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 MONDAY: MAY 29 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .6 .0 * 43.3 25.4 170 Black Bear 8170 40.4 28.0 144 61.9 45.9 135 Blind Bull Sum 8650 47.4 14.2 334 40.0 24.1 166 Cottonwood Creek 7670 10.5 .0 * 46.0 31.1 148 East Rim Divide 7930 .1 .0 * 23.7 14.8 160 Grand Targhee 9260 52.2 40.8 128 53.5 38.2 140 Granite Creek 6770 .0 .0 * 39.5 23.8 166 Grassy Lake 7265 17.6 8.3 212 62.9 43.3 145 Gros Ventre Summit 8750 8.8 .0 * 27.4 16.8 163 Gunsight Pass 9820 18.0 4.6 391 30.1 18.4 164 Lewis Lake Divide 7850 27.2 14.6 186 60.3 42.3 143 Phillips Bench 8200 25.6 12.1 212 51.7 33.9 153 Salt River Summit 7760 .0 .0 * 32.9 20.6 160 Snake River Station 6920 .0 .0 * 40.0 27.5 145 Spring Creek Divide 9000 32.4 13.6 238 46.5 28.9 161 Thumb Divide 7980 .3 .0 * 31.5 23.6 133 Togwotee Pass 9580 30.2 20.6 147 44.9 30.7 146 Two Ocean Plateau 9240 -M 26.5 * -M 34.1 * Willow Creek 8380 -M 6.4 * 60.0 42.2 142 Younts Peak 8350 .0 6.3 0 34.8 20.4 171 ----- ----- Basin Index (%) 191 151 MADISON-GALLATIN Black Bear 8170 40.4 28.0 144 61.9 45.9 135 Canyon 7870 1.4 .0 * 30.0 20.7 145 Madison Plateau 7750 13.2 9.0 147 41.6 32.8 127 West Yellowstone 6700 .0 .0 * 26.8 18.3 146 Whiskey Creek 6800 -M .0 * 31.7 25.3 125 ----- ----- Basin Index (%) 149* 134 YELLOWSTONE Beartooth Lake 9360 31.4 18.9 166 33.3 25.0 133 Burnt Mtn 5880 .0 .0 * 23.7 20.5 116 Canyon 7870 1.4 .0 * 30.0 20.7 145 Cole Creek 7850 13.2 11.4 116 19.6 21.0 93 Evening Star 9200 33.2 19.8 168 51.2 34.6 148 Fisher Creek 9100 43.4 29.2 149 53.7 39.7 135 Northeast Entrance 7350 .0 .0 * 23.8 16.4 145 Parker Peak 9400 30.9 15.9 194 41.5 23.5 177 Sylvan Lake 8420 11.8 9.6 123 43.7 29.0 151 Thumb Divide 7980 .3 .0 * 31.5 23.6 133 Two Ocean Plateau 9240 -M 26.5 * -M 34.1 * White Mill 8700 27.9 18.9 148 40.7 30.1 135 Wolverine 7650 -M .0 * 24.9 16.3 153 ----- ----- Basin Index (%) 156 139 WIND RIVER Burroughs Creek 8750 1.5 -M * 30.1 -M * Castle Creek 8400 .0 -M * 19.3 -M * Cold Springs 9630 2.3 .0 * 24.9 15.1 165 Deer Park 9700 30.9 5.4 572 47.9 26.9 178 Hobbs Park 10100 30.8 8.1 380 38.7 20.2 192 Kirwin 9550 17.1 3.6 475 31.5 16.7 189 Little Warm 9370 8.5 .0 * 28.3 18.2 155 Owl Creek 8975 .0 .0 * 17.4 10.5 166 South Pass 9040 27.4 .7 3914* 38.0 23.4 162 St. Lawrence Alt 8620 .0 .0 * 23.4 14.3 164 Togwotee Pass 9580 30.2 20.6 147 44.9 30.7 146 Townsend Creek 8700 10.4 .0 * 32.0 17.9 179 ----- ----- Basin Index (%) 410* 169 BIGHORN BASIN Bald Mtn. 9380 20.0 15.3 131 23.7 23.2 102 Bear Trap Meadow 8200 .0 .0 * 17.2 13.6 126 Bone Springs Div 9350 15.7 10.8 145 23.7 22.0 108 Grave Springs 8550 .7 .0 * 15.8 16.0 99 Kirwin 9550 17.1 3.6 475 31.5 16.7 189 Marquette 8760 13.7 -M * 26.7 -M * Middle Powder 7760 .0 .0 * 15.9 17.1 93 Owl Creek 8975 .0 .0 * 17.4 10.5 166 Powder River Pass 9480 .2 .0 * 19.4 18.4 105 Shell Creek 9580 12.9 11.2 115 19.8 19.6 101 Timber Creek 7950 .0 .0 * 19.1 13.2 145 ----- ----- Basin Index (%) 163* 119 SHOSHONE RIVER Blackwater 9780 36.6 21.7 169 48.5 27.1 179 Evening Star 9200 33.2 19.8 168 51.2 34.6 148 Marquette 8760 13.7 -M * 26.7 -M * Sylvan Road 7120 .0 .0 * 33.4 21.1 158 Younts Peak 8350 .0 6.3 0 34.8 20.4 171 ----- ----- Basin Index (%) 146 163 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.2 13.6 126 Cloud Peak Reservoir 9860 17.1 8.4 204 28.9 20.9 138 Grave Springs 8550 .7 .0 * 15.8 16.0 99 Hansen Sawmill 8360 2.4 .0 * 19.0 13.9 137 Middle Powder 7760 .0 .0 * 15.9 17.1 93 Powder River Pass 9480 .2 .0 * 19.4 18.4 105 Soldier Park 8720 4.2 -M * 23.0 -M * ----- ----- Basin Index (%) 243* 116 TONGUE RIVER Big Goose 7990 5.4 .0 * 21.8 18.1 120 Bone Springs Div 9350 15.7 10.8 145 23.7 22.0 108 Burgess Junction 7880 3.0 1.4 214 18.6 17.8 104 Dome Lake 8880 12.0 .0 * 25.3 20.1 126 Little Goose 8870 9.4 -M * 26.3 -M * Sucker Creek 8880 8.7 2.3 378 21.5 21.2 101 Tie Creek 6870 .2 .0 * 24.8 18.4 135 ----- ----- Basin Index (%) 310* 115 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.3 16.1 89 ----- ----- Basin Index (%) * 89 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 15.2 18.0 84 North Rapid Creek 6130 .0 .0 * 13.3 15.7 85 ----- ----- Basin Index (%) * 85 UPPER N. PLATTE Arapaho Ridge 10960 20.6 10.2 202 33.5 29.0 116 Blackhall Mtn 9820 28.1 -M * 45.3 -M * Columbine 9160 .0 .0 * 35.4 31.3 113 Divide Peak 8880 .0 .0 * 28.3 27.2 104 Joe Wright 10120 14.8 15.7 94 38.1 33.9 112 Laprele Creek 8375 .2 .0 * 18.1 17.7 102 Med Bow 10500 35.9 -M * 44.2 -M * North French Creek 10130 21.8 23.0 95 36.8 34.8 106 Never Summer 10280 22.7 16.6 137 26.2 -M * Old Battle 10000 37.4 26.5 141 46.7 43.2 108 Rawah 9020 .2 .0 * 23.1 19.3 120 Sage Creek Basin 7850 -M .0 * 19.6 17.8 110 Sand Lake 10050 31.1 22.1 141 35.8 32.8 109 South Brush Creek 8440 .0 .0 * 17.5 20.9 84 Tower 10500 40.5 40.1 101 56.2 48.9 115 Webber Springs 9250 9.3 1.1 845* 40.5 32.8 123 Willow Creek Pass 9540 10.6 1.9 558 23.7 18.2 130 Zirkel 9340 5.4 .0 * 50.6 33.8 150 ----- ----- Basin Index (%) 137* 114 SWEETWATER Deer Park 9700 30.9 5.4 572 47.9 26.9 178 Larsen Creek 9000 .2 .9 22* 28.4 -M * South Pass 9040 27.4 .7 3914* 38.0 23.4 162 ----- ----- Basin Index (%) 836* 171 LOWER N. PLATTE Casper Mtn. 7900 .4 .0 * 22.2 21.4 104 Laprele Creek 8375 .2 .0 * 18.1 17.7 102 Reno Hill 8400 .1 .0 * 22.5 22.4 100 Windy Peak 7900 .0 .0 * 18.7 15.8 118 ----- ----- Basin Index (%) * 105 LARAMIE RIVER Brooklyn Lake 10240 10.2 8.0 128 29.9 28.1 106 Cinnabar Park 9574 3.4 3.7 92 29.5 30.1 98 Crow Creek 8330 .0 .0 * 16.1 15.9 101 Deadman Hill 10220 17.0 10.3 165 30.0 23.8 126 Rawah 9020 .2 .0 * 23.1 19.3 120 Roach 9700 6.9 3.9 177 29.0 25.4 114 ----- ----- Basin Index (%) 146 111 S. PLATTE Black Mountain 8920 -M -M * 21.2 -M * Crow Creek 8330 .0 .0 * 16.1 15.9 101 Deadman Hill 10220 17.0 10.3 165 30.0 23.8 126 ----- ----- Basin Index (%) 165* 116 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.9 19.1 109 Divide Peak 8880 .0 .0 * 28.3 27.2 104 Elk River 8700 .1 .0 * 25.2 25.2 100 Little Snake River 8915 7.9 4.1 193 45.8 35.9 128 Old Battle 10000 37.4 26.5 141 46.7 43.2 108 Sage Creek Basin 7850 -M .0 * 19.6 17.8 110 Sandstone RS 8150 .0 .0 * 20.0 23.1 87 Whiskey Park 8950 12.2 10.2 120 37.8 34.6 109 ----- ----- Basin Index (%) 141* 108 UPPER GREEN RIVER Big Sandy Opening 9080 8.0 .0 * 27.5 17.7 155 Blind Bull Sum 8650 47.4 14.2 334 40.0 24.1 166 East Rim Divide 7930 .1 .0 * 23.7 14.8 160 Elkhart Park G.S. 9400 7.5 1.0 750* 27.7 17.6 157 Gros Ventre Summit 8750 8.8 .0 * 27.4 16.8 163 Gunsight Pass 9820 18.0 4.6 391 30.1 18.4 164 Kendall R.S. 7740 .0 .0 * 31.9 17.4 183 Loomis Park 8240 7.5 .0 * 35.5 21.3 167 New Fork Lake 8340 -M .0 * 22.5 14.3 157 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 30.2 17.4 174 Spring Creek Divide 9000 32.4 13.6 238 46.5 28.9 161 Triple Peak 8500 16.7 .1 16700* 46.4 31.2 149 ----- ----- Basin Index (%) 437* 162 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 19.8 -M * Buck Pasture 9632 .2 -M * 28.9 -M * EF Blacks Fork GS 9360 -M -M * 24.1 -M * Hams Fork 7840 .0 .0 * 25.0 15.0 167 Hewinta 9500 .0 .0 * 22.4 18.4 122 Hickerson Park 9122 .0 .0 * 16.3 14.2 115 Hole-in-Rock 9168 .0 .0 * 17.2 13.7 126 Indian Creek 9425 29.6 12.6 235 47.1 27.8 169 Kelley R.S. 8180 -M .0 * 35.6 22.6 158 Spirit Lk 10235 .2 -M * 22.6 -M * Steel Creek Park 10158 13.3 10.5 127 26.9 21.7 124 ----- ----- Basin Index (%) 186* 143 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.3 -M * Bug Lake 7987 10.6 .0 * 39.3 24.3 162 Burts Miller Ranch 8000 .0 -M * 12.4 -M * Chalk Creek #1 9171 15.7 8.1 194 42.5 31.7 134 Hayden Fork 9130 .1 .0 * 33.2 26.6 125 Kelley R.S. 8180 -M .0 * 35.6 22.6 158 Lily Lake 9133 .0 .0 * 24.1 22.1 109 Monte Cristo 8932 20.2 6.3 321 46.5 32.5 143 Salt River Summit 7760 .0 .0 * 32.9 20.6 160 ----- ----- Basin Index (%) 324* 141 ----------------------------------------------------------------------------- -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.