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 25 , 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 14.6 166 37.8 19.4 195 Black Bear 8170 41.7 33.9 123 50.0 35.3 142 Blind Bull Sum 8650 41.6 21.1 197 -M 18.1 * Cottonwood Creek 7670 26.1 20.5 127 35.5 22.7 156 East Rim Divide 7930 17.6 9.7 181 20.5 10.9 188 Grand Targhee 9260 41.7 33.9 123 38.0 27.7 137 Granite Creek 6770 28.3 14.8 191 34.7 18.5 188 Grassy Lake 7265 34.3 30.3 113 51.2 33.4 153 Gros Ventre Summit 8750 -M 12.0 * -M 11.8 * Gunsight Pass 9820 20.3 12.5 162 22.7 12.5 182 Lewis Lake Divide 7850 40.7 28.6 142 52.2 32.9 159 Phillips Bench 8200 35.1 23.1 152 44.6 25.9 172 Salt River Summit 7760 19.5 12.3 159 -M 15.4 * Snake River Station 6920 18.9 15.6 121 33.7 20.9 161 Spring Creek Divide 9000 37.9 21.9 173 38.0 22.0 173 Thumb Divide 7980 22.7 14.8 153 26.6 16.9 157 Togwotee Pass 9580 31.7 21.1 150 36.1 22.3 162 Two Ocean Plateau 9240 -M 24.6 * -M 25.1 * Willow Creek 8380 28.8 25.5 113 46.4 30.7 151 Younts Peak 8350 25.0 13.7 182 30.1 14.5 208 ----- ----- Basin Index (%) 146 163 MADISON-GALLATIN Black Bear 8170 41.7 33.9 123 50.0 35.3 142 Canyon 7870 16.8 12.0 140 24.4 14.9 164 Madison Plateau 7750 25.0 20.6 121 33.9 24.2 140 West Yellowstone 6700 9.4 10.0 94 21.8 12.9 169 Whiskey Creek 6800 13.2 14.4 92 25.1 18.6 135 ----- ----- Basin Index (%) 117 147 YELLOWSTONE Beartooth Lake 9360 30.8 20.1 153 26.3 18.1 145 Burnt Mtn 5880 2.0 4.8 42 12.6 11.2 112 Canyon 7870 16.8 12.0 140 24.4 14.9 164 Cole Creek 7850 9.6 12.5 77 6.8 11.2 61 Evening Star 9200 36.7 23.1 159 43.0 25.0 172 Fisher Creek 9100 41.4 28.6 145 44.5 29.3 152 Northeast Entrance 7350 9.5 9.5 100 19.3 11.2 172 Parker Peak 9400 31.7 18.0 176 32.4 16.1 201 Sylvan Lake 8420 22.0 18.6 118 35.3 20.4 173 Thumb Divide 7980 22.7 14.8 153 26.6 16.9 157 Two Ocean Plateau 9240 -M 24.6 * -M 25.1 * White Mill 8700 33.1 20.8 159 34.0 21.8 156 Wolverine 7650 8.8 8.9 99 20.1 11.2 179 ----- ----- Basin Index (%) 138 157 WIND RIVER Burroughs Creek 8750 23.2 -M * 26.1 -M * Castle Creek 8400 10.9 -M * 14.3 -M * Cold Springs 9630 12.6 6.7 188 15.5 8.8 176 Deer Park 9700 28.7 14.1 204 33.7 17.6 191 Hobbs Park 10100 23.5 12.5 188 22.1 11.5 192 Kirwin 9550 19.5 8.7 224 22.0 10.3 214 Little Warm 9370 16.2 9.7 167 22.1 11.5 192 Owl Creek 8975 6.7 4.7 143 9.2 5.2 177 South Pass 9040 27.0 14.4 188 24.4 15.7 155 St. Lawrence Alt 8620 6.0 6.4 94 12.9 7.8 165 Togwotee Pass 9580 31.7 21.1 150 36.1 22.3 162 Townsend Creek 8700 12.9 8.6 150 17.0 10.4 163 ----- ----- Basin Index (%) 173 178 BIGHORN BASIN Bald Mtn. 9380 17.6 16.8 105 15.2 15.3 99 Bear Trap Meadow 8200 4.2 5.2 81 6.6 7.4 89 Bone Springs Div 9350 16.6 14.3 116 15.6 13.8 113 Grave Springs 8550 6.1 8.3 73 6.6 9.3 71 Kirwin 9550 19.5 8.7 224 22.0 10.3 214 Marquette 8760 7.7 -M * 13.0 -M * Middle Powder 7760 6.1 10.4 59 6.2 10.4 60 Owl Creek 8975 6.7 4.7 143 9.2 5.2 177 Powder River Pass 9480 7.2 9.5 76 10.7 11.3 95 Shell Creek 9580 15.1 13.3 114 12.2 12.3 99 Timber Creek 7950 4.5 4.2 107 7.6 6.4 119 ----- ----- Basin Index (%) 109 110 SHOSHONE RIVER Blackwater 9780 36.0 21.1 171 39.8 18.6 214 Evening Star 9200 36.7 23.1 159 43.0 25.0 172 Marquette 8760 7.7 -M * 13.0 -M * Sylvan Road 7120 11.5 10.7 107 29.5 15.5 190 Younts Peak 8350 25.0 13.7 182 30.1 14.5 208 ----- ----- Basin Index (%) 159 193 POWDER RIVER Bear Trap Meadow 8200 4.2 5.2 81 6.6 7.4 89 Cloud Peak Reservoir 9860 12.4 13.4 93 13.8 11.7 118 Grave Springs 8550 6.1 8.3 73 6.6 9.3 71 Hansen Sawmill 8360 7.7 6.0 128 10.2 7.5 136 Middle Powder 7760 6.1 10.4 59 6.2 10.4 60 Powder River Pass 9480 7.2 9.5 76 10.7 11.3 95 Soldier Park 8720 11.4 -M * 10.0 -M * ----- ----- Basin Index (%) 83 94 TONGUE RIVER Big Goose 7990 8.8 8.1 109 10.4 9.6 108 Bone Springs Div 9350 16.6 14.3 116 15.6 13.8 113 Burgess Junction 7880 8.7 10.1 86 9.8 10.8 91 Dome Lake 8880 13.0 10.7 121 13.1 12.0 109 Little Goose 8870 9.7 -M * 12.9 -M * Sucker Creek 8880 10.3 11.1 93 10.4 12.7 82 Tie Creek 6870 2.7 5.2 52 10.7 10.0 107 ----- ----- Basin Index (%) 101 102 BELLE FOURCHE Cole Canyon 5910 .5 5.7 9 6.7 8.2 82 ----- ----- Basin Index (%) 9 82 CHEYENNE RIVER BASIN Blind Park 6890 .7 7.0 10 7.9 10.7 74 North Rapid Creek 6130 2.3 6.7 34 6.7 8.8 76 ----- ----- Basin Index (%) 22 75 UPPER N. PLATTE Arapaho Ridge 10960 22.9 18.5 124 23.7 20.3 117 Blackhall Mtn 9820 34.1 -M * 35.3 -M * Columbine 9160 20.2 22.0 92 25.8 23.5 110 Divide Peak 8880 15.1 18.3 83 21.0 19.6 107 Joe Wright 10120 16.6 19.4 86 25.8 23.5 110 Laprele Creek 8375 9.9 9.4 105 10.7 11.2 96 Med Bow 10500 37.2 -M * 32.6 -M * North French Creek 10130 23.1 26.6 87 25.2 24.5 103 Never Summer 10280 21.1 18.5 114 17.4 -M * Old Battle 10000 35.3 27.6 128 36.4 32.2 113 Rawah 9020 9.0 9.8 92 15.2 12.7 120 Sage Creek Basin 7850 8.2 11.9 69 15.2 13.2 115 Sand Lake 10050 28.5 25.7 111 25.6 22.4 114 South Brush Creek 8440 5.9 11.6 51 11.5 13.8 83 Tower 10500 38.9 41.3 94 41.6 36.7 113 Webber Springs 9250 26.3 21.8 121 31.6 24.5 129 Willow Creek Pass 9540 16.3 11.2 146 17.2 12.0 143 Zirkel 9340 34.1 25.6 133 40.3 26.1 154 ----- ----- Basin Index (%) 104 116 SWEETWATER Deer Park 9700 28.7 14.1 204 33.7 17.6 191 Larsen Creek 9000 16.7 11.6 144 21.9 -M * South Pass 9040 27.0 14.4 188 24.4 15.7 155 ----- ----- Basin Index (%) 181 174 LOWER N. PLATTE Casper Mtn. 7900 9.1 12.7 72 10.4 13.3 78 Laprele Creek 8375 9.9 9.4 105 10.7 11.2 96 Reno Hill 8400 10.6 12.4 85 12.0 13.6 88 Windy Peak 7900 7.8 7.5 104 10.2 9.4 109 ----- ----- Basin Index (%) 89 91 LARAMIE RIVER Brooklyn Lake 10240 23.2 18.3 127 21.7 19.1 114 Cinnabar Park 9574 17.1 19.2 89 20.8 22.0 95 Crow Creek 8330 1.1 6.9 16 8.2 9.6 85 Deadman Hill 10220 20.0 14.4 139 18.4 15.5 119 Rawah 9020 9.0 9.8 92 15.2 12.7 120 Roach 9700 15.1 14.4 105 18.8 17.4 108 ----- ----- Basin Index (%) 103 107 S. PLATTE Black Mountain 8920 9.3 -M * 10.7 -M * Crow Creek 8330 1.1 6.9 16 8.2 9.6 85 Deadman Hill 10220 20.0 14.4 139 18.4 15.5 119 ----- ----- Basin Index (%) 99 106 LITTLE SNAKE RIVER Battle Mountain 7440 4.1 11.2 37 15.6 13.9 112 Divide Peak 8880 15.1 18.3 83 21.0 19.6 107 Elk River 8700 13.9 17.6 79 19.1 18.4 104 Little Snake River 8915 25.9 21.6 120 36.8 27.1 136 Old Battle 10000 35.3 27.6 128 36.4 32.2 113 Sage Creek Basin 7850 8.2 11.9 69 15.2 13.2 115 Sandstone RS 8150 8.5 12.9 66 15.2 17.1 89 Whiskey Park 8950 24.8 24.6 101 28.4 25.7 111 ----- ----- Basin Index (%) 93 112 UPPER GREEN RIVER Big Sandy Opening 9080 20.0 11.9 168 22.4 12.1 185 Blind Bull Sum 8650 41.6 21.1 197 -M 18.1 * East Rim Divide 7930 17.6 9.7 181 20.5 10.9 188 Elkhart Park G.S. 9400 18.2 11.2 162 23.0 12.2 189 Gros Ventre Summit 8750 -M 12.0 * -M 11.8 * Gunsight Pass 9820 20.3 12.5 162 22.7 12.5 182 Kendall R.S. 7740 21.1 11.4 185 28.1 13.2 213 Loomis Park 8240 26.4 14.0 189 31.1 16.0 194 New Fork Lake 8340 15.9 9.7 164 17.0 10.0 170 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.4 11.3 163 26.0 13.1 198 Spring Creek Divide 9000 37.9 21.9 173 38.0 22.0 173 Triple Peak 8500 34.9 20.3 172 38.8 23.4 166 ----- ----- Basin Index (%) 176 184 LOWER GREEN RIVER Blacks Fork Jct 8869 7.7 -M * 14.0 -M * Buck Pasture 9632 16.2 -M * 21.4 -M * EF Blacks Fork GS 9360 13.4 -M * 14.9 -M * Hams Fork 7840 13.9 10.5 132 19.6 10.5 187 Hewinta 9500 6.5 9.9 66 14.7 12.7 116 Hickerson Park 9122 6.2 6.9 90 9.4 9.2 102 Hole-in-Rock 9168 4.3 6.9 62 9.9 8.6 115 Indian Creek 9425 38.2 22.2 172 -M 20.7 * Kelley R.S. 8180 24.3 14.1 172 29.1 16.7 174 Spirit Lk 10235 13.8 -M * 16.2 -M * Steel Creek Park 10158 16.0 13.8 116 18.1 14.7 123 ----- ----- Basin Index (%) 130 139 UPPER BEAR RIVER Bear River RS 8777 8.1 -M * 16.1 -M * Bug Lake 7987 29.8 17.3 172 31.4 17.8 176 Burts Miller Ranch 8000 2.2 -M * 8.6 -M * Chalk Creek #1 9171 30.2 22.1 137 32.7 22.9 143 Hayden Fork 9130 17.7 14.5 122 27.5 19.1 144 Kelley R.S. 8180 24.3 14.1 172 29.1 16.7 174 Lily Lake 9133 11.6 11.6 100 17.5 15.5 113 Monte Cristo 8932 33.7 25.1 134 36.4 23.7 154 Salt River Summit 7760 19.5 12.3 159 -M 15.4 * ----- ----- 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.