Supercell over Laramie
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Wyoming Snow Precipitation Update


United States Natural Resources Water and Climate Center 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: DECEMBER 4 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 5.4 4.3 126 7.0 6.5 108 Blind Bull Sum 8650 4.9 5.6 88 4.4 6.2 71 Cottonwood Creek 7670 4.3 4.9 88 6.2 7.3 85 East Rim Divide 7930 1.9 2.1 90 3.0 3.6 83 Grand Targhee 9260 10.2 10.1 101 7.4 10.2 73 Granite Creek 6770 3.1 2.8 111 6.0 5.8 103 Grassy Lake 7265 6.2 6.8 91 9.0 10.6 85 Gros Ventre Summit 8750 -M 4.1 * -M 4.3 * Gunsight Pass 9820 3.4 3.4 100 3.6 4.3 84 Lewis Lake Divide 7850 6.8 7.9 86 9.4 10.8 87 Loomis Park 8240 2.8 3.4 82 4.4 5.2 85 Phillips Bench 8200 6.1 6.2 98 7.9 8.0 99 Salt River Summit 7640 2.0 2.2 91 3.6 4.7 77 Snake River Station 6920 3.7 3.4 109 6.8 7.1 96 Somsen Ranch 6800 2.4 2.3 104 3.7 5.2 71 Spring Creek Divide 9000 5.0 5.5 91 6.1 7.0 87 Thumb Divide 7980 4.0 3.4 118 5.3 5.8 91 Togwotee Pass 9580 7.4 7.7 96 8.8 7.7 114 Triple Peak 8500 5.7 5.2 110 6.6 7.3 90 Two Ocean Plateau 9240 8.7 9.0 97 5.3 8.7 61 Willow Creek 8080 4.3 6.2 69 6.3 10.3 61 Younts Peak 8350 4.8 4.5 107 7.3 5.4 135 ----- ----- Basin Index (%) 96 87 MADISON HEADWATERS IN WYOMING Black Bear 8170 7.4 9.5 78 8.7 11.5 76 Canyon 7870 2.6 3.1 84 3.9 5.2 75 Madison Plateau 7750 4.7 5.6 84 6.5 7.9 82 West Yellowstone 6700 2.4 2.2 109 4.6 4.6 100 Whiskey Creek 6800 2.7 3.6 75 5.1 6.5 78 ----- ----- Basin Index (%) 82 81 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 9.5 6.5 146 9.6 6.0 160 Canyon 7870 2.6 3.1 84 3.9 5.2 75 Evening Star 9200 10.5 7.6 138 12.2 9.0 136 Fisher Creek 9100 12.6 9.2 137 15.3 9.9 155 Monument Peak 8850 8.1 5.7 142 10.3 6.9 149 Northeast Entrance 7350 1.6 1.9 84 7.4 4.3 172 Parker Peak 9400 7.7 6.5 118 8.5 6.0 142 Sylvan Lake 8420 5.3 5.6 95 8.0 7.8 103 Thumb Divide 7980 4.0 3.4 118 5.3 5.8 91 Two Ocean Plateau 9240 8.7 9.0 97 5.3 8.7 61 White Mill 8700 11.1 6.5 171 11.6 7.6 153 Wolverine 7650 2.4 2.4 100 8.6 4.4 195 ----- ----- Basin Index (%) 125 130 WIND RIVER Burroughs Creek 8750 2.9 -M * 6.5 -M * Castle Creek 8400 2.2 -M * 3.6 -M * Cold Springs 9630 1.6 2.5 64 2.9 3.8 76 Deer Park 9700 3.8 4.3 88 4.9 5.9 83 Grave Springs 8550 -M 2.0 * 1.6 3.8 42 Hobbs Park 10100 2.2 4.7 47 2.9 4.6 63 Kirwin 9550 4.0 3.5 114 5.1 4.2 121 Little Warm 9370 3.4 3.1 110 5.0 4.5 111 South Pass 9040 3.4 4.1 83 4.1 5.6 73 St. Lawrence Alt 8620 .3 2.2 14 1.5 3.3 45 Togwotee Pass 9580 7.4 7.7 96 8.8 7.7 114 Townsend Creek 8700 1.5 2.6 58 2.9 4.4 66 ----- ----- Basin Index (%) 80 83 BIGHORN BASIN Bald Mtn. 9380 5.6 6.0 93 6.3 5.5 115 Bear Trap Meadow 8200 1.1 1.6 69 3.1 3.3 94 Bone Springs Div 9350 5.0 5.3 94 4.5 5.1 88 Grave Springs 8550 -M 2.0 * 1.6 3.8 42 Kirwin 9550 4.0 3.5 114 5.1 4.2 121 Marquette 8760 1.5 -M * 2.3 -M * Middle Powder 7760 .6 3.2 19 2.4 4.6 52 Owl Creek 8975 1.4 1.7 82 1.5 2.2 68 Powder River Pass 9480 3.6 3.2 112 3.2 4.3 74 Shell Creek 9580 5.0 5.1 98 2.7 4.8 56 Timber Creek 7950 1.0 1.7 59 1.6 3.3 48 ----- ----- Basin Index (%) 87 78 SHOSHONE RIVER Blackwater 9780 8.5 7.3 116 8.6 7.0 123 Evening Star 9200 10.5 7.6 138 12.2 9.0 136 Marquette 8760 1.5 -M * 2.3 -M * Sylvan Lake 8420 5.3 5.6 95 8.0 7.8 103 Sylvan Road 7120 3.2 3.0 107 -M 6.3 * Younts Peak 8350 4.8 4.5 107 7.3 5.4 135 ----- ----- Basin Index (%) 115 124 POWDER RIVER Bear Trap Meadow 8200 1.1 1.6 69 3.1 3.3 94 Cloud Peak Reservoir 9860 3.8 4.0 95 4.8 4.9 98 Grave Springs 8550 -M 2.0 * 1.6 3.8 42 Hansen Sawmill 8360 2.1 1.7 124 2.8 3.2 88 Middle Powder 7760 .6 3.2 19 2.4 4.6 52 Powder River Pass 9480 3.6 3.2 112 3.2 4.3 74 Soldier Park 8720 .7 -M * 3.3 -M * ----- ----- Basin Index (%) 82 74 TONGUE RIVER Big Goose 7990 2.1 2.6 81 4.7 4.1 115 Bone Springs Div 9350 5.0 5.3 94 4.5 5.1 88 Burgess Junction 7880 3.0 3.3 91 5.3 4.4 120 Dome Lake 8880 3.2 3.9 82 5.5 5.1 108 Little Goose 8870 2.7 -M * 4.9 -M * Sucker Creek 8880 4.1 3.4 121 6.1 4.9 124 Tie Creek 6870 -M .9 * -M 4.3 * ----- ----- Basin Index (%) 94 111 BELLE FOURCHE Blind Park 6890 .7 1.8 39 3.0 4.5 67 Cole Canyon 5910 .0 .8 0 2.7 3.7 73 North Rapid Creek 6130 1.4 1.6 88 3.1 3.8 82 ----- ----- Basin Index (%) 50 73 CHEYENNE RIVER BASIN Blind Park 6890 .7 1.8 39 3.0 4.5 67 North Rapid Creek 6130 1.4 1.6 88 3.1 3.8 82 ----- ----- Basin Index (%) 62 73 UPPER N. PLATTE Arapaho Ridge 10960 5.3 5.9 90 5.7 7.3 78 Blackhall Mtn 9820 6.4 -M * 7.4 -M * Cinnabar Park 9574 3.5 5.6 62 4.3 7.2 60 Columbine 9160 2.8 4.9 57 3.9 7.4 53 Divide Peak 8880 2.6 4.9 53 4.4 7.1 62 Joe Wright 10120 4.8 6.3 76 6.0 8.4 71 Laprele Creek 8375 .6 2.3 26 1.9 4.3 44 Med Bow 10500 7.8 -M * 7.9 -M * Never Summer 10280 5.5 5.3 104 3.9 -M * North French Creek 10130 4.5 7.5 60 5.0 8.2 61 Old Battle 10000 6.4 8.3 77 6.3 10.6 59 Rawah 9020 -M 2.8 * -M 5.2 * Sage Creek Basin 7850 1.6 2.5 64 2.2 4.8 46 Sand Lake 10050 6.8 7.6 89 6.5 7.7 84 South Brush Creek 8440 1.7 3.0 57 2.5 5.1 49 Tower 10500 5.4 12.0 45 7.0 12.2 57 Webber Springs 9250 5.0 5.4 93 5.2 8.1 64 Whiskey Park 8950 4.2 5.2 81 5.0 7.8 64 Willow Creek Pass 9540 3.1 3.8 82 2.6 4.7 55 Zirkel 9340 3.5 4.9 71 6.3 8.8 72 ----- ----- Basin Index (%) 71 62 SWEETWATER Deer Park 9700 3.8 4.3 88 4.9 5.9 83 Larsen Creek 9000 1.5 2.7 56 2.6 -M * South Pass 9040 3.4 4.1 83 4.1 5.6 73 ----- ----- Basin Index (%) 78 78 LOWER N. PLATTE Casper Mtn. 7900 .3 3.7 8 1.2 5.6 21 Laprele Creek 8375 .6 2.3 26 1.9 4.3 44 Reno Hill 8400 .8 3.9 21 2.1 5.2 40 Windy Peak 7900 .2 1.8 11 1.8 3.8 47 ----- ----- Basin Index (%) 16 37 LARAMIE RIVER Brooklyn Lake 10240 4.3 4.5 96 5.8 6.1 95 Cinnabar Park 9574 3.5 5.6 62 4.3 7.2 60 Crow Creek 8330 .1 2.3 4 2.5 3.7 68 Deadman Hill 10220 4.3 5.0 86 4.6 5.5 84 Rawah 9020 -M 2.8 * -M 5.2 * Roach 9700 3.6 4.3 84 4.0 6.0 67 Windy Peak 7900 .2 1.8 11 1.8 3.8 47 ----- ----- Basin Index (%) 68 71 S. PLATTE Crow Creek 8330 .1 2.3 4 2.5 3.7 68 ----- ----- Basin Index (%) 4 68 LITTLE SNAKE RIVER Battle Mountain 7440 .5 1.7 29 1.6 4.8 33 Divide Peak 8880 2.6 4.9 53 4.4 7.1 62 Elk River 8700 2.7 3.3 82 1.6 6.0 27 Elkhead Divide 8780 2.5 -M * -M -M * Little Snake River 8915 3.0 4.0 75 -M 9.5 * Old Battle 10000 6.4 8.3 77 6.3 10.6 59 Sage Creek Basin 7850 1.6 2.5 64 2.2 4.8 46 Sandstone RS 8150 1.3 2.3 57 2.0 5.7 35 Whiskey Park 8950 4.2 5.2 81 5.0 7.8 64 ----- ----- Basin Index (%) 69 49 UPPER GREEN RIVER Big Sandy Opening 9080 2.1 3.7 57 2.3 4.2 55 Blind Bull Sum 8650 4.9 5.6 88 4.4 6.2 71 East Rim Divide 7930 1.9 2.1 90 3.0 3.6 83 Elkhart Park G.S. 9400 2.4 3.6 67 2.2 4.4 50 Gros Ventre Summit 8750 -M 4.1 * -M 4.3 * Gunsight Pass 9820 3.4 3.4 100 3.6 4.3 84 Indian Creek 9425 4.6 6.2 74 4.7 6.3 75 Kendall R.S. 7740 2.8 2.7 104 4.5 4.2 107 Larsen Creek 9000 1.5 2.7 56 2.6 -M * Loomis Park 8240 2.8 3.4 82 4.4 5.2 85 New Fork Lake 8340 2.2 2.4 92 3.0 3.5 86 Pocket Creek 9360 -M -M * 2.0 -M * Snider Basin 8060 2.5 2.9 86 4.1 4.2 98 Spring Creek Divide 9000 5.0 5.5 91 6.1 7.0 87 Triple Peak 8500 5.7 5.2 110 6.6 7.3 90 ----- ----- Basin Index (%) 85 81 LOWER GREEN RIVER Blacks Fork Jct 8869 1.1 -M * 3.0 -M * Buck Pasture 9632 2.6 -M * 4.2 -M * EF Blacks Fork GS 9360 1.4 -M * 3.1 -M * Hams Fork 7840 2.5 2.5 100 3.1 3.5 89 Henrys Fork 10182 -M -M * 3.1 -M * Hewinta 9500 1.2 2.0 60 4.2 4.8 88 Hickerson Park 9122 1.6 1.6 100 2.8 3.9 72 Hole-in-Rock 9168 .7 1.7 41 2.8 3.7 76 Indian Creek 9425 4.6 6.2 74 4.7 6.3 75 Kelley R.S. 8180 3.0 3.3 91 4.1 5.3 77 Spirit Lk 10235 3.6 -M * 4.0 -M * Steel Creek Park 10158 3.1 4.1 76 4.5 5.5 82 ----- ----- Basin Index (%) 78 79 UPPER BEAR RIVER Bear River RS 8777 1.6 -M * 3.4 -M * Bug Lake 7987 3.3 3.7 89 4.5 5.9 76 Burts Miller Ranch 8000 .5 -M * 2.1 -M * Chalk Creek #1 9171 3.2 5.9 54 5.0 8.0 62 Dry Bread Pond 8302 2.7 3.6 75 4.2 6.1 69 Giveout 6930 1.2 1.5 80 3.3 4.1 80 Hayden Fork 9130 2.2 3.1 71 5.1 6.5 78 Kelley R.S. 8180 3.0 3.3 91 4.1 5.3 77 Lily Lake 9133 2.6 3.1 84 3.7 5.7 65 Monte Cristo 8932 4.4 6.1 72 5.1 7.6 67 Salt River Summit 7640 2.0 2.2 91 3.6 4.7 77 Spring Creek Divide 9000 5.0 5.5 91 6.1 7.0 87 Trial Lake 9992 3.8 5.1 75 4.0 7.1 56 ----- ----- Basin Index (%) 77 72 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.