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: MARCH 18 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 14.7 14.6 101 17.9 18.8 95 Black Bear 8170 29.2 32.2 91 31.0 34.2 91 Blind Bull Sum 8650 23.0 20.3 113 14.7 17.5 84 Cottonwood Creek 7670 -M 19.5 * -M 21.7 * East Rim Divide 7930 10.3 9.5 108 10.1 10.5 96 Grand Targhee 9260 34.7 32.8 106 26.5 26.8 99 Granite Creek 6770 13.7 15.0 91 16.1 18.0 89 Grassy Lake 7265 27.4 29.1 94 31.7 32.3 98 Gros Ventre Summit 8750 9.8 11.4 86 9.1 11.3 81 Gunsight Pass 9820 12.2 11.9 103 12.7 12.0 106 Lewis Lake Divide 7850 27.1 27.5 99 29.4 31.8 92 Phillips Bench 8200 20.3 22.2 91 23.5 25.1 94 Salt River Summit 7760 11.8 11.9 99 13.5 14.8 91 Snake River Station 6920 15.8 15.2 104 20.9 20.2 103 Spring Creek Divide 9000 23.0 20.7 111 21.2 21.2 100 Thumb Divide 7980 12.3 13.9 88 13.4 16.3 82 Togwotee Pass 9580 18.9 20.4 93 21.7 21.5 101 Two Ocean Plateau 9240 23.1 23.8 97 21.8 24.1 90 Willow Creek 8380 25.2 25.3 100 28.8 29.6 97 Younts Peak 8350 12.2 13.2 92 11.2 14.0 80 ----- ----- Basin Index (%) 98 94 MADISON-GALLATIN Black Bear 8170 29.2 32.2 91 31.0 34.2 91 Canyon 7870 9.9 11.7 85 12.2 14.4 85 Madison Plateau 7750 19.6 20.0 98 20.5 23.4 88 West Yellowstone 6700 9.7 9.9 98 12.3 12.6 98 Whiskey Creek 6800 12.1 13.9 87 14.6 18.0 81 ----- ----- Basin Index (%) 92 88 YELLOWSTONE Beartooth Lake 9360 15.3 19.0 81 15.7 17.5 90 Burnt Mtn 5880 .3 4.5 7 7.5 10.6 71 Canyon 7870 9.9 11.7 85 12.2 14.4 85 Cole Creek 7850 5.2 11.8 44 7.0 10.5 67 Evening Star 9200 22.6 21.9 103 25.1 24.2 104 Fisher Creek 9100 26.1 28.1 93 23.3 28.2 83 Northeast Entrance 7350 7.4 8.9 83 10.6 10.9 97 Parker Peak 9400 17.4 17.5 99 18.3 15.5 118 Sylvan Lake 8420 15.6 17.9 87 20.3 19.7 103 Thumb Divide 7980 12.3 13.9 88 13.4 16.3 82 Two Ocean Plateau 9240 23.1 23.8 97 21.8 24.1 90 White Mill 8700 20.6 19.7 105 19.5 21.0 93 Wolverine 7650 9.8 8.8 111 10.9 10.8 101 ----- ----- Basin Index (%) 89 92 WIND RIVER Burroughs Creek 8750 9.6 -M * 11.4 -M * Castle Creek 8400 3.9 -M * 5.3 -M * Cold Springs 9630 6.3 6.2 102 6.5 8.4 77 Deer Park 9700 10.9 12.8 85 11.3 16.9 67 Hobbs Park 10100 9.6 11.5 83 8.8 10.9 81 Kirwin 9550 7.8 8.3 94 9.4 9.8 96 Little Warm 9370 7.7 9.1 85 9.4 11.0 85 Owl Creek 8975 3.4 4.6 74 3.5 4.9 71 South Pass 9040 9.3 13.4 69 7.4 15.1 49 St. Lawrence Alt 8620 3.1 6.0 52 5.2 7.4 70 Togwotee Pass 9580 18.9 20.4 93 21.7 21.5 101 Townsend Creek 8700 5.7 8.0 71 6.6 9.9 67 ----- ----- Basin Index (%) 82 78 BIGHORN BASIN Bald Mtn. 9380 11.5 16.4 70 9.4 14.6 64 Bear Trap Meadow 8200 5.1 4.9 104 4.7 6.9 68 Bone Springs Div 9350 10.1 13.9 73 8.2 13.2 62 Grave Springs 8550 4.6 8.0 58 -M 8.8 * Kirwin 9550 7.8 8.3 94 9.4 9.8 96 Marquette 8760 3.2 -M * 7.1 -M * Middle Powder 7760 6.4 9.5 67 -M 9.8 * Owl Creek 8975 3.4 4.6 74 3.5 4.9 71 Powder River Pass 9480 6.8 9.0 76 6.4 10.6 60 Shell Creek 9580 9.0 12.7 71 8.0 11.7 68 Timber Creek 7950 2.9 4.2 69 7.3 6.0 122 ----- ----- Basin Index (%) 74 73 SHOSHONE RIVER Blackwater 9780 18.1 20.5 88 20.4 17.9 114 Evening Star 9200 22.6 21.9 103 25.1 24.2 104 Marquette 8760 3.2 -M * 7.1 -M * Sylvan Road 7120 7.8 10.3 76 13.8 15.0 92 Younts Peak 8350 12.2 13.2 92 11.2 14.0 80 ----- ----- Basin Index (%) 92 99 POWDER RIVER Bear Trap Meadow 8200 5.1 4.9 104 4.7 6.9 68 Cloud Peak Reservoir 9860 7.4 12.6 59 7.7 11.0 70 Grave Springs 8550 4.6 8.0 58 -M 8.8 * Hansen Sawmill 8360 3.7 5.5 67 4.5 7.0 64 Middle Powder 7760 6.4 9.5 67 -M 9.8 * Powder River Pass 9480 6.8 9.0 76 6.4 10.6 60 Soldier Park 8720 1.7 -M * 4.3 -M * ----- ----- Basin Index (%) 69 66 TONGUE RIVER Big Goose 7990 3.8 7.6 50 4.3 8.9 48 Bone Springs Div 9350 10.1 13.9 73 8.2 13.2 62 Burgess Junction 7880 5.5 9.4 59 6.0 10.2 59 Dome Lake 8880 5.6 10.0 56 5.7 11.2 51 Little Goose 8870 4.5 -M * 5.9 -M * Sucker Creek 8880 6.1 10.7 57 6.3 12.0 52 Tie Creek 6870 .2 4.9 4 4.8 9.6 50 ----- ----- Basin Index (%) 55 54 BELLE FOURCHE Cole Canyon 5910 2.0 5.5 36 6.9 7.8 88 ----- ----- Basin Index (%) 36 88 CHEYENNE RIVER BASIN Blind Park 6890 3.6 7.2 50 8.3 10.4 80 North Rapid Creek 6130 4.4 6.4 69 6.6 8.5 78 ----- ----- Basin Index (%) 59 79 UPPER N. PLATTE Arapaho Ridge 10960 20.7 18.0 115 20.6 19.4 106 Blackhall Mtn 9820 26.4 -M * 25.8 -M * Columbine 9160 22.8 21.8 105 23.0 22.6 102 Divide Peak 8880 16.8 17.4 97 19.4 18.8 103 Joe Wright 10120 14.1 18.9 75 21.7 22.5 96 Laprele Creek 8375 7.5 9.0 83 8.4 10.6 79 Med Bow 10500 30.0 -M * 26.4 -M * North French Creek 10130 22.5 24.6 91 21.5 23.4 92 Never Summer 10280 16.5 17.6 94 14.2 -M * Old Battle 10000 25.4 26.2 97 23.9 31.0 77 Rawah 9020 11.5 9.2 125 14.7 11.8 125 Sage Creek Basin 7850 13.2 11.6 114 10.8 12.9 84 Sand Lake 10050 22.1 24.2 91 20.9 21.3 98 South Brush Creek 8440 11.0 11.1 99 10.8 13.1 82 Tower 10500 33.9 39.5 86 32.6 35.3 92 Webber Springs 9250 19.5 20.9 93 21.7 23.5 92 Willow Creek Pass 9540 13.1 10.8 121 13.5 11.6 116 Zirkel 9340 26.1 25.8 101 27.6 25.1 110 ----- ----- Basin Index (%) 97 96 SWEETWATER Deer Park 9700 10.9 12.8 85 11.3 16.9 67 Larsen Creek 9000 7.1 11.0 65 10.0 -M * South Pass 9040 9.3 13.4 69 7.4 15.1 49 ----- ----- Basin Index (%) 73 58 LOWER N. PLATTE Casper Mtn. 7900 8.7 12.0 72 10.1 12.5 81 Laprele Creek 8375 7.5 9.0 83 8.4 10.6 79 Reno Hill 8400 10.8 11.8 92 13.0 12.7 102 Windy Peak 7900 6.5 6.9 94 8.2 8.9 92 ----- ----- Basin Index (%) 84 89 LARAMIE RIVER Brooklyn Lake 10240 20.8 17.5 119 19.8 18.1 109 Cinnabar Park 9574 18.0 17.8 101 19.8 21.1 94 Crow Creek 8330 7.4 7.0 106 11.4 8.7 131 Deadman Hill 10220 16.3 13.7 119 15.4 14.7 105 Rawah 9020 11.5 9.2 125 14.7 11.8 125 Roach 9700 14.6 13.8 106 16.4 16.6 99 ----- ----- Basin Index (%) 112 107 S. PLATTE Black Mountain 8920 10.6 -M * 13.4 -M * Crow Creek 8330 7.4 7.0 106 11.4 8.7 131 Deadman Hill 10220 16.3 13.7 119 15.4 14.7 105 ----- ----- Basin Index (%) 114 115 LITTLE SNAKE RIVER Battle Mountain 7440 12.2 11.2 109 13.4 13.4 100 Divide Peak 8880 16.8 17.4 97 19.4 18.8 103 Elk River 8700 16.4 17.3 95 16.8 17.7 95 Little Snake River 8915 21.0 20.8 101 27.2 26.2 104 Old Battle 10000 25.4 26.2 97 23.9 31.0 77 Sage Creek Basin 7850 13.2 11.6 114 10.8 12.9 84 Sandstone RS 8150 10.5 11.8 89 10.2 16.5 62 Whiskey Park 8950 24.2 24.1 100 24.3 24.7 98 ----- ----- Basin Index (%) 100 91 UPPER GREEN RIVER Big Sandy Opening 9080 9.1 11.4 80 9.5 11.6 82 Blind Bull Sum 8650 23.0 20.3 113 14.7 17.5 84 East Rim Divide 7930 10.3 9.5 108 10.1 10.5 96 Elkhart Park G.S. 9400 7.9 10.5 75 9.9 11.7 85 Gros Ventre Summit 8750 9.8 11.4 86 9.1 11.3 81 Gunsight Pass 9820 12.2 11.9 103 12.7 12.0 106 Kendall R.S. 7740 9.4 11.1 85 10.8 12.8 84 Loomis Park 8240 13.3 13.2 101 15.2 15.4 99 New Fork Lake 8340 8.9 9.2 97 10.2 9.6 106 Pocket Creek 9360 6.5 -M * 7.9 -M * Snider Basin 8060 11.7 10.9 107 11.3 12.7 89 Spring Creek Divide 9000 23.0 20.7 111 21.2 21.2 100 Triple Peak 8500 23.0 19.2 120 24.0 22.5 107 ----- ----- Basin Index (%) 101 94 LOWER GREEN RIVER Blacks Fork Jct 8870 10.1 -M * 10.2 -M * Buck Pasture 9700 11.5 -M * 14.3 -M * EF Blacks Fork GS 9360 8.1 -M * 8.2 -M * Hams Fork 7840 -M 10.2 * -M 10.0 * Hewinta 9519 9.6 9.6 100 11.3 12.2 93 Hickerson Park 9145 8.4 6.6 127 9.3 8.7 107 Hole-in-Rock 9150 8.3 6.5 128 9.6 8.2 117 Indian Creek 9425 19.4 21.0 92 15.0 19.8 76 Kelley R.S. 8180 12.1 13.2 92 13.4 16.0 84 Spirit Lk 10235 10.7 -M * 13.0 -M * Steel Creek Park 10200 13.5 13.3 102 15.6 14.1 111 ----- ----- Basin Index (%) 102 94 UPPER BEAR RIVER Bear River RS 8777 7.9 -M * 10.5 -M * Bug Lake 7950 16.8 16.5 102 16.8 17.2 98 Burts Miller Ranch 8000 4.8 -M * 5.1 -M * Chalk Creek #1 8993 17.4 20.8 84 19.2 21.9 88 Hayden Fork 9212 12.2 14.2 86 17.1 18.3 93 Kelley R.S. 8180 12.1 13.2 92 13.4 16.0 84 Lily Lake 9156 11.6 11.4 102 11.9 14.8 80 Monte Cristo 8960 24.7 24.1 102 23.4 22.8 103 Salt River Summit 7760 11.8 11.9 99 13.5 14.8 91 ----- ----- Basin Index (%) 95 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.