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 26 , 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 14.6 168 37.9 19.5 194 Black Bear 8170 42.1 34.2 123 50.3 35.4 142 Blind Bull Sum 8650 41.8 21.2 197 -M 18.2 * Cottonwood Creek 7670 26.4 20.5 129 35.8 22.9 156 East Rim Divide 7930 17.6 9.7 181 20.5 11.0 186 Grand Targhee 9260 41.8 34.2 122 38.0 28.1 135 Granite Creek 6770 28.3 14.8 191 34.9 18.6 188 Grassy Lake 7265 34.4 30.5 113 51.3 33.6 153 Gros Ventre Summit 8750 19.0 12.1 157 23.2 11.9 195 Gunsight Pass 9820 20.7 12.7 163 23.1 12.6 183 Lewis Lake Divide 7850 41.2 28.8 143 52.6 33.1 159 Phillips Bench 8200 35.2 23.3 151 44.7 26.1 171 Salt River Summit 7760 19.7 12.4 159 -M 15.5 * Snake River Station 6920 19.1 15.7 122 33.8 21.0 161 Spring Creek Divide 9000 38.3 22.1 173 38.2 22.2 172 Thumb Divide 7980 22.8 14.9 153 26.7 17.1 156 Togwotee Pass 9580 31.9 21.2 150 36.3 22.4 162 Two Ocean Plateau 9240 -M 24.8 * -M 25.2 * Willow Creek 8380 28.8 25.8 112 46.6 31.0 150 Younts Peak 8350 25.0 13.7 182 30.1 14.6 206 ----- ----- Basin Index (%) 146 164 MADISON-GALLATIN Black Bear 8170 42.1 34.2 123 50.3 35.4 142 Canyon 7870 16.9 12.0 141 24.4 15.0 163 Madison Plateau 7750 25.3 20.7 122 34.0 24.4 139 West Yellowstone 6700 9.2 10.1 91 21.9 13.0 168 Whiskey Creek 6800 13.2 14.5 91 25.2 18.7 135 ----- ----- Basin Index (%) 117 146 YELLOWSTONE Beartooth Lake 9360 30.9 20.3 152 26.4 18.2 145 Burnt Mtn 5880 1.8 4.7 38 12.6 11.2 112 Canyon 7870 16.9 12.0 141 24.4 15.0 163 Cole Creek 7850 9.7 12.7 76 6.8 11.3 60 Evening Star 9200 36.7 23.3 158 43.0 25.2 171 Fisher Creek 9100 41.7 28.7 145 44.7 29.4 152 Northeast Entrance 7350 9.5 9.6 99 19.3 11.3 171 Parker Peak 9400 31.8 18.2 175 32.4 16.2 200 Sylvan Lake 8420 22.2 18.7 119 35.4 20.6 172 Thumb Divide 7980 22.8 14.9 153 26.7 17.1 156 Two Ocean Plateau 9240 -M 24.8 * -M 25.2 * White Mill 8700 33.4 20.9 160 34.0 21.9 155 Wolverine 7650 8.0 8.9 90 20.0 11.3 177 ----- ----- Basin Index (%) 138 156 WIND RIVER Burroughs Creek 8750 23.3 -M * 26.1 -M * Castle Creek 8400 10.9 -M * 14.3 -M * Cold Springs 9630 12.8 6.8 188 15.6 9.0 173 Deer Park 9700 28.8 14.1 204 33.8 17.7 191 Hobbs Park 10100 23.7 12.7 187 22.2 11.6 191 Kirwin 9550 19.7 8.8 224 22.0 10.4 212 Little Warm 9370 16.5 9.8 168 22.1 11.7 189 Owl Creek 8975 7.3 4.8 152 9.7 5.3 183 South Pass 9040 27.2 14.4 189 24.5 15.9 154 St. Lawrence Alt 8620 6.0 6.5 92 13.0 7.9 165 Togwotee Pass 9580 31.9 21.2 150 36.3 22.4 162 Townsend Creek 8700 13.0 8.7 149 17.1 10.5 163 ----- ----- Basin Index (%) 173 177 BIGHORN BASIN Bald Mtn. 9380 18.1 17.0 106 15.5 15.4 101 Bear Trap Meadow 8200 4.4 5.2 85 6.9 7.5 92 Bone Springs Div 9350 17.3 14.5 119 15.9 14.0 114 Grave Springs 8550 6.3 8.4 75 6.7 9.3 72 Kirwin 9550 19.7 8.8 224 22.0 10.4 212 Marquette 8760 8.0 -M * 12.5 -M * Middle Powder 7760 6.3 10.5 60 6.2 10.5 59 Owl Creek 8975 7.3 4.8 152 9.7 5.3 183 Powder River Pass 9480 7.4 9.6 77 11.0 11.4 96 Shell Creek 9580 15.9 13.5 118 12.7 12.4 102 Timber Creek 7950 5.0 4.2 119 8.1 6.5 125 ----- ----- Basin Index (%) 112 112 SHOSHONE RIVER Blackwater 9780 36.0 21.2 170 39.8 18.8 212 Evening Star 9200 36.7 23.3 158 43.0 25.2 171 Marquette 8760 8.0 -M * 12.5 -M * Sylvan Road 7120 11.3 10.8 105 29.6 15.5 191 Younts Peak 8350 25.0 13.7 182 30.1 14.6 206 ----- ----- Basin Index (%) 158 192 POWDER RIVER Bear Trap Meadow 8200 4.4 5.2 85 6.9 7.5 92 Cloud Peak Reservoir 9860 13.0 13.4 97 14.2 11.8 120 Grave Springs 8550 6.3 8.4 75 6.7 9.3 72 Hansen Sawmill 8360 8.2 6.0 137 10.8 7.6 142 Middle Powder 7760 6.3 10.5 60 6.2 10.5 59 Powder River Pass 9480 7.4 9.6 77 11.0 11.4 96 Soldier Park 8720 12.0 -M * 10.7 -M * ----- ----- Basin Index (%) 86 96 TONGUE RIVER Big Goose 7990 9.6 8.2 117 11.0 9.6 115 Bone Springs Div 9350 17.3 14.5 119 15.9 14.0 114 Burgess Junction 7880 9.3 10.3 90 10.2 10.9 94 Dome Lake 8880 13.8 10.8 128 13.7 12.0 114 Little Goose 8870 10.5 -M * 13.7 -M * Sucker Creek 8880 11.0 11.1 99 10.9 12.7 86 Tie Creek 6870 3.0 5.3 57 11.2 10.1 111 ----- ----- Basin Index (%) 106 105 BELLE FOURCHE Cole Canyon 5910 .0 5.7 0 6.9 8.2 84 ----- ----- Basin Index (%) 0 84 CHEYENNE RIVER BASIN Blind Park 6890 .1 7.1 1 7.9 10.7 74 North Rapid Creek 6130 1.8 6.7 27 6.7 8.9 75 ----- ----- Basin Index (%) 14 74 UPPER N. PLATTE Arapaho Ridge 10960 22.8 18.7 122 24.0 20.3 118 Blackhall Mtn 9820 34.3 -M * 35.5 -M * Columbine 9160 20.1 22.0 91 26.1 23.7 110 Divide Peak 8880 14.9 18.5 81 21.1 19.7 107 Joe Wright 10120 17.0 19.6 87 26.2 23.7 111 Laprele Creek 8375 9.7 9.4 103 10.7 11.2 96 Med Bow 10500 36.7 -M * 33.0 -M * North French Creek 10130 23.0 26.8 86 25.5 24.6 104 Never Summer 10280 21.0 18.6 113 17.7 -M * Old Battle 10000 35.4 27.8 127 36.5 32.4 113 Rawah 9020 9.1 9.9 92 15.6 12.8 122 Sage Creek Basin 7850 7.7 12.0 64 15.2 13.3 114 Sand Lake 10050 28.6 25.9 110 25.6 22.5 114 South Brush Creek 8440 5.9 11.7 50 11.7 13.9 84 Tower 10500 39.2 41.6 94 41.8 36.8 114 Webber Springs 9250 25.5 22.0 116 31.7 24.6 129 Willow Creek Pass 9540 16.6 11.3 147 17.4 12.1 144 Zirkel 9340 33.9 25.7 132 40.3 26.2 154 ----- ----- Basin Index (%) 103 116 SWEETWATER Deer Park 9700 28.8 14.1 204 33.8 17.7 191 Larsen Creek 9000 16.7 11.7 143 22.0 -M * South Pass 9040 27.2 14.4 189 24.5 15.9 154 ----- ----- Basin Index (%) 181 174 LOWER N. PLATTE Casper Mtn. 7900 9.2 12.8 72 10.5 13.3 79 Laprele Creek 8375 9.7 9.4 103 10.7 11.2 96 Reno Hill 8400 10.7 12.5 86 12.1 13.7 88 Windy Peak 7900 7.7 7.6 101 10.3 9.5 108 ----- ----- Basin Index (%) 88 91 LARAMIE RIVER Brooklyn Lake 10240 22.7 18.5 123 21.8 19.2 114 Cinnabar Park 9574 16.8 19.4 87 21.0 22.2 95 Crow Creek 8330 .6 6.9 9 8.3 9.7 86 Deadman Hill 10220 19.5 14.6 134 18.7 15.6 120 Rawah 9020 9.1 9.9 92 15.6 12.8 122 Roach 9700 15.1 14.5 104 18.9 17.5 108 ----- ----- Basin Index (%) 100 108 S. PLATTE Black Mountain 8920 9.2 -M * 10.9 -M * Crow Creek 8330 .6 6.9 9 8.3 9.7 86 Deadman Hill 10220 19.5 14.6 134 18.7 15.6 120 ----- ----- Basin Index (%) 93 107 LITTLE SNAKE RIVER Battle Mountain 7440 3.7 11.1 33 15.7 14.0 112 Divide Peak 8880 14.9 18.5 81 21.1 19.7 107 Elk River 8700 13.4 17.7 76 19.2 18.5 104 Little Snake River 8915 26.0 21.7 120 37.1 27.3 136 Old Battle 10000 35.4 27.8 127 36.5 32.4 113 Sage Creek Basin 7850 7.7 12.0 64 15.2 13.3 114 Sandstone RS 8150 8.5 12.9 66 15.2 17.1 89 Whiskey Park 8950 25.0 24.7 101 28.7 25.8 111 ----- ----- Basin Index (%) 92 112 UPPER GREEN RIVER Big Sandy Opening 9080 20.3 12.0 169 22.5 12.2 184 Blind Bull Sum 8650 41.8 21.2 197 -M 18.2 * East Rim Divide 7930 17.6 9.7 181 20.5 11.0 186 Elkhart Park G.S. 9400 18.7 11.4 164 23.5 12.3 191 Gros Ventre Summit 8750 19.0 12.1 157 23.2 11.9 195 Gunsight Pass 9820 20.7 12.7 163 23.1 12.6 183 Kendall R.S. 7740 21.3 11.3 188 28.3 13.4 211 Loomis Park 8240 26.7 14.1 189 31.4 16.1 195 New Fork Lake 8340 16.3 9.8 166 17.1 10.1 169 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.4 11.4 161 26.0 13.1 198 Spring Creek Divide 9000 38.3 22.1 173 38.2 22.2 172 Triple Peak 8500 35.2 20.4 173 39.0 23.5 166 ----- ----- Basin Index (%) 175 185 LOWER GREEN RIVER Blacks Fork Jct 8869 7.8 -M * 14.2 -M * Buck Pasture 9632 16.3 -M * 21.6 -M * EF Blacks Fork GS 9360 13.7 -M * 15.2 -M * Hams Fork 7840 13.9 10.6 131 19.6 10.5 187 Hewinta 9500 6.7 10.0 67 14.9 12.8 116 Hickerson Park 9122 6.5 6.9 94 9.8 9.2 107 Hole-in-Rock 9168 4.7 6.9 68 10.3 8.6 120 Indian Creek 9425 38.5 22.4 172 -M 20.9 * Kelley R.S. 8180 24.5 14.2 173 29.3 16.8 174 Spirit Lk 10235 14.0 -M * 16.5 -M * Steel Creek Park 10158 16.3 14.0 116 18.4 14.8 124 ----- ----- Basin Index (%) 131 141 UPPER BEAR RIVER Bear River RS 8777 8.0 -M * 16.2 -M * Bug Lake 7987 30.1 17.4 173 31.7 17.9 177 Burts Miller Ranch 8000 2.1 -M * 8.6 -M * Chalk Creek #1 9171 30.4 22.3 136 32.9 23.1 142 Hayden Fork 9130 17.9 14.6 123 27.6 19.3 143 Kelley R.S. 8180 24.5 14.2 173 29.3 16.8 174 Lily Lake 9133 11.7 11.7 100 17.8 15.6 114 Monte Cristo 8932 33.8 25.2 134 36.6 24.0 152 Salt River Summit 7760 19.7 12.4 159 -M 15.5 * ----- ----- Basin Index (%) 143 151 ----------------------------------------------------------------------------- -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.