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 TUESDAY: MARCH 28 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.2 14.7 165 38.1 19.8 192 Black Bear 8170 43.3 35.0 124 51.0 35.9 142 Blind Bull Sum 8650 41.8 21.5 194 -M 18.4 * Cottonwood Creek 7670 26.5 20.8 127 35.9 23.1 155 East Rim Divide 7930 17.6 9.8 180 20.6 11.1 186 Grand Targhee 9260 42.4 35.0 121 38.4 28.5 135 Granite Creek 6770 28.1 14.9 189 35.0 18.8 186 Grassy Lake 7265 35.0 31.0 113 52.0 34.0 153 Gros Ventre Summit 8750 -M 12.4 * -M 12.0 * Gunsight Pass 9820 20.8 13.0 160 23.1 12.8 180 Lewis Lake Divide 7850 42.0 29.2 144 53.1 33.4 159 Phillips Bench 8200 35.7 23.6 151 45.0 26.5 170 Salt River Summit 7760 19.6 12.6 156 -M 15.7 * Snake River Station 6920 19.1 15.9 120 34.2 21.3 161 Spring Creek Divide 9000 38.6 22.3 173 38.6 22.5 172 Thumb Divide 7980 22.8 15.1 151 26.9 17.4 155 Togwotee Pass 9580 31.9 21.4 149 36.5 22.8 160 Two Ocean Plateau 9240 -M 25.2 * -M 25.6 * Willow Creek 8380 28.3 26.6 106 46.7 31.4 149 Younts Peak 8350 25.2 13.9 181 30.2 14.8 204 ----- ----- Basin Index (%) 144 162 MADISON-GALLATIN Black Bear 8170 43.3 35.0 124 51.0 35.9 142 Canyon 7870 16.9 12.2 139 24.5 15.1 162 Madison Plateau 7750 25.8 21.0 123 34.4 24.7 139 West Yellowstone 6700 8.8 10.1 87 22.1 13.1 169 Whiskey Creek 6800 13.5 14.7 92 25.5 19.0 134 ----- ----- Basin Index (%) 116 146 YELLOWSTONE Beartooth Lake 9360 31.0 20.5 151 26.5 18.4 144 Burnt Mtn 5880 1.1 4.6 24 12.7 11.5 110 Canyon 7870 16.9 12.2 139 24.5 15.1 162 Cole Creek 7850 9.9 12.9 77 6.9 11.6 59 Evening Star 9200 36.7 23.6 156 43.1 25.5 169 Fisher Creek 9100 42.3 29.2 145 45.2 29.8 152 Northeast Entrance 7350 9.6 9.7 99 19.8 11.4 174 Parker Peak 9400 32.1 18.4 174 32.6 16.4 199 Sylvan Lake 8420 22.5 18.8 120 35.5 20.8 171 Thumb Divide 7980 22.8 15.1 151 26.9 17.4 155 Two Ocean Plateau 9240 -M 25.2 * -M 25.6 * White Mill 8700 34.1 21.2 161 34.5 22.2 155 Wolverine 7650 7.6 8.9 85 20.2 11.4 177 ----- ----- Basin Index (%) 137 155 WIND RIVER Burroughs Creek 8750 23.1 -M * 26.3 -M * Castle Creek 8400 10.8 -M * 14.6 -M * Cold Springs 9630 12.8 7.0 183 15.8 9.1 174 Deer Park 9700 29.0 14.3 203 34.1 18.0 189 Hobbs Park 10100 23.9 12.9 185 22.2 12.0 185 Kirwin 9550 20.1 9.0 223 22.2 10.6 209 Little Warm 9370 16.6 10.0 166 22.2 11.9 187 Owl Creek 8975 7.3 5.0 146 9.8 5.4 181 South Pass 9040 27.5 14.5 190 24.6 16.1 153 St. Lawrence Alt 8620 6.0 6.6 91 13.2 8.1 163 Togwotee Pass 9580 31.9 21.4 149 36.5 22.8 160 Townsend Creek 8700 13.3 8.8 151 17.2 10.8 159 ----- ----- Basin Index (%) 172 175 BIGHORN BASIN Bald Mtn. 9380 18.1 17.5 103 15.6 15.7 99 Bear Trap Meadow 8200 4.1 5.1 80 7.0 7.6 92 Bone Springs Div 9350 17.4 14.9 117 16.2 14.2 114 Grave Springs 8550 6.2 8.5 73 6.7 9.5 71 Kirwin 9550 20.1 9.0 223 22.2 10.6 209 Marquette 8760 8.5 -M * 12.8 -M * Middle Powder 7760 6.3 10.7 59 6.3 10.6 59 Owl Creek 8975 7.3 5.0 146 9.8 5.4 181 Powder River Pass 9480 7.4 9.7 76 11.2 11.5 97 Shell Creek 9580 15.9 13.9 114 13.0 12.6 103 Timber Creek 7950 5.0 4.4 114 8.2 6.6 124 ----- ----- Basin Index (%) 109 111 SHOSHONE RIVER Blackwater 9780 36.3 21.5 169 40.1 19.1 210 Evening Star 9200 36.7 23.6 156 43.1 25.5 169 Marquette 8760 8.5 -M * 12.8 -M * Sylvan Road 7120 10.6 11.0 96 29.6 15.7 189 Younts Peak 8350 25.2 13.9 181 30.2 14.8 204 ----- ----- Basin Index (%) 155 190 POWDER RIVER Bear Trap Meadow 8200 4.1 5.1 80 7.0 7.6 92 Cloud Peak Reservoir 9860 13.1 13.6 96 14.5 12.0 121 Grave Springs 8550 6.2 8.5 73 6.7 9.5 71 Hansen Sawmill 8360 8.5 6.1 139 11.0 7.8 141 Middle Powder 7760 6.3 10.7 59 6.3 10.6 59 Powder River Pass 9480 7.4 9.7 76 11.2 11.5 97 Soldier Park 8720 12.3 -M * 10.9 -M * ----- ----- Basin Index (%) 85 96 TONGUE RIVER Big Goose 7990 9.5 8.4 113 11.2 9.8 114 Bone Springs Div 9350 17.4 14.9 117 16.2 14.2 114 Burgess Junction 7880 9.3 10.7 87 10.3 11.2 92 Dome Lake 8880 13.9 11.1 125 13.9 12.3 113 Little Goose 8870 10.6 -M * 13.8 -M * Sucker Creek 8880 11.0 11.2 98 11.1 13.0 85 Tie Creek 6870 2.9 5.4 54 11.2 10.3 109 ----- ----- Basin Index (%) 104 104 BELLE FOURCHE Cole Canyon 5910 .0 5.7 0 6.8 8.4 81 ----- ----- Basin Index (%) 0 81 CHEYENNE RIVER BASIN Blind Park 6890 .0 7.1 0 8.2 10.9 75 North Rapid Creek 6130 1.7 6.7 25 6.9 9.0 77 ----- ----- Basin Index (%) 12 76 UPPER N. PLATTE Arapaho Ridge 10960 23.2 19.1 121 24.2 20.6 117 Blackhall Mtn 9820 34.7 -M * 35.9 -M * Columbine 9160 19.4 22.1 88 26.3 23.8 111 Divide Peak 8880 15.0 18.9 79 21.1 19.9 106 Joe Wright 10120 17.1 19.8 86 26.5 24.0 110 Laprele Creek 8375 10.0 9.4 106 10.9 11.4 96 Med Bow 10500 36.8 -M * 33.4 -M * North French Creek 10130 23.4 27.1 86 26.0 25.0 104 Never Summer 10280 21.1 18.9 112 18.0 -M * Old Battle 10000 35.4 28.4 125 36.5 32.7 112 Rawah 9020 9.3 10.1 92 15.8 13.0 122 Sage Creek Basin 7850 7.3 12.3 59 15.4 13.4 115 Sand Lake 10050 29.0 26.4 110 25.9 22.9 113 South Brush Creek 8440 5.9 12.0 49 11.8 14.1 84 Tower 10500 39.1 42.3 92 41.9 37.3 112 Webber Springs 9250 25.3 22.5 112 31.8 24.9 128 Willow Creek Pass 9540 16.7 11.5 145 17.5 12.3 142 Zirkel 9340 33.1 26.0 127 40.4 26.7 151 ----- ----- Basin Index (%) 101 116 SWEETWATER Deer Park 9700 29.0 14.3 203 34.1 18.0 189 Larsen Creek 9000 16.7 11.9 140 22.0 -M * South Pass 9040 27.5 14.5 190 24.6 16.1 153 ----- ----- Basin Index (%) 180 172 LOWER N. PLATTE Casper Mtn. 7900 9.2 12.8 72 10.6 13.5 79 Laprele Creek 8375 10.0 9.4 106 10.9 11.4 96 Reno Hill 8400 11.0 12.7 87 12.5 14.0 89 Windy Peak 7900 8.0 7.7 104 10.6 9.7 109 ----- ----- Basin Index (%) 90 92 LARAMIE RIVER Brooklyn Lake 10240 22.5 18.9 119 21.8 19.5 112 Cinnabar Park 9574 16.8 19.5 86 21.2 22.6 94 Crow Creek 8330 .3 6.9 4 8.4 9.8 86 Deadman Hill 10220 19.7 14.9 132 18.9 15.9 119 Rawah 9020 9.3 10.1 92 15.8 13.0 122 Roach 9700 15.1 14.9 101 19.1 17.8 107 ----- ----- Basin Index (%) 98 107 S. PLATTE Black Mountain 8920 9.5 -M * 11.2 -M * Crow Creek 8330 .3 6.9 4 8.4 9.8 86 Deadman Hill 10220 19.7 14.9 132 18.9 15.9 119 ----- ----- Basin Index (%) 92 106 LITTLE SNAKE RIVER Battle Mountain 7440 3.3 10.9 30 16.0 14.1 113 Divide Peak 8880 15.0 18.9 79 21.1 19.9 106 Elk River 8700 13.4 17.9 75 19.2 18.7 103 Little Snake River 8915 26.2 22.1 119 37.4 27.6 136 Old Battle 10000 35.4 28.4 125 36.5 32.7 112 Sage Creek Basin 7850 7.3 12.3 59 15.4 13.4 115 Sandstone RS 8150 8.4 13.1 64 15.7 17.3 91 Whiskey Park 8950 25.3 24.9 102 28.9 26.2 110 ----- ----- Basin Index (%) 90 112 UPPER GREEN RIVER Big Sandy Opening 9080 20.4 12.1 169 22.6 12.4 182 Blind Bull Sum 8650 41.8 21.5 194 -M 18.4 * East Rim Divide 7930 17.6 9.8 180 20.6 11.1 186 Elkhart Park G.S. 9400 18.7 11.6 161 23.5 12.4 190 Gros Ventre Summit 8750 -M 12.4 * -M 12.0 * Gunsight Pass 9820 20.8 13.0 160 23.1 12.8 180 Kendall R.S. 7740 21.1 11.3 187 28.3 13.5 210 Loomis Park 8240 26.7 14.4 185 31.5 16.3 193 New Fork Lake 8340 16.2 10.0 162 17.2 10.2 169 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.4 11.7 157 26.1 13.3 196 Spring Creek Divide 9000 38.6 22.3 173 38.6 22.5 172 Triple Peak 8500 35.2 20.9 168 39.0 23.8 164 ----- ----- Basin Index (%) 174 182 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -M * 14.9 -M * Buck Pasture 9632 17.0 -M * 22.3 -M * EF Blacks Fork GS 9360 14.4 -M * 15.9 -M * Hams Fork 7840 13.6 10.6 128 19.7 10.7 184 Hewinta 9500 7.7 10.2 75 15.9 13.0 122 Hickerson Park 9122 7.6 7.1 107 10.8 9.3 116 Hole-in-Rock 9168 6.2 7.0 89 11.8 8.8 134 Indian Creek 9425 38.8 23.0 169 -M 21.1 * Kelley R.S. 8180 24.5 14.5 169 29.4 17.0 173 Spirit Lk 10235 14.6 -M * 17.0 -M * Steel Creek Park 10158 17.3 14.4 120 19.3 15.1 128 ----- ----- Basin Index (%) 133 145 UPPER BEAR RIVER Bear River RS 8777 9.2 -M * 17.4 -M * Bug Lake 7987 30.4 17.7 172 32.1 18.2 176 Burts Miller Ranch 8000 2.8 -M * 9.4 -M * Chalk Creek #1 9171 32.0 22.6 142 34.4 23.5 146 Hayden Fork 9130 19.0 14.7 129 28.5 19.6 145 Kelley R.S. 8180 24.5 14.5 169 29.4 17.0 173 Lily Lake 9133 13.1 11.8 111 18.9 15.9 119 Monte Cristo 8932 34.0 25.4 134 36.7 24.3 151 Salt River Summit 7760 19.6 12.6 156 -M 15.7 * ----- ----- Basin Index (%) 145 152 ----------------------------------------------------------------------------- -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.