27.0 19.0 142 Burnt Mtn 5880 .8 4.4 18 14.4 12.3 117 Canyon 7870 17.0 12.4 137 24.9 15.7 159 Cole Creek 7850 11.3 13.7 82 8.2 12.1 68 Evening Star 9200 37.6 23.9 157 43.8 26.3 167 Fisher Creek 9100 42.6 30.4 140 46.0 30.5 151 Northeast Entrance 7350 8.7 9.5 92 20.0 11.8 169 Parker Peak 9400 33.2 18.9 176 33.2 17.0 195 Sylvan Lake 8420 23.0 19.2 120 36.0 21.5 167 Thumb Divide 7980 22.1 14.8 149 27.1 17.9 151 Two Ocean Plateau 9240 -M 25.6 * -M 26.3 * White Mill 8700 35.0 21.7 161 35.3 22.8 155 Wolverine 7650 7.2 9.2 78 20.5 11.8 174 ----- ----- Basin Index (%) 136 154 WIND RIVER Burroughs Creek 8750 22.9 -M * 27.0 -M * Castle Creek 8400 10.4 -M * 14.7 -M * Cold Springs 9630 16.9 7.1 238 19.3 9.6 201 Deer Park 9700 32.5 14.8 220 37.5 18.8 199 Hobbs Park 10100 29.1 13.5 216 27.3 12.7 215 Kirwin 9550 22.2 9.5 234 24.5 11.1 221 Little Warm 9370 18.1 10.2 177 23.8 12.3 193 Owl Creek 8975 9.2 5.6 164 11.6 5.7 204 South Pass 9040 31.1 14.9 209 28.3 16.7 169 St. Lawrence Alt 8620 -M 6.8 * 16.8 8.6 195 Togwotee Pass 9580 32.2 21.7 148 37.0 23.4 158 Townsend Creek 8700 18.4 9.1 202 22.5 11.4 197 ----- ----- Basin Index (%) 197 191 BIGHORN BASIN Bald Mtn. 9380 18.8 18.8 100 16.2 16.4 99 Bear Trap Meadow 8200 4.6 5.1 90 7.7 8.1 95 Bone Springs Div 9350 19.0 16.1 118 17.3 14.9 116 Grave Springs 8550 6.7 9.0 74 7.4 10.1 73 Kirwin 9550 22.2 9.5 234 24.5 11.1 221 Marquette 8760 12.2 -M * 16.4 -M * Middle Powder 7760 7.0 11.5 61 7.0 11.2 62 Owl Creek 8975 9.2 5.6 164 11.6 5.7 204 Powder River Pass 9480 8.1 10.0 81 12.0 12.0 100 Shell Creek 9580 16.5 14.7 112 13.6 13.2 103 Timber Creek 7950 7.2 4.8 150 10.5 7.1 148 ----- ----- Basin Index (%) 114 116 SHOSHONE RIVER Blackwater 9780 36.9 22.2 166 41.2 19.8 208 Evening Star 9200 37.6 23.9 157 43.8 26.3 167 Marquette 8760 12.2 -M * 16.4 -M * Sylvan Road 7120 8.3 11.1 75 29.9 16.1 186 Younts Peak 8350 25.2 14.2 177 30.6 15.2 201 ----- ----- Basin Index (%) 151 188 POWDER RIVER Bear Trap Meadow 8200 4.6 5.1 90 7.7 8.1 95 Cloud Peak Reservoir 9860 15.3 14.2 108 17.0 12.7 134 Grave Springs 8550 6.7 9.0 74 7.4 10.1 73 Hansen Sawmill 8360 -M 6.3 * 13.2 8.2 161 Middle Powder 7760 7.0 11.5 61 7.0 11.2 62 Powder River Pass 9480 8.1 10.0 81 12.0 12.0 100 Soldier Park 8720 14.6 -M * 13.4 -M * ----- ----- Basin Index (%) 84 103 TONGUE RIVER Big Goose 7990 11.3 9.1 124 13.2 10.8 122 Bone Springs Div 9350 19.0 16.1 118 17.3 14.9 116 Burgess Junction 7880 10.2 11.4 89 11.4 11.8 97 Dome Lake 8880 15.7 11.6 135 15.7 13.0 121 Little Goose 8870 12.8 -M * 16.0 -M * Sucker Creek 8880 12.7 11.5 110 12.8 13.8 93 Tie Creek 6870 4.4 5.5 80 13.5 11.0 123 ----- ----- Basin Index (%) 112 111 BELLE FOURCHE Cole Canyon 5910 .0 5.8 0 6.9 8.9 78 ----- ----- Basin Index (%) 0 78 CHEYENNE RIVER BASIN Blind Park 6890 .0 7.2 0 8.3 11.3 73 North Rapid Creek 6130 .0 6.8 0 6.9 9.3 74 ----- ----- Basin Index (%) 0 74 UPPER N. PLATTE Arapaho Ridge 10960 24.2 20.0 121 25.0 21.5 116 Blackhall Mtn 9820 35.2 -M * 36.4 -M * Columbine 9160 19.0 23.0 83 26.6 24.6 108 Divide Peak 8880 15.3 19.6 78 21.8 20.7 105 Joe Wright 10120 17.4 20.4 85 27.1 24.8 109 Laprele Creek 8375 10.7 9.5 113 12.0 11.9 101 Med Bow 10500 37.0 -M * 33.9 -M * North French Creek 10130 23.4 28.2 83 26.4 25.8 102 Never Summer 10280 21.0 19.8 106 18.2 -M * Old Battle 10000 35.5 30.0 118 37.3 33.9 110 Rawah 9020 9.0 10.4 87 16.2 13.7 118 Sage Creek Basin 7850 6.8 12.6 54 15.9 14.0 114 Sand Lake 10050 29.8 27.8 107 26.7 23.8 112 South Brush Creek 8440 4.7 12.2 39 12.1 14.7 82 Tower 10500 39.1 44.4 88 42.5 38.3 111 Webber Springs 9250 25.5 23.0 111 32.5 25.8 126 Willow Creek Pass 9540 17.0 11.8 144 17.8 12.9 138 Zirkel 9340 32.8 26.4 124 41.0 27.5 149 ----- ----- Basin Index (%) 98 114 SWEETWATER Deer Park 9700 32.5 14.8 220 37.5 18.8 199 Larsen Creek 9000 17.3 12.1 143 23.0 -M * South Pass 9040 31.1 14.9 209 28.3 16.7 169 ----- ----- Basin Index (%) 194 185 LOWER N. PLATTE Casper Mtn. 7900 10.7 13.6 79 12.1 14.1 86 Laprele Creek 8375 10.7 9.5 113 12.0 11.9 101 Reno Hill 8400 12.1 13.4 90 13.5 14.6 92 Windy Peak 7900 8.4 7.8 108 11.2 10.1 111 ----- ----- Basin Index (%) 95 96 LARAMIE RIVER Brooklyn Lake 10240 22.6 20.3 111 22.5 20.3 111 Cinnabar Park 9574 17.4 20.2 86 21.7 23.2 94 Crow Creek 8330 .2 6.9 3 9.0 10.3 87 Deadman Hill 10220 20.1 15.7 128 19.5 16.5 118 Rawah 9020 9.0 10.4 87 16.2 13.7 118 Roach 9700 16.2 15.8 103 20.2 18.4 110 ----- ----- Basin Index (%) 96 107 S. PLATTE Black Mountain 8920 10.7 -M * 12.3 -M * Crow Creek 8330 .2 6.9 3 9.0 10.3 87 Deadman Hill 10220 20.1 15.7 128 19.5 16.5 118 ----- ----- Basin Index (%) 90 106 LITTLE SNAKE RIVER Battle Mountain 7440 -M 10.5 * 16.3 14.6 112 Divide Peak 8880 15.3 19.6 78 21.8 20.7 105 Elk River 8700 12.5 18.7 67 19.7 19.4 102 Little Snake River 8915 26.4 23.5 112 37.8 28.8 131 Old Battle 10000 35.5 30.0 118 37.3 33.9 110 Sage Creek Basin 7850 6.8 12.6 54 15.9 14.0 114 Sandstone RS 8150 7.2 13.0 55 15.9 17.8 89 Whiskey Park 8950 25.1 26.1 96 29.1 27.0 108 ----- ----- Basin Index (%) 90 110 UPPER GREEN RIVER Big Sandy Opening 9080 20.9 12.4 169 22.9 12.7 180 Blind Bull Sum 8650 42.2 22.6 187 -M 18.9 * East Rim Divide 7930 16.4 10.0 164 20.7 11.4 182 Elkhart Park G.S. 9400 18.7 12.1 155 23.7 12.8 185 Gros Ventre Summit 8750 19.4 13.0 149 23.5 12.5 188 Gunsight Pass 9820 21.7 13.4 162 23.7 13.3 178 Kendall R.S. 7740 20.2 11.4 177 28.5 13.8 207 Loomis Park 8240 26.3 14.2 185 31.7 16.8 189 New Fork Lake 8340 15.3 10.4 147 17.4 10.4 167 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.6 12.3 151 27.0 13.8 196 Spring Creek Divide 9000 39.7 22.5 176 39.4 23.1 171 Triple Peak 8500 -M 21.8 * -M 24.5 * ----- ----- Basin Index (%) 168 184 LOWER GREEN RIVER Blacks Fork Jct 8869 9.2 -M * 15.8 -M * Buck Pasture 9632 17.6 -M * 23.3 -M * EF Blacks Fork GS 9360 15.3 -M * 17.1 -M * Hams Fork 7840 14.1 10.9 129 21.2 11.0 193 Hewinta 9500 9.0 10.9 83 17.1 13.5 127 Hickerson Park 9122 9.8 7.6 129 13.0 9.8 133 Hole-in-Rock 9168 7.9 6.9 114 13.6 9.2 148 Indian Creek 9425 39.6 24.1 164 -M 21.8 * Kelley R.S. 8180 25.1 15.0 167 29.9 17.5 171 Spirit Lk 10235 16.5 -M * 18.7 -M * Steel Creek Park 10158 18.8 15.4 122 20.7 15.8 131 ----- ----- Basin Index (%) 137 150 UPPER BEAR RIVER Bear River RS 8777 9.4 -M * 18.4 -M * Bug Lake 7987 31.8 18.2 175 33.6 18.8 179 Burts Miller Ranch 8000 3.4 -M * 10.0 -M * Chalk Creek #1 9171 33.4 23.6 142 35.8 24.3 147 Hayden Fork 9130 19.6 15.2 129 29.5 20.3 145 Kelley R.S. 8180 25.1 15.0 167 29.9 17.5 171 Lily Lake 9133 13.9 12.2 114 19.8 16.5 120 Monte Cristo 8932 35.4 26.6 133 38.4 25.1 153 Salt River Summit 7760 19.4 12.9 150 28.2 16.1 175 ----- ----- Basin Index (%) 144 155 ----------------------------------------------------------------------------- -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.