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: DECEMBER 23 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 4.0 6.2 65 6.7 9.0 74 Blind Bull Sum 8650 5.3 8.4 63 5.6 7.8 72 Cottonwood Creek 7670 5.3 7.5 71 11.0 9.3 118 East Rim Divide 7930 1.9 3.6 53 4.0 4.7 85 Grand Targhee 9260 14.2 17.4 82 13.9 14.1 99 Granite Creek 6770 2.3 5.6 41 6.1 8.0 76 Grassy Lake 7265 7.2 10.4 69 13.9 13.4 104 Gros Ventre Summit 8750 3.4 5.2 65 4.3 5.6 77 Gunsight Pass 9820 4.3 4.9 88 5.7 6.3 90 Lewis Lake Divide 7850 8.4 10.9 77 14.7 14.2 104 Loomis Park 8240 2.7 5.5 49 5.4 6.9 78 Phillips Bench 8200 4.9 8.4 58 8.7 10.3 84 Salt River Summit 7640 2.4 4.2 57 6.8 6.0 113 Snake River Station 6920 3.6 5.6 64 8.5 9.6 89 Somsen Ranch 6800 2.3 3.8 61 8.2 6.9 119 Spring Creek Divide 9000 6.5 8.1 80 9.3 8.8 106 Thumb Divide 7980 4.5 5.4 83 8.2 7.5 109 Togwotee Pass 9580 7.3 9.9 74 8.6 9.9 87 Triple Peak 8500 6.0 7.9 76 9.9 9.4 105 Two Ocean Plateau 9240 10.1 11.8 86 9.1 10.8 84 Willow Creek 8080 6.3 9.6 66 12.6 13.5 93 Younts Peak 8350 2.8 -M * 3.3 -M * ----- ----- Basin Index (%) 70 94 MADISON HEADWATERS IN WYOMING Black Bear 8170 12.8 14.2 90 12.2 15.4 79 Canyon 7870 2.8 -M * 5.6 -M * Madison Plateau 7750 6.7 8.3 81 10.2 10.4 98 West Yellowstone 6700 3.1 3.8 82 6.4 5.9 108 Whiskey Creek 6800 4.0 5.1 78 8.7 8.2 106 ----- ----- Basin Index (%) 85 94 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 5.9 8.9 66 5.5 8.3 66 Canyon 7870 2.8 -M * 5.6 -M * Evening Star 9200 8.9 10.4 86 9.3 13.0 72 Fisher Creek 9100 10.9 13.4 81 12.9 13.0 99 Monument Peak 8850 6.7 8.3 81 9.3 9.6 97 Northeast Entrance 7350 1.5 3.1 48 5.2 6.0 87 Parker Peak 9400 7.0 9.0 78 7.1 9.0 79 Sylvan Lake 8420 4.8 7.7 62 9.0 10.2 88 Thumb Divide 7980 4.5 5.4 83 8.2 7.5 109 Two Ocean Plateau 9240 10.1 11.8 86 9.1 10.8 84 White Mill 8700 7.9 9.6 82 8.5 9.6 89 Wolverine 7650 2.3 4.4 52 4.6 5.5 84 ----- ----- Basin Index (%) 77 87 WIND RIVER Burroughs Creek 8750 2.3 -M * 4.8 -M * Castle Creek 8400 .8 3.0 27 2.2 4.2 52 Cold Springs 9630 4.3 3.3 130 6.2 4.4 141 Deer Park 9700 3.6 5.2 69 6.6 7.0 94 Hobbs Park 10100 5.3 5.6 95 7.2 5.2 138 Kirwin 9550 3.8 4.8 79 4.6 5.4 85 Little Warm 9370 4.0 4.0 100 5.8 5.6 104 South Pass 9040 3.4 5.4 63 5.6 6.6 85 St. Lawrence Alt 8620 .3 -M * 4.4 -M * Togwotee Pass 9580 7.3 9.9 74 8.6 9.9 87 Townsend Creek 8700 2.8 3.4 82 5.7 5.2 110 ----- ----- Basin Index (%) 79 98 BIGHORN BASIN Bald Mtn. 9380 6.9 7.6 91 7.1 7.0 101 Bear Trap Meadow 8200 2.4 2.6 92 4.6 4.0 115 Bone Springs Div 9350 5.9 6.7 88 5.9 6.6 89 Grave Springs 8550 1.9 3.0 63 3.8 4.0 95 Kirwin 9550 3.8 4.8 79 4.6 5.4 85 Marquette 8760 1.0 3.3 30 3.6 4.4 82 Middle Powder 7760 -M 3.8 * -M 4.6 * Owl Creek 8975 2.8 2.3 122 3.5 3.0 117 Powder River Pass 9480 3.9 4.4 89 3.8 5.6 68 Shell Creek 9580 5.7 6.8 84 6.2 6.0 103 Timber Creek 7950 .6 1.9 32 2.8 3.8 74 ----- ----- Basin Index (%) 80 92 SHOSHONE RIVER Blackwater 9780 7.8 10.1 77 8.5 9.4 90 Evening Star 9200 8.9 10.4 86 9.3 13.0 72 Marquette 8760 1.0 3.3 30 3.6 4.4 82 Sylvan Lake 8420 4.8 7.7 62 9.0 10.2 88 Sylvan Road 7120 1.7 4.8 35 7.8 8.0 98 Younts Peak 8350 2.8 -M * 3.3 -M * ----- ----- Basin Index (%) 67 85 POWDER RIVER Bear Trap Meadow 8200 2.4 2.6 92 4.6 4.0 115 Cloud Peak Reservoir 9860 5.4 5.5 98 7.0 6.0 117 Grave Springs 8550 1.9 3.0 63 3.8 4.0 95 Hansen Sawmill 8360 3.0 2.6 115 5.4 3.8 142 Middle Powder 7760 -M 3.8 * -M 4.6 * Powder River Pass 9480 3.9 4.4 89 3.8 5.6 68 Soldier Park 8720 .1 2.0 5 4.9 3.9 126 ----- ----- Basin Index (%) 83 108 TONGUE RIVER Big Goose 7990 2.3 3.0 77 6.1 4.4 139 Bone Springs Div 9350 5.9 6.7 88 5.9 6.6 89 Burgess Junction 7880 3.5 4.0 88 5.8 5.0 116 Dome Lake 8880 3.4 4.2 81 6.1 5.4 113 Little Goose 8870 3.0 3.5 86 6.8 5.2 131 Sucker Creek 8880 4.4 4.6 96 6.5 5.8 112 Tie Creek 6870 .8 1.7 47 5.7 4.8 119 ----- ----- Basin Index (%) 84 115 BELLE FOURCHE Blind Park 6890 1.6 2.6 62 4.1 4.6 89 Cole Canyon 5910 .7 1.7 41 4.8 3.8 126 North Rapid Creek 6130 1.7 2.8 61 3.3 3.4 97 ----- ----- Basin Index (%) 56 103 CHEYENNE RIVER BASIN Blind Park 6890 1.6 2.6 62 4.1 4.6 89 North Rapid Creek 6130 1.7 2.8 61 3.3 3.4 97 ----- ----- Basin Index (%) 61 92 UPPER N. PLATTE Arapaho Ridge 10960 6.2 8.8 70 6.4 9.2 70 Blackhall Mtn 9820 8.8 11.2 79 10.8 12.6 86 Cinnabar Park 9574 5.8 7.6 76 8.1 9.4 86 Columbine 9160 5.3 7.9 67 9.3 9.4 99 Divide Peak 8880 4.4 6.6 67 9.1 9.0 101 Joe Wright 10120 5.5 7.5 73 11.3 10.5 108 Laprele Creek 8375 1.0 3.4 29 4.2 4.8 88 Med Bow 10500 11.5 -M * 12.1 -M * Never Summer 10280 6.6 7.9 84 5.8 7.8 74 North French Creek 10130 9.4 10.0 94 11.2 10.6 106 Old Battle 10000 10.3 11.0 94 12.8 13.4 96 Rawah 9020 2.1 4.2 50 5.1 7.0 73 Sage Creek Basin 7850 2.1 4.4 48 4.6 5.7 81 Sand Lake 10050 9.4 10.1 93 10.5 9.8 107 South Brush Creek 8440 2.2 4.1 54 5.5 5.7 96 Tower 10500 14.8 15.2 97 17.1 15.9 108 Webber Springs 9250 6.2 8.2 76 9.4 10.4 90 Whiskey Park 8950 9.1 8.6 106 12.4 11.0 113 Willow Creek Pass 9540 3.7 5.2 71 4.8 6.0 80 Zirkel 9340 5.9 9.1 65 12.0 12.4 97 ----- ----- Basin Index (%) 79 94 SWEETWATER Deer Park 9700 3.6 5.2 69 6.6 7.0 94 Larsen Creek 9000 -M 2.6 * 5.7 5.4 106 South Pass 9040 3.4 5.4 63 5.6 6.6 85 ----- ----- Basin Index (%) 66 94 LOWER N. PLATTE Casper Mtn. 7900 2.4 4.8 50 7.6 6.0 127 Laprele Creek 8375 1.0 3.4 29 4.2 4.8 88 Reno Hill 8400 3.7 5.4 69 7.4 6.0 123 Windy Peak 7900 1.2 2.8 43 4.5 4.5 100 ----- ----- Basin Index (%) 51 111 LARAMIE RIVER Brooklyn Lake 10240 5.7 7.2 79 8.4 7.6 111 Cinnabar Park 9574 5.8 7.6 76 8.1 9.4 86 Crow Creek 8330 .1 3.4 3 3.2 4.6 70 Deadman Hill 10220 6.0 7.0 86 5.7 7.2 79 Rawah 9020 2.1 4.2 50 5.1 7.0 73 Roach 9700 4.3 5.8 74 6.4 7.8 82 Windy Peak 7900 1.2 2.8 43 4.5 4.5 100 ----- ----- Basin Index (%) 66 86 S. PLATTE Crow Creek 8330 .1 3.4 3 3.2 4.6 70 ----- ----- Basin Index (%) 3 70 LITTLE SNAKE RIVER Battle Mountain 7440 2.4 3.4 71 7.1 6.1 116 Divide Peak 8880 4.4 6.6 67 9.1 9.0 101 Elk River 8700 4.4 5.8 76 9.3 7.8 119 Elkhead Divide 8780 4.4 -M * 8.9 -M * Little Snake River 8915 6.2 8.6 72 13.3 13.6 98 Old Battle 10000 10.3 11.0 94 12.8 13.4 96 Sage Creek Basin 7850 2.1 4.4 48 4.6 5.7 81 Sandstone RS 8150 3.0 4.2 71 7.3 7.2 101 Whiskey Park 8950 9.1 8.6 106 12.4 11.0 113 ----- ----- Basin Index (%) 80 103 UPPER GREEN RIVER Big Sandy Opening 9080 3.3 4.8 69 5.7 5.2 110 Blind Bull Sum 8650 5.3 8.4 63 5.6 7.8 72 East Rim Divide 7930 1.9 3.6 53 4.0 4.7 85 Elkhart Park G.S. 9400 2.8 4.6 61 4.3 5.8 74 Gros Ventre Summit 8750 3.4 5.2 65 4.3 5.6 77 Gunsight Pass 9820 4.3 4.9 88 5.7 6.3 90 Indian Creek 9425 6.7 8.1 83 8.3 7.8 106 Kendall R.S. 7740 1.7 4.3 40 5.1 5.8 88 Larsen Creek 9000 -M 2.6 * 5.7 5.4 106 Loomis Park 8240 2.7 5.5 49 5.4 6.9 78 New Fork Lake 8340 2.2 4.0 55 -M 4.4 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 1.6 4.4 36 6.4 5.6 114 Spring Creek Divide 9000 6.5 8.1 80 9.3 8.8 106 Triple Peak 8500 6.0 7.9 76 9.9 9.4 105 ----- ----- Basin Index (%) 66 94 LOWER GREEN RIVER Blacks Fork Jct 8869 2.2 2.8 79 4.5 5.2 87 Buck Pasture 9632 3.8 -M * 7.3 -M * EF Blacks Fork GS 9360 1.6 3.7 43 6.1 5.0 122 Hams Fork 7840 1.6 3.8 42 5.8 4.7 123 Henrys Fork 10182 -M -M * 5.2 -M * Hewinta 9500 1.7 3.2 53 6.4 6.1 105 Hickerson Park 9122 2.0 2.4 83 4.3 4.7 91 Hole-in-Rock 9168 1.9 2.8 68 4.9 4.6 107 Indian Creek 9425 6.7 8.1 83 8.3 7.8 106 Kelley R.S. 8180 2.3 5.2 44 7.8 6.8 115 Spirit Lk 10235 4.8 4.7 102 7.8 7.3 107 Steel Creek Park 10158 5.6 5.4 104 7.8 6.8 115 ----- ----- Basin Index (%) 72 108 UPPER BEAR RIVER Bear River RS 8777 1.9 3.2 59 5.7 5.2 110 Bug Lake 7987 3.0 5.7 53 7.9 7.2 110 Burts Miller Ranch 8000 2.5 2.4 104 3.5 3.4 103 Chalk Creek #1 9171 5.7 8.0 71 9.2 9.4 98 Giveout 6930 1.3 2.8 46 5.5 5.2 106 Hayden Fork 9130 4.0 4.6 87 9.0 8.2 110 Kelley R.S. 8180 2.3 5.2 44 7.8 6.8 115 Lily Lake 9133 1.6 4.5 36 6.9 6.8 101 Monte Cristo 8932 6.2 8.8 70 10.4 9.9 105 Salt River Summit 7640 2.4 4.2 57 6.8 6.0 113 Spring Creek Divide 9000 6.5 8.1 80 9.3 8.8 106 Trial Lake 9992 5.0 7.4 68 8.7 8.5 102 ----- ----- Basin Index (%) 65 106 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1991-2020. 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 or average for the day is less than 10% of the maximum median or average value for the year. * Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages 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.