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 THURSDAY: APRIL 28 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 7.1 10.2 70 21.2 22.4 95 Black Bear 8170 30.1 37.1 81 36.8 41.2 89 Blind Bull Sum 8650 25.6 23.9 107 17.5 21.0 83 Cottonwood Creek 7670 17.7 16.4 108 28.9 26.9 107 East Rim Divide 7930 .0 8.6 0 12.0 12.6 95 Grand Targhee 9260 41.7 43.8 95 34.2 33.9 101 Granite Creek 6770 5.8 8.8 66 18.8 20.9 90 Grassy Lake 7265 21.2 29.9 71 36.6 38.7 95 Gros Ventre Summit 8750 9.9 12.0 82 12.0 14.3 84 Gunsight Pass 9820 14.0 13.2 106 16.1 15.8 102 Lewis Lake Divide 7850 21.4 30.5 70 33.1 38.0 87 Phillips Bench 8200 19.2 25.6 75 27.6 30.2 91 Salt River Summit 7760 7.0 8.2 85 17.2 18.1 95 Snake River Station 6920 5.2 8.9 58 23.3 24.3 96 Spring Creek Divide 9000 25.4 24.1 105 25.2 25.8 98 Thumb Divide 7980 4.9 13.7 36 15.9 20.6 77 Togwotee Pass 9580 22.0 24.7 89 26.7 26.8 100 Two Ocean Plateau 9240 26.1 29.4 89 26.1 29.6 88 Willow Creek 8380 22.7 24.5 93 36.2 36.9 98 Younts Peak 8350 5.5 15.2 36 14.4 17.3 83 ----- ----- Basin Index (%) 81 93 MADISON-GALLATIN Black Bear 8170 30.1 37.1 81 36.8 41.2 89 Canyon 7870 6.3 11.3 56 14.1 17.7 80 Madison Plateau 7750 17.7 22.1 80 24.2 28.4 85 West Yellowstone 6700 .0 3.7 0 14.5 15.6 93 Whiskey Creek 6800 9.1 15.2 60 17.8 22.0 81 ----- ----- Basin Index (%) 71 86 YELLOWSTONE Beartooth Lake 9360 18.6 23.2 80 19.3 21.6 89 Burnt Mtn 5880 .0 .0 * 13.4 15.2 88 Canyon 7870 6.3 11.3 56 14.1 17.7 80 Cole Creek 7850 11.5 16.3 71 14.8 15.8 94 Evening Star 9200 24.8 24.8 100 30.5 29.9 102 Fisher Creek 9100 27.6 33.1 83 27.2 34.6 79 Northeast Entrance 7350 .0 4.4 0 12.2 13.5 90 Parker Peak 9400 20.0 21.7 92 22.7 19.6 116 Sylvan Lake 8420 13.4 20.3 66 25.2 24.6 102 Thumb Divide 7980 4.9 13.7 36 15.9 20.6 77 Two Ocean Plateau 9240 26.1 29.4 89 26.1 29.6 88 White Mill 8700 20.9 23.8 88 22.6 25.8 88 Wolverine 7650 .0 4.2 0 13.1 13.5 97 ----- ----- Basin Index (%) 77 91 WIND RIVER Burroughs Creek 8750 6.4 -M * 14.3 -M * Castle Creek 8400 .3 -M * 8.6 -M * Cold Springs 9630 6.8 2.0 340 12.1 12.0 101 Deer Park 9700 18.6 16.3 114 21.9 23.0 95 Hobbs Park 10100 19.7 15.8 125 20.5 16.3 126 Kirwin 9550 12.6 10.3 122 15.8 13.4 118 Little Warm 9370 7.7 9.1 85 12.4 14.8 84 Owl Creek 8975 2.5 1.7 147 8.2 7.6 108 South Pass 9040 15.9 15.1 105 16.5 20.0 82 St. Lawrence Alt 8620 4.9 3.8 129 12.7 11.2 113 Togwotee Pass 9580 22.0 24.7 89 26.7 26.8 100 Townsend Creek 8700 11.8 8.2 144 17.1 14.6 117 ----- ----- Basin Index (%) 114 103 BIGHORN BASIN Bald Mtn. 9380 16.9 20.5 82 14.5 19.2 76 Bear Trap Meadow 8200 3.6 1.5 240 9.4 10.2 92 Bone Springs Div 9350 14.5 16.5 88 13.8 17.8 78 Grave Springs 8550 9.0 9.2 98 9.8 12.4 79 Kirwin 9550 12.6 10.3 122 15.8 13.4 118 Marquette 8760 8.2 -M * 13.9 -M * Middle Powder 7760 13.1 12.1 108 11.8 13.8 86 Owl Creek 8975 2.5 1.7 147 8.2 7.6 108 Powder River Pass 9480 8.1 9.8 83 11.2 14.6 77 Shell Creek 9580 14.1 16.0 88 12.7 15.8 80 Timber Creek 7950 5.5 3.5 157 13.7 9.5 144 ----- ----- Basin Index (%) 99 90 SHOSHONE RIVER Blackwater 9780 24.0 24.9 96 26.8 23.0 117 Evening Star 9200 24.8 24.8 100 30.5 29.9 102 Marquette 8760 8.2 -M * 13.9 -M * Sylvan Road 7120 .1 7.1 1 16.3 18.2 90 Younts Peak 8350 5.5 15.2 36 14.4 17.3 83 ----- ----- Basin Index (%) 76 100 POWDER RIVER Bear Trap Meadow 8200 3.6 1.5 240 9.4 10.2 92 Cloud Peak Reservoir 9860 13.9 16.5 84 17.2 16.1 107 Grave Springs 8550 9.0 9.2 98 9.8 12.4 79 Hansen Sawmill 8360 4.4 3.6 122 10.5 10.5 100 Middle Powder 7760 13.1 12.1 108 11.8 13.8 86 Powder River Pass 9480 8.1 9.8 83 11.2 14.6 77 Soldier Park 8720 1.5 -M * 10.6 -M * ----- ----- Basin Index (%) 99 90 TONGUE RIVER Big Goose 7990 10.1 9.1 111 13.4 13.6 99 Bone Springs Div 9350 14.5 16.5 88 13.8 17.8 78 Burgess Junction 7880 11.4 12.2 93 13.1 14.4 91 Dome Lake 8880 10.9 11.7 93 14.5 16.0 91 Little Goose 8870 11.8 -M * 16.1 -M * Sucker Creek 8880 11.4 12.5 91 15.2 16.9 90 Tie Creek 6870 .3 2.8 11 12.1 13.8 88 ----- ----- Basin Index (%) 90 89 BELLE FOURCHE Cole Canyon 5910 .8 .3 267* 11.1 11.4 97 ----- ----- Basin Index (%) 267* 97 CHEYENNE RIVER BASIN Blind Park 6890 .4 2.3 17 11.8 13.9 85 North Rapid Creek 6130 .0 2.3 0 9.4 11.9 79 ----- ----- Basin Index (%) 9 82 UPPER N. PLATTE Arapaho Ridge 10960 26.5 22.3 119 28.2 25.8 109 Blackhall Mtn 9820 35.0 -M * 35.0 -M * Columbine 9160 20.3 19.5 104 28.8 28.1 102 Divide Peak 8880 20.4 18.0 113 29.8 23.9 125 Joe Wright 10120 -M 23.5 * -M 29.3 * Laprele Creek 8375 8.3 6.9 120 14.4 14.7 98 Med Bow 10500 38.0 -M * 37.1 -M * North French Creek 10130 32.0 33.0 97 32.4 30.2 107 Never Summer 10280 22.6 21.5 105 20.0 -M * Old Battle 10000 36.8 34.6 106 34.7 38.6 90 Rawah 9020 12.2 7.4 165 21.8 17.0 128 Sage Creek Basin 7850 11.5 1.4 821 16.0 15.9 101 Sand Lake 10050 33.1 31.2 106 32.1 28.5 113 South Brush Creek 8440 9.1 9.9 92 18.4 17.5 105 Tower 10500 44.8 49.8 90 42.8 44.1 97 Webber Springs 9250 23.0 22.0 105 30.3 29.5 103 Willow Creek Pass 9540 17.6 13.8 128 18.3 15.4 119 Zirkel 9340 25.2 21.6 117 34.3 30.5 112 ----- ----- Basin Index (%) 110 106 SWEETWATER Deer Park 9700 18.6 16.3 114 21.9 23.0 95 Larsen Creek 9000 6.4 9.5 67 15.9 -M * South Pass 9040 15.9 15.1 105 16.5 20.0 82 ----- ----- Basin Index (%) 100 89 LOWER N. PLATTE Casper Mtn. 7900 19.8 14.1 140 19.6 17.6 111 Laprele Creek 8375 8.3 6.9 120 14.4 14.7 98 Reno Hill 8400 18.1 13.4 135 23.0 18.4 125 Windy Peak 7900 8.4 5.1 165 14.0 12.6 111 ----- ----- Basin Index (%) 138 112 LARAMIE RIVER Brooklyn Lake 10240 25.4 23.1 110 27.5 24.2 114 Cinnabar Park 9574 21.8 20.0 109 27.2 26.6 102 Crow Creek 8330 7.3 .0 * 19.0 13.1 145 Deadman Hill 10220 23.2 18.6 125 23.5 20.2 116 Rawah 9020 12.2 7.4 165 21.8 17.0 128 Roach 9700 21.6 17.1 126 26.1 21.9 119 ----- ----- Basin Index (%) 129 118 S. PLATTE Black Mountain 8920 14.0 -M * 20.8 -M * Crow Creek 8330 7.3 .0 * 19.0 13.1 145 Deadman Hill 10220 23.2 18.6 125 23.5 20.2 116 ----- ----- Basin Index (%) 164* 128 LITTLE SNAKE RIVER Battle Mountain 7440 5.0 .6 833* 19.1 16.9 113 Divide Peak 8880 20.4 18.0 113 29.8 23.9 125 Elk River 8700 12.6 14.1 89 21.4 22.3 96 Little Snake River 8915 24.7 22.9 108 37.5 32.2 116 Old Battle 10000 36.8 34.6 106 34.7 38.6 90 Sage Creek Basin 7850 11.5 1.4 821 16.0 15.9 101 Sandstone RS 8150 7.4 7.2 103 15.5 20.4 76 Whiskey Park 8950 28.9 25.9 112 33.5 31.0 108 ----- ----- Basin Index (%) 118 103 UPPER GREEN RIVER Big Sandy Opening 9080 11.5 11.6 99 14.3 14.9 96 Blind Bull Sum 8650 25.6 23.9 107 17.5 21.0 83 East Rim Divide 7930 .0 8.6 0 12.0 12.6 95 Elkhart Park G.S. 9400 9.0 11.7 77 13.3 14.7 90 Gros Ventre Summit 8750 9.9 12.0 82 12.0 14.3 84 Gunsight Pass 9820 14.0 13.2 106 16.1 15.8 102 Kendall R.S. 7740 -M 5.6 * 12.7 15.2 84 Loomis Park 8240 8.1 11.4 71 17.6 18.6 95 New Fork Lake 8340 2.7 6.9 39 11.9 11.8 101 Pocket Creek 9360 9.1 -M * 11.6 -M * Snider Basin 8060 6.3 9.9 64 15.0 15.3 98 Spring Creek Divide 9000 25.4 24.1 105 25.2 25.8 98 Triple Peak 8500 19.3 18.5 104 28.7 27.4 105 ----- ----- Basin Index (%) 87 95 LOWER GREEN RIVER Blacks Fork Jct 8870 8.8 -M * 14.7 -M * Buck Pasture 9700 12.0 -M * 20.0 -M * EF Blacks Fork GS 9360 8.0 -M * 14.0 -M * Hams Fork 7840 3.8 4.1 93 11.9 12.8 93 Hewinta 9519 8.7 5.7 153 16.6 15.8 105 Hickerson Park 9145 9.6 4.9 196 15.3 11.8 130 Hole-in-Rock 9150 4.7 3.8 124 15.0 11.2 134 Indian Creek 9425 20.6 23.7 87 20.1 24.6 82 Kelley R.S. 8180 9.9 11.8 84 16.9 19.8 85 Spirit Lk 10235 18.5 -M * 21.9 -M * Steel Creek Park 10200 19.9 16.8 118 22.5 18.7 120 ----- ----- Basin Index (%) 109 103 UPPER BEAR RIVER Bear River RS 8777 1.2 -M * 14.2 -M * Bug Lake 7950 12.9 15.9 81 20.9 21.2 99 Burts Miller Ranch 8000 .0 -M * 7.1 -M * Chalk Creek #1 8993 17.5 24.6 71 24.8 27.9 89 Hayden Fork 9212 7.3 9.9 74 22.4 23.3 96 Kelley R.S. 8180 9.9 11.8 84 16.9 19.8 85 Lily Lake 9156 10.3 9.8 105 16.5 19.2 86 Monte Cristo 8960 24.5 27.2 90 30.7 28.7 107 Salt River Summit 7760 7.0 8.2 85 17.2 18.1 95 ----- ----- Basin Index (%) 83 94 ----------------------------------------------------------------------------- -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.