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: MAY 13 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 -M 2.7 * -M 23.9 * Black Bear 8170 45.8 36.5 125 59.8 43.6 137 Blind Bull Sum 8650 -M 22.2 * 39.2 22.6 173 Cottonwood Creek 7670 20.4 11.6 176 44.1 29.3 151 East Rim Divide 7930 .1 5.0 2 23.1 13.8 167 Grand Targhee 9260 56.5 45.9 123 51.8 36.5 142 Granite Creek 6770 13.1 3.2 409 38.4 22.4 171 Grassy Lake 7265 -M 23.9 * -M 40.9 * Gros Ventre Summit 8750 15.3 9.2 166 26.7 15.6 171 Gunsight Pass 9820 21.2 12.4 171 28.7 17.3 166 Lewis Lake Divide 7850 38.9 27.9 139 59.7 40.1 149 Phillips Bench 8200 33.8 22.5 150 50.8 32.3 157 Salt River Summit 7760 6.0 2.7 222 32.0 19.4 165 Snake River Station 6920 .0 .6 0* 39.2 25.8 152 Spring Creek Divide 9000 40.7 23.1 176 44.9 27.5 163 Thumb Divide 7980 -M 6.8 * -M 22.1 * Togwotee Pass 9580 32.5 25.1 129 43.3 29.0 149 Two Ocean Plateau 9240 -M 29.4 * -M 32.0 * Willow Creek 8380 -M 20.2 * -M 39.9 * Younts Peak 8350 8.6 14.5 59 33.7 18.9 178 ----- ----- Basin Index (%) 139 156 MADISON-GALLATIN Black Bear 8170 45.8 36.5 125 59.8 43.6 137 Canyon 7870 10.4 6.3 165 28.8 19.2 150 Madison Plateau 7750 20.1 18.4 109 40.1 30.3 132 West Yellowstone 6700 .0 .0 * 25.9 16.9 153 Whiskey Creek 6800 5.8 9.5 61 30.0 23.4 128 ----- ----- Basin Index (%) 116 138 YELLOWSTONE Beartooth Lake 9360 -M 22.8 * -M 23.5 * Burnt Mtn 5880 .0 .0 * 18.6 18.7 99 Canyon 7870 10.4 6.3 165 28.8 19.2 150 Cole Creek 7850 12.7 17.1 74 14.2 18.8 76 Evening Star 9200 34.8 25.5 136 49.6 32.3 154 Fisher Creek 9100 -M 34.4 * -M 37.2 * Northeast Entrance 7350 -M .5 * -M 14.9 * Parker Peak 9400 36.5 22.0 166 40.1 21.6 186 Sylvan Lake 8420 -M 17.5 * 42.1 26.8 157 Thumb Divide 7980 -M 6.8 * -M 22.1 * Two Ocean Plateau 9240 -M 29.4 * -M 32.0 * White Mill 8700 35.2 24.8 142 40.1 28.0 143 Wolverine 7650 -M .0 * 23.7 15.0 158 ----- ----- Basin Index (%) 135* 143 WIND RIVER Burroughs Creek 8750 11.1 -M * 29.4 -M * Castle Creek 8400 -M -M * -M -M * Cold Springs 9630 7.9 .8 988 22.6 13.9 163 Deer Park 9700 31.9 14.2 225 43.5 25.4 171 Hobbs Park 10100 31.3 15.6 201 34.9 18.5 189 Kirwin 9550 -M 10.7 * -M 15.2 * Little Warm 9370 13.4 6.5 206 27.6 16.8 164 Owl Creek 8975 .0 .3 0* 15.6 9.1 171 South Pass 9040 28.2 10.9 259 33.9 21.9 155 St. Lawrence Alt 8620 .0 .4 0* 20.8 13.0 160 Togwotee Pass 9580 32.5 25.1 129 43.3 29.0 149 Townsend Creek 8700 14.1 2.3 613 28.4 16.5 172 ----- ----- Basin Index (%) 209 165 BIGHORN BASIN Bald Mtn. 9380 20.9 20.8 100 21.6 21.5 100 Bear Trap Meadow 8200 .0 .0 * 15.0 12.0 125 Bone Springs Div 9350 19.3 16.3 118 22.4 20.1 111 Grave Springs 8550 6.7 7.1 94 13.8 14.6 95 Kirwin 9550 -M 10.7 * -M 15.2 * Marquette 8760 15.1 -M * 23.9 -M * Middle Powder 7760 6.9 9.9 70 14.7 15.7 94 Owl Creek 8975 .0 .3 0* 15.6 9.1 171 Powder River Pass 9480 5.6 8.7 64 18.2 16.6 110 Shell Creek 9580 15.8 16.8 94 18.7 18.0 104 Timber Creek 7950 .1 .8 12 15.1 11.6 130 ----- ----- Basin Index (%) 93 111 SHOSHONE RIVER Blackwater 9780 39.7 24.6 161 46.6 25.1 186 Evening Star 9200 34.8 25.5 136 49.6 32.3 154 Marquette 8760 15.1 -M * 23.9 -M * Sylvan Road 7120 .0 .2 0* 32.3 19.6 165 Younts Peak 8350 8.6 14.5 59 33.7 18.9 178 ----- ----- Basin Index (%) 128 169 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 15.0 12.0 125 Cloud Peak Reservoir 9860 18.6 16.6 112 26.5 18.8 141 Grave Springs 8550 6.7 7.1 94 13.8 14.6 95 Hansen Sawmill 8360 9.7 .4 2425* 18.9 12.3 154 Middle Powder 7760 6.9 9.9 70 14.7 15.7 94 Powder River Pass 9480 5.6 8.7 64 18.2 16.6 110 Soldier Park 8720 11.4 -M * 20.8 -M * ----- ----- Basin Index (%) 111 119 TONGUE RIVER Big Goose 7990 10.4 9.6 108 20.2 16.5 122 Bone Springs Div 9350 19.3 16.3 118 22.4 20.1 111 Burgess Junction 7880 9.0 11.2 80 16.4 16.4 100 Dome Lake 8880 15.1 10.7 141 22.2 18.4 121 Little Goose 8870 13.6 -M * 24.3 -M * Sucker Creek 8880 11.6 12.2 95 19.4 19.5 99 Tie Creek 6870 .2 .6 33 19.9 16.7 119 ----- ----- Basin Index (%) 108 112 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 12.4 14.2 87 ----- ----- Basin Index (%) * 87 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 12.3 16.0 77 North Rapid Creek 6130 .0 .0 * 10.3 14.1 73 ----- ----- Basin Index (%) * 75 UPPER N. PLATTE Arapaho Ridge 10960 22.7 22.1 103 30.4 28.0 109 Blackhall Mtn 9820 31.9 -M * 42.3 -M * Columbine 9160 -M 10.3 * -M 29.9 * Divide Peak 8880 2.2 12.2 18 26.4 25.8 102 Joe Wright 10120 16.1 23.1 70 34.0 31.9 107 Laprele Creek 8375 .3 .6 50* 16.0 16.3 98 Med Bow 10500 37.3 -M * 41.3 -M * North French Creek 10130 24.4 32.3 76 34.3 32.8 105 Never Summer 10280 23.0 22.2 104 23.1 -M * Old Battle 10000 -M 36.4 * -M 41.3 * Rawah 9020 .1 1.8 6 20.9 18.6 112 Sage Creek Basin 7850 -M .0 * 18.2 17.1 106 Sand Lake 10050 32.3 31.3 103 32.3 31.0 104 South Brush Creek 8440 .0 2.8 0 17.1 19.4 88 Tower 10500 42.7 50.7 84 52.0 47.0 111 Webber Springs 9250 15.7 17.7 89 37.5 31.5 119 Willow Creek Pass 9540 15.0 12.2 123 21.0 16.7 126 Zirkel 9340 15.6 18.3 85 47.4 33.1 143 ----- ----- Basin Index (%) 85 111 SWEETWATER Deer Park 9700 31.9 14.2 225 43.5 25.4 171 Larsen Creek 9000 1.8 5.6 32 26.2 -M * South Pass 9040 28.2 10.9 259 33.9 21.9 155 ----- ----- Basin Index (%) 202 164 LOWER N. PLATTE Casper Mtn. 7900 4.5 10.4 43 19.7 19.8 99 Laprele Creek 8375 .3 .6 50* 16.0 16.3 98 Reno Hill 8400 4.5 8.9 51 20.2 20.6 98 Windy Peak 7900 .1 .0 * 15.4 14.1 109 ----- ----- Basin Index (%) 47 101 LARAMIE RIVER Brooklyn Lake 10240 16.1 20.5 79 27.0 26.4 102 Cinnabar Park 9574 9.2 16.3 56 27.0 29.0 93 Crow Creek 8330 .0 .0 * 12.5 14.7 85 Deadman Hill 10220 17.9 18.4 97 25.2 22.1 114 Rawah 9020 .1 1.8 6 20.9 18.6 112 Roach 9700 -M 14.6 * -M 23.7 * ----- ----- Basin Index (%) 76 102 S. PLATTE Black Mountain 8920 -M -M * 16.8 -M * Crow Creek 8330 .0 .0 * 12.5 14.7 85 Deadman Hill 10220 17.9 18.4 97 25.2 22.1 114 ----- ----- Basin Index (%) 97* 102 LITTLE SNAKE RIVER Battle Mountain 7440 -M .0 * -M 18.3 * Divide Peak 8880 2.2 12.2 18 26.4 25.8 102 Elk River 8700 .1 5.2 2 23.2 24.1 96 Little Snake River 8915 -M 19.3 * -M 34.8 * Old Battle 10000 -M 36.4 * -M 41.3 * Sage Creek Basin 7850 -M .0 * 18.2 17.1 106 Sandstone RS 8150 .0 .0 * 19.7 22.1 89 Whiskey Park 8950 20.6 25.6 80 35.4 33.3 106 ----- ----- Basin Index (%) 53* 100 UPPER GREEN RIVER Big Sandy Opening 9080 14.5 8.4 173 25.8 16.4 157 Blind Bull Sum 8650 -M 22.2 * 39.2 22.6 173 East Rim Divide 7930 .1 5.0 2 23.1 13.8 167 Elkhart Park G.S. 9400 13.8 9.2 150 26.6 16.3 163 Gros Ventre Summit 8750 15.3 9.2 166 26.7 15.6 171 Gunsight Pass 9820 21.2 12.4 171 28.7 17.3 166 Kendall R.S. 7740 2.6 .0 * 31.4 16.4 191 Loomis Park 8240 15.6 6.5 240 35.2 20.1 175 New Fork Lake 8340 -M 1.7 * -M 13.1 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 1.9 6.4 30 29.3 16.5 178 Spring Creek Divide 9000 40.7 23.1 176 44.9 27.5 163 Triple Peak 8500 26.7 13.8 193 44.9 29.6 152 ----- ----- Basin Index (%) 162 168 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 -M * 19.0 -M * Buck Pasture 9632 -M -M * -M -M * EF Blacks Fork GS 9360 -M -M * -M -M * Hams Fork 7840 .0 .0 * 24.0 14.1 170 Hewinta 9500 -M .3 * -M 17.3 * Hickerson Park 9122 .1 .0 * 15.0 13.1 115 Hole-in-Rock 9168 -M .0 * -M 12.6 * Indian Creek 9425 36.2 21.3 170 45.2 26.5 171 Kelley R.S. 8180 10.2 7.4 138 34.0 21.4 159 Spirit Lk 10235 -M -M * -M -M * Steel Creek Park 10158 17.4 17.2 101 25.5 20.5 124 ----- ----- Basin Index (%) 139* 150* UPPER BEAR RIVER Bear River RS 8777 .0 -M * 21.4 -M * Bug Lake 7987 -M 11.4 * -M 22.9 * Burts Miller Ranch 8000 -M -M * -M -M * Chalk Creek #1 9171 26.7 20.3 132 41.0 30.2 136 Hayden Fork 9130 1.8 4.5 40 32.7 25.3 129 Kelley R.S. 8180 10.2 7.4 138 34.0 21.4 159 Lily Lake 9133 -M 2.8 * -M 20.9 * Monte Cristo 8932 29.9 20.1 149 44.7 31.1 144 Salt River Summit 7760 6.0 2.7 222 32.0 19.4 165 ----- ----- Basin Index (%) 136 145 ----------------------------------------------------------------------------- -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.