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: MARCH 16 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 26.4 14.3 185 37.0 18.7 198 Black Bear 8170 42.8 32.1 133 48.6 33.8 144 Blind Bull Sum 8650 40.5 20.1 201 -M 17.3 * Cottonwood Creek 7670 26.5 19.1 139 34.4 21.4 161 East Rim Divide 7930 18.6 9.5 196 19.8 10.4 190 Grand Targhee 9260 39.9 32.6 122 34.9 26.5 132 Granite Creek 6770 30.0 14.9 201 34.3 17.8 193 Grassy Lake 7265 35.9 28.7 125 49.5 32.0 155 Gros Ventre Summit 8750 -M 11.2 * -M 11.2 * Gunsight Pass 9820 20.2 11.8 171 22.1 11.9 186 Lewis Lake Divide 7850 38.3 27.3 140 49.9 31.4 159 Phillips Bench 8200 35.1 21.9 160 43.8 24.8 177 Salt River Summit 7760 20.4 11.7 174 -M 14.6 * Snake River Station 6920 -M 15.2 * 32.5 20.0 162 Spring Creek Divide 9000 36.6 20.3 180 37.0 20.9 177 Thumb Divide 7980 21.5 13.7 157 25.1 16.1 156 Togwotee Pass 9580 30.4 20.2 150 34.7 21.3 163 Two Ocean Plateau 9240 -M 23.6 * -M 23.8 * Willow Creek 8380 30.5 25.0 122 45.1 29.3 154 Younts Peak 8350 26.8 12.9 208 28.8 13.8 209 ----- ----- Basin Index (%) 155 165 MADISON-GALLATIN Black Bear 8170 42.8 32.1 133 48.6 33.8 144 Canyon 7870 16.8 11.6 145 23.4 14.3 164 Madison Plateau 7750 25.2 19.8 127 32.6 23.3 140 West Yellowstone 6700 11.8 9.9 119 20.9 12.5 167 Whiskey Creek 6800 15.0 13.7 109 24.1 17.8 135 ----- ----- Basin Index (%) 128 147 YELLOWSTONE Beartooth Lake 9360 29.4 18.7 157 25.0 17.2 145 Burnt Mtn 5880 4.9 4.4 111 11.9 10.5 113 Canyon 7870 16.8 11.6 145 23.4 14.3 164 Cole Creek 7850 9.3 11.6 80 6.7 10.3 65 Evening Star 9200 35.1 21.7 162 41.1 23.9 172 Fisher Creek 9100 39.0 27.8 140 42.2 27.9 151 Northeast Entrance 7350 11.3 8.8 128 18.1 10.7 169 Parker Peak 9400 30.2 17.2 176 -M 15.3 * Sylvan Lake 8420 22.4 17.6 127 33.8 19.5 173 Thumb Divide 7980 21.5 13.7 157 25.1 16.1 156 Two Ocean Plateau 9240 -M 23.6 * -M 23.8 * White Mill 8700 31.0 19.5 159 32.0 20.7 155 Wolverine 7650 14.4 8.8 164 19.5 10.7 182 ----- ----- Basin Index (%) 146 153 WIND RIVER Burroughs Creek 8750 25.3 -M * 25.2 -M * Castle Creek 8400 12.1 -M * 14.4 -M * Cold Springs 9630 12.1 6.1 198 14.9 8.3 180 Deer Park 9700 27.8 12.4 224 32.2 16.7 193 Hobbs Park 10100 22.4 11.2 200 20.4 10.7 191 Kirwin 9550 18.2 8.2 222 20.9 9.6 218 Little Warm 9370 15.6 9.1 171 21.3 10.8 197 Owl Creek 8975 6.9 4.5 153 8.8 4.7 187 South Pass 9040 -M 13.0 * 23.7 14.9 159 St. Lawrence Alt 8620 6.8 5.9 115 12.0 7.2 167 Togwotee Pass 9580 30.4 20.2 150 34.7 21.3 163 Townsend Creek 8700 12.3 7.8 158 15.9 9.7 164 ----- ----- Basin Index (%) 179 180 BIGHORN BASIN Bald Mtn. 9380 16.8 16.2 104 14.6 14.4 101 Bear Trap Meadow 8200 5.1 4.8 106 6.2 6.8 91 Bone Springs Div 9350 15.3 13.7 112 14.6 12.9 113 Grave Springs 8550 5.9 7.8 76 6.2 8.6 72 Kirwin 9550 18.2 8.2 222 20.9 9.6 218 Marquette 8760 7.3 -M * 11.7 -M * Middle Powder 7760 6.4 9.2 70 6.2 9.6 65 Owl Creek 8975 6.9 4.5 153 8.8 4.7 187 Powder River Pass 9480 7.0 8.8 80 10.2 10.5 97 Shell Creek 9580 14.4 12.5 115 11.5 11.5 100 Timber Creek 7950 5.3 4.2 126 6.9 5.9 117 ----- ----- Basin Index (%) 113 112 SHOSHONE RIVER Blackwater 9780 34.4 20.0 172 38.3 17.7 216 Evening Star 9200 35.1 21.7 162 41.1 23.9 172 Marquette 8760 7.3 -M * 11.7 -M * Sylvan Road 7120 14.9 10.2 146 28.1 14.9 189 Younts Peak 8350 26.8 12.9 208 28.8 13.8 209 ----- ----- Basin Index (%) 172 194 POWDER RIVER Bear Trap Meadow 8200 5.1 4.8 106 6.2 6.8 91 Cloud Peak Reservoir 9860 11.7 12.4 94 12.8 10.7 120 Grave Springs 8550 5.9 7.8 76 6.2 8.6 72 Hansen Sawmill 8360 7.0 5.4 130 9.2 6.8 135 Middle Powder 7760 6.4 9.2 70 6.2 9.6 65 Powder River Pass 9480 7.0 8.8 80 10.2 10.5 97 Soldier Park 8720 11.5 -M * 9.1 -M * ----- ----- Basin Index (%) 89 96 TONGUE RIVER Big Goose 7990 8.3 7.4 112 9.3 8.7 107 Bone Springs Div 9350 15.3 13.7 112 14.6 12.9 113 Burgess Junction 7880 8.2 9.4 87 9.1 10.1 90 Dome Lake 8880 12.3 9.8 126 12.0 11.0 109 Little Goose 8870 9.1 -M * 11.6 -M * Sucker Creek 8880 9.9 10.5 94 9.7 11.7 83 Tie Creek 6870 4.9 4.8 102 9.7 9.4 103 ----- ----- Basin Index (%) 106 101 BELLE FOURCHE Cole Canyon 5910 3.0 5.4 56 6.4 7.7 83 ----- ----- Basin Index (%) 56 83 CHEYENNE RIVER BASIN Blind Park 6890 4.5 7.1 63 7.8 10.3 76 North Rapid Creek 6130 4.8 6.4 75 6.4 8.3 77 ----- ----- Basin Index (%) 69 76 UPPER N. PLATTE Arapaho Ridge 10960 24.8 18.0 138 23.6 19.1 124 Blackhall Mtn 9820 34.8 -M * 34.7 -M * Columbine 9160 24.6 21.6 114 25.8 22.4 115 Divide Peak 8880 18.4 17.3 106 21.0 18.5 114 Joe Wright 10120 18.2 18.8 97 25.7 22.1 116 Laprele Creek 8375 11.2 8.9 126 10.4 10.4 100 Med Bow 10500 36.8 -M * 32.4 -M * North French Creek 10130 24.5 24.1 102 25.0 23.1 108 Never Summer 10280 21.4 17.4 123 17.3 -M * Old Battle 10000 35.4 26.0 136 36.3 30.6 119 Rawah 9020 11.6 9.2 126 15.1 11.7 129 Sage Creek Basin 7850 13.6 11.7 116 15.2 12.8 119 Sand Lake 10050 28.2 23.7 119 25.5 21.0 121 South Brush Creek 8440 10.0 11.2 89 11.5 12.9 89 Tower 10500 39.6 39.1 101 41.6 34.8 120 Webber Springs 9250 28.1 20.6 136 31.5 23.2 136 Willow Creek Pass 9540 16.3 10.6 154 17.1 11.4 150 Zirkel 9340 39.7 25.6 155 40.2 24.9 161 ----- ----- Basin Index (%) 120 122 SWEETWATER Deer Park 9700 27.8 12.4 224 32.2 16.7 193 Larsen Creek 9000 18.2 10.8 169 21.0 -M * South Pass 9040 -M 13.0 * 23.7 14.9 159 ----- ----- Basin Index (%) 198 177 LOWER N. PLATTE Casper Mtn. 7900 10.9 11.8 92 10.4 12.3 85 Laprele Creek 8375 11.2 8.9 126 10.4 10.4 100 Reno Hill 8400 11.0 11.6 95 11.7 12.5 94 Windy Peak 7900 9.7 6.8 143 10.0 8.8 114 ----- ----- Basin Index (%) 109 97 LARAMIE RIVER Brooklyn Lake 10240 24.2 17.4 139 21.6 17.9 121 Cinnabar Park 9574 18.4 17.8 103 20.8 21.0 99 Crow Creek 8330 4.9 7.1 69 8.1 8.6 94 Deadman Hill 10220 19.3 13.6 142 18.2 14.4 126 Rawah 9020 11.6 9.2 126 15.1 11.7 129 Roach 9700 15.3 13.6 112 18.4 16.4 112 ----- ----- Basin Index (%) 119 114 S. PLATTE Black Mountain 8920 9.4 -M * 10.5 -M * Crow Creek 8330 4.9 7.1 69 8.1 8.6 94 Deadman Hill 10220 19.3 13.6 142 18.2 14.4 126 ----- ----- Basin Index (%) 117 114 LITTLE SNAKE RIVER Battle Mountain 7440 9.1 11.0 83 15.6 13.2 118 Divide Peak 8880 18.4 17.3 106 21.0 18.5 114 Elk River 8700 19.2 17.2 112 19.1 17.5 109 Little Snake River 8915 30.4 20.6 148 36.7 26.1 141 Old Battle 10000 35.4 26.0 136 36.3 30.6 119 Sage Creek Basin 7850 13.6 11.7 116 15.2 12.8 119 Sandstone RS 8150 12.0 11.6 103 15.3 16.3 94 Whiskey Park 8950 27.3 23.9 114 28.3 24.4 116 ----- ----- Basin Index (%) 119 118 UPPER GREEN RIVER Big Sandy Opening 9080 20.1 11.2 179 21.7 11.5 189 Blind Bull Sum 8650 40.5 20.1 201 -M 17.3 * East Rim Divide 7930 18.6 9.5 196 19.8 10.4 190 Elkhart Park G.S. 9400 17.9 10.4 172 22.1 11.5 192 Gros Ventre Summit 8750 -M 11.2 * -M 11.2 * Gunsight Pass 9820 20.2 11.8 171 22.1 11.9 186 Kendall R.S. 7740 23.2 11.0 211 27.5 12.7 217 Loomis Park 8240 26.8 13.1 205 30.5 15.2 201 New Fork Lake 8340 16.0 9.2 174 16.4 9.5 173 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.2 10.8 178 25.4 12.5 203 Spring Creek Divide 9000 36.6 20.3 180 37.0 20.9 177 Triple Peak 8500 35.1 19.1 184 37.6 22.1 170 ----- ----- Basin Index (%) 187 188 LOWER GREEN RIVER Blacks Fork Jct 8869 -M -M * -M -M * Buck Pasture 9632 -M -M * -M -M * EF Blacks Fork GS 9360 15.4 -M * 11.8 -M * Hams Fork 7840 16.5 10.1 163 18.3 9.9 185 Hewinta 9500 10.0 9.2 109 14.2 12.0 118 Hickerson Park 9122 7.5 6.6 114 8.5 8.5 100 Hole-in-Rock 9168 6.0 6.4 94 9.2 8.0 115 Indian Creek 9425 37.2 20.8 179 -M 19.5 * Kelley R.S. 8180 24.9 13.0 192 28.4 15.8 180 Spirit Lk 10235 13.3 -M * 14.7 -M * Steel Creek Park 10158 15.4 13.1 118 17.1 13.9 123 ----- ----- Basin Index (%) 148 141 UPPER BEAR RIVER Bear River RS 8777 11.0 -M * 15.5 -M * Bug Lake 7987 30.1 16.4 184 30.0 17.0 176 Burts Miller Ranch 8000 6.2 -M * 8.4 -M * Chalk Creek #1 9171 31.2 20.5 152 -M 21.6 * Hayden Fork 9130 21.6 14.0 154 26.7 18.1 148 Kelley R.S. 8180 24.9 13.0 192 28.4 15.8 180 Lily Lake 9133 13.9 11.4 122 16.9 14.6 116 Monte Cristo 8932 33.8 23.7 143 34.7 22.6 154 Salt River Summit 7760 20.4 11.7 174 -M 14.6 * ----- ----- Basin Index (%) 159 155 ----------------------------------------------------------------------------- -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.