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 SATURDAY: DECEMBER 25 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 5.3 6.4 83 7.9 9.2 86 Blind Bull Sum 8650 7.5 8.4 89 6.9 7.9 87 Cottonwood Creek 7670 6.5 7.8 83 12.3 9.8 126 East Rim Divide 7930 2.7 3.8 71 4.8 4.8 100 Grand Targhee 9260 16.4 18.0 91 14.9 15.0 99 Granite Creek 6770 3.7 5.9 63 -M 8.2 * Grassy Lake 7265 9.2 11.0 84 15.7 14.0 112 Gros Ventre Summit 8750 4.7 5.3 89 5.0 5.8 86 Gunsight Pass 9820 5.5 5.0 110 6.6 6.4 103 Lewis Lake Divide 7850 11.1 11.2 99 17.3 14.6 118 Loomis Park 8240 3.8 5.6 68 6.6 7.0 94 Phillips Bench 8200 6.5 9.2 71 10.2 10.8 94 Salt River Summit 7640 3.6 4.4 82 8.0 6.2 129 Snake River Station 6920 4.8 6.0 80 9.8 9.6 102 Somsen Ranch 6800 3.7 4.0 92 9.5 7.0 136 Spring Creek Divide 9000 8.5 8.7 98 10.9 9.4 116 Thumb Divide 7980 6.0 5.6 107 9.4 7.8 121 Togwotee Pass 9580 8.6 9.9 87 9.8 10.4 94 Triple Peak 8500 7.9 8.2 96 11.7 9.8 119 Two Ocean Plateau 9240 12.7 12.0 106 11.3 11.0 103 Willow Creek 8080 8.6 9.8 88 14.8 14.1 105 Younts Peak 8350 3.8 5.8 66 3.4 6.4 53 ----- ----- Basin Index (%) 88 105 MADISON HEADWATERS IN WYOMING Black Bear 8170 15.4 14.9 103 12.1 15.8 77 Canyon 7870 3.2 -M * 5.7 -M * Madison Plateau 7750 8.4 8.6 98 11.4 10.5 109 West Yellowstone 6700 3.8 4.2 90 7.1 6.0 118 Whiskey Creek 6800 5.2 5.4 96 9.5 8.3 114 ----- ----- Basin Index (%) 99 99 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 6.6 9.0 73 6.4 8.5 75 Canyon 7870 3.2 -M * 5.7 -M * Evening Star 9200 10.3 10.8 95 10.4 13.4 78 Fisher Creek 9100 12.7 13.6 93 14.3 13.3 108 Monument Peak 8850 7.4 8.7 85 10.0 10.0 100 Northeast Entrance 7350 1.7 3.3 52 5.4 6.2 87 Parker Peak 9400 8.0 9.2 87 8.0 9.2 87 Sylvan Lake 8420 6.0 8.0 75 10.3 10.6 97 Thumb Divide 7980 6.0 5.6 107 9.4 7.8 121 Two Ocean Plateau 9240 12.7 12.0 106 11.3 11.0 103 White Mill 8700 8.4 9.8 86 9.0 9.8 92 Wolverine 7650 3.3 4.6 72 5.2 5.7 91 ----- ----- Basin Index (%) 88 95 WIND RIVER Burroughs Creek 8750 3.1 -M * 5.5 -M * Castle Creek 8400 1.0 3.1 32 2.4 4.4 55 Cold Springs 9630 4.8 3.4 141 6.6 4.4 150 Deer Park 9700 4.8 5.4 89 7.6 7.3 104 Hobbs Park 10100 6.3 5.8 109 8.1 5.6 145 Kirwin 9550 4.8 5.2 92 5.5 5.5 100 Little Warm 9370 5.0 4.0 125 6.9 5.8 119 South Pass 9040 4.3 5.6 77 6.3 6.6 95 St. Lawrence Alt 8620 .7 -M * 5.0 -M * Togwotee Pass 9580 8.6 9.9 87 9.8 10.4 94 Townsend Creek 8700 3.3 3.8 87 6.3 5.3 119 ----- ----- Basin Index (%) 93 108 BIGHORN BASIN Bald Mtn. 9380 7.1 7.8 91 7.3 7.2 101 Bear Trap Meadow 8200 2.4 2.6 92 4.7 4.1 115 Bone Springs Div 9350 6.5 6.8 96 6.1 6.6 92 Grave Springs 8550 2.0 3.0 67 4.0 4.0 100 Kirwin 9550 4.8 5.2 92 5.5 5.5 100 Marquette 8760 1.0 3.4 29 3.7 4.4 84 Middle Powder 7760 2.8 3.8 74 5.1 4.8 106 Owl Creek 8975 2.9 2.4 121 3.7 3.0 123 Powder River Pass 9480 4.1 4.4 93 3.9 5.8 67 Shell Creek 9580 6.0 6.9 87 6.5 6.2 105 Timber Creek 7950 .8 1.9 42 2.7 3.8 71 ----- ----- Basin Index (%) 84 96 SHOSHONE RIVER Blackwater 9780 9.2 10.4 88 9.9 9.8 101 Evening Star 9200 10.3 10.8 95 10.4 13.4 78 Marquette 8760 1.0 3.4 29 3.7 4.4 84 Sylvan Lake 8420 6.0 8.0 75 10.3 10.6 97 Sylvan Road 7120 2.6 4.9 53 7.9 8.2 96 Younts Peak 8350 3.8 5.8 66 3.4 6.4 53 ----- ----- Basin Index (%) 76 86 POWDER RIVER Bear Trap Meadow 8200 2.4 2.6 92 4.7 4.1 115 Cloud Peak Reservoir 9860 5.9 5.8 102 7.4 6.2 119 Grave Springs 8550 2.0 3.0 67 4.0 4.0 100 Hansen Sawmill 8360 3.0 2.7 111 5.3 3.8 139 Middle Powder 7760 2.8 3.8 74 5.1 4.8 106 Powder River Pass 9480 4.1 4.4 93 3.9 5.8 67 Soldier Park 8720 .3 2.0 15 5.1 4.0 128 ----- ----- Basin Index (%) 84 109 TONGUE RIVER Big Goose 7990 2.4 3.2 75 6.3 4.5 140 Bone Springs Div 9350 6.5 6.8 96 6.1 6.6 92 Burgess Junction 7880 3.6 4.2 86 5.9 5.1 116 Dome Lake 8880 3.7 4.4 84 6.5 5.4 120 Little Goose 8870 3.2 3.7 86 7.0 5.2 135 Sucker Creek 8880 4.7 4.8 98 6.9 6.0 115 Tie Creek 6870 .9 1.8 50 5.8 4.8 121 ----- ----- Basin Index (%) 87 118 BELLE FOURCHE Blind Park 6890 1.7 2.6 65 4.2 4.6 91 Cole Canyon 5910 .7 1.8 39 4.9 4.0 122 North Rapid Creek 6130 1.7 2.8 61 3.3 3.4 97 ----- ----- Basin Index (%) 57 103 CHEYENNE RIVER BASIN Blind Park 6890 1.7 2.6 65 4.2 4.6 91 North Rapid Creek 6130 1.7 2.8 61 3.3 3.4 97 ----- ----- Basin Index (%) 63 94 UPPER N. PLATTE Arapaho Ridge 10960 8.1 8.9 91 8.2 9.4 87 Blackhall Mtn 9820 10.8 11.3 96 12.8 12.9 99 Cinnabar Park 9574 6.9 8.0 86 9.3 9.7 96 Columbine 9160 6.8 8.0 85 10.9 9.7 112 Divide Peak 8880 5.5 6.8 81 10.1 9.1 111 Joe Wright 10120 7.8 7.7 101 13.5 10.6 127 Laprele Creek 8375 1.2 3.4 35 4.4 5.0 88 Med Bow 10500 13.5 -M * 13.9 -M * Never Summer 10280 8.6 8.0 108 7.2 8.0 90 North French Creek 10130 10.9 10.2 107 12.5 10.9 115 Old Battle 10000 12.3 11.4 108 14.7 13.7 107 Rawah 9020 3.3 4.4 75 6.3 7.2 88 Sage Creek Basin 7850 2.7 4.6 59 5.1 5.8 88 Sand Lake 10050 10.7 10.6 101 11.7 10.0 117 South Brush Creek 8440 2.9 4.1 71 6.1 5.8 105 Tower 10500 16.8 15.6 108 19.6 16.2 121 Webber Springs 9250 8.0 8.6 93 11.2 10.7 105 Whiskey Park 8950 11.1 8.8 126 14.1 11.2 126 Willow Creek Pass 9540 5.4 5.3 102 6.3 6.1 103 Zirkel 9340 8.1 9.8 83 14.1 12.8 110 ----- ----- Basin Index (%) 95 107 SWEETWATER Deer Park 9700 4.8 5.4 89 7.6 7.3 104 Larsen Creek 9000 -M 2.8 * 6.1 5.6 109 South Pass 9040 4.3 5.6 77 6.3 6.6 95 ----- ----- Basin Index (%) 83 103 LOWER N. PLATTE Casper Mtn. 7900 2.5 4.8 52 7.6 6.2 123 Laprele Creek 8375 1.2 3.4 35 4.4 5.0 88 Reno Hill 8400 3.8 5.6 68 7.5 6.4 117 Windy Peak 7900 1.5 3.0 50 4.7 4.6 102 ----- ----- Basin Index (%) 54 109 LARAMIE RIVER Brooklyn Lake 10240 7.2 7.6 95 9.9 8.0 124 Cinnabar Park 9574 6.9 8.0 86 9.3 9.7 96 Crow Creek 8330 .3 3.4 9 3.4 4.6 74 Deadman Hill 10220 7.5 7.2 104 7.0 7.4 95 Rawah 9020 3.3 4.4 75 6.3 7.2 88 Roach 9700 5.8 6.2 94 8.0 8.0 100 Windy Peak 7900 1.5 3.0 50 4.7 4.6 102 ----- ----- Basin Index (%) 82 98 S. PLATTE Crow Creek 8330 .3 3.4 9 3.4 4.6 74 ----- ----- Basin Index (%) 9 74 LITTLE SNAKE RIVER Battle Mountain 7440 3.2 3.6 89 8.0 6.2 129 Divide Peak 8880 5.5 6.8 81 10.1 9.1 111 Elk River 8700 6.0 5.8 103 10.8 7.8 138 Elkhead Divide 8780 6.1 -M * 10.4 -M * Little Snake River 8915 8.5 9.3 91 15.7 14.0 112 Old Battle 10000 12.3 11.4 108 14.7 13.7 107 Sage Creek Basin 7850 2.7 4.6 59 5.1 5.8 88 Sandstone RS 8150 4.2 4.2 100 8.2 7.4 111 Whiskey Park 8950 11.1 8.8 126 14.1 11.2 126 ----- ----- Basin Index (%) 98 115 UPPER GREEN RIVER Big Sandy Opening 9080 3.9 5.0 78 6.2 5.2 119 Blind Bull Sum 8650 7.5 8.4 89 6.9 7.9 87 East Rim Divide 7930 2.7 3.8 71 4.8 4.8 100 Elkhart Park G.S. 9400 3.0 4.8 62 4.4 5.9 75 Gros Ventre Summit 8750 4.7 5.3 89 5.0 5.8 86 Gunsight Pass 9820 5.5 5.0 110 6.6 6.4 103 Indian Creek 9425 8.7 8.5 102 9.7 8.1 120 Kendall R.S. 7740 2.9 4.4 66 6.2 6.0 103 Larsen Creek 9000 -M 2.8 * 6.1 5.6 109 Loomis Park 8240 3.8 5.6 68 6.6 7.0 94 New Fork Lake 8340 2.8 4.1 68 3.9 4.6 85 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 2.8 4.6 61 7.6 5.8 131 Spring Creek Divide 9000 8.5 8.7 98 10.9 9.4 116 Triple Peak 8500 7.9 8.2 96 11.7 9.8 119 ----- ----- Basin Index (%) 85 105 LOWER GREEN RIVER Blacks Fork Jct 8869 3.2 3.2 100 5.5 5.6 98 Buck Pasture 9632 4.9 -M * 8.3 -M * EF Blacks Fork GS 9360 2.4 3.8 63 6.4 5.1 125 Hams Fork 7840 2.6 4.2 62 6.4 4.8 133 Henrys Fork 10182 -M -M * 6.2 -M * Hewinta 9500 2.8 3.2 88 7.4 6.2 119 Hickerson Park 9122 2.5 2.7 93 4.8 4.7 102 Hole-in-Rock 9168 2.3 2.9 79 5.3 4.6 115 Indian Creek 9425 8.7 8.5 102 9.7 8.1 120 Kelley R.S. 8180 3.6 5.4 67 9.0 7.0 129 Spirit Lk 10235 5.9 4.9 120 8.7 7.7 113 Steel Creek Park 10158 6.4 5.6 114 8.7 7.0 124 ----- ----- Basin Index (%) 91 118 UPPER BEAR RIVER Bear River RS 8777 2.9 3.4 85 6.7 5.2 129 Bug Lake 7987 5.3 5.8 91 9.9 7.6 130 Burts Miller Ranch 8000 2.9 2.4 121 3.8 3.4 112 Chalk Creek #1 9171 7.6 8.4 90 10.9 9.6 114 Giveout 6930 2.4 2.8 86 6.5 5.4 120 Hayden Fork 9130 5.3 4.9 108 10.3 8.2 126 Kelley R.S. 8180 3.6 5.4 67 9.0 7.0 129 Lily Lake 9133 2.8 4.6 61 8.1 7.0 116 Monte Cristo 8932 8.3 9.0 92 12.2 10.0 122 Salt River Summit 7640 3.6 4.4 82 8.0 6.2 129 Spring Creek Divide 9000 8.5 8.7 98 10.9 9.4 116 Trial Lake 9992 7.6 7.7 99 10.9 8.8 124 ----- ----- Basin Index (%) 90 122 ----------------------------------------------------------------------------- -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.