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 FRIDAY: MAY 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 3.0 .0 * 43.2 25.1 172 Black Bear 8170 41.8 30.6 137 61.7 45.5 136 Blind Bull Sum 8650 -M 16.5 * 39.6 23.8 166 Cottonwood Creek 7670 13.3 .7 1900* 45.7 30.7 149 East Rim Divide 7930 .0 .0 * 23.5 14.6 161 Grand Targhee 9260 52.5 41.2 127 52.9 38.1 139 Granite Creek 6770 .1 .0 * 38.8 23.5 165 Grassy Lake 7265 18.9 11.2 169 62.5 42.8 146 Gros Ventre Summit 8750 -M 1.6 * -M 16.5 * Gunsight Pass 9820 18.9 6.5 291 29.6 18.2 163 Lewis Lake Divide 7850 29.3 17.6 166 60.2 41.8 144 Phillips Bench 8200 26.1 14.4 181 51.3 33.5 153 Salt River Summit 7760 .0 .0 * 32.8 20.4 161 Snake River Station 6920 .0 .0 * 39.6 27.1 146 Spring Creek Divide 9000 34.4 15.9 216 46.3 28.7 161 Thumb Divide 7980 .2 .0 * 31.2 23.3 134 Togwotee Pass 9580 30.7 22.2 138 44.5 30.4 146 Two Ocean Plateau 9240 -M 27.6 * -M 33.6 * Willow Creek 8380 -M 9.8 * 59.5 41.8 142 Younts Peak 8350 .0 9.1 0 34.0 20.1 169 ----- ----- Basin Index (%) 159* 151 MADISON-GALLATIN Black Bear 8170 41.8 30.6 137 61.7 45.5 136 Canyon 7870 3.4 .0 * 29.8 20.4 146 Madison Plateau 7750 14.8 11.4 130 41.4 32.3 128 West Yellowstone 6700 .0 .0 * 26.8 18.0 149 Whiskey Creek 6800 .0 1.9 0 31.2 25.0 125 ----- ----- Basin Index (%) 137 135 YELLOWSTONE Beartooth Lake 9360 32.1 20.1 160 33.2 24.7 134 Burnt Mtn 5880 .0 .0 * 23.7 20.1 118 Canyon 7870 3.4 .0 * 29.8 20.4 146 Cole Creek 7850 14.4 13.1 110 19.3 20.4 95 Evening Star 9200 33.6 21.4 157 51.0 34.2 149 Fisher Creek 9100 46.0 30.7 150 53.7 39.2 137 Northeast Entrance 7350 .0 .0 * 23.8 16.1 148 Parker Peak 9400 32.0 18.1 177 41.4 23.1 179 Sylvan Lake 8420 12.6 12.1 104 43.5 28.4 153 Thumb Divide 7980 .2 .0 * 31.2 23.3 134 Two Ocean Plateau 9240 -M 27.6 * -M 33.6 * White Mill 8700 29.3 20.5 143 40.7 29.6 138 Wolverine 7650 -M .0 * 24.7 16.0 154 ----- ----- Basin Index (%) 150 141 WIND RIVER Burroughs Creek 8750 3.5 -M * 29.8 -M * Castle Creek 8400 .0 -M * 18.8 -M * Cold Springs 9630 3.6 .0 * 24.5 14.9 164 Deer Park 9700 31.8 7.6 418 47.2 26.7 177 Hobbs Park 10100 30.5 10.2 299 37.9 19.9 190 Kirwin 9550 17.7 5.5 322 30.9 16.4 188 Little Warm 9370 8.9 .1 8900* 28.1 17.9 157 Owl Creek 8975 .0 .0 * 17.1 10.2 168 South Pass 9040 27.1 2.0 1355 37.0 23.1 160 St. Lawrence Alt 8620 .1 .0 * 23.0 13.9 165 Togwotee Pass 9580 30.7 22.2 138 44.5 30.4 146 Townsend Creek 8700 11.0 .0 * 31.4 17.7 177 ----- ----- Basin Index (%) 339* 168 BIGHORN BASIN Bald Mtn. 9380 19.8 16.8 118 23.1 22.9 101 Bear Trap Meadow 8200 .0 .0 * 17.2 13.4 128 Bone Springs Div 9350 16.5 12.2 135 23.2 21.7 107 Grave Springs 8550 1.6 .0 * 15.9 15.7 101 Kirwin 9550 17.7 5.5 322 30.9 16.4 188 Marquette 8760 14.3 -M * 26.5 -M * Middle Powder 7760 .0 .5 0* 15.7 16.9 93 Owl Creek 8975 .0 .0 * 17.1 10.2 168 Powder River Pass 9480 .7 1.4 50 19.1 18.1 106 Shell Creek 9580 13.1 13.2 99 19.6 19.3 102 Timber Creek 7950 .4 .0 * 18.5 12.9 143 ----- ----- Basin Index (%) 141* 120 SHOSHONE RIVER Blackwater 9780 36.0 22.9 157 48.2 26.8 180 Evening Star 9200 33.6 21.4 157 51.0 34.2 149 Marquette 8760 14.3 -M * 26.5 -M * Sylvan Road 7120 .0 .0 * 33.3 20.8 160 Younts Peak 8350 .0 9.1 0 34.0 20.1 169 ----- ----- Basin Index (%) 130 163 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.2 13.4 128 Cloud Peak Reservoir 9860 17.1 11.2 153 28.7 20.5 140 Grave Springs 8550 1.6 .0 * 15.9 15.7 101 Hansen Sawmill 8360 3.4 .0 * -M 13.6 * Middle Powder 7760 .0 .5 0* 15.7 16.9 93 Powder River Pass 9480 .7 1.4 50 19.1 18.1 106 Soldier Park 8720 5.1 -M * 22.5 -M * ----- ----- Basin Index (%) 174* 114 TONGUE RIVER Big Goose 7990 6.1 .2 3050* 21.6 17.9 121 Bone Springs Div 9350 16.5 12.2 135 23.2 21.7 107 Burgess Junction 7880 4.1 3.8 108 17.6 17.6 100 Dome Lake 8880 12.5 1.7 735 24.6 19.8 124 Little Goose 8870 9.8 -M * 25.8 -M * Sucker Creek 8880 9.6 4.8 200 21.0 21.0 100 Tie Creek 6870 .1 .0 * 24.5 18.1 135 ----- ----- Basin Index (%) 215 114 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.3 15.8 91 ----- ----- Basin Index (%) * 91 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 14.7 17.7 83 North Rapid Creek 6130 -M .0 * 12.9 15.3 84 ----- ----- Basin Index (%) * 84 UPPER N. PLATTE Arapaho Ridge 10960 21.1 12.9 164 33.1 28.9 115 Blackhall Mtn 9820 28.7 -M * 44.7 -M * Columbine 9160 .0 .0 * 35.1 31.0 113 Divide Peak 8880 .0 .6 0* 28.1 26.9 104 Joe Wright 10120 15.1 17.9 84 37.4 33.5 112 Laprele Creek 8375 .2 .0 * 17.8 17.4 102 Med Bow 10500 35.8 -M * 43.5 -M * North French Creek 10130 22.0 25.5 86 36.3 34.4 106 Never Summer 10280 22.1 17.6 126 25.6 -M * Old Battle 10000 37.0 29.1 127 45.8 42.9 107 Rawah 9020 .2 .0 * 22.5 19.2 117 Sage Creek Basin 7850 -M .0 * 19.2 17.7 108 Sand Lake 10050 31.0 24.4 127 34.8 32.5 107 South Brush Creek 8440 .0 .0 * 16.9 20.6 82 Tower 10500 40.3 43.8 92 55.0 48.6 113 Webber Springs 9250 10.2 5.2 196 39.8 32.5 122 Willow Creek Pass 9540 11.3 4.9 231 23.1 17.9 129 Zirkel 9340 7.8 .8 975* 50.4 33.7 150 ----- ----- Basin Index (%) 119 113 SWEETWATER Deer Park 9700 31.8 7.6 418 47.2 26.7 177 Larsen Creek 9000 .1 1.8 6 28.0 -M * South Pass 9040 27.1 2.0 1355 37.0 23.1 160 ----- ----- Basin Index (%) 518 169 LOWER N. PLATTE Casper Mtn. 7900 .3 .7 43* 21.9 21.1 104 Laprele Creek 8375 .2 .0 * 17.8 17.4 102 Reno Hill 8400 .3 .0 * 22.2 22.0 101 Windy Peak 7900 .0 .0 * 18.3 15.5 118 ----- ----- Basin Index (%) 114* 106 LARAMIE RIVER Brooklyn Lake 10240 11.7 11.0 106 29.3 27.8 105 Cinnabar Park 9574 5.2 6.5 80 29.3 29.9 98 Crow Creek 8330 .0 .0 * 16.0 15.8 101 Deadman Hill 10220 16.4 12.5 131 29.2 23.5 124 Rawah 9020 .2 .0 * 22.5 19.2 117 Roach 9700 8.0 6.5 123 28.6 25.2 113 ----- ----- Basin Index (%) 114 110 S. PLATTE Black Mountain 8920 .1 -M * 20.9 -M * Crow Creek 8330 .0 .0 * 16.0 15.8 101 Deadman Hill 10220 16.4 12.5 131 29.2 23.5 124 ----- ----- Basin Index (%) 131* 115 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.6 18.9 109 Divide Peak 8880 .0 .6 0* 28.1 26.9 104 Elk River 8700 .1 .0 * 24.8 25.0 99 Little Snake River 8915 9.7 6.9 141 45.3 35.8 127 Old Battle 10000 37.0 29.1 127 45.8 42.9 107 Sage Creek Basin 7850 -M .0 * 19.2 17.7 108 Sandstone RS 8150 .0 .0 * 19.6 22.9 86 Whiskey Park 8950 12.0 14.5 83 37.3 34.3 109 ----- ----- Basin Index (%) 115* 107 UPPER GREEN RIVER Big Sandy Opening 9080 9.3 .0 * 27.4 17.4 157 Blind Bull Sum 8650 -M 16.5 * 39.6 23.8 166 East Rim Divide 7930 .0 .0 * 23.5 14.6 161 Elkhart Park G.S. 9400 8.9 2.7 330 27.6 17.3 160 Gros Ventre Summit 8750 -M 1.6 * -M 16.5 * Gunsight Pass 9820 18.9 6.5 291 29.6 18.2 163 Kendall R.S. 7740 .0 .0 * 31.8 17.2 185 Loomis Park 8240 9.5 .0 * 35.4 21.0 169 New Fork Lake 8340 -M .0 * 22.2 14.0 159 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 29.9 17.2 174 Spring Creek Divide 9000 34.4 15.9 216 46.3 28.7 161 Triple Peak 8500 18.8 2.5 752 46.1 30.9 149 ----- ----- Basin Index (%) 362* 163 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 19.8 -M * Buck Pasture 9632 .5 -M * 28.7 -M * EF Blacks Fork GS 9360 -M -M * 24.0 -M * Hams Fork 7840 .0 .0 * 24.9 14.8 168 Hewinta 9500 .0 .0 * 22.2 18.1 123 Hickerson Park 9122 .0 .0 * 16.2 14.0 116 Hole-in-Rock 9168 .0 .0 * 17.2 13.6 126 Indian Creek 9425 32.2 14.2 227 46.9 27.6 170 Kelley R.S. 8180 1.7 .0 * 35.5 22.3 159 Spirit Lk 10235 1.4 -M * 22.5 -M * Steel Creek Park 10158 14.1 11.7 121 26.8 21.5 125 ----- ----- Basin Index (%) 185* 144 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.3 -M * Bug Lake 7987 14.1 .0 * 39.2 24.1 163 Burts Miller Ranch 8000 .0 -M * 12.4 -M * Chalk Creek #1 9171 18.3 10.3 178 42.5 31.5 135 Hayden Fork 9130 .1 .0 * 33.3 26.3 127 Kelley R.S. 8180 1.7 .0 * 35.5 22.3 159 Lily Lake 9133 .0 .0 * 24.1 21.9 110 Monte Cristo 8932 23.2 8.7 267 46.5 32.2 144 Salt River Summit 7760 .0 .0 * 32.8 20.4 161 ----- ----- Basin Index (%) 302* 142 ----------------------------------------------------------------------------- -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.