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: MARCH 4 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.3 13.6 179 31.8 17.5 182 Black Bear 8170 37.8 30.1 126 44.4 31.6 141 Blind Bull Sum 8650 37.2 18.3 203 -M 16.3 * Cottonwood Creek 7670 25.1 17.4 144 31.9 19.9 160 East Rim Divide 7930 17.4 8.5 205 18.9 9.7 195 Grand Targhee 9260 36.3 30.6 119 32.5 25.2 129 Granite Creek 6770 28.1 14.0 201 -M 16.8 * Grassy Lake 7265 32.7 26.6 123 45.8 30.0 153 Gros Ventre Summit 8750 -M 10.1 * -M 10.3 * Gunsight Pass 9820 18.0 10.8 167 20.7 11.0 188 Lewis Lake Divide 7850 33.4 25.4 131 42.5 29.4 145 Phillips Bench 8200 31.3 20.0 156 39.3 23.2 169 Salt River Summit 7760 19.2 10.7 179 24.8 13.7 181 Snake River Station 6920 20.2 14.4 140 30.3 18.9 160 Spring Creek Divide 9000 33.8 19.0 178 -M 19.6 * Thumb Divide 7980 20.2 12.4 163 -M 15.0 * Togwotee Pass 9580 27.9 18.3 152 32.0 19.8 162 Two Ocean Plateau 9240 -M 21.8 * -M 22.1 * Willow Creek 8380 28.5 22.9 124 42.0 27.3 154 Younts Peak 8350 22.9 11.8 194 25.6 12.9 198 ----- ----- Basin Index (%) 152 159 MADISON-GALLATIN Black Bear 8170 37.8 30.1 126 44.4 31.6 141 Canyon 7870 15.3 10.8 142 21.6 13.3 162 Madison Plateau 7750 23.0 18.1 127 30.8 21.7 142 West Yellowstone 6700 11.9 9.1 131 19.9 11.9 167 Whiskey Creek 6800 14.1 12.2 116 22.7 16.6 137 ----- ----- Basin Index (%) 127 147 YELLOWSTONE Beartooth Lake 9360 25.9 17.3 150 21.4 16.0 134 Burnt Mtn 5880 5.3 4.1 129 11.2 9.7 115 Canyon 7870 15.3 10.8 142 21.6 13.3 162 Cole Creek 7850 8.5 10.4 82 6.3 9.3 68 Evening Star 9200 30.9 19.6 158 -M 22.5 * Fisher Creek 9100 33.0 26.1 126 37.4 26.0 144 Northeast Entrance 7350 10.4 8.4 124 16.0 10.0 160 Parker Peak 9400 26.8 16.2 165 23.4 14.3 164 Sylvan Lake 8420 20.5 16.1 127 31.7 18.3 173 Thumb Divide 7980 20.2 12.4 163 -M 15.0 * Two Ocean Plateau 9240 -M 21.8 * -M 22.1 * White Mill 8700 25.4 18.6 137 27.2 19.3 141 Wolverine 7650 13.5 8.6 157 17.8 10.1 176 ----- ----- Basin Index (%) 140 146 WIND RIVER Burroughs Creek 8750 20.6 -M * 22.8 -M * Castle Creek 8400 11.3 -M * 13.4 -M * Cold Springs 9630 11.8 5.6 211 14.1 7.6 186 Deer Park 9700 27.9 10.9 256 29.7 15.5 192 Hobbs Park 10100 21.7 10.0 217 19.9 9.7 205 Kirwin 9550 16.0 7.2 222 18.9 8.9 212 Little Warm 9370 14.0 8.2 171 19.6 10.0 196 Owl Creek 8975 6.8 4.0 170 8.5 4.4 193 South Pass 9040 25.6 11.8 217 23.1 13.7 169 St. Lawrence Alt 8620 7.4 5.4 137 11.9 6.6 180 Togwotee Pass 9580 27.9 18.3 152 32.0 19.8 162 Townsend Creek 8700 12.4 6.8 182 15.5 8.8 176 ----- ----- Basin Index (%) 194 184 BIGHORN BASIN Bald Mtn. 9380 15.4 15.2 101 13.5 13.3 102 Bear Trap Meadow 8200 4.6 4.5 102 5.7 6.3 90 Bone Springs Div 9350 13.6 12.5 109 13.4 12.0 112 Grave Springs 8550 5.1 7.1 72 5.8 8.0 72 Kirwin 9550 16.0 7.2 222 18.9 8.9 212 Marquette 8760 7.3 -M * 11.1 -M * Middle Powder 7760 6.0 8.3 72 6.1 8.9 69 Owl Creek 8975 6.8 4.0 170 8.5 4.4 193 Powder River Pass 9480 6.2 8.1 77 9.1 9.8 93 Shell Creek 9580 13.1 11.9 110 10.3 10.8 95 Timber Creek 7950 5.3 3.9 136 6.6 5.4 122 ----- ----- Basin Index (%) 111 112 SHOSHONE RIVER Blackwater 9780 30.0 17.7 169 33.4 16.4 204 Evening Star 9200 30.9 19.6 158 -M 22.5 * Marquette 8760 7.3 -M * 11.1 -M * Sylvan Road 7120 14.2 9.7 146 25.7 14.1 182 Younts Peak 8350 22.9 11.8 194 25.6 12.9 198 ----- ----- Basin Index (%) 167 195 POWDER RIVER Bear Trap Meadow 8200 4.6 4.5 102 5.7 6.3 90 Cloud Peak Reservoir 9860 10.1 10.6 95 11.6 9.8 118 Grave Springs 8550 5.1 7.1 72 5.8 8.0 72 Hansen Sawmill 8360 6.8 4.7 145 8.7 6.2 140 Middle Powder 7760 6.0 8.3 72 6.1 8.9 69 Powder River Pass 9480 6.2 8.1 77 9.1 9.8 93 Soldier Park 8720 10.2 -M * 8.6 -M * ----- ----- Basin Index (%) 90 96 TONGUE RIVER Big Goose 7990 7.3 6.3 116 8.2 8.0 102 Bone Springs Div 9350 13.6 12.5 109 13.4 12.0 112 Burgess Junction 7880 7.5 8.6 87 8.6 9.2 93 Dome Lake 8880 9.8 8.8 111 10.7 10.1 106 Little Goose 8870 7.9 -M * 10.3 -M * Sucker Creek 8880 8.9 9.2 97 8.8 10.8 81 Tie Creek 6870 5.1 4.4 116 9.1 8.6 106 ----- ----- Basin Index (%) 105 100 BELLE FOURCHE Cole Canyon 5910 3.0 4.9 61 5.8 7.2 81 ----- ----- Basin Index (%) 61 81 CHEYENNE RIVER BASIN Blind Park 6890 4.2 6.4 66 6.8 9.6 71 North Rapid Creek 6130 4.6 6.0 77 5.9 7.7 77 ----- ----- Basin Index (%) 71 73 UPPER N. PLATTE Arapaho Ridge 10960 22.6 17.0 133 22.8 18.0 127 Blackhall Mtn 9820 33.4 -M * 31.7 -M * Columbine 9160 22.7 20.2 112 24.7 20.6 120 Divide Peak 8880 18.0 16.3 110 20.3 17.0 119 Joe Wright 10120 17.9 17.1 105 25.0 20.2 124 Laprele Creek 8375 10.5 7.8 135 9.9 9.5 104 Med Bow 10500 34.0 -M * 30.5 -M * North French Creek 10130 22.6 21.3 106 23.4 21.3 110 Never Summer 10280 20.7 16.3 127 16.9 -M * Old Battle 10000 33.6 24.3 138 32.0 28.3 113 Rawah 9020 12.0 8.9 135 14.7 11.1 132 Sage Creek Basin 7850 15.0 10.7 140 14.7 11.9 124 Sand Lake 10050 26.1 21.4 122 24.1 19.1 126 South Brush Creek 8440 10.3 10.6 97 10.8 11.9 91 Tower 10500 38.2 36.9 104 38.6 32.4 119 Webber Springs 9250 26.3 19.0 138 30.2 21.4 141 Willow Creek Pass 9540 16.0 9.7 165 16.8 10.5 160 Zirkel 9340 38.2 23.6 162 37.3 23.6 158 ----- ----- Basin Index (%) 125 125 SWEETWATER Deer Park 9700 27.9 10.9 256 29.7 15.5 192 Larsen Creek 9000 18.2 9.8 186 20.6 -M * South Pass 9040 25.6 11.8 217 23.1 13.7 169 ----- ----- Basin Index (%) 221 181 LOWER N. PLATTE Casper Mtn. 7900 9.5 10.6 90 9.0 11.3 80 Laprele Creek 8375 10.5 7.8 135 9.9 9.5 104 Reno Hill 8400 10.1 10.5 96 10.3 11.3 91 Windy Peak 7900 9.2 5.9 156 9.6 7.9 122 ----- ----- Basin Index (%) 113 97 LARAMIE RIVER Brooklyn Lake 10240 22.1 15.5 143 19.9 16.3 122 Cinnabar Park 9574 17.4 17.4 100 19.8 19.8 100 Crow Creek 8330 4.7 6.8 69 7.4 7.9 94 Deadman Hill 10220 18.4 12.6 146 17.7 13.0 136 Rawah 9020 12.0 8.9 135 14.7 11.1 132 Roach 9700 15.1 12.6 120 17.9 14.9 120 ----- ----- Basin Index (%) 122 117 S. PLATTE Black Mountain 8920 9.2 -M * 10.3 -M * Crow Creek 8330 4.7 6.8 69 7.4 7.9 94 Deadman Hill 10220 18.4 12.6 146 17.7 13.0 136 ----- ----- Basin Index (%) 119 120 LITTLE SNAKE RIVER Battle Mountain 7440 11.0 10.0 110 14.7 12.3 120 Divide Peak 8880 18.0 16.3 110 20.3 17.0 119 Elk River 8700 19.7 16.0 123 18.8 16.2 116 Little Snake River 8915 29.9 19.9 150 33.6 25.2 133 Old Battle 10000 33.6 24.3 138 32.0 28.3 113 Sage Creek Basin 7850 15.0 10.7 140 14.7 11.9 124 Sandstone RS 8150 12.1 10.9 111 14.7 15.3 96 Whiskey Park 8950 25.5 22.0 116 27.0 22.7 119 ----- ----- Basin Index (%) 127 118 UPPER GREEN RIVER Big Sandy Opening 9080 19.2 10.3 186 20.7 10.7 193 Blind Bull Sum 8650 37.2 18.3 203 -M 16.3 * East Rim Divide 7930 17.4 8.5 205 18.9 9.7 195 Elkhart Park G.S. 9400 16.3 9.6 170 20.6 10.7 193 Gros Ventre Summit 8750 -M 10.1 * -M 10.3 * Gunsight Pass 9820 18.0 10.8 167 20.7 11.0 188 Kendall R.S. 7740 21.0 9.9 212 24.4 11.9 205 Loomis Park 8240 24.5 12.0 204 27.5 14.3 192 New Fork Lake 8340 15.0 8.4 179 15.2 8.9 171 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.0 10.0 190 23.8 11.7 203 Spring Creek Divide 9000 33.8 19.0 178 -M 19.6 * Triple Peak 8500 33.1 17.4 190 34.9 20.6 169 ----- ----- Basin Index (%) 190 189 LOWER GREEN RIVER Blacks Fork Jct 8869 10.4 -M * 13.1 -M * Buck Pasture 9632 17.8 -M * 19.3 -M * EF Blacks Fork GS 9360 14.5 -M * -M -M * Hams Fork 7840 16.2 9.5 171 17.8 9.3 191 Hewinta 9500 12.2 8.1 151 13.4 11.0 122 Hickerson Park 9122 8.1 6.1 133 8.3 7.7 108 Hole-in-Rock 9168 6.8 5.7 119 8.9 7.2 124 Indian Creek 9425 34.6 19.2 180 -M 18.2 * Kelley R.S. 8180 24.1 12.2 198 27.0 14.8 182 Spirit Lk 10235 13.7 -M * 14.5 -M * Steel Creek Park 10158 14.8 11.8 125 16.4 12.6 130 ----- ----- Basin Index (%) 161 147 UPPER BEAR RIVER Bear River RS 8777 12.5 -M * 14.9 -M * Bug Lake 7987 28.5 15.2 188 27.8 15.8 176 Burts Miller Ranch 8000 7.6 -M * 8.0 -M * Chalk Creek #1 9171 30.6 18.7 164 31.1 19.9 156 Hayden Fork 9130 22.3 12.4 180 -M 16.7 * Kelley R.S. 8180 24.1 12.2 198 27.0 14.8 182 Lily Lake 9133 14.4 10.6 136 16.6 13.5 123 Monte Cristo 8932 31.8 21.7 147 30.1 20.9 144 Salt River Summit 7760 19.2 10.7 179 24.8 13.7 181 ----- ----- Basin Index (%) 168 160 ----------------------------------------------------------------------------- -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.