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 TUESDAY: MAY 17 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .0 .0 * 21.6 24.2 89 Black Bear 8170 21.8 35.3 62 38.3 44.3 86 Blind Bull Sum 8650 22.3 21.5 104 19.2 23.0 83 Cottonwood Creek 7670 7.5 8.9 84 32.2 29.6 109 East Rim Divide 7930 .0 2.6 0 13.8 14.0 99 Grand Targhee 9260 -M 44.0 * -M 36.7 * Granite Creek 6770 .0 .0 * 20.5 22.7 90 Grassy Lake 7265 8.2 20.4 40 38.1 41.5 92 Gros Ventre Summit 8750 1.7 7.6 22 12.9 15.9 81 Gunsight Pass 9820 10.3 11.7 88 17.8 17.5 102 Lewis Lake Divide 7850 8.1 24.5 33 34.0 40.6 84 Phillips Bench 8200 -M 21.0 * -M 32.6 * Salt River Summit 7760 -M .6 * -M 19.7 * Snake River Station 6920 .0 .0 * 24.1 26.2 92 Spring Creek Divide 9000 21.4 22.0 97 28.5 27.8 103 Thumb Divide 7980 .0 3.6 0 16.3 22.5 72 Togwotee Pass 9580 19.1 23.8 80 29.0 29.4 99 Two Ocean Plateau 9240 -M 29.0 * -M 32.4 * Willow Creek 8380 -M 18.8 * -M 40.4 * Younts Peak 8350 .0 12.9 0 16.2 19.2 84 ----- ----- Basin Index (%) 62 91 MADISON-GALLATIN Black Bear 8170 21.8 35.3 62 38.3 44.3 86 Canyon 7870 .0 4.2 0 14.9 19.6 76 Madison Plateau 7750 7.2 15.9 45 25.1 31.1 81 West Yellowstone 6700 .0 .0 * 14.9 17.4 86 Whiskey Creek 6800 .0 7.6 0 18.8 24.0 78 ----- ----- Basin Index (%) 46 82 YELLOWSTONE Beartooth Lake 9360 15.7 22.3 70 20.2 23.9 85 Burnt Mtn 5880 .0 .0 * 17.1 18.9 90 Canyon 7870 .0 4.2 0 14.9 19.6 76 Cole Creek 7850 11.4 16.8 68 18.4 19.2 96 Evening Star 9200 19.9 24.9 80 31.8 32.9 97 Fisher Creek 9100 24.0 33.6 71 27.8 37.9 73 Northeast Entrance 7350 .0 .0 * 12.6 15.3 82 Parker Peak 9400 13.2 20.9 63 23.9 22.1 108 Sylvan Lake 8420 3.6 16.3 22 26.2 27.2 96 Thumb Divide 7980 .0 3.6 0 16.3 22.5 72 Two Ocean Plateau 9240 -M 29.0 * -M 32.4 * White Mill 8700 15.1 23.7 64 23.4 28.6 82 Wolverine 7650 .0 .0 * 13.8 15.3 90 ----- ----- Basin Index (%) 62 87 WIND RIVER Burroughs Creek 8750 .0 -M * 17.3 -M * Castle Creek 8400 .0 -M * 11.0 -M * Cold Springs 9630 6.5 .0 * 17.1 14.2 120 Deer Park 9700 18.4 12.4 148 26.9 25.7 105 Hobbs Park 10100 22.9 14.4 159 26.7 19.0 141 Kirwin 9550 11.1 9.7 114 19.2 15.6 123 Little Warm 9370 3.3 4.9 67 14.8 17.1 87 Owl Creek 8975 .6 .0 * 12.7 9.4 135 South Pass 9040 15.1 9.2 164 21.9 22.2 99 St. Lawrence Alt 8620 3.3 .0 * 19.0 13.2 144 Togwotee Pass 9580 19.1 23.8 80 29.0 29.4 99 Townsend Creek 8700 11.1 .3 3700* 23.9 16.8 142 ----- ----- Basin Index (%) 149 116 BIGHORN BASIN Bald Mtn. 9380 15.0 20.3 74 16.5 21.8 76 Bear Trap Meadow 8200 .6 .0 * 11.5 12.4 93 Bone Springs Div 9350 11.7 15.3 76 15.3 20.5 75 Grave Springs 8550 5.9 5.2 113 11.6 14.8 78 Kirwin 9550 11.1 9.7 114 19.2 15.6 123 Marquette 8760 4.6 -M * 16.3 -M * Middle Powder 7760 8.6 7.7 112 13.5 16.0 84 Owl Creek 8975 .6 .0 * 12.7 9.4 135 Powder River Pass 9480 3.5 7.4 47 12.3 17.0 72 Shell Creek 9580 12.7 16.1 79 14.2 18.3 78 Timber Creek 7950 .0 .0 * 17.8 11.9 150 ----- ----- Basin Index (%) 85 92 SHOSHONE RIVER Blackwater 9780 21.7 24.9 87 28.6 25.6 112 Evening Star 9200 19.9 24.9 80 31.8 32.9 97 Marquette 8760 4.6 -M * 16.3 -M * Sylvan Road 7120 .0 .0 * 17.1 20.0 86 Younts Peak 8350 .0 12.9 0 16.2 19.2 84 ----- ----- Basin Index (%) 66 96 POWDER RIVER Bear Trap Meadow 8200 .6 .0 * 11.5 12.4 93 Cloud Peak Reservoir 9860 12.5 15.8 79 19.2 19.3 99 Grave Springs 8550 5.9 5.2 113 11.6 14.8 78 Hansen Sawmill 8360 1.2 .0 * 13.1 12.6 104 Middle Powder 7760 8.6 7.7 112 13.5 16.0 84 Powder River Pass 9480 3.5 7.4 47 12.3 17.0 72 Soldier Park 8720 1.2 -M * 13.0 -M * ----- ----- Basin Index (%) 89 88 TONGUE RIVER Big Goose 7990 6.9 7.5 92 15.0 16.8 89 Bone Springs Div 9350 11.7 15.3 76 15.3 20.5 75 Burgess Junction 7880 8.6 9.8 88 14.3 16.7 86 Dome Lake 8880 8.5 8.5 100 16.4 18.8 87 Little Goose 8870 9.8 -M * 17.9 -M * Sucker Creek 8880 8.6 10.3 83 16.6 19.9 83 Tie Creek 6870 .0 .0 * 13.8 16.9 82 ----- ----- Basin Index (%) 86 83 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 12.3 14.6 84 ----- ----- Basin Index (%) * 84 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 12.6 16.4 77 North Rapid Creek 6130 .0 .0 * 10.0 14.3 70 ----- ----- Basin Index (%) * 74 UPPER N. PLATTE Arapaho Ridge 10960 28.3 20.5 138 32.3 28.4 114 Blackhall Mtn 9820 36.1 -M * 40.8 -M * Columbine 9160 13.2 6.4 206 33.1 30.4 109 Divide Peak 8880 17.6 8.6 205 35.1 26.2 134 Joe Wright 10120 -M 22.3 * -M 32.5 * Laprele Creek 8375 1.2 .0 * 17.6 16.6 106 Med Bow 10500 41.4 -M * 42.9 -M * North French Creek 10130 33.2 31.3 106 37.7 33.4 113 Never Summer 10280 23.2 21.7 107 23.1 -M * Old Battle 10000 39.7 33.9 117 41.3 41.8 99 Rawah 9020 7.3 .9 811* 25.2 18.8 134 Sage Creek Basin 7850 .8 .0 * 18.3 17.2 106 Sand Lake 10050 35.1 29.3 120 36.9 31.5 117 South Brush Creek 8440 2.9 .5 580* 22.6 19.8 114 Tower 10500 48.8 49.0 100 49.5 47.5 104 Webber Springs 9250 21.6 14.8 146 35.5 31.8 112 Willow Creek Pass 9540 15.8 10.6 149 21.3 17.1 125 Zirkel 9340 -M 14.3 * 38.8 33.3 117 ----- ----- Basin Index (%) 127 113 SWEETWATER Deer Park 9700 18.4 12.4 148 26.9 25.7 105 Larsen Creek 9000 .1 4.5 2 18.1 -M * South Pass 9040 15.1 9.2 164 21.9 22.2 99 ----- ----- Basin Index (%) 129 102 LOWER N. PLATTE Casper Mtn. 7900 14.6 7.4 197 23.2 20.1 115 Laprele Creek 8375 1.2 .0 * 17.6 16.6 106 Reno Hill 8400 14.0 6.4 219 26.0 21.0 124 Windy Peak 7900 2.5 .0 * 18.3 14.4 127 ----- ----- Basin Index (%) 234 118 LARAMIE RIVER Brooklyn Lake 10240 23.6 18.7 126 31.7 26.9 118 Cinnabar Park 9574 21.6 14.4 150 32.0 29.4 109 Crow Creek 8330 .6 .0 * -M 15.0 * Deadman Hill 10220 22.6 17.9 126 26.8 22.7 118 Rawah 9020 7.3 .9 811* 25.2 18.8 134 Roach 9700 20.6 13.1 157 31.1 24.3 128 ----- ----- Basin Index (%) 148 120 S. PLATTE Black Mountain 8920 7.2 -M * 23.8 -M * Crow Creek 8330 .6 .0 * -M 15.0 * Deadman Hill 10220 22.6 17.9 126 26.8 22.7 118 ----- ----- Basin Index (%) 130* 118* LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 24.1 18.5 130 Divide Peak 8880 17.6 8.6 205 35.1 26.2 134 Elk River 8700 8.4 1.2 700* 24.4 24.4 100 Little Snake River 8915 23.2 16.5 141 43.3 35.0 124 Old Battle 10000 39.7 33.9 117 41.3 41.8 99 Sage Creek Basin 7850 .8 .0 * 18.3 17.2 106 Sandstone RS 8150 2.8 .0 * 20.4 22.3 91 Whiskey Park 8950 36.2 23.8 152 39.5 33.7 117 ----- ----- Basin Index (%) 153 112 UPPER GREEN RIVER Big Sandy Opening 9080 5.5 6.1 90 17.0 16.6 102 Blind Bull Sum 8650 22.3 21.5 104 19.2 23.0 83 East Rim Divide 7930 .0 2.6 0 13.8 14.0 99 Elkhart Park G.S. 9400 3.5 7.5 47 15.5 16.5 94 Gros Ventre Summit 8750 1.7 7.6 22 12.9 15.9 81 Gunsight Pass 9820 10.3 11.7 88 17.8 17.5 102 Kendall R.S. 7740 -M .0 * 15.0 16.6 90 Loomis Park 8240 -M 4.8 * -M 20.4 * New Fork Lake 8340 .1 .4 25* 14.5 13.4 108 Pocket Creek 9360 5.0 -M * 14.2 -M * Snider Basin 8060 .0 2.9 0 18.0 16.6 108 Spring Creek Divide 9000 21.4 22.0 97 28.5 27.8 103 Triple Peak 8500 10.0 11.1 90 31.6 30.0 105 ----- ----- Basin Index (%) 80 98 LOWER GREEN RIVER Blacks Fork Jct 8870 1.3 -M * 18.0 -M * Buck Pasture 9700 8.7 -M * 23.9 -M * EF Blacks Fork GS 9360 3.3 -M * 19.2 -M * Hams Fork 7840 .0 .0 * 15.4 14.2 108 Hewinta 9519 -M .0 * -M 17.6 * Hickerson Park 9145 4.9 .0 * 20.2 13.3 152 Hole-in-Rock 9150 1.0 .0 * 19.9 12.8 155 Indian Creek 9425 15.8 20.5 77 23.6 26.8 88 Kelley R.S. 8180 -M 5.1 * -M 21.6 * Spirit Lk 10235 19.3 -M * 27.5 -M * Steel Creek Park 10200 21.7 15.8 137 27.7 20.8 133 ----- ----- Basin Index (%) 120* 122* UPPER BEAR RIVER Bear River RS 8777 .0 -M * 17.8 -M * Bug Lake 7950 2.7 8.4 32 22.9 23.2 99 Burts Miller Ranch 8000 .0 -M * 9.3 -M * Chalk Creek #1 8993 12.7 18.0 71 28.8 30.6 94 Hayden Fork 9212 .1 1.1 9* 25.9 25.6 101 Kelley R.S. 8180 -M 5.1 * -M 21.6 * Lily Lake 9156 4.8 .0 * 20.7 21.2 98 Monte Cristo 8960 15.5 17.5 89 32.8 31.4 104 Salt River Summit 7760 -M .6 * -M 19.7 * ----- ----- Basin Index (%) 80* 99 ----------------------------------------------------------------------------- -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.