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 WEDNESDAY: APRIL 20 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 10.6 11.9 89 20.9 21.7 96 Black Bear 8170 31.1 36.9 84 35.8 39.8 90 Blind Bull Sum 8650 25.3 24.0 105 17.3 20.2 86 Cottonwood Creek 7670 18.6 18.6 100 27.5 25.8 107 East Rim Divide 7930 3.8 9.5 40 11.7 12.2 96 Grand Targhee 9260 43.0 42.0 102 33.3 32.6 102 Granite Creek 6770 9.5 10.8 88 18.4 20.3 91 Grassy Lake 7265 25.8 31.3 82 36.0 37.3 97 Gros Ventre Summit 8750 11.3 13.2 86 11.8 13.7 86 Gunsight Pass 9820 13.7 13.6 101 15.5 14.9 104 Lewis Lake Divide 7850 25.7 30.4 85 32.8 36.8 89 Phillips Bench 8200 21.4 25.6 84 27.2 29.2 93 Salt River Summit 7760 9.4 9.7 97 16.3 17.4 94 Snake River Station 6920 9.8 11.3 87 23.2 23.5 99 Spring Creek Divide 9000 26.0 23.5 111 24.5 24.7 99 Thumb Divide 7980 8.5 14.5 59 15.7 19.6 80 Togwotee Pass 9580 21.4 23.8 90 25.7 25.7 100 Two Ocean Plateau 9240 27.0 28.1 96 25.8 28.5 91 Willow Creek 8380 24.7 26.8 92 34.4 35.3 97 Younts Peak 8350 10.1 15.1 67 14.0 16.6 84 ----- ----- Basin Index (%) 90 94 MADISON-GALLATIN Black Bear 8170 31.1 36.9 84 35.8 39.8 90 Canyon 7870 8.3 12.2 68 13.6 17.0 80 Madison Plateau 7750 20.4 22.9 89 23.7 27.5 86 West Yellowstone 6700 2.7 7.4 36 14.2 15.1 94 Whiskey Creek 6800 11.8 15.3 77 17.7 21.2 83 ----- ----- Basin Index (%) 78 87 YELLOWSTONE Beartooth Lake 9360 18.7 23.4 80 18.9 20.8 91 Burnt Mtn 5880 .0 .0 * 12.3 14.2 87 Canyon 7870 8.3 12.2 68 13.6 17.0 80 Cole Creek 7850 11.6 16.3 71 13.1 14.5 90 Evening Star 9200 25.6 24.8 103 29.5 28.7 103 Fisher Creek 9100 28.1 32.4 87 26.8 33.3 80 Northeast Entrance 7350 1.3 6.7 19 11.9 13.0 92 Parker Peak 9400 20.9 20.9 100 21.6 18.7 116 Sylvan Lake 8420 15.1 20.4 74 24.3 23.6 103 Thumb Divide 7980 8.5 14.5 59 15.7 19.6 80 Two Ocean Plateau 9240 27.0 28.1 96 25.8 28.5 91 White Mill 8700 22.3 23.7 94 22.5 24.9 90 Wolverine 7650 5.3 7.2 74 12.3 12.8 96 ----- ----- Basin Index (%) 84 92 WIND RIVER Burroughs Creek 8750 8.1 -M * 13.2 -M * Castle Creek 8400 .8 -M * 7.6 -M * Cold Springs 9630 7.4 4.6 161 10.5 10.9 96 Deer Park 9700 17.1 16.3 105 19.5 21.5 91 Hobbs Park 10100 17.1 14.8 116 17.6 14.8 119 Kirwin 9550 11.6 10.0 116 14.6 12.4 118 Little Warm 9370 8.7 10.1 86 12.1 13.9 87 Owl Creek 8975 3.2 4.0 80 6.6 6.9 96 South Pass 9040 14.3 15.5 92 14.3 18.6 77 St. Lawrence Alt 8620 5.6 5.3 106 10.9 9.9 110 Togwotee Pass 9580 21.4 23.8 90 25.7 25.7 100 Townsend Creek 8700 10.9 9.4 116 14.3 13.3 108 ----- ----- Basin Index (%) 103 99 BIGHORN BASIN Bald Mtn. 9380 16.6 19.8 84 14.0 18.2 77 Bear Trap Meadow 8200 4.2 3.2 131 7.4 9.4 79 Bone Springs Div 9350 14.4 16.1 89 12.9 16.7 77 Grave Springs 8550 6.7 9.6 70 6.8 11.7 58 Kirwin 9550 11.6 10.0 116 14.6 12.4 118 Marquette 8760 8.6 -M * 13.7 -M * Middle Powder 7760 9.4 12.5 75 8.2 12.8 64 Owl Creek 8975 3.2 4.0 80 6.6 6.9 96 Powder River Pass 9480 7.9 10.2 77 9.7 13.7 71 Shell Creek 9580 13.2 15.4 86 11.2 14.8 76 Timber Creek 7950 6.1 4.8 127 12.9 8.4 154 ----- ----- Basin Index (%) 88 83 SHOSHONE RIVER Blackwater 9780 23.5 23.8 99 26.2 21.8 120 Evening Star 9200 25.6 24.8 103 29.5 28.7 103 Marquette 8760 8.6 -M * 13.7 -M * Sylvan Road 7120 .0 9.8 0 16.0 17.6 91 Younts Peak 8350 10.1 15.1 67 14.0 16.6 84 ----- ----- Basin Index (%) 81 101 POWDER RIVER Bear Trap Meadow 8200 4.2 3.2 131 7.4 9.4 79 Cloud Peak Reservoir 9860 11.8 15.8 75 14.5 14.9 97 Grave Springs 8550 6.7 9.6 70 6.8 11.7 58 Hansen Sawmill 8360 5.5 4.8 115 9.1 9.6 95 Middle Powder 7760 9.4 12.5 75 8.2 12.8 64 Powder River Pass 9480 7.9 10.2 77 9.7 13.7 71 Soldier Park 8720 1.5 -M * 8.9 -M * ----- ----- Basin Index (%) 81 77 TONGUE RIVER Big Goose 7990 8.9 9.3 96 11.0 12.6 87 Bone Springs Div 9350 14.4 16.1 89 12.9 16.7 77 Burgess Junction 7880 10.7 12.5 86 11.7 13.4 87 Dome Lake 8880 10.0 11.8 85 12.2 14.9 82 Little Goose 8870 9.9 -M * 13.2 -M * Sucker Creek 8880 10.4 12.7 82 13.3 15.8 84 Tie Creek 6870 1.6 4.4 36 10.9 12.8 85 ----- ----- Basin Index (%) 84 84 BELLE FOURCHE Cole Canyon 5910 .7 2.0 35 10.1 10.4 97 ----- ----- Basin Index (%) 35 97 CHEYENNE RIVER BASIN Blind Park 6890 .0 4.1 0 11.2 13.1 85 North Rapid Creek 6130 .0 4.2 0 9.0 11.0 82 ----- ----- Basin Index (%) 0 84 UPPER N. PLATTE Arapaho Ridge 10960 25.4 21.4 119 26.6 24.3 109 Blackhall Mtn 9820 33.3 -M * 32.6 -M * Columbine 9160 21.8 20.6 106 27.4 26.9 102 Divide Peak 8880 19.1 18.9 101 26.3 22.8 115 Joe Wright 10120 -M 22.2 * -M 27.8 * Laprele Creek 8375 8.2 8.0 102 12.3 13.7 90 Med Bow 10500 35.8 -M * 33.3 -M * North French Creek 10130 27.5 32.0 86 27.9 28.6 98 Never Summer 10280 21.9 20.7 106 19.2 -M * Old Battle 10000 32.7 32.7 100 30.9 37.0 84 Rawah 9020 13.0 8.4 155 20.7 15.5 134 Sage Creek Basin 7850 11.9 6.0 198 13.8 15.3 90 Sand Lake 10050 29.9 30.5 98 29.0 26.8 108 South Brush Creek 8440 9.2 9.8 94 15.7 16.5 95 Tower 10500 40.5 48.0 84 39.8 42.0 95 Webber Springs 9250 22.8 22.0 104 28.1 28.4 99 Willow Creek Pass 9540 17.4 13.1 133 17.6 14.4 122 Zirkel 9340 25.6 22.7 113 32.1 29.7 108 ----- ----- Basin Index (%) 104 102 SWEETWATER Deer Park 9700 17.1 16.3 105 19.5 21.5 91 Larsen Creek 9000 8.0 10.3 78 14.9 -M * South Pass 9040 14.3 15.5 92 14.3 18.6 77 ----- ----- Basin Index (%) 94 84 LOWER N. PLATTE Casper Mtn. 7900 17.6 14.4 122 16.6 16.6 100 Laprele Creek 8375 8.2 8.0 102 12.3 13.7 90 Reno Hill 8400 16.6 13.9 119 20.2 17.2 117 Windy Peak 7900 8.4 6.6 127 12.0 11.6 103 ----- ----- Basin Index (%) 118 103 LARAMIE RIVER Brooklyn Lake 10240 23.9 22.2 108 25.0 22.8 110 Cinnabar Park 9574 19.9 20.1 99 24.4 25.3 96 Crow Creek 8330 7.4 .7 1057* 16.6 12.0 138 Deadman Hill 10220 22.2 17.0 131 22.2 18.9 117 Rawah 9020 13.0 8.4 155 20.7 15.5 134 Roach 9700 20.2 16.6 122 23.7 20.6 115 ----- ----- Basin Index (%) 125 115 S. PLATTE Black Mountain 8920 14.7 -M * 19.7 -M * Crow Creek 8330 7.4 .7 1057* 16.6 12.0 138 Deadman Hill 10220 22.2 17.0 131 22.2 18.9 117 ----- ----- Basin Index (%) 167* 126 LITTLE SNAKE RIVER Battle Mountain 7440 6.5 4.3 151 17.2 16.1 107 Divide Peak 8880 19.1 18.9 101 26.3 22.8 115 Elk River 8700 13.3 15.5 86 19.9 21.2 94 Little Snake River 8915 22.8 24.3 94 34.0 31.2 109 Old Battle 10000 32.7 32.7 100 30.9 37.0 84 Sage Creek Basin 7850 11.9 6.0 198 13.8 15.3 90 Sandstone RS 8150 7.9 10.1 78 13.5 19.5 69 Whiskey Park 8950 26.6 25.9 103 29.9 29.6 101 ----- ----- Basin Index (%) 102 96 UPPER GREEN RIVER Big Sandy Opening 9080 11.4 12.7 90 13.4 14.1 95 Blind Bull Sum 8650 25.3 24.0 105 17.3 20.2 86 East Rim Divide 7930 3.8 9.5 40 11.7 12.2 96 Elkhart Park G.S. 9400 9.0 11.9 76 12.3 14.0 88 Gros Ventre Summit 8750 11.3 13.2 86 11.8 13.7 86 Gunsight Pass 9820 13.7 13.6 101 15.5 14.9 104 Kendall R.S. 7740 .8 8.4 10 12.3 14.8 83 Loomis Park 8240 10.7 13.0 82 17.3 18.0 96 New Fork Lake 8340 5.4 8.8 61 11.6 11.3 103 Pocket Creek 9360 8.5 -M * 10.7 -M * Snider Basin 8060 9.5 10.7 89 14.6 14.8 99 Spring Creek Divide 9000 26.0 23.5 111 24.5 24.7 99 Triple Peak 8500 21.8 19.3 113 28.1 26.3 107 ----- ----- Basin Index (%) 88 96 LOWER GREEN RIVER Blacks Fork Jct 8870 9.9 -M * 13.5 -M * Buck Pasture 9700 11.1 -M * 18.2 -M * EF Blacks Fork GS 9360 8.3 -M * 12.5 -M * Hams Fork 7840 7.3 6.7 109 11.7 12.0 98 Hewinta 9519 8.6 8.1 106 15.4 15.0 103 Hickerson Park 9145 10.7 5.4 198 13.9 11.0 126 Hole-in-Rock 9150 7.1 5.9 120 13.8 10.5 131 Indian Creek 9425 22.1 23.3 95 19.5 23.6 83 Kelley R.S. 8180 11.6 12.7 91 16.3 18.9 86 Spirit Lk 10235 16.7 -M * 19.4 -M * Steel Creek Park 10200 18.4 16.2 114 20.8 17.8 117 ----- ----- Basin Index (%) 110 102 UPPER BEAR RIVER Bear River RS 8777 .7 -M * 12.7 -M * Bug Lake 7950 15.9 17.2 92 20.3 20.4 100 Burts Miller Ranch 8000 .0 -M * 6.5 -M * Chalk Creek #1 8993 18.2 24.6 74 23.6 26.7 88 Hayden Fork 9212 8.0 11.8 68 20.2 22.4 90 Kelley R.S. 8180 11.6 12.7 91 16.3 18.9 86 Lily Lake 9156 10.3 10.6 97 14.8 18.3 81 Monte Cristo 8960 25.5 27.5 93 29.4 27.3 108 Salt River Summit 7760 9.4 9.7 97 16.3 17.4 94 ----- ----- Basin Index (%) 87 93 ----------------------------------------------------------------------------- -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.