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 13 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.0 14.0 171 40.1 21.2 189 Black Bear 8170 45.6 36.6 125 54.5 38.7 141 Blind Bull Sum 8650 44.3 23.7 187 -M 19.7 * Cottonwood Creek 7670 -M 20.3 * -M 25.0 * East Rim Divide 7930 15.2 10.1 150 21.3 11.9 179 Grand Targhee 9260 -M 40.4 * -M 31.4 * Granite Creek 6770 25.0 13.0 192 36.3 19.8 183 Grassy Lake 7265 37.6 31.4 120 55.6 36.4 153 Gros Ventre Summit 8750 -M 12.9 * -M 13.2 * Gunsight Pass 9820 23.9 13.6 176 25.8 14.1 183 Lewis Lake Divide 7850 46.9 30.2 155 56.1 35.8 157 Phillips Bench 8200 -M 26.0 * -M 28.4 * Salt River Summit 7760 19.9 11.8 169 -M 16.9 * Snake River Station 6920 17.7 13.6 130 36.1 22.7 159 Spring Creek Divide 9000 41.9 23.0 182 41.2 24.1 171 Thumb Divide 7980 22.2 14.6 152 28.3 18.9 150 Togwotee Pass 9580 34.2 22.8 150 39.3 24.7 159 Two Ocean Plateau 9240 -M 26.9 * -M 27.6 * Willow Creek 8380 -M 27.2 * -M 34.2 * Younts Peak 8350 26.1 14.6 179 31.7 16.0 198 ----- ----- Basin Index (%) 155 164 MADISON-GALLATIN Black Bear 8170 45.6 36.6 125 54.5 38.7 141 Canyon 7870 18.0 12.3 146 26.1 16.5 158 Madison Plateau 7750 27.8 22.3 125 36.7 26.6 138 West Yellowstone 6700 5.7 8.5 67 23.5 14.3 164 Whiskey Creek 6800 13.3 14.6 91 27.3 20.5 133 ----- ----- Basin Index (%) 117 144 YELLOWSTONE Beartooth Lake 9360 33.4 22.0 152 28.5 20.1 142 Burnt Mtn 5880 .0 1.7 0 15.0 13.3 113 Canyon 7870 18.0 12.3 146 26.1 16.5 158 Cole Creek 7850 12.5 15.4 81 9.6 13.7 70 Evening Star 9200 39.0 24.4 160 45.5 27.8 164 Fisher Creek 9100 44.1 31.7 139 48.1 32.2 149 Northeast Entrance 7350 7.4 8.4 88 20.9 12.5 167 Parker Peak 9400 36.6 20.2 181 35.2 18.0 196 Sylvan Lake 8420 24.8 19.8 125 37.9 22.7 167 Thumb Divide 7980 22.2 14.6 152 28.3 18.9 150 Two Ocean Plateau 9240 -M 26.9 * -M 27.6 * White Mill 8700 37.4 23.3 161 36.7 24.1 152 Wolverine 7650 4.5 9.1 49 21.5 12.4 173 ----- ----- Basin Index (%) 138 152 WIND RIVER Burroughs Creek 8750 23.0 -M * 28.0 -M * Castle Creek 8400 10.6 -M * 15.9 -M * Cold Springs 9630 17.6 6.0 293 20.4 10.3 198 Deer Park 9700 33.5 16.2 207 38.6 20.5 188 Hobbs Park 10100 30.5 14.9 205 29.1 14.1 206 Kirwin 9550 22.7 9.9 229 25.9 11.9 218 Little Warm 9370 19.2 10.3 186 25.4 13.2 192 Owl Creek 8975 10.5 5.4 194 13.5 6.3 214 South Pass 9040 31.9 15.8 202 29.0 17.9 162 St. Lawrence Alt 8620 10.0 6.7 149 17.5 9.3 188 Togwotee Pass 9580 34.2 22.8 150 39.3 24.7 159 Townsend Creek 8700 18.6 10.0 186 23.7 12.7 187 ----- ----- Basin Index (%) 194 186 BIGHORN BASIN Bald Mtn. 9380 20.8 19.3 108 18.1 17.5 103 Bear Trap Meadow 8200 5.6 4.6 122 9.7 8.9 109 Bone Springs Div 9350 21.0 17.0 124 18.9 16.0 118 Grave Springs 8550 7.7 9.6 80 8.8 11.0 80 Kirwin 9550 22.7 9.9 229 25.9 11.9 218 Marquette 8760 14.7 -M * 18.2 -M * Middle Powder 7760 8.9 12.4 72 8.6 12.2 70 Owl Creek 8975 10.5 5.4 194 13.5 6.3 214 Powder River Pass 9480 9.8 10.3 95 14.4 13.0 111 Shell Creek 9580 18.9 15.6 121 15.8 14.2 111 Timber Creek 7950 8.0 5.2 154 11.9 7.7 155 ----- ----- Basin Index (%) 123 123 SHOSHONE RIVER Blackwater 9780 38.7 23.5 165 42.8 21.0 204 Evening Star 9200 39.0 24.4 160 45.5 27.8 164 Marquette 8760 14.7 -M * 18.2 -M * Sylvan Road 7120 5.1 10.4 49 31.0 16.9 183 Younts Peak 8350 26.1 14.6 179 31.7 16.0 198 ----- ----- Basin Index (%) 149 185 POWDER RIVER Bear Trap Meadow 8200 5.6 4.6 122 9.7 8.9 109 Cloud Peak Reservoir 9860 18.4 15.3 120 20.3 14.0 145 Grave Springs 8550 7.7 9.6 80 8.8 11.0 80 Hansen Sawmill 8360 12.5 6.1 205 15.7 9.0 174 Middle Powder 7760 8.9 12.4 72 8.6 12.2 70 Powder River Pass 9480 9.8 10.3 95 14.4 13.0 111 Soldier Park 8720 16.3 -M * 15.8 -M * ----- ----- Basin Index (%) 108 114 TONGUE RIVER Big Goose 7990 12.6 9.9 127 15.2 12.0 127 Bone Springs Div 9350 21.0 17.0 124 18.9 16.0 118 Burgess Junction 7880 11.5 12.2 94 12.9 12.9 100 Dome Lake 8880 17.2 12.0 143 17.7 14.2 125 Little Goose 8870 15.1 -M * 18.8 -M * Sucker Creek 8880 14.2 12.6 113 15.1 15.0 101 Tie Creek 6870 3.4 5.1 67 14.5 12.1 120 ----- ----- Basin Index (%) 116 115 BELLE FOURCHE Cole Canyon 5910 .0 3.8 0 7.8 9.9 79 ----- ----- Basin Index (%) 0 79 CHEYENNE RIVER BASIN Blind Park 6890 .0 5.8 0 9.7 12.4 78 North Rapid Creek 6130 .0 5.9 0 8.2 10.3 80 ----- ----- Basin Index (%) 0 79 UPPER N. PLATTE Arapaho Ridge 10960 25.2 21.5 117 26.4 23.6 112 Blackhall Mtn 9820 36.4 -M * 38.1 -M * Columbine 9160 16.2 22.6 72 27.6 26.2 105 Divide Peak 8880 15.7 20.3 77 23.3 22.0 106 Joe Wright 10120 18.3 22.0 83 28.8 26.7 108 Laprele Creek 8375 9.6 9.3 103 12.7 13.0 98 Med Bow 10500 38.4 -M * 35.7 -M * North French Creek 10130 25.1 31.2 80 27.9 27.5 101 Never Summer 10280 21.7 20.5 106 19.6 -M * Old Battle 10000 36.7 32.1 114 38.9 35.8 109 Rawah 9020 7.6 10.0 76 17.5 15.0 117 Sage Creek Basin 7850 3.8 9.9 38 16.9 15.0 113 Sand Lake 10050 31.1 30.1 103 28.2 25.6 110 South Brush Creek 8440 -M 11.3 * 13.0 15.8 82 Tower 10500 39.3 47.2 83 44.2 40.8 108 Webber Springs 9250 25.9 23.4 111 33.8 27.4 123 Willow Creek Pass 9540 18.1 12.6 144 18.7 13.9 135 Zirkel 9340 31.1 24.7 126 42.5 29.1 146 ----- ----- Basin Index (%) 96 112 SWEETWATER Deer Park 9700 33.5 16.2 207 38.6 20.5 188 Larsen Creek 9000 16.0 11.0 145 23.6 -M * South Pass 9040 31.9 15.8 202 29.0 17.9 162 ----- ----- Basin Index (%) 189 176 LOWER N. PLATTE Casper Mtn. 7900 11.6 14.5 80 13.6 15.7 87 Laprele Creek 8375 9.6 9.3 103 12.7 13.0 98 Reno Hill 8400 13.0 14.2 92 15.4 16.2 95 Windy Peak 7900 7.3 7.5 97 11.9 11.0 108 ----- ----- Basin Index (%) 91 96 LARAMIE RIVER Brooklyn Lake 10240 22.8 22.3 102 23.5 21.8 108 Cinnabar Park 9574 16.5 21.3 77 22.6 24.8 91 Crow Creek 8330 .0 5.5 0 9.3 11.4 82 Deadman Hill 10220 21.5 16.6 130 20.9 18.0 116 Rawah 9020 7.6 10.0 76 17.5 15.0 117 Roach 9700 16.5 16.5 100 21.6 19.9 109 ----- ----- Basin Index (%) 92 104 S. PLATTE Black Mountain 8920 10.3 -M * 13.3 -M * Crow Creek 8330 .0 5.5 0 9.3 11.4 82 Deadman Hill 10220 21.5 16.6 130 20.9 18.0 116 ----- ----- Basin Index (%) 97 103 LITTLE SNAKE RIVER Battle Mountain 7440 -M 7.7 * 16.9 15.4 110 Divide Peak 8880 15.7 20.3 77 23.3 22.0 106 Elk River 8700 11.7 17.8 66 20.6 20.6 100 Little Snake River 8915 25.8 26.0 99 39.2 30.7 128 Old Battle 10000 36.7 32.1 114 38.9 35.8 109 Sage Creek Basin 7850 3.8 9.9 38 16.9 15.0 113 Sandstone RS 8150 4.4 12.4 35 16.4 18.8 87 Whiskey Park 8950 25.0 27.5 91 30.6 28.5 107 ----- ----- Basin Index (%) 84 109 UPPER GREEN RIVER Big Sandy Opening 9080 21.3 12.9 165 23.6 13.6 174 Blind Bull Sum 8650 44.3 23.7 187 -M 19.7 * East Rim Divide 7930 15.2 10.1 150 21.3 11.9 179 Elkhart Park G.S. 9400 20.1 12.2 165 24.7 13.6 182 Gros Ventre Summit 8750 -M 12.9 * -M 13.2 * Gunsight Pass 9820 23.9 13.6 176 25.8 14.1 183 Kendall R.S. 7740 19.3 10.4 186 29.5 14.3 206 Loomis Park 8240 26.6 13.7 194 32.7 17.5 187 New Fork Lake 8340 15.3 9.8 156 18.2 10.9 167 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.2 12.0 152 27.9 14.4 194 Spring Creek Divide 9000 41.9 23.0 182 41.2 24.1 171 Triple Peak 8500 36.3 20.3 179 41.6 25.6 162 ----- ----- Basin Index (%) 175 179 LOWER GREEN RIVER Blacks Fork Jct 8869 -M -M * -M -M * Buck Pasture 9632 17.9 -M * 24.0 -M * EF Blacks Fork GS 9360 14.5 -M * 17.9 -M * Hams Fork 7840 13.5 9.2 147 22.0 11.6 190 Hewinta 9500 9.1 10.3 88 18.0 14.5 124 Hickerson Park 9122 8.6 7.2 119 13.5 10.6 127 Hole-in-Rock 9168 7.3 7.1 103 14.2 10.1 141 Indian Creek 9425 41.2 24.3 170 41.8 22.9 183 Kelley R.S. 8180 26.1 14.0 186 31.2 18.3 170 Spirit Lk 10235 16.4 -M * 19.2 -M * Steel Creek Park 10158 19.6 16.1 122 21.7 17.1 127 ----- ----- Basin Index (%) 142 155 UPPER BEAR RIVER Bear River RS 8777 7.7 -M * 19.0 -M * Bug Lake 7987 33.1 19.2 172 34.8 19.8 176 Burts Miller Ranch 8000 1.2 -M * 10.7 -M * Chalk Creek #1 9171 34.4 24.8 139 37.1 25.9 143 Hayden Fork 9130 18.6 14.4 129 30.4 21.6 141 Kelley R.S. 8180 26.1 14.0 186 31.2 18.3 170 Lily Lake 9133 13.4 12.7 106 20.5 17.7 116 Monte Cristo 8932 37.8 27.8 136 40.5 26.5 153 Salt River Summit 7760 19.9 11.8 169 -M 16.9 * ----- ----- Basin Index (%) 147 150 ----------------------------------------------------------------------------- -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.