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 22 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 9.2 11.5 80 20.9 21.9 95 Black Bear 8170 30.2 36.9 82 35.6 40.2 89 Blind Bull Sum 8650 25.1 24.2 104 17.3 20.4 85 Cottonwood Creek 7670 17.4 18.1 96 27.5 26.0 106 East Rim Divide 7930 1.5 9.4 16 11.6 12.3 94 Grand Targhee 9260 41.1 42.5 97 33.3 32.9 101 Granite Creek 6770 8.1 10.3 79 18.4 20.4 90 Grassy Lake 7265 23.5 30.8 76 36.0 37.7 95 Gros Ventre Summit 8750 10.9 13.0 84 11.7 13.8 85 Gunsight Pass 9820 13.6 13.7 99 15.7 15.0 105 Lewis Lake Divide 7850 24.3 30.6 79 32.7 37.1 88 Phillips Bench 8200 20.5 25.3 81 27.2 29.4 93 Salt River Summit 7760 7.8 9.2 85 16.3 17.5 93 Snake River Station 6920 8.2 11.1 74 23.0 23.7 97 Spring Creek Divide 9000 25.8 23.6 109 24.5 25.0 98 Thumb Divide 7980 6.8 14.4 47 15.7 19.8 79 Togwotee Pass 9580 20.9 24.2 86 25.7 25.9 99 Two Ocean Plateau 9240 25.8 28.5 91 25.8 28.8 90 Willow Creek 8380 22.6 26.6 85 34.4 35.6 97 Younts Peak 8350 7.6 15.2 50 14.0 16.8 83 ----- ----- Basin Index (%) 84 93 MADISON-GALLATIN Black Bear 8170 30.2 36.9 82 35.6 40.2 89 Canyon 7870 7.2 12.1 60 13.5 17.2 78 Madison Plateau 7750 19.3 22.9 84 23.7 27.7 86 West Yellowstone 6700 .2 6.5 3 14.2 15.2 93 Whiskey Creek 6800 11.1 15.4 72 17.7 21.4 83 ----- ----- Basin Index (%) 72 86 YELLOWSTONE Beartooth Lake 9360 18.4 23.6 78 19.2 20.9 92 Burnt Mtn 5880 .0 .0 * 12.3 14.5 85 Canyon 7870 7.2 12.1 60 13.5 17.2 78 Cole Creek 7850 11.2 16.4 68 -M 14.8 * Evening Star 9200 24.7 24.6 100 29.8 29.0 103 Fisher Creek 9100 27.6 32.8 84 26.9 33.7 80 Northeast Entrance 7350 -M 6.0 * 11.8 13.1 90 Parker Peak 9400 20.1 21.2 95 21.5 18.9 114 Sylvan Lake 8420 13.6 20.4 67 24.2 23.8 102 Thumb Divide 7980 6.8 14.4 47 15.7 19.8 79 Two Ocean Plateau 9240 25.8 28.5 91 25.8 28.8 90 White Mill 8700 21.7 23.7 92 22.4 25.1 89 Wolverine 7650 -M 6.6 * 12.1 13.0 93 ----- ----- Basin Index (%) 81 91 WIND RIVER Burroughs Creek 8750 6.5 -M * 13.1 -M * Castle Creek 8400 .0 -M * 7.5 -M * Cold Springs 9630 6.9 4.1 168 10.6 11.1 95 Deer Park 9700 16.8 16.3 103 19.6 21.8 90 Hobbs Park 10100 17.0 15.1 113 17.7 15.1 117 Kirwin 9550 11.3 10.0 113 14.8 12.7 117 Little Warm 9370 8.1 10.0 81 12.1 14.0 86 Owl Creek 8975 2.3 3.5 66 6.6 7.0 94 South Pass 9040 14.0 15.4 91 14.4 18.8 77 St. Lawrence Alt 8620 4.5 5.1 88 10.8 10.1 107 Togwotee Pass 9580 20.9 24.2 86 25.7 25.9 99 Townsend Creek 8700 10.4 9.1 114 14.5 13.5 107 ----- ----- Basin Index (%) 99 98 BIGHORN BASIN Bald Mtn. 9380 16.1 20.0 80 14.0 18.4 76 Bear Trap Meadow 8200 3.4 2.7 126 7.4 9.6 77 Bone Springs Div 9350 13.6 16.2 84 12.9 17.0 76 Grave Springs 8550 6.5 9.4 69 6.8 11.8 58 Kirwin 9550 11.3 10.0 113 14.8 12.7 117 Marquette 8760 8.6 -M * 13.5 -M * Middle Powder 7760 9.1 12.4 73 8.3 13.0 64 Owl Creek 8975 2.3 3.5 66 6.6 7.0 94 Powder River Pass 9480 7.7 10.2 75 9.9 13.9 71 Shell Creek 9580 12.7 15.6 81 11.2 15.0 75 Timber Creek 7950 5.6 4.4 127 12.9 8.6 150 ----- ----- Basin Index (%) 85 83 SHOSHONE RIVER Blackwater 9780 23.3 24.0 97 26.1 22.0 119 Evening Star 9200 24.7 24.6 100 29.8 29.0 103 Marquette 8760 8.6 -M * 13.5 -M * Sylvan Road 7120 .0 9.2 0 15.9 17.8 89 Younts Peak 8350 7.6 15.2 50 14.0 16.8 83 ----- ----- Basin Index (%) 76 100 POWDER RIVER Bear Trap Meadow 8200 3.4 2.7 126 7.4 9.6 77 Cloud Peak Reservoir 9860 11.0 16.0 69 14.7 15.2 97 Grave Springs 8550 6.5 9.4 69 6.8 11.8 58 Hansen Sawmill 8360 4.9 4.5 109 9.3 9.8 95 Middle Powder 7760 9.1 12.4 73 8.3 13.0 64 Powder River Pass 9480 7.7 10.2 75 9.9 13.9 71 Soldier Park 8720 .8 -M * 9.1 -M * ----- ----- Basin Index (%) 77 77 TONGUE RIVER Big Goose 7990 8.7 9.2 95 11.2 12.9 87 Bone Springs Div 9350 13.6 16.2 84 12.9 17.0 76 Burgess Junction 7880 10.7 12.7 84 11.8 13.6 87 Dome Lake 8880 9.1 11.8 77 12.3 15.1 81 Little Goose 8870 9.7 -M * 13.2 -M * Sucker Creek 8880 10.2 12.7 80 13.3 16.0 83 Tie Creek 6870 1.1 4.1 27 10.9 13.1 83 ----- ----- Basin Index (%) 80 83 BELLE FOURCHE Cole Canyon 5910 .2 1.6 12 10.2 10.6 96 ----- ----- Basin Index (%) 12 96 CHEYENNE RIVER BASIN Blind Park 6890 .2 3.9 5 11.2 13.3 84 North Rapid Creek 6130 .0 3.9 0 9.0 11.3 80 ----- ----- Basin Index (%) 3 82 UPPER N. PLATTE Arapaho Ridge 10960 25.1 21.4 117 26.6 24.6 108 Blackhall Mtn 9820 33.2 -M * 32.5 -M * Columbine 9160 21.2 20.6 103 27.5 27.2 101 Divide Peak 8880 18.8 18.4 102 26.3 23.0 114 Joe Wright 10120 -M 22.5 * -M 28.2 * Laprele Creek 8375 7.7 7.7 100 12.4 13.9 89 Med Bow 10500 34.9 -M * 33.5 -M * North French Creek 10130 27.9 32.1 87 28.2 28.9 98 Never Summer 10280 22.0 20.8 106 19.3 -M * Old Battle 10000 32.9 33.2 99 31.4 37.4 84 Rawah 9020 12.5 8.2 152 20.7 15.7 132 Sage Creek Basin 7850 11.3 4.9 231 13.8 15.3 90 Sand Lake 10050 30.3 30.6 99 29.3 27.2 108 South Brush Creek 8440 8.7 9.7 90 15.8 16.7 95 Tower 10500 41.1 48.5 85 40.3 42.5 95 Webber Springs 9250 22.3 21.8 102 28.2 28.6 99 Willow Creek Pass 9540 17.4 13.4 130 17.6 14.6 121 Zirkel 9340 25.4 22.6 112 32.2 29.9 108 ----- ----- Basin Index (%) 103 101 SWEETWATER Deer Park 9700 16.8 16.3 103 19.6 21.8 90 Larsen Creek 9000 7.1 10.1 70 14.8 -M * South Pass 9040 14.0 15.4 91 14.4 18.8 77 ----- ----- Basin Index (%) 91 84 LOWER N. PLATTE Casper Mtn. 7900 17.3 14.3 121 16.8 16.8 100 Laprele Creek 8375 7.7 7.7 100 12.4 13.9 89 Reno Hill 8400 16.2 14.0 116 20.4 17.4 117 Windy Peak 7900 8.0 6.4 125 12.1 11.8 103 ----- ----- Basin Index (%) 116 103 LARAMIE RIVER Brooklyn Lake 10240 23.9 22.4 107 25.1 23.1 109 Cinnabar Park 9574 19.7 19.9 99 24.4 25.7 95 Crow Creek 8330 6.6 .4 1650* 16.6 12.1 137 Deadman Hill 10220 22.1 17.4 127 22.2 19.2 116 Rawah 9020 12.5 8.2 152 20.7 15.7 132 Roach 9700 19.9 16.6 120 23.7 20.9 113 ----- ----- Basin Index (%) 123 114 S. PLATTE Black Mountain 8920 14.3 -M * 19.7 -M * Crow Creek 8330 6.6 .4 1650* 16.6 12.1 137 Deadman Hill 10220 22.1 17.4 127 22.2 19.2 116 ----- ----- Basin Index (%) 161* 124 LITTLE SNAKE RIVER Battle Mountain 7440 5.3 3.5 151 17.2 16.2 106 Divide Peak 8880 18.8 18.4 102 26.3 23.0 114 Elk River 8700 12.9 15.0 86 19.9 21.5 93 Little Snake River 8915 22.7 23.8 95 34.2 31.2 110 Old Battle 10000 32.9 33.2 99 31.4 37.4 84 Sage Creek Basin 7850 11.3 4.9 231 13.8 15.3 90 Sandstone RS 8150 6.7 9.8 68 13.5 19.7 69 Whiskey Park 8950 26.7 25.7 104 30.2 29.9 101 ----- ----- Basin Index (%) 102 96 UPPER GREEN RIVER Big Sandy Opening 9080 11.3 12.4 91 13.2 14.2 93 Blind Bull Sum 8650 25.1 24.2 104 17.3 20.4 85 East Rim Divide 7930 1.5 9.4 16 11.6 12.3 94 Elkhart Park G.S. 9400 8.8 11.9 74 12.2 14.2 86 Gros Ventre Summit 8750 10.9 13.0 84 11.7 13.8 85 Gunsight Pass 9820 13.6 13.7 99 15.7 15.0 105 Kendall R.S. 7740 -M 7.7 * 12.2 14.8 82 Loomis Park 8240 9.5 12.5 76 17.3 18.1 96 New Fork Lake 8340 4.0 8.3 48 11.7 11.4 103 Pocket Creek 9360 8.1 -M * 10.7 -M * Snider Basin 8060 7.5 10.5 71 14.6 14.9 98 Spring Creek Divide 9000 25.8 23.6 109 24.5 25.0 98 Triple Peak 8500 19.8 19.2 103 28.1 26.6 106 ----- ----- Basin Index (%) 87 95 LOWER GREEN RIVER Blacks Fork Jct 8870 -M -M * -M -M * Buck Pasture 9700 10.7 -M * 18.2 -M * EF Blacks Fork GS 9360 7.8 -M * 12.5 -M * Hams Fork 7840 5.5 6.0 92 11.6 12.2 95 Hewinta 9519 8.2 7.6 108 15.4 15.2 101 Hickerson Park 9145 10.0 5.2 192 14.0 11.2 125 Hole-in-Rock 9150 5.9 5.6 105 13.9 10.7 130 Indian Creek 9425 20.6 23.5 88 19.5 23.8 82 Kelley R.S. 8180 10.4 12.2 85 16.3 19.1 85 Spirit Lk 10235 16.6 -M * 19.7 -M * Steel Creek Park 10200 18.4 16.3 113 20.8 18.0 116 ----- ----- Basin Index (%) 103 101 UPPER BEAR RIVER Bear River RS 8777 .1 -M * 12.6 -M * Bug Lake 7950 14.5 16.6 87 20.4 20.6 99 Burts Miller Ranch 8000 .1 -M * 6.5 -M * Chalk Creek #1 8993 17.1 24.5 70 23.4 27.1 86 Hayden Fork 9212 6.3 11.2 56 20.1 22.6 89 Kelley R.S. 8180 10.4 12.2 85 16.3 19.1 85 Lily Lake 9156 9.7 10.2 95 14.3 18.5 77 Monte Cristo 8960 24.1 27.3 88 29.4 27.7 106 Salt River Summit 7760 7.8 9.2 85 16.3 17.5 93 ----- ----- Basin Index (%) 81 92 ----------------------------------------------------------------------------- -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.