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 1 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.9 14.8 161 38.6 20.2 191 Black Bear 8170 44.9 36.3 124 51.9 36.6 142 Blind Bull Sum 8650 41.9 22.4 187 -M 18.8 * Cottonwood Creek 7670 26.5 21.2 125 36.5 23.7 154 East Rim Divide 7930 16.9 10.0 169 20.7 11.3 183 Grand Targhee 9260 43.3 36.5 119 38.9 29.4 132 Granite Creek 6770 26.7 14.9 179 35.4 19.1 185 Grassy Lake 7265 35.3 31.6 112 52.6 34.6 152 Gros Ventre Summit 8750 19.4 12.9 150 23.4 12.4 189 Gunsight Pass 9820 21.5 13.4 160 23.7 13.2 180 Lewis Lake Divide 7850 43.9 29.5 149 54.1 34.1 159 Phillips Bench 8200 36.4 24.2 150 45.4 27.1 168 Salt River Summit 7760 19.5 12.9 151 -M 16.0 * Snake River Station 6920 18.7 15.5 121 34.5 21.6 160 Spring Creek Divide 9000 39.7 22.5 176 39.4 22.9 172 Thumb Divide 7980 22.7 14.9 152 27.1 17.8 152 Togwotee Pass 9580 32.3 21.6 150 37.0 23.3 159 Two Ocean Plateau 9240 -M 25.6 * -M 26.2 * Willow Creek 8380 28.2 27.8 101 47.2 32.2 147 Younts Peak 8350 25.2 14.1 179 30.2 15.2 199 ----- ----- Basin Index (%) 143 161 MADISON-GALLATIN Black Bear 8170 44.9 36.3 124 51.9 36.6 142 Canyon 7870 17.2 12.3 140 24.9 15.5 161 Madison Plateau 7750 26.3 21.3 123 35.0 25.2 139 West Yellowstone 6700 8.0 10.2 78 22.4 13.5 166 Whiskey Creek 6800 13.4 15.0 89 26.0 19.4 134 ----- ----- Basin Index (%) 115 145 YELLOWSTONE Beartooth Lake 9360 31.5 21.0 150 26.8 18.9 142 Burnt Mtn 5880 1.2 4.4 27 -M 12.1 * Canyon 7870 17.2 12.3 140 24.9 15.5 161 Cole Creek 7850 11.3 13.5 84 8.1 12.0 68 Evening Star 9200 37.3 23.9 156 43.7 26.1 167 Fisher Creek 9100 42.7 30.1 142 46.1 30.4 152 Northeast Entrance 7350 9.3 9.6 97 19.9 11.7 170 Parker Peak 9400 33.0 18.8 176 33.0 16.9 195 Sylvan Lake 8420 23.0 19.2 120 36.0 21.3 169 Thumb Divide 7980 22.7 14.9 152 27.1 17.8 152 Two Ocean Plateau 9240 -M 25.6 * -M 26.2 * White Mill 8700 34.9 21.6 162 35.2 22.7 155 Wolverine 7650 7.1 9.1 78 20.4 11.7 174 ----- ----- Basin Index (%) 137 157 WIND RIVER Burroughs Creek 8750 23.5 -M * 26.9 -M * Castle Creek 8400 10.7 -M * 14.9 -M * Cold Springs 9630 -M 7.1 * -M 9.5 * Deer Park 9700 -M 14.7 * 36.9 18.6 198 Hobbs Park 10100 29.0 13.4 216 -M 12.5 * Kirwin 9550 22.2 9.4 236 24.2 11.0 220 Little Warm 9370 18.1 10.2 177 23.8 12.3 193 Owl Creek 8975 9.2 5.5 167 11.6 5.7 204 South Pass 9040 30.8 14.9 207 27.9 16.6 168 St. Lawrence Alt 8620 -M 6.8 * -M 8.5 * Togwotee Pass 9580 32.3 21.6 150 37.0 23.3 159 Townsend Creek 8700 18.4 9.0 204 22.0 11.3 195 ----- ----- Basin Index (%) 190 186 BIGHORN BASIN Bald Mtn. 9380 18.8 18.6 101 16.0 16.3 98 Bear Trap Meadow 8200 4.6 5.1 90 7.7 8.1 95 Bone Springs Div 9350 19.0 15.9 119 17.0 14.8 115 Grave Springs 8550 6.7 8.9 75 7.3 10.0 73 Kirwin 9550 22.2 9.4 236 24.2 11.0 220 Marquette 8760 -M -M * 16.2 -M * Middle Powder 7760 7.0 11.4 61 6.9 11.1 62 Owl Creek 8975 9.2 5.5 167 11.6 5.7 204 Powder River Pass 9480 8.1 10.0 81 11.9 12.0 99 Shell Creek 9580 16.4 14.5 113 13.5 13.2 102 Timber Creek 7950 7.2 4.8 150 10.5 7.0 150 ----- ----- Basin Index (%) 115 116 SHOSHONE RIVER Blackwater 9780 36.9 22.1 167 41.1 19.7 209 Evening Star 9200 37.3 23.9 156 43.7 26.1 167 Marquette 8760 -M -M * 16.2 -M * Sylvan Road 7120 9.3 11.1 84 29.9 16.1 186 Younts Peak 8350 25.2 14.1 179 30.2 15.2 199 ----- ----- Basin Index (%) 153 188 POWDER RIVER Bear Trap Meadow 8200 4.6 5.1 90 7.7 8.1 95 Cloud Peak Reservoir 9860 15.4 14.1 109 16.8 12.6 133 Grave Springs 8550 6.7 8.9 75 7.3 10.0 73 Hansen Sawmill 8360 -M 6.3 * 13.2 8.1 163 Middle Powder 7760 7.0 11.4 61 6.9 11.1 62 Powder River Pass 9480 8.1 10.0 81 11.9 12.0 99 Soldier Park 8720 14.6 -M * 13.3 -M * ----- ----- Basin Index (%) 84 103 TONGUE RIVER Big Goose 7990 11.4 8.9 128 13.0 10.6 123 Bone Springs Div 9350 19.0 15.9 119 17.0 14.8 115 Burgess Junction 7880 10.3 11.3 91 11.3 11.7 97 Dome Lake 8880 15.7 11.5 137 15.6 12.9 121 Little Goose 8870 12.9 -M * 16.0 -M * Sucker Creek 8880 12.8 11.4 112 12.7 13.6 93 Tie Creek 6870 -M 5.4 * -M 10.9 * ----- ----- Basin Index (%) 117 109 BELLE FOURCHE Cole Canyon 5910 .0 5.8 0 6.9 8.8 78 ----- ----- Basin Index (%) 0 78 CHEYENNE RIVER BASIN Blind Park 6890 .0 7.2 0 8.3 11.3 73 North Rapid Creek 6130 .5 6.7 7 6.9 9.3 74 ----- ----- Basin Index (%) 4 74 UPPER N. PLATTE Arapaho Ridge 10960 24.3 19.8 123 25.0 21.3 117 Blackhall Mtn 9820 35.1 -M * 36.5 -M * Columbine 9160 18.8 22.8 82 26.4 24.5 108 Divide Peak 8880 15.5 19.5 79 21.6 20.5 105 Joe Wright 10120 17.5 20.2 87 27.1 24.6 110 Laprele Creek 8375 10.5 9.5 111 11.8 11.8 100 Med Bow 10500 36.9 -M * 33.8 -M * North French Creek 10130 23.6 28.0 84 26.3 25.7 102 Never Summer 10280 21.0 19.6 107 18.2 -M * Old Battle 10000 35.6 29.6 120 37.2 33.6 111 Rawah 9020 9.4 10.3 91 16.1 13.5 119 Sage Creek Basin 7850 7.1 12.7 56 15.9 13.9 114 Sand Lake 10050 29.7 27.5 108 26.6 23.6 113 South Brush Creek 8440 5.2 12.2 43 11.9 14.6 82 Tower 10500 38.9 44.0 88 42.2 38.1 111 Webber Springs 9250 25.4 23.0 110 32.5 25.6 127 Willow Creek Pass 9540 16.9 11.8 143 17.8 12.8 139 Zirkel 9340 32.5 26.4 123 40.9 27.2 150 ----- ----- Basin Index (%) 99 114 SWEETWATER Deer Park 9700 -M 14.7 * 36.9 18.6 198 Larsen Creek 9000 17.3 12.2 142 23.0 -M * South Pass 9040 30.8 14.9 207 27.9 16.6 168 ----- ----- Basin Index (%) 177 184 LOWER N. PLATTE Casper Mtn. 7900 10.6 13.4 79 12.0 14.0 86 Laprele Creek 8375 10.5 9.5 111 11.8 11.8 100 Reno Hill 8400 12.1 13.2 92 13.4 14.5 92 Windy Peak 7900 8.3 7.8 106 11.1 10.0 111 ----- ----- Basin Index (%) 95 96 LARAMIE RIVER Brooklyn Lake 10240 22.4 20.0 112 22.3 20.1 111 Cinnabar Park 9574 17.3 20.0 86 21.7 23.0 94 Crow Creek 8330 .3 6.8 4 9.0 10.2 88 Deadman Hill 10220 20.1 15.6 129 19.6 16.4 120 Rawah 9020 9.4 10.3 91 16.1 13.5 119 Roach 9700 16.1 15.6 103 20.2 18.3 110 ----- ----- Basin Index (%) 97 107 S. PLATTE Black Mountain 8920 10.6 -M * 12.3 -M * Crow Creek 8330 .3 6.8 4 9.0 10.2 88 Deadman Hill 10220 20.1 15.6 129 19.6 16.4 120 ----- ----- Basin Index (%) 91 108 LITTLE SNAKE RIVER Battle Mountain 7440 -M 10.6 * 16.3 14.5 112 Divide Peak 8880 15.5 19.5 79 21.6 20.5 105 Elk River 8700 12.7 18.5 69 19.6 19.3 102 Little Snake River 8915 26.6 23.2 115 37.8 28.5 133 Old Battle 10000 35.6 29.6 120 37.2 33.6 111 Sage Creek Basin 7850 7.1 12.7 56 15.9 13.9 114 Sandstone RS 8150 7.5 13.1 57 15.9 17.7 90 Whiskey Park 8950 25.0 25.8 97 29.1 26.9 108 ----- ----- Basin Index (%) 91 111 UPPER GREEN RIVER Big Sandy Opening 9080 20.8 12.3 169 22.9 12.7 180 Blind Bull Sum 8650 41.9 22.4 187 -M 18.8 * East Rim Divide 7930 16.9 10.0 169 20.7 11.3 183 Elkhart Park G.S. 9400 18.7 12.1 155 23.7 12.8 185 Gros Ventre Summit 8750 19.4 12.9 150 23.4 12.4 189 Gunsight Pass 9820 21.5 13.4 160 23.7 13.2 180 Kendall R.S. 7740 20.4 11.4 179 28.5 13.7 208 Loomis Park 8240 26.6 14.3 186 31.6 16.7 189 New Fork Lake 8340 15.6 10.3 151 17.4 10.4 167 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.9 12.2 155 26.8 13.7 196 Spring Creek Divide 9000 39.7 22.5 176 39.4 22.9 172 Triple Peak 8500 35.4 21.7 163 39.8 24.4 163 ----- ----- Basin Index (%) 169 181 LOWER GREEN RIVER Blacks Fork Jct 8869 9.3 -M * 15.8 -M * Buck Pasture 9632 17.8 -M * 23.2 -M * EF Blacks Fork GS 9360 15.5 -M * 17.0 -M * Hams Fork 7840 14.3 10.8 132 21.2 10.9 194 Hewinta 9500 9.0 10.9 83 17.2 13.4 128 Hickerson Park 9122 9.8 7.5 131 13.0 9.7 134 Hole-in-Rock 9168 7.8 7.0 111 13.6 9.2 148 Indian Creek 9425 40.0 23.9 167 -M 21.7 * Kelley R.S. 8180 25.0 14.9 168 29.9 17.4 172 Spirit Lk 10235 16.4 -M * 18.6 -M * Steel Creek Park 10158 18.8 15.3 123 20.7 15.7 132 ----- ----- Basin Index (%) 138 152 UPPER BEAR RIVER Bear River RS 8777 9.8 -M * 18.4 -M * Bug Lake 7987 31.7 18.1 175 33.6 18.7 180 Burts Miller Ranch 8000 3.6 -M * 10.0 -M * Chalk Creek #1 9171 33.5 23.4 143 35.8 24.1 149 Hayden Fork 9130 19.9 15.1 132 29.6 20.1 147 Kelley R.S. 8180 25.0 14.9 168 29.9 17.4 172 Lily Lake 9133 14.0 12.1 116 19.9 16.3 122 Monte Cristo 8932 35.6 26.3 135 38.3 24.9 154 Salt River Summit 7760 19.5 12.9 151 -M 16.0 * ----- ----- Basin Index (%) 146 154 ----------------------------------------------------------------------------- -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.