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 SUNDAY: MARCH 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 24.5 13.7 179 31.8 17.6 181 Black Bear 8170 37.9 30.3 125 44.4 31.8 140 Blind Bull Sum 8650 37.3 18.5 202 -M 16.4 * Cottonwood Creek 7670 25.0 17.6 142 32.0 20.1 159 East Rim Divide 7930 17.5 8.7 201 19.0 9.8 194 Grand Targhee 9260 36.5 30.8 119 32.8 25.3 130 Granite Creek 6770 28.3 14.1 201 -M 16.9 * Grassy Lake 7265 32.7 26.7 122 45.8 30.2 152 Gros Ventre Summit 8750 -M 10.3 * -M 10.4 * Gunsight Pass 9820 18.0 10.9 165 20.8 11.1 187 Lewis Lake Divide 7850 33.3 25.5 131 42.4 29.7 143 Phillips Bench 8200 31.4 20.2 155 39.3 23.4 168 Salt River Summit 7760 19.2 10.8 178 25.0 13.8 181 Snake River Station 6920 20.3 14.5 140 30.3 19.1 159 Spring Creek Divide 9000 33.8 19.1 177 -M 19.7 * Thumb Divide 7980 20.2 12.5 162 21.7 15.1 144 Togwotee Pass 9580 27.9 18.6 150 32.0 19.9 161 Two Ocean Plateau 9240 -M 21.9 * -M 22.3 * Willow Creek 8380 28.3 23.1 123 42.1 27.5 153 Younts Peak 8350 23.1 11.9 194 25.8 12.9 200 ----- ----- Basin Index (%) 151 158 MADISON-GALLATIN Black Bear 8170 37.9 30.3 125 44.4 31.8 140 Canyon 7870 15.4 10.9 141 21.6 13.4 161 Madison Plateau 7750 23.0 18.2 126 30.8 21.9 141 West Yellowstone 6700 11.9 9.1 131 19.9 11.9 167 Whiskey Creek 6800 14.1 12.3 115 22.7 16.7 136 ----- ----- Basin Index (%) 127 146 YELLOWSTONE Beartooth Lake 9360 25.9 17.5 148 21.5 16.1 134 Burnt Mtn 5880 5.3 4.2 126 11.2 9.7 115 Canyon 7870 15.4 10.9 141 21.6 13.4 161 Cole Creek 7850 8.4 10.5 80 6.3 9.3 68 Evening Star 9200 30.9 19.8 156 34.1 22.6 151 Fisher Creek 9100 33.1 26.2 126 37.4 26.2 143 Northeast Entrance 7350 10.4 8.5 122 16.1 10.1 159 Parker Peak 9400 26.8 16.3 164 23.4 14.4 162 Sylvan Lake 8420 20.5 16.3 126 31.6 18.4 172 Thumb Divide 7980 20.2 12.5 162 21.7 15.1 144 Two Ocean Plateau 9240 -M 21.9 * -M 22.3 * White Mill 8700 25.4 18.7 136 27.2 19.5 139 Wolverine 7650 13.3 8.7 153 17.9 10.2 175 ----- ----- Basin Index (%) 139 146 WIND RIVER Burroughs Creek 8750 20.7 -M * 22.8 -M * Castle Creek 8400 11.4 -M * 13.6 -M * Cold Springs 9630 11.8 5.6 211 14.2 7.7 184 Deer Park 9700 27.9 11.1 251 29.9 15.6 192 Hobbs Park 10100 21.7 10.2 213 20.0 9.8 204 Kirwin 9550 16.3 7.3 223 19.0 9.0 211 Little Warm 9370 14.1 8.2 172 19.6 10.1 194 Owl Creek 8975 6.9 4.0 172 8.5 4.4 193 South Pass 9040 25.5 11.9 214 23.1 13.9 166 St. Lawrence Alt 8620 7.4 5.5 135 11.9 6.7 178 Togwotee Pass 9580 27.9 18.6 150 32.0 19.9 161 Townsend Creek 8700 12.4 6.9 180 15.6 9.0 173 ----- ----- Basin Index (%) 192 183 BIGHORN BASIN Bald Mtn. 9380 15.4 15.3 101 13.5 13.4 101 Bear Trap Meadow 8200 4.5 4.5 100 5.8 6.3 92 Bone Springs Div 9350 13.6 12.7 107 13.3 12.0 111 Grave Springs 8550 5.1 7.1 72 5.8 8.1 72 Kirwin 9550 16.3 7.3 223 19.0 9.0 211 Marquette 8760 7.3 -M * 11.1 -M * Middle Powder 7760 6.0 8.4 71 6.0 9.0 67 Owl Creek 8975 6.9 4.0 172 8.5 4.4 193 Powder River Pass 9480 6.2 8.1 77 9.2 9.8 94 Shell Creek 9580 13.1 12.0 109 10.3 10.8 95 Timber Creek 7950 5.3 3.9 136 6.6 5.4 122 ----- ----- Basin Index (%) 111 111 SHOSHONE RIVER Blackwater 9780 30.1 17.9 168 33.8 16.5 205 Evening Star 9200 30.9 19.8 156 34.1 22.6 151 Marquette 8760 7.3 -M * 11.1 -M * Sylvan Road 7120 13.9 9.8 142 25.6 14.2 180 Younts Peak 8350 23.1 11.9 194 25.8 12.9 200 ----- ----- Basin Index (%) 165 180 POWDER RIVER Bear Trap Meadow 8200 4.5 4.5 100 5.8 6.3 92 Cloud Peak Reservoir 9860 10.1 10.8 94 11.6 9.8 118 Grave Springs 8550 5.1 7.1 72 5.8 8.1 72 Hansen Sawmill 8360 6.7 4.8 140 8.6 6.2 139 Middle Powder 7760 6.0 8.4 71 6.0 9.0 67 Powder River Pass 9480 6.2 8.1 77 9.2 9.8 94 Soldier Park 8720 10.0 -M * 8.6 -M * ----- ----- Basin Index (%) 88 96 TONGUE RIVER Big Goose 7990 7.3 6.4 114 8.3 8.0 104 Bone Springs Div 9350 13.6 12.7 107 13.3 12.0 111 Burgess Junction 7880 7.5 8.7 86 8.6 9.3 92 Dome Lake 8880 9.8 8.9 110 10.7 10.2 105 Little Goose 8870 7.8 -M * 10.3 -M * Sucker Creek 8880 8.8 9.4 94 8.9 10.9 82 Tie Creek 6870 5.0 4.5 111 9.1 8.7 105 ----- ----- Basin Index (%) 103 100 BELLE FOURCHE Cole Canyon 5910 3.0 4.9 61 5.9 7.2 82 ----- ----- Basin Index (%) 61 82 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.5 66 6.8 9.6 71 North Rapid Creek 6130 4.6 6.0 77 5.9 7.8 76 ----- ----- Basin Index (%) 71 73 UPPER N. PLATTE Arapaho Ridge 10960 22.7 17.1 133 22.9 18.1 127 Blackhall Mtn 9820 33.4 -M * 31.9 -M * Columbine 9160 23.5 20.4 115 24.9 20.7 120 Divide Peak 8880 18.0 16.4 110 20.2 17.2 117 Joe Wright 10120 17.9 17.4 103 25.0 20.5 122 Laprele Creek 8375 10.6 7.9 134 10.0 9.6 104 Med Bow 10500 34.0 -M * 30.6 -M * North French Creek 10130 22.7 21.4 106 23.5 21.4 110 Never Summer 10280 20.7 16.4 126 17.0 -M * Old Battle 10000 33.6 24.5 137 34.5 28.5 121 Rawah 9020 11.8 8.9 133 14.8 11.2 132 Sage Creek Basin 7850 15.0 10.8 139 14.7 12.0 122 Sand Lake 10050 26.2 21.5 122 24.2 19.4 125 South Brush Creek 8440 10.2 10.7 95 10.9 12.0 91 Tower 10500 38.2 37.2 103 39.0 32.7 119 Webber Springs 9250 26.5 19.2 138 30.1 21.6 139 Willow Creek Pass 9540 16.0 9.8 163 16.8 10.6 158 Zirkel 9340 38.3 23.9 160 38.3 23.6 162 ----- ----- Basin Index (%) 124 125 SWEETWATER Deer Park 9700 27.9 11.1 251 29.9 15.6 192 Larsen Creek 9000 18.2 9.8 186 20.6 -M * South Pass 9040 25.5 11.9 214 23.1 13.9 166 ----- ----- Basin Index (%) 218 180 LOWER N. PLATTE Casper Mtn. 7900 9.6 10.7 90 9.1 11.4 80 Laprele Creek 8375 10.6 7.9 134 10.0 9.6 104 Reno Hill 8400 10.0 10.7 93 10.4 11.4 91 Windy Peak 7900 9.2 6.0 153 9.6 8.0 120 ----- ----- Basin Index (%) 112 97 LARAMIE RIVER Brooklyn Lake 10240 22.2 15.7 141 19.9 16.5 121 Cinnabar Park 9574 17.3 17.5 99 19.8 19.9 99 Crow Creek 8330 4.7 6.9 68 7.5 8.0 94 Deadman Hill 10220 18.5 12.6 147 17.8 13.2 135 Rawah 9020 11.8 8.9 133 14.8 11.2 132 Roach 9700 15.1 12.7 119 17.9 15.1 119 ----- ----- Basin Index (%) 121 116 S. PLATTE Black Mountain 8920 9.2 -M * 10.3 -M * Crow Creek 8330 4.7 6.9 68 7.5 8.0 94 Deadman Hill 10220 18.5 12.6 147 17.8 13.2 135 ----- ----- Basin Index (%) 119 119 LITTLE SNAKE RIVER Battle Mountain 7440 10.9 10.1 108 14.8 12.3 120 Divide Peak 8880 18.0 16.4 110 20.2 17.2 117 Elk River 8700 19.9 16.2 123 18.8 16.3 115 Little Snake River 8915 29.9 20.0 150 33.9 25.2 135 Old Battle 10000 33.6 24.5 137 34.5 28.5 121 Sage Creek Basin 7850 15.0 10.8 139 14.7 12.0 122 Sandstone RS 8150 12.0 11.1 108 14.7 15.4 95 Whiskey Park 8950 25.6 22.2 115 27.1 22.8 119 ----- ----- Basin Index (%) 126 119 UPPER GREEN RIVER Big Sandy Opening 9080 19.3 10.4 186 20.8 10.8 193 Blind Bull Sum 8650 37.3 18.5 202 -M 16.4 * East Rim Divide 7930 17.5 8.7 201 19.0 9.8 194 Elkhart Park G.S. 9400 16.4 9.7 169 20.8 10.8 193 Gros Ventre Summit 8750 -M 10.3 * -M 10.4 * Gunsight Pass 9820 18.0 10.9 165 20.8 11.1 187 Kendall R.S. 7740 21.2 10.0 212 24.5 12.0 204 Loomis Park 8240 24.7 12.2 202 27.6 14.4 192 New Fork Lake 8340 15.0 8.4 179 15.2 8.9 171 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 19.1 10.1 189 24.0 11.8 203 Spring Creek Divide 9000 33.8 19.1 177 -M 19.7 * Triple Peak 8500 33.1 17.6 188 34.9 20.8 168 ----- ----- Basin Index (%) 188 188 LOWER GREEN RIVER Blacks Fork Jct 8869 10.4 -M * 13.1 -M * Buck Pasture 9632 17.9 -M * 19.6 -M * EF Blacks Fork GS 9360 14.3 -M * -M -M * Hams Fork 7840 16.5 9.6 172 17.8 9.4 189 Hewinta 9500 12.2 8.2 149 13.6 11.1 123 Hickerson Park 9122 8.2 6.1 134 8.4 7.8 108 Hole-in-Rock 9168 6.8 5.8 117 8.9 7.3 122 Indian Creek 9425 34.7 19.4 179 -M 18.4 * Kelley R.S. 8180 24.1 12.3 196 27.1 14.9 182 Spirit Lk 10235 13.5 -M * 14.5 -M * Steel Creek Park 10158 14.8 12.0 123 16.4 12.8 128 ----- ----- Basin Index (%) 160 146 UPPER BEAR RIVER Bear River RS 8777 12.5 -M * 14.9 -M * Bug Lake 7987 28.6 15.3 187 27.9 15.9 175 Burts Miller Ranch 8000 7.6 -M * 8.0 -M * Chalk Creek #1 9171 30.6 18.8 163 31.2 20.1 155 Hayden Fork 9130 22.3 12.4 180 -M 16.8 * Kelley R.S. 8180 24.1 12.3 196 27.1 14.9 182 Lily Lake 9133 14.2 10.6 134 16.5 13.6 121 Monte Cristo 8932 31.8 21.9 145 30.3 21.0 144 Salt River Summit 7760 19.2 10.8 178 25.0 13.8 181 ----- ----- Basin Index (%) 167 159 ----------------------------------------------------------------------------- -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.