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 WEDNESDAY: APRIL 5 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 25.1 15.2 165 39.2 20.5 191 Black Bear 8170 45.0 37.1 121 52.5 37.4 140 Blind Bull Sum 8650 42.2 23.1 183 -M 19.2 * Cottonwood Creek 7670 27.3 21.1 129 37.0 24.2 153 East Rim Divide 7930 15.9 10.2 156 20.6 11.5 179 Grand Targhee 9260 44.3 37.9 117 39.2 30.4 129 Granite Creek 6770 26.7 14.7 182 35.6 19.4 184 Grassy Lake 7265 36.2 31.6 115 53.6 35.3 152 Gros Ventre Summit 8750 19.7 13.0 152 23.8 12.7 187 Gunsight Pass 9820 22.4 13.6 165 24.3 13.5 180 Lewis Lake Divide 7850 44.8 29.7 151 54.6 34.7 157 Phillips Bench 8200 36.7 24.9 147 45.9 27.6 166 Salt River Summit 7760 19.5 12.9 151 28.2 16.4 172 Snake River Station 6920 19.3 15.0 129 35.2 22.0 160 Spring Creek Divide 9000 39.8 22.5 177 39.6 23.4 169 Thumb Divide 7980 22.6 14.7 154 27.6 18.2 152 Togwotee Pass 9580 33.1 21.9 151 38.0 23.8 160 Two Ocean Plateau 9240 -M 25.8 * -M 26.6 * Willow Creek 8380 27.9 28.3 99 48.0 33.0 145 Younts Peak 8350 25.3 14.3 177 30.9 15.4 201 ----- ----- Basin Index (%) 143 161 MADISON-GALLATIN Black Bear 8170 45.0 37.1 121 52.5 37.4 140 Canyon 7870 17.7 12.5 142 25.4 15.9 160 Madison Plateau 7750 26.6 21.4 124 35.4 25.8 137 West Yellowstone 6700 7.5 9.9 76 22.6 13.9 163 Whiskey Creek 6800 13.3 14.9 89 26.4 19.7 134 ----- ----- Basin Index (%) 115 144 YELLOWSTONE Beartooth Lake 9360 32.3 21.2 152 27.5 19.3 142 Burnt Mtn 5880 .0 4.6 0 14.7 12.7 116 Canyon 7870 17.7 12.5 142 25.4 15.9 160 Cole Creek 7850 12.3 14.3 86 8.9 12.6 71 Evening Star 9200 37.9 23.8 159 44.4 26.7 166 Fisher Creek 9100 42.6 30.9 138 46.3 31.0 149 Northeast Entrance 7350 8.9 9.2 97 20.2 11.9 170 Parker Peak 9400 34.2 19.2 178 33.7 17.2 196 Sylvan Lake 8420 23.7 19.3 123 36.9 21.8 169 Thumb Divide 7980 22.6 14.7 154 27.6 18.2 152 Two Ocean Plateau 9240 -M 25.8 * -M 26.6 * White Mill 8700 35.3 22.0 160 35.5 23.2 153 Wolverine 7650 6.1 9.4 65 20.8 11.9 175 ----- ----- Basin Index (%) 136 154 WIND RIVER Burroughs Creek 8750 23.2 -M * 27.2 -M * Castle Creek 8400 11.2 -M * 15.5 -M * Cold Springs 9630 17.3 6.9 251 19.7 9.8 201 Deer Park 9700 32.6 15.2 214 38.2 19.4 197 Hobbs Park 10100 29.4 13.9 212 27.4 13.2 208 Kirwin 9550 23.1 9.6 241 25.1 11.3 222 Little Warm 9370 18.5 10.2 181 24.1 12.6 191 Owl Creek 8975 10.4 5.8 179 12.5 5.9 212 South Pass 9040 31.3 15.1 207 28.5 17.1 167 St. Lawrence Alt 8620 10.5 6.8 154 17.0 8.8 193 Togwotee Pass 9580 33.1 21.9 151 38.0 23.8 160 Townsend Creek 8700 18.6 9.4 198 22.7 11.8 192 ----- ----- Basin Index (%) 196 189 BIGHORN BASIN Bald Mtn. 9380 19.5 19.0 103 16.7 16.6 101 Bear Trap Meadow 8200 5.2 5.0 104 8.6 8.3 104 Bone Springs Div 9350 20.0 16.6 120 17.7 15.2 116 Grave Springs 8550 7.0 9.2 76 7.8 10.3 76 Kirwin 9550 23.1 9.6 241 25.1 11.3 222 Marquette 8760 14.0 -M * 17.7 -M * Middle Powder 7760 7.4 11.8 63 7.4 11.4 65 Owl Creek 8975 10.4 5.8 179 12.5 5.9 212 Powder River Pass 9480 9.2 10.1 91 13.2 12.3 107 Shell Creek 9580 17.3 14.8 117 14.3 13.5 106 Timber Creek 7950 8.4 4.9 171 11.7 7.2 162 ----- ----- Basin Index (%) 119 121 SHOSHONE RIVER Blackwater 9780 37.6 22.4 168 41.7 20.1 207 Evening Star 9200 37.9 23.8 159 44.4 26.7 166 Marquette 8760 14.0 -M * 17.7 -M * Sylvan Road 7120 8.8 10.9 81 30.4 16.4 185 Younts Peak 8350 25.3 14.3 177 30.9 15.4 201 ----- ----- Basin Index (%) 154 188 POWDER RIVER Bear Trap Meadow 8200 5.2 5.0 104 8.6 8.3 104 Cloud Peak Reservoir 9860 16.5 14.6 113 18.0 13.0 138 Grave Springs 8550 7.0 9.2 76 7.8 10.3 76 Hansen Sawmill 8360 11.6 6.2 187 14.3 8.4 170 Middle Powder 7760 7.4 11.8 63 7.4 11.4 65 Powder River Pass 9480 9.2 10.1 91 13.2 12.3 107 Soldier Park 8720 15.3 -M * 14.0 -M * ----- ----- Basin Index (%) 100 109 TONGUE RIVER Big Goose 7990 12.1 9.4 129 14.0 11.2 125 Bone Springs Div 9350 20.0 16.6 120 17.7 15.2 116 Burgess Junction 7880 10.8 11.7 92 11.8 12.1 98 Dome Lake 8880 16.6 11.7 142 16.6 13.3 125 Little Goose 8870 14.1 -M * 17.2 -M * Sucker Creek 8880 13.7 11.9 115 13.8 14.1 98 Tie Creek 6870 4.6 5.5 84 13.7 11.4 120 ----- ----- Basin Index (%) 116 113 BELLE FOURCHE Cole Canyon 5910 .0 5.5 0 7.0 9.2 76 ----- ----- Basin Index (%) 0 76 CHEYENNE RIVER BASIN Blind Park 6890 .3 7.1 4 9.0 11.6 78 North Rapid Creek 6130 .2 6.7 3 7.5 9.6 78 ----- ----- Basin Index (%) 4 78 UPPER N. PLATTE Arapaho Ridge 10960 25.3 20.6 123 26.0 22.0 118 Blackhall Mtn 9820 35.8 -M * 37.3 -M * Columbine 9160 18.5 23.3 79 26.7 25.1 106 Divide Peak 8880 15.7 19.8 79 22.0 21.1 104 Joe Wright 10120 18.6 20.8 89 28.4 25.4 112 Laprele Creek 8375 11.1 9.4 118 12.2 12.3 99 Med Bow 10500 37.8 -M * 34.6 -M * North French Creek 10130 24.0 29.0 83 27.0 26.3 103 Never Summer 10280 21.8 20.2 108 19.2 -M * Old Battle 10000 35.9 30.9 116 37.5 34.4 109 Rawah 9020 9.7 10.5 92 16.7 13.9 120 Sage Creek Basin 7850 6.4 12.4 52 16.5 14.2 116 Sand Lake 10050 30.1 28.5 106 27.0 24.3 111 South Brush Creek 8440 4.4 12.0 37 12.0 15.0 80 Tower 10500 38.9 45.3 86 42.8 39.2 109 Webber Springs 9250 25.4 23.0 110 33.0 26.3 125 Willow Creek Pass 9540 17.9 12.0 149 18.5 13.2 140 Zirkel 9340 31.8 26.3 121 41.6 27.9 149 ----- ----- Basin Index (%) 98 114 SWEETWATER Deer Park 9700 32.6 15.2 214 38.2 19.4 197 Larsen Creek 9000 17.3 11.8 147 23.0 -M * South Pass 9040 31.3 15.1 207 28.5 17.1 167 ----- ----- Basin Index (%) 193 183 LOWER N. PLATTE Casper Mtn. 7900 11.2 14.2 79 12.6 14.6 86 Laprele Creek 8375 11.1 9.4 118 12.2 12.3 99 Reno Hill 8400 12.6 13.9 91 13.7 15.1 91 Windy Peak 7900 8.7 7.8 112 11.4 10.3 111 ----- ----- Basin Index (%) 96 95 LARAMIE RIVER Brooklyn Lake 10240 22.5 21.3 106 22.6 20.8 109 Cinnabar Park 9574 17.5 20.9 84 22.2 23.8 93 Crow Creek 8330 .3 7.0 4 9.2 10.6 87 Deadman Hill 10220 20.7 15.9 130 20.3 17.0 119 Rawah 9020 9.7 10.5 92 16.7 13.9 120 Roach 9700 16.7 16.3 102 21.0 18.9 111 ----- ----- Basin Index (%) 95 107 S. PLATTE Black Mountain 8920 11.2 -M * 13.0 -M * Crow Creek 8330 .3 7.0 4 9.2 10.6 87 Deadman Hill 10220 20.7 15.9 130 20.3 17.0 119 ----- ----- Basin Index (%) 92 107 LITTLE SNAKE RIVER Battle Mountain 7440 -M 10.1 * 16.6 14.8 112 Divide Peak 8880 15.7 19.8 79 22.0 21.1 104 Elk River 8700 12.8 19.1 67 20.2 19.7 103 Little Snake River 8915 26.8 24.6 109 38.1 29.1 131 Old Battle 10000 35.9 30.9 116 37.5 34.4 109 Sage Creek Basin 7850 6.4 12.4 52 16.5 14.2 116 Sandstone RS 8150 6.9 12.8 54 15.7 18.0 87 Whiskey Park 8950 25.0 27.1 92 29.7 27.4 108 ----- ----- Basin Index (%) 88 110 UPPER GREEN RIVER Big Sandy Opening 9080 20.6 12.5 165 23.0 13.0 177 Blind Bull Sum 8650 42.2 23.1 183 -M 19.2 * East Rim Divide 7930 15.9 10.2 156 20.6 11.5 179 Elkhart Park G.S. 9400 18.8 12.2 154 24.1 13.0 185 Gros Ventre Summit 8750 19.7 13.0 152 23.8 12.7 187 Gunsight Pass 9820 22.4 13.6 165 24.3 13.5 180 Kendall R.S. 7740 20.5 11.5 178 28.7 14.0 205 Loomis Park 8240 26.6 13.9 191 31.9 17.0 188 New Fork Lake 8340 15.9 10.3 154 17.5 10.6 165 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.3 12.3 149 26.8 14.0 191 Spring Creek Divide 9000 39.8 22.5 177 39.6 23.4 169 Triple Peak 8500 35.3 21.9 161 40.1 24.9 161 ----- ----- Basin Index (%) 167 179 LOWER GREEN RIVER Blacks Fork Jct 8869 9.6 -M * 16.0 -M * Buck Pasture 9632 17.8 -M * 23.9 -M * EF Blacks Fork GS 9360 15.4 -M * 17.3 -M * Hams Fork 7840 14.7 10.9 135 21.1 11.2 188 Hewinta 9500 9.5 11.0 86 17.1 13.8 124 Hickerson Park 9122 9.7 7.8 124 12.9 10.1 128 Hole-in-Rock 9168 7.8 7.0 111 13.5 9.5 142 Indian Creek 9425 39.5 24.5 161 -M 22.2 * Kelley R.S. 8180 25.2 14.9 169 30.0 17.8 169 Spirit Lk 10235 16.6 -M * 18.8 -M * Steel Creek Park 10158 19.1 15.6 122 21.3 16.2 131 ----- ----- Basin Index (%) 137 147 UPPER BEAR RIVER Bear River RS 8777 10.7 -M * 18.5 -M * Bug Lake 7987 31.8 18.3 174 33.6 19.1 176 Burts Miller Ranch 8000 3.8 -M * 10.0 -M * Chalk Creek #1 9171 33.4 24.1 139 36.2 24.8 146 Hayden Fork 9130 21.9 15.4 142 29.8 20.7 144 Kelley R.S. 8180 25.2 14.9 169 30.0 17.8 169 Lily Lake 9133 14.1 12.5 113 20.0 16.8 119 Monte Cristo 8932 35.8 27.4 131 38.8 25.5 152 Salt River Summit 7760 19.5 12.9 151 28.2 16.4 172 ----- ----- 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.