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: DECEMBER 31 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 7.3 7.4 99 9.1 9.9 92 Blind Bull Sum 8650 9.9 9.5 104 8.6 8.4 102 Cottonwood Creek 7670 8.3 8.5 98 14.2 10.8 131 East Rim Divide 7930 -M 4.4 * -M 5.3 * Grand Targhee 9260 17.7 19.8 89 15.6 16.0 98 Granite Creek 6770 5.9 6.3 94 9.0 8.9 101 Grassy Lake 7265 12.1 12.2 99 18.6 16.4 113 Gros Ventre Summit 8750 6.2 6.2 100 6.7 6.0 112 Gunsight Pass 9820 6.9 5.9 117 7.6 6.8 112 Lewis Lake Divide 7850 14.5 12.7 114 20.4 15.8 129 Loomis Park 8240 5.7 6.4 89 8.5 7.6 112 Phillips Bench 8200 9.6 10.2 94 13.2 12.4 106 Salt River Summit 7640 5.7 4.8 119 10.0 7.0 143 Snake River Station 6920 6.4 6.8 94 11.5 10.6 108 Somsen Ranch 6800 5.7 4.8 119 11.2 8.1 138 Spring Creek Divide 9000 10.6 10.0 106 12.9 10.4 124 Thumb Divide 7980 8.7 6.4 136 11.5 8.4 137 Togwotee Pass 9580 10.6 10.6 100 11.8 11.2 105 Triple Peak 8500 10.2 8.6 119 13.9 10.8 129 Two Ocean Plateau 9240 15.8 13.2 120 13.6 12.3 111 Willow Creek 8080 11.4 10.8 106 17.5 15.0 117 Younts Peak 8350 6.6 6.6 100 4.8 7.2 67 ----- ----- Basin Index (%) 104 114 MADISON HEADWATERS IN WYOMING Black Bear 8170 19.6 16.0 122 -M 17.8 * Canyon 7870 4.5 -M * 7.1 -M * Madison Plateau 7750 11.4 9.8 116 13.8 11.8 117 West Yellowstone 6700 5.5 4.6 120 8.9 7.3 122 Whiskey Creek 6800 7.1 6.0 118 10.2 9.3 110 ----- ----- Basin Index (%) 120 116 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 7.6 9.8 78 7.2 9.2 78 Canyon 7870 4.5 -M * 7.1 -M * Evening Star 9200 13.2 12.2 108 12.6 14.3 88 Fisher Creek 9100 15.2 15.3 99 16.5 15.4 107 Monument Peak 8850 8.4 9.0 93 11.0 10.7 103 Northeast Entrance 7350 2.2 4.0 55 6.0 6.4 94 Parker Peak 9400 9.7 10.4 93 9.6 9.8 98 Sylvan Lake 8420 7.8 8.6 91 12.3 11.6 106 Thumb Divide 7980 8.7 6.4 136 11.5 8.4 137 Two Ocean Plateau 9240 15.8 13.2 120 13.6 12.3 111 White Mill 8700 10.0 10.2 98 10.3 11.0 94 Wolverine 7650 4.9 5.4 91 6.0 6.1 98 ----- ----- Basin Index (%) 99 101 WIND RIVER Burroughs Creek 8750 3.8 -M * 6.5 -M * Castle Creek 8400 1.5 3.3 45 2.8 4.4 64 Cold Springs 9630 5.4 3.6 150 7.3 4.8 152 Deer Park 9700 6.1 6.2 98 9.0 8.4 107 Hobbs Park 10100 8.4 6.2 135 9.4 6.1 154 Kirwin 9550 6.1 5.6 109 6.9 6.2 111 Little Warm 9370 6.1 4.4 139 8.2 6.0 137 South Pass 9040 5.8 6.0 97 7.5 7.0 107 St. Lawrence Alt 8620 .9 -M * 5.7 -M * Togwotee Pass 9580 10.6 10.6 100 11.8 11.2 105 Townsend Creek 8700 4.1 4.0 102 7.0 5.6 125 ----- ----- Basin Index (%) 108 117 BIGHORN BASIN Bald Mtn. 9380 7.3 8.7 84 7.4 7.8 95 Bear Trap Meadow 8200 2.8 2.9 97 4.8 4.2 114 Bone Springs Div 9350 7.1 7.4 96 6.7 7.1 94 Grave Springs 8550 2.3 3.2 72 4.6 4.6 100 Kirwin 9550 6.1 5.6 109 6.9 6.2 111 Marquette 8760 1.1 3.5 31 3.9 4.8 81 Middle Powder 7760 2.9 4.3 67 5.2 5.0 104 Owl Creek 8975 3.1 2.6 119 3.8 3.2 119 Powder River Pass 9480 4.8 5.0 96 4.2 6.2 68 Shell Creek 9580 6.6 7.2 92 7.1 6.6 108 Timber Creek 7950 1.0 2.2 45 2.7 4.0 68 ----- ----- Basin Index (%) 86 96 SHOSHONE RIVER Blackwater 9780 10.6 11.0 96 11.5 10.5 110 Evening Star 9200 13.2 12.2 108 12.6 14.3 88 Marquette 8760 1.1 3.5 31 3.9 4.8 81 Sylvan Lake 8420 7.8 8.6 91 12.3 11.6 106 Sylvan Road 7120 3.6 5.7 63 9.0 8.9 101 Younts Peak 8350 6.6 6.6 100 4.8 7.2 67 ----- ----- Basin Index (%) 90 94 POWDER RIVER Bear Trap Meadow 8200 2.8 2.9 97 4.8 4.2 114 Cloud Peak Reservoir 9860 6.6 6.4 103 7.9 6.4 123 Grave Springs 8550 2.3 3.2 72 4.6 4.6 100 Hansen Sawmill 8360 3.3 3.0 110 5.6 4.2 133 Middle Powder 7760 2.9 4.3 67 5.2 5.0 104 Powder River Pass 9480 4.8 5.0 96 4.2 6.2 68 Soldier Park 8720 .3 2.4 12 5.3 4.4 120 ----- ----- Basin Index (%) 85 107 TONGUE RIVER Big Goose 7990 2.6 3.5 74 6.4 5.0 128 Bone Springs Div 9350 7.1 7.4 96 6.7 7.1 94 Burgess Junction 7880 3.7 4.5 82 6.2 5.6 111 Dome Lake 8880 4.3 4.8 90 7.0 5.8 121 Little Goose 8870 3.6 4.4 82 7.3 5.6 130 Sucker Creek 8880 5.2 5.2 100 7.4 6.2 119 Tie Creek 6870 .8 2.0 40 5.9 5.0 118 ----- ----- Basin Index (%) 86 116 BELLE FOURCHE Blind Park 6890 1.8 3.2 56 4.2 4.8 88 Cole Canyon 5910 .9 2.4 38 4.9 4.0 122 North Rapid Creek 6130 1.8 3.2 56 3.3 3.8 87 ----- ----- Basin Index (%) 51 98 CHEYENNE RIVER BASIN Blind Park 6890 1.8 3.2 56 4.2 4.8 88 North Rapid Creek 6130 1.8 3.2 56 3.3 3.8 87 ----- ----- Basin Index (%) 56 87 UPPER N. PLATTE Arapaho Ridge 10960 9.8 9.8 100 9.6 10.2 94 Blackhall Mtn 9820 14.9 12.2 122 16.8 13.6 124 Cinnabar Park 9574 9.6 8.6 112 12.1 10.8 112 Columbine 9160 8.7 8.6 101 12.6 10.4 121 Divide Peak 8880 8.0 7.6 105 12.6 9.9 127 Joe Wright 10120 9.4 8.2 115 15.5 11.3 137 Laprele Creek 8375 1.6 3.6 44 4.7 5.4 87 Med Bow 10500 17.8 -M * 17.3 -M * Never Summer 10280 10.8 8.4 129 8.3 8.2 101 North French Creek 10130 14.0 11.5 122 15.2 11.9 128 Old Battle 10000 15.5 12.2 127 17.5 14.2 123 Rawah 9020 4.1 4.8 85 7.1 7.6 93 Sage Creek Basin 7850 4.2 5.3 79 6.5 6.3 103 Sand Lake 10050 13.6 11.4 119 14.3 10.6 135 South Brush Creek 8440 4.5 4.6 98 7.3 6.0 122 Tower 10500 19.0 16.6 114 21.6 16.8 129 Webber Springs 9250 11.0 9.0 122 14.2 11.1 128 Whiskey Park 8950 13.9 9.8 142 17.0 12.4 137 Willow Creek Pass 9540 6.9 5.8 119 7.6 6.6 115 Zirkel 9340 11.3 10.6 107 17.3 13.1 132 ----- ----- Basin Index (%) 113 121 SWEETWATER Deer Park 9700 6.1 6.2 98 9.0 8.4 107 Larsen Creek 9000 -M 2.9 * 7.0 5.8 121 South Pass 9040 5.8 6.0 97 7.5 7.0 107 ----- ----- Basin Index (%) 98 111 LOWER N. PLATTE Casper Mtn. 7900 2.6 5.4 48 7.8 6.6 118 Laprele Creek 8375 1.6 3.6 44 4.7 5.4 87 Reno Hill 8400 4.0 5.8 69 7.9 6.6 120 Windy Peak 7900 2.3 3.0 77 5.4 4.7 115 ----- ----- Basin Index (%) 59 111 LARAMIE RIVER Brooklyn Lake 10240 10.6 8.4 126 12.9 8.9 145 Cinnabar Park 9574 9.6 8.6 112 12.1 10.8 112 Crow Creek 8330 1.3 3.8 34 4.4 5.2 85 Deadman Hill 10220 9.6 7.7 125 8.8 8.0 110 Rawah 9020 4.1 4.8 85 7.1 7.6 93 Roach 9700 7.7 6.6 117 10.1 8.9 113 Windy Peak 7900 2.3 3.0 77 5.4 4.7 115 ----- ----- Basin Index (%) 105 112 S. PLATTE Crow Creek 8330 1.3 3.8 34 4.4 5.2 85 ----- ----- Basin Index (%) 34 85 LITTLE SNAKE RIVER Battle Mountain 7440 4.3 4.2 102 9.2 6.6 139 Divide Peak 8880 8.0 7.6 105 12.6 9.9 127 Elk River 8700 9.1 6.5 140 13.5 8.6 157 Elkhead Divide 8780 9.3 -M * 13.4 -M * Little Snake River 8915 10.8 10.0 108 18.5 15.0 123 Old Battle 10000 15.5 12.2 127 17.5 14.2 123 Sage Creek Basin 7850 4.2 5.3 79 6.5 6.3 103 Sandstone RS 8150 5.7 4.9 116 9.4 7.8 121 Whiskey Park 8950 13.9 9.8 142 17.0 12.4 137 ----- ----- Basin Index (%) 118 129 UPPER GREEN RIVER Big Sandy Opening 9080 4.9 5.9 83 7.1 5.9 120 Blind Bull Sum 8650 9.9 9.5 104 8.6 8.4 102 East Rim Divide 7930 -M 4.4 * -M 5.3 * Elkhart Park G.S. 9400 3.8 5.8 66 5.0 6.3 79 Gros Ventre Summit 8750 6.2 6.2 100 6.7 6.0 112 Gunsight Pass 9820 6.9 5.9 117 7.6 6.8 112 Indian Creek 9425 11.6 9.9 117 11.9 9.2 129 Kendall R.S. 7740 4.3 5.2 83 7.6 6.7 113 Larsen Creek 9000 -M 2.9 * 7.0 5.8 121 Loomis Park 8240 5.7 6.4 89 8.5 7.6 112 New Fork Lake 8340 3.7 4.6 80 5.1 5.2 98 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 4.5 5.0 90 9.5 6.4 148 Spring Creek Divide 9000 10.6 10.0 106 12.9 10.4 124 Triple Peak 8500 10.2 8.6 119 13.9 10.8 129 ----- ----- Basin Index (%) 99 117 LOWER GREEN RIVER Blacks Fork Jct 8869 4.5 3.3 136 7.2 5.8 124 Buck Pasture 9632 7.0 -M * 10.3 -M * EF Blacks Fork GS 9360 5.2 4.0 130 7.2 5.2 138 Hams Fork 7840 4.1 4.6 89 7.4 5.2 142 Henrys Fork 10182 -M -M * 7.5 -M * Hewinta 9500 4.4 3.8 116 9.0 6.6 136 Hickerson Park 9122 3.0 3.0 100 5.3 4.9 108 Hole-in-Rock 9168 2.9 2.9 100 5.9 4.9 120 Indian Creek 9425 11.6 9.9 117 11.9 9.2 129 Kelley R.S. 8180 5.4 6.0 90 10.7 7.8 137 Spirit Lk 10235 7.2 5.2 138 9.9 7.8 127 Steel Creek Park 10158 8.0 6.0 133 10.4 7.3 142 ----- ----- Basin Index (%) 116 131 UPPER BEAR RIVER Bear River RS 8777 4.8 3.6 133 8.3 5.3 157 Bug Lake 7987 8.0 6.4 125 11.9 8.0 149 Burts Miller Ranch 8000 3.2 2.3 139 4.4 3.7 119 Chalk Creek #1 9171 11.0 8.8 125 13.7 10.2 134 Giveout 6930 4.1 3.2 128 8.0 5.8 138 Hayden Fork 9130 8.3 5.6 148 13.5 8.8 153 Kelley R.S. 8180 5.4 6.0 90 10.7 7.8 137 Lily Lake 9133 5.3 4.8 110 10.1 7.2 140 Monte Cristo 8932 12.1 9.8 123 14.0 11.0 127 Salt River Summit 7640 5.7 4.8 119 10.0 7.0 143 Spring Creek Divide 9000 10.6 10.0 106 12.9 10.4 124 Trial Lake 9992 12.2 8.4 145 12.4 9.6 129 ----- ----- Basin Index (%) 123 137 ----------------------------------------------------------------------------- -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.