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 10 , 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 4.4 0 21.5 23.6 91 Black Bear 8170 25.4 36.8 69 37.5 43.1 87 Blind Bull Sum 8650 26.3 22.4 117 18.9 22.2 85 Cottonwood Creek 7670 11.7 12.8 91 31.5 28.8 109 East Rim Divide 7930 .0 5.9 0 13.6 13.5 101 Grand Targhee 9260 38.1 46.4 82 35.2 36.1 98 Granite Creek 6770 .0 5.5 0 20.4 22.1 92 Grassy Lake 7265 12.3 25.9 47 37.4 40.6 92 Gros Ventre Summit 8750 5.6 9.6 58 12.9 15.4 84 Gunsight Pass 9820 12.1 12.1 100 17.4 16.9 103 Lewis Lake Divide 7850 12.7 29.3 43 33.8 39.7 85 Phillips Bench 8200 12.9 23.1 56 29.2 31.8 92 Salt River Summit 7760 .0 4.5 0 19.1 19.1 100 Snake River Station 6920 .0 2.5 0 23.7 25.6 93 Spring Creek Divide 9000 23.4 23.7 99 27.6 27.1 102 Thumb Divide 7980 .0 8.4 0 16.1 21.8 74 Togwotee Pass 9580 19.8 25.4 78 27.8 28.5 98 Two Ocean Plateau 9240 20.9 29.6 71 26.2 31.2 84 Willow Creek 8380 15.0 21.1 71 38.4 39.2 98 Younts Peak 8350 .0 15.4 0 15.6 18.5 84 ----- ----- Basin Index (%) 65 92 MADISON-GALLATIN Black Bear 8170 25.4 36.8 69 37.5 43.1 87 Canyon 7870 .2 7.4 3 14.9 18.8 79 Madison Plateau 7750 10.8 20.0 54 24.6 30.0 82 West Yellowstone 6700 .0 .0 * 14.7 16.6 89 Whiskey Creek 6800 3.3 10.7 31 18.1 23.1 78 ----- ----- Basin Index (%) 53 83 YELLOWSTONE Beartooth Lake 9360 16.5 23.0 72 19.6 23.1 85 Burnt Mtn 5880 .2 .0 * 14.7 17.4 84 Canyon 7870 .2 7.4 3 14.9 18.8 79 Cole Creek 7850 9.7 17.2 56 15.6 18.0 87 Evening Star 9200 20.1 25.4 79 31.2 31.8 98 Fisher Creek 9100 25.0 34.3 73 27.4 36.6 75 Northeast Entrance 7350 .0 .9 0* 12.3 14.6 84 Parker Peak 9400 14.7 22.0 67 23.1 21.2 109 Sylvan Lake 8420 6.7 18.1 37 25.7 26.3 98 Thumb Divide 7980 .0 8.4 0 16.1 21.8 74 Two Ocean Plateau 9240 20.9 29.6 71 26.2 31.2 84 White Mill 8700 16.6 24.7 67 22.8 27.5 83 Wolverine 7650 .0 .0 * 13.3 14.6 91 ----- ----- Basin Index (%) 62 87 WIND RIVER Burroughs Creek 8750 2.6 -M * 16.5 -M * Castle Creek 8400 .0 -M * 10.3 -M * Cold Springs 9630 7.3 1.5 487 16.2 13.4 121 Deer Park 9700 20.6 14.4 143 26.6 24.6 108 Hobbs Park 10100 23.5 15.9 148 26.2 17.8 147 Kirwin 9550 12.7 10.9 117 18.6 14.8 126 Little Warm 9370 6.2 6.6 94 14.4 16.2 89 Owl Creek 8975 1.1 .5 220* 11.6 8.6 135 South Pass 9040 17.7 11.8 150 21.7 21.3 102 St. Lawrence Alt 8620 4.4 1.0 440 17.8 12.4 144 Togwotee Pass 9580 19.8 25.4 78 27.8 28.5 98 Townsend Creek 8700 12.9 3.9 331 23.5 15.8 149 ----- ----- Basin Index (%) 137 118 BIGHORN BASIN Bald Mtn. 9380 14.2 20.6 69 15.5 21.1 73 Bear Trap Meadow 8200 .1 .0 * 10.4 11.6 90 Bone Springs Div 9350 11.9 16.6 72 14.9 19.7 76 Grave Springs 8550 6.1 7.7 79 10.8 14.1 77 Kirwin 9550 12.7 10.9 117 18.6 14.8 126 Marquette 8760 4.4 -M * 15.0 -M * Middle Powder 7760 8.0 10.8 74 12.5 15.4 81 Owl Creek 8975 1.1 .5 220* 11.6 8.6 135 Powder River Pass 9480 3.7 9.0 41 11.6 16.3 71 Shell Creek 9580 12.2 16.8 73 13.4 17.6 76 Timber Creek 7950 .6 1.5 40 16.3 11.0 148 ----- ----- Basin Index (%) 75 90 SHOSHONE RIVER Blackwater 9780 21.5 24.8 87 27.6 24.6 112 Evening Star 9200 20.1 25.4 79 31.2 31.8 98 Marquette 8760 4.4 -M * 15.0 -M * Sylvan Road 7120 .0 1.5 0 16.5 19.3 85 Younts Peak 8350 .0 15.4 0 15.6 18.5 84 ----- ----- Basin Index (%) 62 96 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 10.4 11.6 90 Cloud Peak Reservoir 9860 12.4 16.8 74 17.8 18.2 98 Grave Springs 8550 6.1 7.7 79 10.8 14.1 77 Hansen Sawmill 8360 .0 1.2 0 11.6 11.9 97 Middle Powder 7760 8.0 10.8 74 12.5 15.4 81 Powder River Pass 9480 3.7 9.0 41 11.6 16.3 71 Soldier Park 8720 .0 -M * 11.5 -M * ----- ----- Basin Index (%) 67 85 TONGUE RIVER Big Goose 7990 7.3 10.4 70 14.2 15.7 90 Bone Springs Div 9350 11.9 16.6 72 14.9 19.7 76 Burgess Junction 7880 9.2 11.4 81 13.8 16.1 86 Dome Lake 8880 8.8 11.2 79 15.6 17.9 87 Little Goose 8870 9.5 -M * 16.9 -M * Sucker Creek 8880 9.0 12.6 71 15.6 19.0 82 Tie Creek 6870 .6 1.5 40 13.1 15.9 82 ----- ----- Basin Index (%) 73 84 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 11.6 13.5 86 ----- ----- Basin Index (%) * 86 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 12.3 15.5 79 North Rapid Creek 6130 .0 .0 * 9.8 13.4 73 ----- ----- Basin Index (%) * 76 UPPER N. PLATTE Arapaho Ridge 10960 28.6 22.4 128 31.2 27.5 113 Blackhall Mtn 9820 37.2 -M * 39.6 -M * Columbine 9160 18.0 12.7 142 31.6 29.6 107 Divide Peak 8880 21.3 14.3 149 34.3 25.5 135 Joe Wright 10120 -M 23.2 * -M 31.4 * Laprele Creek 8375 4.9 2.8 175 17.5 16.1 109 Med Bow 10500 41.8 -M * 42.2 -M * North French Creek 10130 34.4 32.7 105 37.0 32.4 114 Never Summer 10280 23.7 22.2 107 22.2 -M * Old Battle 10000 39.9 36.8 108 39.4 40.8 97 Rawah 9020 10.6 2.7 393 24.4 18.2 134 Sage Creek Basin 7850 7.7 .0 * 18.1 16.9 107 Sand Lake 10050 35.8 31.8 113 36.1 30.5 118 South Brush Creek 8440 7.3 5.2 140 21.6 19.1 113 Tower 10500 48.4 51.4 94 47.7 46.4 103 Webber Springs 9250 23.5 19.4 121 34.2 31.1 110 Willow Creek Pass 9540 17.9 13.4 134 20.1 16.5 122 Zirkel 9340 -M 19.7 * 37.9 32.4 117 ----- ----- Basin Index (%) 120 113 SWEETWATER Deer Park 9700 20.6 14.4 143 26.6 24.6 108 Larsen Creek 9000 2.3 6.5 35 17.8 -M * South Pass 9040 17.7 11.8 150 21.7 21.3 102 ----- ----- Basin Index (%) 124 105 LOWER N. PLATTE Casper Mtn. 7900 16.3 11.4 143 22.5 19.4 116 Laprele Creek 8375 4.9 2.8 175 17.5 16.1 109 Reno Hill 8400 15.7 10.5 150 25.3 20.1 126 Windy Peak 7900 5.9 .8 738 18.2 13.9 131 ----- ----- Basin Index (%) 168 120 LARAMIE RIVER Brooklyn Lake 10240 26.4 21.4 123 31.1 26.0 120 Cinnabar Park 9574 23.5 17.4 135 31.1 28.2 110 Crow Creek 8330 -M .0 * -M 14.3 * Deadman Hill 10220 24.1 18.5 130 26.1 21.7 120 Rawah 9020 10.6 2.7 393 24.4 18.2 134 Roach 9700 22.8 15.9 143 30.0 23.3 129 ----- ----- Basin Index (%) 142 122 S. PLATTE Black Mountain 8920 11.6 -M * 23.1 -M * Crow Creek 8330 -M .0 * -M 14.3 * Deadman Hill 10220 24.1 18.5 130 26.1 21.7 120 ----- ----- Basin Index (%) 130* 120* LITTLE SNAKE RIVER Battle Mountain 7440 .8 .0 * 23.2 18.0 129 Divide Peak 8880 21.3 14.3 149 34.3 25.5 135 Elk River 8700 12.1 7.8 155 23.7 23.7 100 Little Snake River 8915 26.4 20.4 129 42.3 34.4 123 Old Battle 10000 39.9 36.8 108 39.4 40.8 97 Sage Creek Basin 7850 7.7 .0 * 18.1 16.9 107 Sandstone RS 8150 7.4 1.9 389 19.7 21.8 90 Whiskey Park 8950 32.2 26.8 120 38.3 32.9 116 ----- ----- Basin Index (%) 137 112 UPPER GREEN RIVER Big Sandy Opening 9080 9.7 8.6 113 16.5 16.1 102 Blind Bull Sum 8650 26.3 22.4 117 18.9 22.2 85 East Rim Divide 7930 .0 5.9 0 13.6 13.5 101 Elkhart Park G.S. 9400 6.7 9.6 70 14.9 15.8 94 Gros Ventre Summit 8750 5.6 9.6 58 12.9 15.4 84 Gunsight Pass 9820 12.1 12.1 100 17.4 16.9 103 Kendall R.S. 7740 -M .0 * 14.8 16.2 91 Loomis Park 8240 2.8 7.3 38 19.1 19.7 97 New Fork Lake 8340 .0 2.6 0 14.1 12.8 110 Pocket Creek 9360 8.2 -M * 13.7 -M * Snider Basin 8060 .0 7.4 0 17.4 16.2 107 Spring Creek Divide 9000 23.4 23.7 99 27.6 27.1 102 Triple Peak 8500 13.7 14.9 92 31.0 29.1 107 ----- ----- Basin Index (%) 81 99 LOWER GREEN RIVER Blacks Fork Jct 8870 5.1 -M * 16.9 -M * Buck Pasture 9700 11.9 -M * 23.3 -M * EF Blacks Fork GS 9360 6.8 -M * 17.8 -M * Hams Fork 7840 .0 .1 0* 14.3 13.8 104 Hewinta 9519 8.2 2.0 410 19.4 17.1 113 Hickerson Park 9145 8.7 .1 8700* 19.4 12.8 152 Hole-in-Rock 9150 2.3 .0 * 18.1 12.3 147 Indian Creek 9425 18.2 21.0 87 22.4 26.0 86 Kelley R.S. 8180 4.7 8.4 56 19.8 21.0 94 Spirit Lk 10235 21.1 -M * 26.3 -M * Steel Creek Park 10200 22.5 17.7 127 26.6 20.1 132 ----- ----- Basin Index (%) 131* 114 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 16.7 -M * Bug Lake 7950 7.7 12.2 63 22.4 22.6 99 Burts Miller Ranch 8000 .0 -M * 8.8 -M * Chalk Creek #1 8993 15.1 21.5 70 27.2 29.7 92 Hayden Fork 9212 3.2 5.9 54 24.6 24.8 99 Kelley R.S. 8180 4.7 8.4 56 19.8 21.0 94 Lily Lake 9156 8.5 5.4 157 19.6 20.5 96 Monte Cristo 8960 21.4 21.5 100 32.2 30.6 105 Salt River Summit 7760 .0 4.5 0 19.1 19.1 100 ----- ----- Basin Index (%) 76 98 ----------------------------------------------------------------------------- -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.