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 15 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 22.9 13.2 173 40.1 21.3 188 Black Bear 8170 46.9 36.6 128 55.5 39.0 142 Blind Bull Sum 8650 43.8 23.8 184 -M 19.8 * Cottonwood Creek 7670 27.5 19.8 139 39.2 25.2 156 East Rim Divide 7930 13.9 10.0 139 21.2 11.9 178 Grand Targhee 9260 48.0 41.0 117 43.2 32.0 135 Granite Creek 6770 23.9 12.3 194 36.4 19.9 183 Grassy Lake 7265 37.1 31.5 118 56.1 36.6 153 Gros Ventre Summit 8750 -M 13.0 * -M 13.3 * Gunsight Pass 9820 23.8 13.4 178 25.7 14.3 180 Lewis Lake Divide 7850 45.3 30.2 150 56.3 36.1 156 Phillips Bench 8200 37.8 26.0 145 47.3 28.6 165 Salt River Summit 7760 19.1 11.2 171 29.5 17.0 174 Snake River Station 6920 16.3 12.8 127 36.3 22.9 159 Spring Creek Divide 9000 41.8 23.2 180 41.2 24.3 170 Thumb Divide 7980 21.5 14.4 149 28.4 19.0 149 Togwotee Pass 9580 33.9 23.0 147 39.4 24.9 158 Two Ocean Plateau 9240 -M 27.2 * -M 27.9 * Willow Creek 8380 28.2 26.7 106 51.1 34.4 149 Younts Peak 8350 25.7 14.7 175 31.6 16.2 195 ----- ----- Basin Index (%) 145 160 MADISON-GALLATIN Black Bear 8170 46.9 36.6 128 55.5 39.0 142 Canyon 7870 17.8 12.4 144 26.2 16.6 158 Madison Plateau 7750 28.1 22.5 125 37.3 26.8 139 West Yellowstone 6700 4.7 8.2 57 23.9 14.4 166 Whiskey Creek 6800 13.2 14.8 89 27.5 20.6 133 ----- ----- Basin Index (%) 117 145 YELLOWSTONE Beartooth Lake 9360 33.2 22.4 148 28.7 20.3 141 Burnt Mtn 5880 .1 .2 50* 15.0 13.5 111 Canyon 7870 17.8 12.4 144 26.2 16.6 158 Cole Creek 7850 12.2 15.6 78 9.5 14.0 68 Evening Star 9200 38.7 24.7 157 45.6 28.1 162 Fisher Creek 9100 44.1 31.9 138 48.4 32.6 148 Northeast Entrance 7350 6.0 8.0 75 20.9 12.6 166 Parker Peak 9400 37.1 20.5 181 35.2 18.2 193 Sylvan Lake 8420 24.4 20.0 122 38.1 22.9 166 Thumb Divide 7980 21.5 14.4 149 28.4 19.0 149 Two Ocean Plateau 9240 -M 27.2 * -M 27.9 * White Mill 8700 37.2 23.5 158 36.9 24.4 151 Wolverine 7650 3.9 8.6 45 21.2 12.6 168 ----- ----- Basin Index (%) 137 151 WIND RIVER Burroughs Creek 8750 22.1 -M * 28.0 -M * Castle Creek 8400 9.6 -M * 15.8 -M * Cold Springs 9630 16.5 5.8 284 20.3 10.4 195 Deer Park 9700 33.0 16.0 206 38.6 20.7 186 Hobbs Park 10100 30.1 14.9 202 29.1 14.2 205 Kirwin 9550 22.0 9.9 222 26.0 12.0 217 Little Warm 9370 19.0 10.2 186 25.4 13.4 190 Owl Creek 8975 9.7 5.1 190 13.3 6.4 208 South Pass 9040 32.0 15.8 203 29.1 18.0 162 St. Lawrence Alt 8620 9.1 6.4 142 17.5 9.4 186 Togwotee Pass 9580 33.9 23.0 147 39.4 24.9 158 Townsend Creek 8700 18.0 10.0 180 23.7 12.8 185 ----- ----- Basin Index (%) 191 185 BIGHORN BASIN Bald Mtn. 9380 20.8 19.4 107 18.0 17.7 102 Bear Trap Meadow 8200 4.8 4.4 109 9.6 9.1 105 Bone Springs Div 9350 20.8 16.8 124 18.8 16.2 116 Grave Springs 8550 7.2 9.6 75 8.7 11.2 78 Kirwin 9550 22.0 9.9 222 26.0 12.0 217 Marquette 8760 14.2 -M * 18.0 -M * Middle Powder 7760 8.6 12.4 69 8.6 12.3 70 Owl Creek 8975 9.7 5.1 190 13.3 6.4 208 Powder River Pass 9480 9.4 10.2 92 14.5 13.2 110 Shell Creek 9580 18.6 15.5 120 15.9 14.3 111 Timber Creek 7950 7.5 5.2 144 11.9 7.9 151 ----- ----- Basin Index (%) 119 121 SHOSHONE RIVER Blackwater 9780 38.7 23.7 163 42.9 21.3 201 Evening Star 9200 38.7 24.7 157 45.6 28.1 162 Marquette 8760 14.2 -M * 18.0 -M * Sylvan Road 7120 3.4 10.3 33 31.1 17.1 182 Younts Peak 8350 25.7 14.7 175 31.6 16.2 195 ----- ----- Basin Index (%) 145 183 POWDER RIVER Bear Trap Meadow 8200 4.8 4.4 109 9.6 9.1 105 Cloud Peak Reservoir 9860 16.4 15.4 106 20.3 14.2 143 Grave Springs 8550 7.2 9.6 75 8.7 11.2 78 Hansen Sawmill 8360 11.7 5.9 198 15.6 9.1 171 Middle Powder 7760 8.6 12.4 69 8.6 12.3 70 Powder River Pass 9480 9.4 10.2 92 14.5 13.2 110 Soldier Park 8720 15.2 -M * 15.7 -M * ----- ----- Basin Index (%) 100 112 TONGUE RIVER Big Goose 7990 12.1 9.7 125 15.2 12.1 126 Bone Springs Div 9350 20.8 16.8 124 18.8 16.2 116 Burgess Junction 7880 11.1 12.1 92 12.9 13.0 99 Dome Lake 8880 16.9 12.0 141 17.7 14.3 124 Little Goose 8870 14.7 -M * 18.7 -M * Sucker Creek 8880 13.7 12.6 109 15.0 15.1 99 Tie Creek 6870 2.0 4.8 42 14.5 12.3 118 ----- ----- Basin Index (%) 113 113 BELLE FOURCHE Cole Canyon 5910 .0 3.2 0 7.8 10.0 78 ----- ----- Basin Index (%) 0 78 CHEYENNE RIVER BASIN Blind Park 6890 .0 5.1 0 9.7 12.4 78 North Rapid Creek 6130 .0 5.5 0 8.1 10.4 78 ----- ----- Basin Index (%) 0 78 UPPER N. PLATTE Arapaho Ridge 10960 24.9 21.6 115 26.4 23.7 111 Blackhall Mtn 9820 35.7 -M * 38.1 -M * Columbine 9160 14.3 21.8 66 27.7 26.4 105 Divide Peak 8880 14.8 20.0 74 23.2 22.2 105 Joe Wright 10120 17.2 22.1 78 28.8 26.9 107 Laprele Creek 8375 8.2 9.0 91 12.7 13.2 96 Med Bow 10500 35.8 -M * 35.7 -M * North French Creek 10130 24.8 31.8 78 27.9 27.8 100 Never Summer 10280 21.8 20.5 106 19.6 -M * Old Battle 10000 36.6 32.2 114 38.9 36.1 108 Rawah 9020 6.4 9.6 67 17.4 15.0 116 Sage Creek Basin 7850 1.5 8.8 17 16.9 15.0 113 Sand Lake 10050 30.8 30.4 101 28.2 25.9 109 South Brush Creek 8440 -M 10.9 * 13.0 15.9 82 Tower 10500 38.2 47.4 81 44.2 41.1 108 Webber Springs 9250 25.9 23.3 111 33.8 27.7 122 Willow Creek Pass 9540 18.0 12.7 142 18.6 14.0 133 Zirkel 9340 28.2 23.9 118 42.4 29.2 145 ----- ----- Basin Index (%) 93 111 SWEETWATER Deer Park 9700 33.0 16.0 206 38.6 20.7 186 Larsen Creek 9000 14.5 10.8 134 23.5 -M * South Pass 9040 32.0 15.8 203 29.1 18.0 162 ----- ----- Basin Index (%) 187 175 LOWER N. PLATTE Casper Mtn. 7900 10.7 14.4 74 13.6 16.0 85 Laprele Creek 8375 8.2 9.0 91 12.7 13.2 96 Reno Hill 8400 12.3 14.1 87 15.3 16.5 93 Windy Peak 7900 6.1 7.4 82 11.9 11.2 106 ----- ----- Basin Index (%) 83 94 LARAMIE RIVER Brooklyn Lake 10240 21.8 22.2 98 23.6 22.1 107 Cinnabar Park 9574 14.9 21.0 71 22.6 24.9 91 Crow Creek 8330 .0 4.1 0 9.3 11.5 81 Deadman Hill 10220 21.3 16.5 129 20.9 18.2 115 Rawah 9020 6.4 9.6 67 17.4 15.0 116 Roach 9700 15.8 16.5 96 21.6 20.0 108 ----- ----- Basin Index (%) 89 103 S. PLATTE Black Mountain 8920 9.4 -M * 13.3 -M * Crow Creek 8330 .0 4.1 0 9.3 11.5 81 Deadman Hill 10220 21.3 16.5 129 20.9 18.2 115 ----- ----- Basin Index (%) 103 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 6.7 0 17.0 15.6 109 Divide Peak 8880 14.8 20.0 74 23.2 22.2 105 Elk River 8700 10.3 17.2 60 20.5 20.7 99 Little Snake River 8915 24.4 25.8 95 39.1 30.7 127 Old Battle 10000 36.6 32.2 114 38.9 36.1 108 Sage Creek Basin 7850 1.5 8.8 17 16.9 15.0 113 Sandstone RS 8150 2.2 11.8 19 16.3 19.0 86 Whiskey Park 8950 23.8 27.0 88 30.5 28.8 106 ----- ----- Basin Index (%) 76 108 UPPER GREEN RIVER Big Sandy Opening 9080 20.8 12.9 161 23.5 13.7 172 Blind Bull Sum 8650 43.8 23.8 184 -M 19.8 * East Rim Divide 7930 13.9 10.0 139 21.2 11.9 178 Elkhart Park G.S. 9400 19.6 12.0 163 24.7 13.7 180 Gros Ventre Summit 8750 -M 13.0 * -M 13.3 * Gunsight Pass 9820 23.8 13.4 178 25.7 14.3 180 Kendall R.S. 7740 17.8 9.8 182 29.4 14.4 204 Loomis Park 8240 25.6 13.6 188 32.7 17.6 186 New Fork Lake 8340 14.2 9.6 148 18.3 11.0 166 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 17.4 11.6 150 27.9 14.5 192 Spring Creek Divide 9000 41.8 23.2 180 41.2 24.3 170 Triple Peak 8500 35.5 19.7 180 41.6 25.7 162 ----- ----- Basin Index (%) 172 178 LOWER GREEN RIVER Blacks Fork Jct 8869 7.2 -M * 16.5 -M * Buck Pasture 9632 17.0 -M * 24.1 -M * EF Blacks Fork GS 9360 13.1 -M * 18.0 -M * Hams Fork 7840 12.5 8.6 145 21.9 11.7 187 Hewinta 9500 8.1 9.7 84 17.9 14.5 123 Hickerson Park 9122 7.5 6.6 114 13.4 10.7 125 Hole-in-Rock 9168 6.2 6.8 91 13.9 10.2 136 Indian Creek 9425 40.1 23.9 168 41.7 23.1 181 Kelley R.S. 8180 24.9 13.7 182 31.2 18.5 169 Spirit Lk 10235 15.8 -M * 19.1 -M * Steel Creek Park 10158 19.3 16.1 120 21.7 17.2 126 ----- ----- Basin Index (%) 139 153 UPPER BEAR RIVER Bear River RS 8777 6.4 -M * 19.0 -M * Bug Lake 7987 32.0 19.0 168 34.7 19.9 174 Burts Miller Ranch 8000 .0 -M * 10.6 -M * Chalk Creek #1 9171 33.3 24.9 134 37.1 26.1 142 Hayden Fork 9130 17.1 13.9 123 30.3 21.8 139 Kelley R.S. 8180 24.9 13.7 182 31.2 18.5 169 Lily Lake 9133 12.3 12.4 99 20.4 17.8 115 Monte Cristo 8932 36.4 27.8 131 40.5 26.8 151 Salt River Summit 7760 19.1 11.2 171 29.5 17.0 174 ----- ----- Basin Index (%) 142 151 ----------------------------------------------------------------------------- -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.