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: JANUARY 20 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 9.9 10.2 97 11.0 12.7 87 Blind Bull Sum 8650 12.5 12.7 98 9.2 10.9 84 Cottonwood Creek 7670 12.9 11.6 111 14.0 13.4 104 East Rim Divide 7930 6.1 6.2 98 6.3 6.7 94 Grand Targhee 9260 25.1 23.6 106 15.6 18.9 83 Granite Creek 6770 9.1 9.2 99 8.4 11.5 73 Grassy Lake 7265 16.6 17.0 98 20.1 20.9 96 Gros Ventre Summit 8750 7.3 7.4 99 6.9 7.2 96 Gunsight Pass 9820 7.5 7.3 103 7.3 8.0 91 Lewis Lake Divide 7850 20.3 16.2 125 22.2 20.2 110 Loomis Park 8240 8.4 8.3 101 8.6 9.6 90 Phillips Bench 8200 15.3 13.5 113 16.2 15.4 105 Salt River Summit 7640 9.7 6.8 143 9.8 8.7 113 Snake River Station 6920 10.9 9.6 114 12.9 13.8 93 Somsen Ranch 6800 9.6 7.1 135 11.2 9.9 113 Spring Creek Divide 9000 13.6 13.2 103 14.5 13.1 111 Thumb Divide 7980 12.3 8.2 150 11.7 9.6 122 Togwotee Pass 9580 12.5 12.9 97 12.2 13.8 88 Triple Peak 8500 13.5 11.8 114 13.6 14.0 97 Two Ocean Plateau 9240 18.0 17.4 103 14.5 15.4 94 Willow Creek 8080 18.9 15.2 124 18.9 18.0 105 Younts Peak 8350 8.9 8.6 103 8.0 8.6 93 ----- ----- Basin Index (%) 110 97 MADISON HEADWATERS IN WYOMING Black Bear 8170 24.7 21.3 116 24.8 21.8 114 Canyon 7870 8.4 -M * 10.3 -M * Madison Plateau 7750 17.1 12.6 136 18.0 14.8 122 West Yellowstone 6700 9.6 6.2 155 12.3 8.2 150 Whiskey Creek 6800 12.2 8.2 149 15.9 11.3 141 ----- ----- Basin Index (%) 132 127 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 9.9 13.2 75 9.0 12.0 75 Canyon 7870 8.4 -M * 10.3 -M * Evening Star 9200 14.2 15.9 89 16.4 17.1 96 Fisher Creek 9100 19.7 19.4 102 20.6 18.8 110 Monument Peak 8850 11.6 12.3 94 13.8 13.5 102 Northeast Entrance 7350 5.3 5.6 95 7.6 7.6 100 Parker Peak 9400 13.0 12.1 107 13.4 12.1 111 Sylvan Lake 8420 10.6 11.3 94 13.6 13.7 99 Thumb Divide 7980 12.3 8.2 150 11.7 9.6 122 Two Ocean Plateau 9240 18.0 17.4 103 14.5 15.4 94 White Mill 8700 13.9 14.2 98 13.7 13.7 100 Wolverine 7650 6.1 7.0 87 6.9 7.8 88 ----- ----- Basin Index (%) 99 100 WIND RIVER Burroughs Creek 8750 5.9 -M * 6.7 -M * Castle Creek 8400 3.6 4.3 84 4.2 5.6 75 Cold Springs 9630 5.0 4.4 114 6.2 5.7 109 Deer Park 9700 14.2 7.4 192 14.2 9.1 156 Hobbs Park 10100 9.7 7.2 135 9.0 6.8 132 Kirwin 9550 5.3 6.4 83 7.0 7.2 97 Little Warm 9370 5.9 5.6 105 6.8 7.4 92 South Pass 9040 11.0 7.4 149 10.8 8.2 132 St. Lawrence Alt 8620 4.4 -M * 6.2 -M * Togwotee Pass 9580 12.5 12.9 97 12.2 13.8 88 Townsend Creek 8700 6.8 4.6 148 7.7 6.2 124 ----- ----- Basin Index (%) 123 112 BIGHORN BASIN Bald Mtn. 9380 8.7 10.2 85 7.4 9.2 80 Bear Trap Meadow 8200 4.6 3.6 128 5.4 4.8 112 Bone Springs Div 9350 5.9 9.2 64 5.9 8.6 69 Grave Springs 8550 5.9 4.1 144 6.3 5.2 121 Kirwin 9550 5.3 6.4 83 7.0 7.2 97 Marquette 8760 3.9 3.8 103 4.6 5.4 85 Middle Powder 7760 6.6 5.2 127 5.9 5.8 102 Owl Creek 8975 4.4 3.1 142 5.0 3.7 135 Powder River Pass 9480 5.1 6.2 82 6.5 7.5 87 Shell Creek 9580 6.0 8.6 70 6.8 8.0 85 Timber Creek 7950 2.9 2.6 112 3.3 4.4 75 ----- ----- Basin Index (%) 94 92 SHOSHONE RIVER Blackwater 9780 11.6 13.8 84 11.5 13.0 88 Evening Star 9200 14.2 15.9 89 16.4 17.1 96 Marquette 8760 3.9 3.8 103 4.6 5.4 85 Sylvan Lake 8420 10.6 11.3 94 13.6 13.7 99 Sylvan Road 7120 5.7 7.2 79 8.3 10.8 77 Younts Peak 8350 8.9 8.6 103 8.0 8.6 93 ----- ----- Basin Index (%) 91 91 POWDER RIVER Bear Trap Meadow 8200 4.6 3.6 128 5.4 4.8 112 Cloud Peak Reservoir 9860 6.9 7.8 88 7.1 7.6 93 Grave Springs 8550 5.9 4.1 144 6.3 5.2 121 Hansen Sawmill 8360 3.8 3.8 100 4.2 4.8 88 Middle Powder 7760 6.6 5.2 127 5.9 5.8 102 Powder River Pass 9480 5.1 6.2 82 6.5 7.5 87 Soldier Park 8720 2.0 3.4 59 3.6 5.2 69 ----- ----- Basin Index (%) 102 95 TONGUE RIVER Big Goose 7990 4.6 4.2 110 5.4 5.7 95 Bone Springs Div 9350 5.9 9.2 64 5.9 8.6 69 Burgess Junction 7880 6.0 5.6 107 7.9 6.8 116 Dome Lake 8880 4.2 6.0 70 6.0 7.0 86 Little Goose 8870 -M 5.0 * -M 6.4 * Sucker Creek 8880 6.3 6.6 95 8.3 7.5 111 Tie Creek 6870 3.5 3.2 109 6.4 6.0 107 ----- ----- Basin Index (%) 88 96 BELLE FOURCHE Blind Park 6890 4.0 4.0 100 5.4 5.8 93 Cole Canyon 5910 3.5 2.8 125 4.7 5.0 94 North Rapid Creek 6130 3.8 3.8 100 4.6 4.6 100 ----- ----- Basin Index (%) 107 95 CHEYENNE RIVER BASIN Blind Park 6890 4.0 4.0 100 5.4 5.8 93 North Rapid Creek 6130 3.8 3.8 100 4.6 4.6 100 ----- ----- Basin Index (%) 100 96 UPPER N. PLATTE Arapaho Ridge 10976 15.2 12.0 127 15.2 12.4 123 Blackhall Mtn 9839 19.8 15.2 130 20.2 16.2 125 Cinnabar Park 9707 -M 11.6 * 12.9 13.8 93 Columbine 9167 16.3 12.6 129 16.0 13.4 119 Divide Peak 8730 14.3 10.4 138 16.2 12.4 131 Joe Wright 10158 13.7 10.4 132 16.5 14.4 115 Laprele Creek 8390 5.8 4.8 121 6.2 6.4 97 Med Bow 10512 19.5 -M * 18.2 -M * Never Summer 10323 14.9 10.5 142 10.6 9.7 109 North French Creek 10153 15.5 15.0 103 15.5 15.0 103 Old Battle 9860 21.9 16.2 135 23.3 19.4 120 Rawah 9069 9.2 6.2 148 10.5 9.2 114 Sage Creek Basin 7850 12.4 7.5 165 12.5 7.7 162 Sand Lake 10098 14.2 14.4 99 14.3 12.9 111 South Brush Creek 8495 8.3 6.3 132 7.8 8.0 98 Tower 10620 30.7 22.6 136 29.0 22.7 128 Webber Springs 9260 15.7 12.0 131 17.1 14.9 115 Whiskey Park 9020 22.1 14.6 151 21.0 16.8 125 Willow Creek Pass 9523 10.1 6.8 149 10.6 7.2 147 Zirkel 9338 16.4 15.3 107 18.9 17.0 111 ----- ----- Basin Index (%) 130 118 SWEETWATER Deer Park 9700 14.2 7.4 192 14.2 9.1 156 Larsen Creek 9000 6.0 4.6 130 8.4 7.4 114 South Pass 9040 11.0 7.4 149 10.8 8.2 132 ----- ----- Basin Index (%) 161 135 LOWER N. PLATTE Casper Mtn. 7920 7.3 6.4 114 7.5 7.5 100 Laprele Creek 8390 5.8 4.8 121 6.2 6.4 97 Reno Hill 8430 7.8 7.0 111 9.2 8.0 115 Windy Peak 7915 4.9 3.9 126 6.0 5.8 103 ----- ----- Basin Index (%) 117 104 LARAMIE RIVER Brooklyn Lake 10250 12.8 11.5 111 13.6 11.9 114 Cinnabar Park 9707 -M 11.6 * 12.9 13.8 93 Crow Creek 8335 3.3 4.6 72 5.4 6.1 89 Deadman Hill 10239 10.5 9.8 107 9.7 9.6 101 Rawah 9069 9.2 6.2 148 10.5 9.2 114 Roach 9740 10.9 8.9 122 12.3 10.6 116 Windy Peak 7915 4.9 3.9 126 6.0 5.8 103 ----- ----- Basin Index (%) 115 105 S. PLATTE Crow Creek 8335 3.3 4.6 72 5.4 6.1 89 ----- ----- Basin Index (%) 72 89 LITTLE SNAKE RIVER Battle Mountain 7498 10.1 6.4 158 13.8 8.8 157 Divide Peak 8730 14.3 10.4 138 16.2 12.4 131 Elk River 8739 16.3 9.7 168 15.3 10.8 142 Elkhead Divide 8800 18.1 -M * 18.5 -M * Little Snake River 8928 21.1 14.0 151 25.1 19.2 131 Old Battle 9860 21.9 16.2 135 23.3 19.4 120 Sage Creek Basin 7850 12.4 7.5 165 12.5 7.7 162 Sandstone RS 8152 13.7 7.2 190 15.2 10.6 143 Whiskey Park 9020 22.1 14.6 151 21.0 16.8 125 ----- ----- Basin Index (%) 153 135 UPPER GREEN RIVER Big Sandy Opening 9080 8.8 7.2 122 8.6 7.2 119 Blind Bull Sum 8650 12.5 12.7 98 9.2 10.9 84 East Rim Divide 7930 6.1 6.2 98 6.3 6.7 94 Elkhart Park G.S. 9400 7.2 7.0 103 6.5 7.6 86 Gros Ventre Summit 8750 7.3 7.4 99 6.9 7.2 96 Gunsight Pass 9820 7.5 7.3 103 7.3 8.0 91 Indian Creek 9425 15.6 12.2 128 13.2 11.2 118 Kendall R.S. 7740 6.6 6.8 97 7.0 8.2 85 Larsen Creek 9000 6.0 4.6 130 8.4 7.4 114 Loomis Park 8240 8.4 8.3 101 8.6 9.6 90 New Fork Lake 8340 6.3 6.2 102 -M 6.6 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 7.2 7.3 99 8.5 8.0 106 Spring Creek Divide 9000 13.6 13.2 103 14.5 13.1 111 Triple Peak 8500 13.5 11.8 114 13.6 14.0 97 ----- ----- Basin Index (%) 107 100 LOWER GREEN RIVER Blacks Fork Jct 8869 8.1 4.4 184 8.3 6.8 122 Buck Pasture 9632 11.1 -M * 12.8 -M * EF Blacks Fork GS 9360 9.2 5.2 177 7.0 6.0 117 Hams Fork 7840 8.5 6.0 142 8.4 6.2 135 Henrys Fork 10182 -M -M * 8.6 -M * Hewinta 9500 7.0 5.0 140 9.0 7.7 117 Hickerson Park 9122 5.7 3.6 158 6.5 5.6 116 Hole-in-Rock 9168 5.4 3.7 146 6.3 5.8 109 Indian Creek 9425 15.6 12.2 128 13.2 11.2 118 Kelley R.S. 8180 11.4 7.4 154 11.9 9.7 123 Spirit Lk 10235 11.2 6.2 181 10.9 8.7 125 Steel Creek Park 10158 11.3 7.4 153 11.2 8.8 127 ----- ----- Basin Index (%) 153 121 UPPER BEAR RIVER Bear River RS 8777 7.4 4.7 157 8.9 6.6 135 Bug Lake 7987 14.5 8.4 173 12.3 9.7 127 Burts Miller Ranch 8000 5.7 3.2 178 9.0 4.8 188 Chalk Creek #1 9171 17.1 11.0 155 17.4 12.6 138 Giveout 6930 7.3 5.1 143 8.5 7.0 121 Hayden Fork 9130 11.2 7.0 160 14.8 10.9 136 Kelley R.S. 8180 11.4 7.4 154 11.9 9.7 123 Lily Lake 9133 9.8 6.6 148 9.9 8.6 115 Monte Cristo 8932 20.6 13.1 157 19.8 13.6 146 Salt River Summit 7640 9.7 6.8 143 9.8 8.7 113 Spring Creek Divide 9000 13.6 13.2 103 14.5 13.1 111 Trial Lake 9992 19.8 10.9 182 19.9 12.2 163 ----- ----- Basin Index (%) 152 133 ----------------------------------------------------------------------------- -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.