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 TUESDAY: JANUARY 17 , 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 12.2 90 Blind Bull Sum 8650 12.6 12.6 100 9.1 10.6 86 Cottonwood Creek 7670 13.0 10.8 120 14.0 13.0 108 East Rim Divide 7930 6.2 5.6 111 6.2 6.6 94 Grand Targhee 9260 25.0 23.0 109 15.6 18.0 87 Granite Creek 6770 9.2 8.6 107 8.4 11.2 75 Grassy Lake 7265 16.6 16.2 102 20.1 19.4 104 Gros Ventre Summit 8750 7.3 7.2 101 6.7 6.9 97 Gunsight Pass 9820 7.4 7.2 103 7.3 7.7 95 Lewis Lake Divide 7850 20.1 15.9 126 22.1 19.2 115 Loomis Park 8240 8.4 8.1 104 8.6 9.4 91 Phillips Bench 8200 15.3 13.2 116 16.2 14.9 109 Salt River Summit 7640 9.8 6.4 153 9.9 8.5 116 Snake River Station 6920 10.9 9.0 121 12.9 13.5 96 Somsen Ranch 6800 9.7 6.8 143 11.2 9.4 119 Spring Creek Divide 9000 13.8 12.6 110 14.5 12.6 115 Thumb Divide 7980 12.2 7.8 156 11.6 9.5 122 Togwotee Pass 9580 12.4 12.9 96 12.1 13.4 90 Triple Peak 8500 13.6 11.6 117 13.7 13.2 104 Two Ocean Plateau 9240 17.9 16.6 108 14.5 15.3 95 Willow Creek 8080 19.0 14.6 130 19.0 17.6 108 Younts Peak 8350 8.8 8.2 107 7.9 8.2 96 ----- ----- Basin Index (%) 114 101 MADISON HEADWATERS IN WYOMING Black Bear 8170 24.6 20.8 118 24.6 21.0 117 Canyon 7870 8.4 -M * 10.2 -M * Madison Plateau 7750 17.0 12.0 142 17.9 13.7 131 West Yellowstone 6700 9.6 6.0 160 12.2 8.2 149 Whiskey Creek 6800 12.1 8.0 151 15.6 11.2 139 ----- ----- Basin Index (%) 135 130 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 9.9 12.8 77 8.9 11.8 75 Canyon 7870 8.4 -M * 10.2 -M * Evening Star 9200 14.2 15.0 95 16.4 16.5 99 Fisher Creek 9100 19.7 18.4 107 20.5 18.4 111 Monument Peak 8850 11.5 11.7 98 13.7 12.8 107 Northeast Entrance 7350 5.2 5.2 100 7.6 7.4 103 Parker Peak 9400 12.9 11.8 109 13.3 11.8 113 Sylvan Lake 8420 10.6 10.8 98 13.4 13.3 101 Thumb Divide 7980 12.2 7.8 156 11.6 9.5 122 Two Ocean Plateau 9240 17.9 16.6 108 14.5 15.3 95 White Mill 8700 13.9 14.0 99 13.6 13.4 101 Wolverine 7650 6.0 6.6 91 6.8 7.5 91 ----- ----- Basin Index (%) 103 102 WIND RIVER Burroughs Creek 8750 5.7 -M * 6.6 -M * Castle Creek 8400 3.6 3.9 92 4.2 5.1 82 Cold Springs 9630 4.9 4.2 117 6.1 5.5 111 Deer Park 9700 14.1 7.0 201 14.2 8.9 160 Hobbs Park 10100 9.7 7.1 137 8.9 6.7 133 Kirwin 9550 5.2 6.2 84 7.0 7.1 99 Little Warm 9370 5.8 5.6 104 6.7 7.3 92 South Pass 9040 11.0 6.8 162 10.8 8.2 132 St. Lawrence Alt 8620 4.2 -M * 6.0 -M * Togwotee Pass 9580 12.4 12.9 96 12.1 13.4 90 Townsend Creek 8700 6.7 4.4 152 7.6 6.2 123 ----- ----- Basin Index (%) 126 113 BIGHORN BASIN Bald Mtn. 9380 8.6 10.2 84 7.3 8.9 82 Bear Trap Meadow 8200 4.6 3.4 135 5.4 4.8 112 Bone Springs Div 9350 5.8 9.0 64 5.8 8.4 69 Grave Springs 8550 5.9 4.0 148 6.3 5.0 126 Kirwin 9550 5.2 6.2 84 7.0 7.1 99 Marquette 8760 3.8 3.8 100 4.5 5.4 83 Middle Powder 7760 6.6 5.1 129 5.9 5.5 107 Owl Creek 8975 4.3 3.0 143 4.9 3.5 140 Powder River Pass 9480 5.0 6.2 81 6.5 7.4 88 Shell Creek 9580 6.0 8.4 71 6.8 7.8 87 Timber Creek 7950 2.8 2.6 108 3.2 4.4 73 ----- ----- Basin Index (%) 95 93 SHOSHONE RIVER Blackwater 9780 11.7 13.4 87 11.5 12.6 91 Evening Star 9200 14.2 15.0 95 16.4 16.5 99 Marquette 8760 3.8 3.8 100 4.5 5.4 83 Sylvan Lake 8420 10.6 10.8 98 13.4 13.3 101 Sylvan Road 7120 -M 6.9 * -M 10.6 * Younts Peak 8350 8.8 8.2 107 7.9 8.2 96 ----- ----- Basin Index (%) 96 96 POWDER RIVER Bear Trap Meadow 8200 4.6 3.4 135 5.4 4.8 112 Cloud Peak Reservoir 9860 6.9 7.3 95 6.9 7.4 93 Grave Springs 8550 5.9 4.0 148 6.3 5.0 126 Hansen Sawmill 8360 3.7 3.8 97 4.1 4.8 85 Middle Powder 7760 6.6 5.1 129 5.9 5.5 107 Powder River Pass 9480 5.0 6.2 81 6.5 7.4 88 Soldier Park 8720 2.0 3.2 62 3.6 5.0 72 ----- ----- Basin Index (%) 105 97 TONGUE RIVER Big Goose 7990 4.5 4.0 112 5.3 5.5 96 Bone Springs Div 9350 5.8 9.0 64 5.8 8.4 69 Burgess Junction 7880 5.9 5.4 109 7.3 6.7 109 Dome Lake 8880 4.0 5.9 68 5.8 6.8 85 Little Goose 8870 4.9 4.8 102 5.9 6.4 92 Sucker Creek 8880 6.2 6.4 97 8.1 7.4 109 Tie Creek 6870 3.5 2.8 125 6.2 5.9 105 ----- ----- Basin Index (%) 91 94 BELLE FOURCHE Blind Park 6890 4.0 4.0 100 5.5 5.6 98 Cole Canyon 5910 3.6 2.8 129 4.8 5.0 96 North Rapid Creek 6130 3.9 3.7 105 4.6 4.4 105 ----- ----- Basin Index (%) 110 99 CHEYENNE RIVER BASIN Blind Park 6890 4.0 4.0 100 5.5 5.6 98 North Rapid Creek 6130 3.9 3.7 105 4.6 4.4 105 ----- ----- Basin Index (%) 103 101 UPPER N. PLATTE Arapaho Ridge 10976 14.3 11.6 123 14.3 12.4 115 Blackhall Mtn 9839 19.1 14.2 135 19.6 15.9 123 Cinnabar Park 9707 -M 11.6 * 12.0 13.3 90 Columbine 9167 15.6 12.1 129 15.5 13.0 119 Divide Peak 8730 13.5 9.8 138 15.6 12.1 129 Joe Wright 10158 13.2 10.0 132 15.9 13.4 119 Laprele Creek 8390 5.6 4.6 122 5.8 6.2 94 Med Bow 10512 19.1 -M * 18.0 -M * Never Summer 10323 14.3 10.3 139 10.1 9.6 105 North French Creek 10153 15.3 14.7 104 15.3 14.9 103 Old Battle 9860 21.2 15.8 134 22.9 18.6 123 Rawah 9069 8.7 6.2 140 10.0 9.2 109 Sage Creek Basin 7850 11.8 6.8 174 12.3 7.7 160 Sand Lake 10098 13.7 14.0 98 13.7 12.6 109 South Brush Creek 8495 8.4 6.2 135 7.9 7.8 101 Tower 10620 29.4 21.0 140 28.2 21.6 131 Webber Springs 9260 14.9 11.2 133 16.4 14.3 115 Whiskey Park 9020 21.6 13.4 161 20.5 16.4 125 Willow Creek Pass 9523 9.5 6.8 140 10.1 7.1 142 Zirkel 9338 15.6 15.0 104 18.2 17.0 107 ----- ----- Basin Index (%) 130 117 SWEETWATER Deer Park 9700 14.1 7.0 201 14.2 8.9 160 Larsen Creek 9000 6.0 4.0 150 8.4 6.7 125 South Pass 9040 11.0 6.8 162 10.8 8.2 132 ----- ----- Basin Index (%) 175 140 LOWER N. PLATTE Casper Mtn. 7920 6.8 6.2 110 7.0 7.4 95 Laprele Creek 8390 5.6 4.6 122 5.8 6.2 94 Reno Hill 8430 7.4 6.7 110 8.8 7.7 114 Windy Peak 7915 4.6 3.8 121 5.6 5.5 102 ----- ----- Basin Index (%) 115 101 LARAMIE RIVER Brooklyn Lake 10250 12.1 11.1 109 13.0 11.3 115 Cinnabar Park 9707 -M 11.6 * 12.0 13.3 90 Crow Creek 8335 2.5 4.4 57 4.7 5.9 80 Deadman Hill 10239 9.8 9.2 107 9.1 9.3 98 Rawah 9069 8.7 6.2 140 10.0 9.2 109 Roach 9740 10.1 8.7 116 11.7 10.5 111 Windy Peak 7915 4.6 3.8 121 5.6 5.5 102 ----- ----- Basin Index (%) 110 102 S. PLATTE Crow Creek 8335 2.5 4.4 57 4.7 5.9 80 ----- ----- Basin Index (%) 57 80 LITTLE SNAKE RIVER Battle Mountain 7498 10.3 6.2 166 13.9 8.4 165 Divide Peak 8730 13.5 9.8 138 15.6 12.1 129 Elk River 8739 16.0 9.0 178 15.0 10.4 144 Elkhead Divide 8800 18.0 -M * 18.2 -M * Little Snake River 8928 20.6 13.4 154 24.6 18.8 131 Old Battle 9860 21.2 15.8 134 22.9 18.6 123 Sage Creek Basin 7850 11.8 6.8 174 12.3 7.7 160 Sandstone RS 8152 13.8 7.0 197 15.3 9.9 155 Whiskey Park 9020 21.6 13.4 161 20.5 16.4 125 ----- ----- Basin Index (%) 158 137 UPPER GREEN RIVER Big Sandy Opening 9080 8.8 7.0 126 8.6 7.1 121 Blind Bull Sum 8650 12.6 12.6 100 9.1 10.6 86 East Rim Divide 7930 6.2 5.6 111 6.2 6.6 94 Elkhart Park G.S. 9400 7.2 6.6 109 6.6 6.9 96 Gros Ventre Summit 8750 7.3 7.2 101 6.7 6.9 97 Gunsight Pass 9820 7.4 7.2 103 7.3 7.7 95 Indian Creek 9425 15.6 11.8 132 13.2 10.6 125 Kendall R.S. 7740 6.5 6.6 98 7.0 7.6 92 Larsen Creek 9000 6.0 4.0 150 8.4 6.7 125 Loomis Park 8240 8.4 8.1 104 8.6 9.4 91 New Fork Lake 8340 6.3 5.7 111 -M 6.2 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 7.3 6.6 111 8.5 7.6 112 Spring Creek Divide 9000 13.8 12.6 110 14.5 12.6 115 Triple Peak 8500 13.6 11.6 117 13.7 13.2 104 ----- ----- Basin Index (%) 112 104 LOWER GREEN RIVER Blacks Fork Jct 8869 8.0 3.8 211 8.2 6.6 124 Buck Pasture 9632 11.2 -M * 12.7 -M * EF Blacks Fork GS 9360 9.3 4.4 211 7.1 5.7 125 Hams Fork 7840 8.6 5.6 154 8.3 6.0 138 Henrys Fork 10182 -M -M * 8.4 -M * Hewinta 9500 6.8 4.8 142 8.9 7.6 117 Hickerson Park 9122 5.5 3.4 162 6.3 5.6 112 Hole-in-Rock 9168 5.2 3.6 144 6.2 5.6 111 Indian Creek 9425 15.6 11.8 132 13.2 10.6 125 Kelley R.S. 8180 11.4 7.2 158 11.8 9.3 127 Spirit Lk 10235 11.0 5.9 186 10.7 8.7 123 Steel Creek Park 10158 11.2 7.0 160 11.1 8.7 128 ----- ----- Basin Index (%) 161 123 UPPER BEAR RIVER Bear River RS 8777 7.4 4.2 176 8.8 6.6 133 Bug Lake 7987 14.4 8.0 180 12.1 9.5 127 Burts Miller Ranch 8000 6.2 3.2 194 8.9 4.6 193 Chalk Creek #1 9171 17.0 10.9 156 17.4 12.4 140 Giveout 6930 7.4 4.5 164 8.6 6.6 130 Hayden Fork 9130 11.2 6.8 165 14.8 10.5 141 Kelley R.S. 8180 11.4 7.2 158 11.8 9.3 127 Lily Lake 9133 9.6 6.4 150 9.7 8.5 114 Monte Cristo 8932 20.6 12.6 163 19.7 13.2 149 Salt River Summit 7640 9.8 6.4 153 9.9 8.5 116 Spring Creek Divide 9000 13.8 12.6 110 14.5 12.6 115 Trial Lake 9992 19.5 10.2 191 19.8 11.6 171 ----- ----- Basin Index (%) 159 137 ----------------------------------------------------------------------------- -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.