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 WEDNESDAY: JANUARY 18 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.0 9.8 102 11.0 12.4 89 Blind Bull Sum 8650 12.6 12.6 100 9.1 10.7 85 Cottonwood Creek 7670 -M 11.0 * -M 13.2 * East Rim Divide 7930 6.1 5.8 105 6.2 6.6 94 Grand Targhee 9260 25.0 23.0 109 15.5 18.1 86 Granite Creek 6770 9.1 8.8 103 8.3 11.2 74 Grassy Lake 7265 16.5 16.4 101 20.1 19.5 103 Gros Ventre Summit 8750 7.2 7.2 100 6.8 7.0 97 Gunsight Pass 9820 7.4 7.2 103 7.2 7.9 91 Lewis Lake Divide 7850 20.1 16.0 126 22.1 19.4 114 Loomis Park 8240 8.4 8.2 102 8.6 9.4 91 Phillips Bench 8200 15.2 13.3 114 16.2 15.1 107 Salt River Summit 7640 9.7 6.4 152 9.9 8.5 116 Snake River Station 6920 10.9 9.0 121 12.8 13.5 95 Somsen Ranch 6800 9.7 6.8 143 11.2 9.4 119 Spring Creek Divide 9000 13.8 13.0 106 14.5 12.6 115 Thumb Divide 7980 12.1 8.0 151 11.5 9.5 121 Togwotee Pass 9580 12.5 12.9 97 12.2 13.6 90 Triple Peak 8500 13.5 11.6 116 13.6 13.6 100 Two Ocean Plateau 9240 17.9 16.8 107 14.5 15.4 94 Willow Creek 8080 18.9 14.6 129 18.9 18.0 105 Younts Peak 8350 8.9 8.2 109 8.0 8.2 98 ----- ----- Basin Index (%) 113 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 24.6 21.0 117 24.6 21.0 117 Canyon 7870 8.3 -M * 10.2 -M * Madison Plateau 7750 17.0 12.1 140 17.9 14.0 128 West Yellowstone 6700 9.6 6.1 157 12.2 8.2 149 Whiskey Creek 6800 12.1 7.9 153 16.2 11.3 143 ----- ----- Basin Index (%) 134 130 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 9.9 12.8 77 8.9 11.8 75 Canyon 7870 8.3 -M * 10.2 -M * Evening Star 9200 14.2 15.2 93 16.3 16.6 98 Fisher Creek 9100 19.7 18.8 105 20.4 18.4 111 Monument Peak 8850 11.6 12.1 96 13.8 13.2 105 Northeast Entrance 7350 5.2 5.4 96 7.6 7.6 100 Parker Peak 9400 12.8 12.0 107 13.2 12.0 110 Sylvan Lake 8420 10.6 10.9 97 13.5 13.5 100 Thumb Divide 7980 12.1 8.0 151 11.5 9.5 121 Two Ocean Plateau 9240 17.9 16.8 107 14.5 15.4 94 White Mill 8700 13.9 14.2 98 13.6 13.6 100 Wolverine 7650 6.0 6.7 90 6.9 7.5 92 ----- ----- Basin Index (%) 101 101 WIND RIVER Burroughs Creek 8750 5.7 -M * 6.6 -M * Castle Creek 8400 3.6 3.9 92 4.2 5.2 81 Cold Springs 9630 4.9 4.2 117 6.1 5.6 109 Deer Park 9700 14.1 7.2 196 14.3 9.0 159 Hobbs Park 10100 9.7 7.1 137 9.0 6.7 134 Kirwin 9550 5.3 6.3 84 7.0 7.1 99 Little Warm 9370 5.8 5.6 104 6.6 7.4 89 South Pass 9040 11.0 7.0 157 10.8 8.2 132 St. Lawrence Alt 8620 4.3 -M * 6.1 -M * Togwotee Pass 9580 12.5 12.9 97 12.2 13.6 90 Townsend Creek 8700 6.8 4.5 151 7.7 6.2 124 ----- ----- Basin Index (%) 126 113 BIGHORN BASIN Bald Mtn. 9380 8.6 10.2 84 7.3 9.0 81 Bear Trap Meadow 8200 4.7 3.4 138 5.5 4.8 115 Bone Springs Div 9350 5.9 9.0 66 5.9 8.6 69 Grave Springs 8550 5.9 4.1 144 6.4 5.1 125 Kirwin 9550 5.3 6.3 84 7.0 7.1 99 Marquette 8760 3.8 3.8 100 4.5 5.4 83 Middle Powder 7760 6.7 5.2 129 5.9 5.6 105 Owl Creek 8975 4.3 3.0 143 5.0 3.6 139 Powder River Pass 9480 5.1 6.2 82 6.6 7.4 89 Shell Creek 9580 6.1 8.5 72 6.8 7.9 86 Timber Creek 7950 2.9 2.5 116 3.4 4.4 77 ----- ----- Basin Index (%) 95 93 SHOSHONE RIVER Blackwater 9780 11.6 13.4 87 11.4 12.6 90 Evening Star 9200 14.2 15.2 93 16.3 16.6 98 Marquette 8760 3.8 3.8 100 4.5 5.4 83 Sylvan Lake 8420 10.6 10.9 97 13.5 13.5 100 Sylvan Road 7120 5.8 7.0 83 8.3 10.6 78 Younts Peak 8350 8.9 8.2 109 8.0 8.2 98 ----- ----- Basin Index (%) 94 93 POWDER RIVER Bear Trap Meadow 8200 4.7 3.4 138 5.5 4.8 115 Cloud Peak Reservoir 9860 7.0 7.6 92 7.1 7.5 95 Grave Springs 8550 5.9 4.1 144 6.4 5.1 125 Hansen Sawmill 8360 3.9 3.8 103 4.2 4.8 88 Middle Powder 7760 6.7 5.2 129 5.9 5.6 105 Powder River Pass 9480 5.1 6.2 82 6.6 7.4 89 Soldier Park 8720 2.2 3.2 69 3.7 5.0 74 ----- ----- Basin Index (%) 106 98 TONGUE RIVER Big Goose 7990 4.6 4.0 115 5.4 5.6 96 Bone Springs Div 9350 5.9 9.0 66 5.9 8.6 69 Burgess Junction 7880 6.1 5.6 109 7.5 6.8 110 Dome Lake 8880 4.2 6.0 70 6.0 7.0 86 Little Goose 8870 5.0 4.8 104 6.0 6.4 94 Sucker Creek 8880 6.3 6.5 97 8.3 7.4 112 Tie Creek 6870 3.6 3.0 120 6.4 5.9 108 ----- ----- Basin Index (%) 92 95 BELLE FOURCHE Blind Park 6890 4.0 3.9 103 5.5 5.6 98 Cole Canyon 5910 3.6 2.8 129 4.8 5.0 96 North Rapid Creek 6130 3.9 3.8 103 4.6 4.6 100 ----- ----- Basin Index (%) 110 98 CHEYENNE RIVER BASIN Blind Park 6890 4.0 3.9 103 5.5 5.6 98 North Rapid Creek 6130 3.9 3.8 103 4.6 4.6 100 ----- ----- Basin Index (%) 103 99 UPPER N. PLATTE Arapaho Ridge 10976 14.7 12.0 122 14.7 12.4 119 Blackhall Mtn 9839 19.4 14.7 132 20.0 16.0 125 Cinnabar Park 9707 -M 11.6 * 12.6 13.3 95 Columbine 9167 16.1 12.4 130 16.0 13.0 123 Divide Peak 8730 13.9 10.0 139 16.0 12.2 131 Joe Wright 10158 13.3 10.1 132 16.1 14.0 115 Laprele Creek 8390 5.7 4.6 124 6.0 6.2 97 Med Bow 10512 19.3 -M * 18.0 -M * Never Summer 10323 14.3 10.4 138 10.2 9.6 106 North French Creek 10153 15.5 14.8 105 15.4 15.0 103 Old Battle 9860 21.6 15.8 137 23.2 18.8 123 Rawah 9069 8.9 6.2 144 10.1 9.2 110 Sage Creek Basin 7850 12.1 7.0 173 12.4 7.7 161 Sand Lake 10098 14.0 14.1 99 14.0 12.8 109 South Brush Creek 8495 8.4 6.2 135 7.9 7.8 101 Tower 10620 30.2 21.4 141 28.8 22.0 131 Webber Springs 9260 15.3 11.7 131 16.8 14.6 115 Whiskey Park 9020 21.8 14.2 154 20.8 16.5 126 Willow Creek Pass 9523 9.8 6.8 144 10.4 7.2 144 Zirkel 9338 16.2 15.0 108 18.7 17.0 110 ----- ----- Basin Index (%) 131 118 SWEETWATER Deer Park 9700 14.1 7.2 196 14.3 9.0 159 Larsen Creek 9000 6.0 4.6 130 8.4 6.8 124 South Pass 9040 11.0 7.0 157 10.8 8.2 132 ----- ----- Basin Index (%) 165 140 LOWER N. PLATTE Casper Mtn. 7920 7.0 6.3 111 7.2 7.5 96 Laprele Creek 8390 5.7 4.6 124 6.0 6.2 97 Reno Hill 8430 7.5 6.8 110 8.9 7.9 113 Windy Peak 7915 4.7 3.8 124 5.6 5.6 100 ----- ----- Basin Index (%) 116 102 LARAMIE RIVER Brooklyn Lake 10250 12.5 11.1 113 13.4 11.6 116 Cinnabar Park 9707 -M 11.6 * 12.6 13.3 95 Crow Creek 8335 2.8 4.4 64 5.0 6.0 83 Deadman Hill 10239 10.0 9.4 106 9.2 9.4 98 Rawah 9069 8.9 6.2 144 10.1 9.2 110 Roach 9740 10.3 8.8 117 11.9 10.5 113 Windy Peak 7915 4.7 3.8 124 5.6 5.6 100 ----- ----- Basin Index (%) 113 103 S. PLATTE Crow Creek 8335 2.8 4.4 64 5.0 6.0 83 ----- ----- Basin Index (%) 64 83 LITTLE SNAKE RIVER Battle Mountain 7498 10.4 6.2 168 13.9 8.6 162 Divide Peak 8730 13.9 10.0 139 16.0 12.2 131 Elk River 8739 16.2 9.3 174 15.1 10.6 142 Elkhead Divide 8800 18.2 -M * 18.4 -M * Little Snake River 8928 20.8 13.8 151 24.8 19.0 131 Old Battle 9860 21.6 15.8 137 23.2 18.8 123 Sage Creek Basin 7850 12.1 7.0 173 12.4 7.7 161 Sandstone RS 8152 13.8 7.0 197 15.3 10.2 150 Whiskey Park 9020 21.8 14.2 154 20.8 16.5 126 ----- ----- Basin Index (%) 157 137 UPPER GREEN RIVER Big Sandy Opening 9080 8.8 7.0 126 8.6 7.2 119 Blind Bull Sum 8650 12.6 12.6 100 9.1 10.7 85 East Rim Divide 7930 6.1 5.8 105 6.2 6.6 94 Elkhart Park G.S. 9400 7.1 6.8 104 6.5 7.2 90 Gros Ventre Summit 8750 7.2 7.2 100 6.8 7.0 97 Gunsight Pass 9820 7.4 7.2 103 7.2 7.9 91 Indian Creek 9425 15.6 12.0 130 13.2 10.8 122 Kendall R.S. 7740 6.5 6.6 98 7.0 7.8 90 Larsen Creek 9000 6.0 4.6 130 8.4 6.8 124 Loomis Park 8240 8.4 8.2 102 8.6 9.4 91 New Fork Lake 8340 6.3 6.0 105 -M 6.3 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 7.2 6.9 104 8.4 7.8 108 Spring Creek Divide 9000 13.8 13.0 106 14.5 12.6 115 Triple Peak 8500 13.5 11.6 116 13.6 13.6 100 ----- ----- Basin Index (%) 110 102 LOWER GREEN RIVER Blacks Fork Jct 8869 8.1 4.2 193 8.3 6.6 126 Buck Pasture 9632 11.2 -M * 12.7 -M * EF Blacks Fork GS 9360 9.3 5.0 186 7.1 5.9 120 Hams Fork 7840 8.6 5.6 154 8.3 6.2 134 Henrys Fork 10182 -M -M * 8.5 -M * Hewinta 9500 7.0 5.0 140 9.0 7.7 117 Hickerson Park 9122 5.7 3.4 168 6.5 5.6 116 Hole-in-Rock 9168 5.4 3.6 150 6.4 5.8 110 Indian Creek 9425 15.6 12.0 130 13.2 10.8 122 Kelley R.S. 8180 11.5 7.2 160 11.9 9.4 127 Spirit Lk 10235 11.2 6.0 187 10.9 8.7 125 Steel Creek Park 10158 11.2 7.2 156 11.1 8.7 128 ----- ----- Basin Index (%) 158 123 UPPER BEAR RIVER Bear River RS 8777 7.4 4.7 157 8.8 6.6 133 Bug Lake 7987 14.5 8.1 179 12.2 9.5 128 Burts Miller Ranch 8000 6.2 3.2 194 8.9 4.8 185 Chalk Creek #1 9171 17.0 10.9 156 17.4 12.4 140 Giveout 6930 7.4 4.6 161 8.6 6.6 130 Hayden Fork 9130 11.2 6.9 162 14.8 10.5 141 Kelley R.S. 8180 11.5 7.2 160 11.9 9.4 127 Lily Lake 9133 9.7 6.4 152 9.8 8.6 114 Monte Cristo 8932 20.7 12.6 164 19.8 13.5 147 Salt River Summit 7640 9.7 6.4 152 9.9 8.5 116 Spring Creek Divide 9000 13.8 13.0 106 14.5 12.6 115 Trial Lake 9992 19.6 10.2 192 19.9 11.9 167 ----- ----- Basin Index (%) 158 136 ----------------------------------------------------------------------------- -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.