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: APRIL 29 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 6.8 10.0 68 21.2 22.6 94 Black Bear 8170 30.1 37.3 81 36.8 41.4 89 Blind Bull Sum 8650 25.4 23.7 107 17.5 21.1 83 Cottonwood Creek 7670 17.6 16.0 110 29.0 27.1 107 East Rim Divide 7930 .0 8.4 0 12.0 12.7 94 Grand Targhee 9260 41.7 44.1 95 34.2 34.1 100 Granite Creek 6770 5.5 8.6 64 18.8 21.1 89 Grassy Lake 7265 20.9 29.7 70 36.7 38.9 94 Gros Ventre Summit 8750 9.8 11.8 83 12.0 14.4 83 Gunsight Pass 9820 13.9 13.0 107 16.2 15.9 102 Lewis Lake Divide 7850 21.0 30.4 69 33.1 38.2 87 Phillips Bench 8200 18.9 25.6 74 27.7 30.3 91 Salt River Summit 7760 6.7 8.1 83 17.2 18.2 95 Snake River Station 6920 4.9 8.4 58 23.3 24.5 95 Spring Creek Divide 9000 25.4 24.3 105 25.2 25.9 97 Thumb Divide 7980 4.7 13.3 35 15.9 20.7 77 Togwotee Pass 9580 22.2 24.7 90 26.7 27.0 99 Two Ocean Plateau 9240 26.2 29.6 89 26.0 29.8 87 Willow Creek 8380 22.5 24.1 93 36.4 37.1 98 Younts Peak 8350 5.3 15.3 35 14.4 17.4 83 ----- ----- Basin Index (%) 81 93 MADISON-GALLATIN Black Bear 8170 30.1 37.3 81 36.8 41.4 89 Canyon 7870 6.2 11.0 56 14.1 17.8 79 Madison Plateau 7750 17.5 21.9 80 24.2 28.6 85 West Yellowstone 6700 .0 3.1 0 14.5 15.8 92 Whiskey Creek 6800 8.8 15.1 58 17.8 22.1 81 ----- ----- Basin Index (%) 71 85 YELLOWSTONE Beartooth Lake 9360 18.6 23.1 81 19.3 21.7 89 Burnt Mtn 5880 .2 .0 * 13.6 15.4 88 Canyon 7870 6.2 11.0 56 14.1 17.8 79 Cole Creek 7850 11.7 16.4 71 15.0 16.0 94 Evening Star 9200 24.9 24.8 100 30.6 30.1 102 Fisher Creek 9100 27.6 33.0 84 27.2 34.8 78 Northeast Entrance 7350 .0 4.0 0 12.2 13.6 90 Parker Peak 9400 20.0 21.5 93 22.7 19.8 115 Sylvan Lake 8420 13.4 20.2 66 25.2 24.7 102 Thumb Divide 7980 4.7 13.3 35 15.9 20.7 77 Two Ocean Plateau 9240 26.2 29.6 89 26.0 29.8 87 White Mill 8700 20.9 23.8 88 22.6 26.0 87 Wolverine 7650 .0 3.6 0 13.1 13.6 96 ----- ----- Basin Index (%) 78 91 WIND RIVER Burroughs Creek 8750 6.5 -M * 14.5 -M * Castle Creek 8400 .0 -M * 8.6 -M * Cold Springs 9630 6.9 1.7 406 12.2 12.1 101 Deer Park 9700 18.7 16.2 115 22.0 23.1 95 Hobbs Park 10100 19.7 15.9 124 20.5 16.4 125 Kirwin 9550 12.6 10.3 122 15.8 13.5 117 Little Warm 9370 7.8 9.0 87 12.5 15.1 83 Owl Creek 8975 2.6 1.4 186 8.3 7.7 108 South Pass 9040 16.0 15.1 106 16.6 20.1 83 St. Lawrence Alt 8620 4.9 3.4 144 12.7 11.3 112 Togwotee Pass 9580 22.2 24.7 90 26.7 27.0 99 Townsend Creek 8700 12.0 8.0 150 17.2 14.7 117 ----- ----- Basin Index (%) 117 102 BIGHORN BASIN Bald Mtn. 9380 17.0 20.5 83 14.8 19.4 76 Bear Trap Meadow 8200 3.7 1.3 285 9.5 10.3 92 Bone Springs Div 9350 14.6 16.5 88 14.0 17.9 78 Grave Springs 8550 9.1 9.3 98 9.9 12.5 79 Kirwin 9550 12.6 10.3 122 15.8 13.5 117 Marquette 8760 8.3 -M * 14.0 -M * Middle Powder 7760 13.1 11.9 110 11.8 13.9 85 Owl Creek 8975 2.6 1.4 186 8.3 7.7 108 Powder River Pass 9480 8.1 9.7 84 11.2 14.8 76 Shell Creek 9580 14.2 16.0 89 12.8 16.0 80 Timber Creek 7950 5.5 3.4 162 13.8 9.7 142 ----- ----- Basin Index (%) 100 90 SHOSHONE RIVER Blackwater 9780 24.0 25.0 96 26.9 23.1 116 Evening Star 9200 24.9 24.8 100 30.6 30.1 102 Marquette 8760 8.3 -M * 14.0 -M * Sylvan Road 7120 .0 6.7 0 16.4 18.4 89 Younts Peak 8350 5.3 15.3 35 14.4 17.4 83 ----- ----- Basin Index (%) 75 99 POWDER RIVER Bear Trap Meadow 8200 3.7 1.3 285 9.5 10.3 92 Cloud Peak Reservoir 9860 13.9 16.5 84 17.2 16.2 106 Grave Springs 8550 9.1 9.3 98 9.9 12.5 79 Hansen Sawmill 8360 4.5 3.3 136 10.6 10.6 100 Middle Powder 7760 13.1 11.9 110 11.8 13.9 85 Powder River Pass 9480 8.1 9.7 84 11.2 14.8 76 Soldier Park 8720 1.6 -M * 10.7 -M * ----- ----- Basin Index (%) 101 90 TONGUE RIVER Big Goose 7990 10.1 9.2 110 13.5 13.7 99 Bone Springs Div 9350 14.6 16.5 88 14.0 17.9 78 Burgess Junction 7880 11.5 12.1 95 13.2 14.5 91 Dome Lake 8880 10.9 11.6 94 14.6 16.1 91 Little Goose 8870 11.8 -M * 16.2 -M * Sucker Creek 8880 11.4 12.4 92 15.4 17.0 91 Tie Creek 6870 .4 2.8 14 12.2 13.9 88 ----- ----- Basin Index (%) 91 89 BELLE FOURCHE Cole Canyon 5910 .8 .3 267* 11.3 11.5 98 ----- ----- Basin Index (%) 267* 98 CHEYENNE RIVER BASIN Blind Park 6890 .0 1.8 0 12.1 14.0 86 North Rapid Creek 6130 .0 1.8 0 9.5 11.9 80 ----- ----- Basin Index (%) 0 83 UPPER N. PLATTE Arapaho Ridge 10960 26.8 22.3 120 28.4 25.9 110 Blackhall Mtn 9820 35.3 -M * 35.5 -M * Columbine 9160 20.6 19.1 108 29.2 28.2 104 Divide Peak 8880 20.5 18.0 114 30.0 24.0 125 Joe Wright 10120 -M 23.5 * -M 29.5 * Laprele Creek 8375 8.3 6.7 124 14.4 14.8 97 Med Bow 10500 38.3 -M * 37.4 -M * North French Creek 10130 32.3 33.0 98 32.8 30.4 108 Never Summer 10280 22.8 21.6 106 20.3 -M * Old Battle 10000 37.1 34.6 107 34.9 38.8 90 Rawah 9020 12.2 7.0 174 21.9 17.0 129 Sage Creek Basin 7850 11.6 1.2 967* 16.0 16.0 100 Sand Lake 10050 33.2 31.3 106 32.3 28.7 113 South Brush Creek 8440 9.4 9.8 96 18.7 17.6 106 Tower 10500 45.3 49.8 91 43.7 44.3 99 Webber Springs 9250 23.4 22.0 106 30.6 29.7 103 Willow Creek Pass 9540 17.7 13.9 127 18.4 15.5 119 Zirkel 9340 25.7 21.4 120 34.9 30.7 114 ----- ----- Basin Index (%) 111 107 SWEETWATER Deer Park 9700 18.7 16.2 115 22.0 23.1 95 Larsen Creek 9000 6.3 9.4 67 15.8 -M * South Pass 9040 16.0 15.1 106 16.6 20.1 83 ----- ----- Basin Index (%) 101 89 LOWER N. PLATTE Casper Mtn. 7900 19.8 14.0 141 19.6 17.7 111 Laprele Creek 8375 8.3 6.7 124 14.4 14.8 97 Reno Hill 8400 18.2 13.1 139 23.1 18.6 124 Windy Peak 7900 8.4 4.7 179 14.0 12.8 109 ----- ----- Basin Index (%) 142 111 LARAMIE RIVER Brooklyn Lake 10240 25.7 23.2 111 27.8 24.4 114 Cinnabar Park 9574 22.1 19.9 111 27.5 26.8 103 Crow Creek 8330 7.6 .0 * 19.2 13.3 144 Deadman Hill 10220 23.2 18.8 123 23.6 20.4 116 Rawah 9020 12.2 7.0 174 21.9 17.0 129 Roach 9700 21.8 17.3 126 26.4 22.0 120 ----- ----- Basin Index (%) 131 118 S. PLATTE Black Mountain 8920 -M -M * 20.9 -M * Crow Creek 8330 7.6 .0 * 19.2 13.3 144 Deadman Hill 10220 23.2 18.8 123 23.6 20.4 116 ----- ----- Basin Index (%) 164* 127 LITTLE SNAKE RIVER Battle Mountain 7440 5.1 .0 * 19.4 17.0 114 Divide Peak 8880 20.5 18.0 114 30.0 24.0 125 Elk River 8700 13.1 13.8 95 21.7 22.4 97 Little Snake River 8915 25.0 22.7 110 37.8 32.4 117 Old Battle 10000 37.1 34.6 107 34.9 38.8 90 Sage Creek Basin 7850 11.6 1.2 967* 16.0 16.0 100 Sandstone RS 8150 7.7 6.7 115 15.7 20.6 76 Whiskey Park 8950 29.2 26.1 112 33.9 31.1 109 ----- ----- Basin Index (%) 121 104 UPPER GREEN RIVER Big Sandy Opening 9080 11.6 11.3 103 14.3 15.0 95 Blind Bull Sum 8650 25.4 23.7 107 17.5 21.1 83 East Rim Divide 7930 .0 8.4 0 12.0 12.7 94 Elkhart Park G.S. 9400 9.0 11.6 78 13.3 14.8 90 Gros Ventre Summit 8750 9.8 11.8 83 12.0 14.4 83 Gunsight Pass 9820 13.9 13.0 107 16.2 15.9 102 Kendall R.S. 7740 -M 5.2 * 12.8 15.4 83 Loomis Park 8240 8.0 11.3 71 17.6 18.7 94 New Fork Lake 8340 2.7 6.8 40 11.9 11.9 100 Pocket Creek 9360 9.1 -M * 11.7 -M * Snider Basin 8060 5.9 9.7 61 15.0 15.4 97 Spring Creek Divide 9000 25.4 24.3 105 25.2 25.9 97 Triple Peak 8500 19.2 18.2 105 28.7 27.6 104 ----- ----- Basin Index (%) 87 94 LOWER GREEN RIVER Blacks Fork Jct 8870 8.9 -M * 14.7 -M * Buck Pasture 9700 12.2 -M * 20.2 -M * EF Blacks Fork GS 9360 8.0 -M * 14.1 -M * Hams Fork 7840 3.6 3.7 97 11.8 12.9 91 Hewinta 9519 8.8 5.3 166 16.7 15.9 105 Hickerson Park 9145 9.9 4.7 211 15.6 11.8 132 Hole-in-Rock 9150 4.9 3.3 148 15.1 11.3 134 Indian Creek 9425 20.7 23.5 88 20.1 24.7 81 Kelley R.S. 8180 9.7 11.8 82 16.9 19.9 85 Spirit Lk 10235 18.8 -M * 22.2 -M * Steel Creek Park 10200 20.0 16.9 118 22.7 18.8 121 ----- ----- Basin Index (%) 112 103 UPPER BEAR RIVER Bear River RS 8777 1.2 -M * 14.4 -M * Bug Lake 7950 12.8 15.7 82 20.9 21.4 98 Burts Miller Ranch 8000 .1 -M * 7.2 -M * Chalk Creek #1 8993 17.8 24.6 72 25.2 28.1 90 Hayden Fork 9212 7.6 9.7 78 22.8 23.5 97 Kelley R.S. 8180 9.7 11.8 82 16.9 19.9 85 Lily Lake 9156 10.5 9.8 107 16.8 19.3 87 Monte Cristo 8960 24.4 27.1 90 30.8 28.9 107 Salt River Summit 7760 6.7 8.1 83 17.2 18.2 95 ----- ----- Basin Index (%) 84 95 ----------------------------------------------------------------------------- -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.