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: DECEMBER 23 , 2015 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 7.2 6.2 116 10.5 8.9 118 Black Bear 8170 14.6 15.0 97 17.2 15.7 110 Blind Bull Sum 8650 9.0 8.0 112 6.6 8.2 80 Cottonwood Creek 7670 6.5 7.3 89 8.4 9.9 85 East Rim Divide 7930 3.6 3.7 97 5.0 4.8 104 Grand Targhee 9260 16.1 15.1 107 13.3 13.2 101 Granite Creek 6770 5.8 5.0 116 8.1 8.2 99 Grassy Lake 7265 12.1 10.6 114 16.5 14.8 111 Gros Ventre Summit 8750 5.2 5.1 102 5.3 5.4 98 Gunsight Pass 9820 5.6 4.7 119 6.9 5.6 123 Lewis Lake Divide 7850 13.6 10.9 125 16.4 14.7 112 Phillips Bench 8200 8.0 9.1 88 11.3 11.1 102 Salt River Summit 7760 -M 4.0 * -M 6.6 * Snake River Station 6920 7.1 5.4 131 11.9 9.7 123 Spring Creek Divide 9000 8.2 8.3 99 8.2 9.6 85 Thumb Divide 7980 6.2 5.3 117 8.2 7.7 106 Togwotee Pass 9580 8.8 9.8 90 11.1 10.2 109 Two Ocean Plateau 9240 12.4 11.0 113 12.1 11.3 107 Willow Creek 8380 8.0 9.4 85 11.3 13.8 82 Younts Peak 8350 5.3 6.0 88 5.8 6.8 85 ----- ----- Basin Index (%) 105 102 MADISON-GALLATIN Black Bear 8170 14.6 15.0 97 17.2 15.7 110 Canyon 7870 5.3 4.6 115 7.1 7.0 101 Madison Plateau 7750 9.9 9.1 109 11.3 10.7 106 West Yellowstone 6700 5.6 3.9 144 7.6 6.1 125 Whiskey Creek 6800 6.2 5.7 109 8.0 8.6 93 ----- ----- Basin Index (%) 109 106 YELLOWSTONE Beartooth Lake 9360 8.2 8.8 93 8.8 8.1 109 Burnt Mtn 5880 1.9 1.8 106 6.4 6.4 100 Canyon 7870 5.3 4.6 115 7.1 7.0 101 Cole Creek 7850 3.5 5.7 61 4.4 6.1 72 Evening Star 9200 11.7 9.8 119 13.7 11.7 117 Fisher Creek 9100 13.9 13.3 105 13.0 13.3 98 Northeast Entrance 7350 3.5 3.0 117 6.3 5.5 115 Parker Peak 9400 9.2 8.6 107 10.5 7.7 136 Sylvan Lake 8420 7.5 8.1 93 11.5 10.0 115 Thumb Divide 7980 6.2 5.3 117 8.2 7.7 106 Two Ocean Plateau 9240 12.4 11.0 113 12.1 11.3 107 White Mill 8700 11.0 8.8 125 11.2 10.1 111 Wolverine 7650 5.8 4.0 145 6.7 5.6 120 ----- ----- Basin Index (%) 108 109 WIND RIVER Burroughs Creek 8750 5.2 -M * 6.5 -M * Castle Creek 8400 2.3 -M * 3.5 -M * Cold Springs 9630 3.1 2.9 107 3.7 4.6 80 Deer Park 9700 5.0 5.4 93 4.8 7.7 62 Hobbs Park 10100 4.4 6.0 73 4.3 5.7 75 Kirwin 9550 4.2 4.1 102 5.3 5.1 104 Little Warm 9370 3.9 4.0 98 5.3 5.6 95 Owl Creek 8975 1.3 2.3 57 1.9 2.6 73 South Pass 9040 4.0 5.7 70 3.3 7.5 44 St. Lawrence Alt 8620 1.1 2.6 42 2.6 4.0 65 Togwotee Pass 9580 8.8 9.8 90 11.1 10.2 109 Townsend Creek 8700 2.4 3.5 69 3.0 5.4 56 ----- ----- Basin Index (%) 83 78 BIGHORN BASIN Bald Mtn. 9380 3.3 7.3 45 3.7 7.2 51 Bear Trap Meadow 8200 2.0 2.4 83 2.6 3.9 67 Bone Springs Div 9350 4.2 6.7 63 4.0 6.5 62 Grave Springs 8550 1.7 2.9 59 1.8 4.6 39 Kirwin 9550 4.2 4.1 102 5.3 5.1 104 Marquette 8760 2.1 -M * 5.3 -M * Middle Powder 7760 2.7 4.4 61 -M 5.7 * Owl Creek 8975 1.3 2.3 57 1.9 2.6 73 Powder River Pass 9480 2.2 4.1 54 2.2 5.4 41 Shell Creek 9580 3.3 6.6 50 3.2 6.0 53 Timber Creek 7950 1.7 1.9 89 5.3 3.8 139 ----- ----- Basin Index (%) 62 67 SHOSHONE RIVER Blackwater 9780 10.5 9.4 112 12.2 9.0 136 Evening Star 9200 11.7 9.8 119 13.7 11.7 117 Marquette 8760 2.1 -M * 5.3 -M * Sylvan Road 7120 4.4 4.6 96 8.3 8.2 101 Younts Peak 8350 5.3 6.0 88 5.8 6.8 85 ----- ----- Basin Index (%) 107 112 POWDER RIVER Bear Trap Meadow 8200 2.0 2.4 83 2.6 3.9 67 Cloud Peak Reservoir 9860 2.8 5.4 52 -M 5.8 * Grave Springs 8550 1.7 2.9 59 1.8 4.6 39 Hansen Sawmill 8360 2.0 2.6 77 2.4 3.8 63 Middle Powder 7760 2.7 4.4 61 -M 5.7 * Powder River Pass 9480 2.2 4.1 54 2.2 5.4 41 Soldier Park 8720 .8 -M * 2.4 -M * ----- ----- Basin Index (%) 61 51 TONGUE RIVER Big Goose 7990 1.7 3.3 52 2.2 5.0 44 Bone Springs Div 9350 4.2 6.7 63 4.0 6.5 62 Burgess Junction 7880 2.3 4.2 55 3.6 5.5 65 Dome Lake 8880 1.8 4.7 38 -M 6.2 * Little Goose 8870 2.1 -M * 3.0 -M * Sucker Creek 8880 2.5 4.5 56 3.0 6.2 48 Tie Creek 6870 .3 1.4 21 2.2 5.1 43 ----- ----- Basin Index (%) 52 53 BELLE FOURCHE Cole Canyon 5910 1.4 1.2 117 3.4 4.3 79 ----- ----- Basin Index (%) 117 79 CHEYENNE RIVER BASIN Blind Park 6890 1.5 2.5 60 3.0 5.4 56 North Rapid Creek 6130 2.5 2.6 96 2.7 4.6 59 ----- ----- Basin Index (%) 78 57 UPPER N. PLATTE Arapaho Ridge 10960 10.7 8.4 127 11.5 9.8 117 Blackhall Mtn 9820 11.8 -M * 12.6 -M * Columbine 9160 8.0 7.8 103 9.4 10.4 90 Divide Peak 8880 6.6 7.2 92 9.2 9.3 99 Joe Wright 10120 5.7 8.7 66 10.4 11.0 95 Laprele Creek 8375 2.5 3.4 74 3.6 5.4 67 Med Bow 10500 12.3 -M * 12.2 -M * North French Creek 10130 9.0 10.4 87 9.4 10.8 87 Never Summer 10280 8.1 7.7 105 8.1 -M * Old Battle 10000 11.0 11.4 96 10.4 14.7 71 Rawah 9020 5.6 3.8 147 8.6 6.7 128 Sage Creek Basin 7850 4.9 4.8 102 4.9 6.4 77 Sand Lake 10050 10.8 10.2 106 10.8 10.1 107 South Brush Creek 8440 3.4 4.2 81 4.8 6.5 74 Tower 10500 12.5 17.9 70 13.0 16.6 78 Webber Springs 9250 8.6 8.5 101 10.4 11.2 93 Willow Creek Pass 9540 7.1 5.0 142 7.4 5.9 125 Zirkel 9340 9.6 8.3 116 11.9 12.1 98 ----- ----- Basin Index (%) 97 92 SWEETWATER Deer Park 9700 5.0 5.4 93 4.8 7.7 62 Larsen Creek 9000 2.4 4.2 57 5.3 -M * South Pass 9040 4.0 5.7 70 3.3 7.5 44 ----- ----- Basin Index (%) 75 53 LOWER N. PLATTE Casper Mtn. 7900 3.6 5.2 69 4.6 6.8 68 Laprele Creek 8375 2.5 3.4 74 3.6 5.4 67 Reno Hill 8400 4.9 5.2 94 7.0 6.5 108 Windy Peak 7900 2.8 2.8 100 4.1 4.7 87 ----- ----- Basin Index (%) 83 82 LARAMIE RIVER Brooklyn Lake 10240 9.0 7.2 125 9.0 8.3 108 Cinnabar Park 9574 7.7 7.7 100 9.4 10.1 93 Crow Creek 8330 3.4 3.9 87 6.5 4.9 133 Deadman Hill 10220 8.5 6.5 131 8.8 7.1 124 Rawah 9020 5.6 3.8 147 8.6 6.7 128 Roach 9700 7.3 6.0 122 8.7 8.1 107 ----- ----- Basin Index (%) 118 113 S. PLATTE Black Mountain 8920 6.2 -M * 8.8 -M * Crow Creek 8330 3.4 3.9 87 6.5 4.9 133 Deadman Hill 10220 8.5 6.5 131 8.8 7.1 124 ----- ----- Basin Index (%) 114 128 LITTLE SNAKE RIVER Battle Mountain 7440 4.5 3.3 136 5.6 6.4 88 Divide Peak 8880 6.6 7.2 92 9.2 9.3 99 Elk River 8700 6.6 5.7 116 8.0 8.1 99 Little Snake River 8915 7.5 7.2 104 12.6 13.1 96 Old Battle 10000 11.0 11.4 96 10.4 14.7 71 Sage Creek Basin 7850 4.9 4.8 102 4.9 6.4 77 Sandstone RS 8150 4.4 4.0 110 4.1 7.8 53 Whiskey Park 8950 8.1 8.4 96 9.5 10.8 88 ----- ----- Basin Index (%) 103 84 UPPER GREEN RIVER Big Sandy Opening 9080 3.8 4.9 78 4.6 5.6 82 Blind Bull Sum 8650 9.0 8.0 112 6.6 8.2 80 East Rim Divide 7930 3.6 3.7 97 5.0 4.8 104 Elkhart Park G.S. 9400 3.9 4.7 83 6.3 5.7 111 Gros Ventre Summit 8750 5.2 5.1 102 5.3 5.4 98 Gunsight Pass 9820 5.6 4.7 119 6.9 5.6 123 Kendall R.S. 7740 4.9 4.1 120 6.6 5.7 116 Loomis Park 8240 5.1 5.4 94 7.1 7.0 101 New Fork Lake 8340 4.3 3.8 113 5.7 4.5 127 Pocket Creek 9360 4.1 -M * 4.5 -M * Snider Basin 8060 4.7 4.5 104 4.7 5.8 81 Spring Creek Divide 9000 8.2 8.3 99 8.2 9.6 85 Triple Peak 8500 8.0 7.4 108 9.8 9.7 101 ----- ----- Basin Index (%) 103 99 LOWER GREEN RIVER Blacks Fork Jct 8870 5.6 -M * 4.9 -M * Buck Pasture 9700 4.6 -M * 6.6 -M * EF Blacks Fork GS 9360 3.7 -M * 4.4 -M * Hams Fork 7840 4.0 3.8 105 3.4 4.6 74 Hewinta 9519 4.3 3.3 130 5.7 6.0 95 Hickerson Park 9145 4.4 2.3 191 4.9 4.6 107 Hole-in-Rock 9150 3.6 2.6 138 5.4 4.3 126 Indian Creek 9425 7.2 9.1 79 5.5 8.7 63 Kelley R.S. 8180 -M 5.3 * -M 7.4 * Spirit Lk 10235 5.0 -M * 7.4 -M * Steel Creek Park 10200 6.4 5.7 112 8.5 6.8 125 ----- ----- Basin Index (%) 112 95 UPPER BEAR RIVER Bear River RS 8777 4.0 -M * 4.2 -M * Bug Lake 7950 6.7 5.6 120 7.4 8.0 92 Burts Miller Ranch 8000 2.7 -M * 2.4 -M * Chalk Creek #1 8993 7.9 9.2 86 -M 10.5 * Hayden Fork 9212 5.5 4.6 120 7.5 8.6 87 Kelley R.S. 8180 -M 5.3 * -M 7.4 * Lily Lake 9156 4.5 4.6 98 4.9 7.4 66 Monte Cristo 8960 9.5 9.0 106 10.5 10.4 101 Salt River Summit 7760 -M 4.0 * -M 6.6 * ----- ----- Basin Index (%) 103 88* ----------------------------------------------------------------------------- -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.