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 THURSDAY: FEBRUARY 2 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.5 11.8 89 11.9 13.7 87 Blind Bull Sum 8650 13.9 15.2 91 10.1 11.8 86 Cottonwood Creek 7670 14.7 13.6 108 15.9 15.6 102 East Rim Divide 7930 7.5 7.0 107 7.2 7.5 96 Grand Targhee 9260 28.8 27.4 105 17.8 20.7 86 Granite Creek 6770 10.1 10.4 97 9.1 12.6 72 Grassy Lake 7265 18.4 20.5 90 22.1 23.2 95 Gros Ventre Summit 8750 7.4 8.0 92 7.4 7.8 95 Gunsight Pass 9820 8.4 8.6 98 8.3 8.9 93 Lewis Lake Divide 7850 21.1 19.5 108 23.2 21.6 107 Loomis Park 8240 9.5 9.9 96 9.7 10.6 92 Phillips Bench 8200 17.2 16.0 108 18.0 17.2 105 Salt River Summit 7640 11.0 7.7 143 10.9 9.8 111 Snake River Station 6920 11.6 11.4 102 13.8 15.2 91 Somsen Ranch 6800 11.4 8.4 136 13.0 11.0 118 Spring Creek Divide 9000 15.3 15.3 100 15.9 15.0 106 Thumb Divide 7980 12.7 9.8 130 12.2 11.6 105 Togwotee Pass 9580 14.1 14.7 96 13.7 15.9 86 Triple Peak 8500 14.6 14.8 99 14.9 16.0 93 Two Ocean Plateau 9240 19.0 19.1 99 15.4 16.4 94 Willow Creek 8080 21.5 17.0 126 21.1 21.0 100 Younts Peak 8350 10.2 9.5 107 9.0 9.6 94 ----- ----- Basin Index (%) 104 96 MADISON HEADWATERS IN WYOMING Black Bear 8170 26.2 23.0 114 26.1 23.4 112 Canyon 7870 9.0 -M * 11.1 -M * Madison Plateau 7750 18.1 14.0 129 18.8 15.4 122 West Yellowstone 6700 10.0 7.0 143 12.9 9.2 140 Whiskey Creek 6800 12.8 9.2 139 16.4 12.3 133 ----- ----- Basin Index (%) 126 123 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 10.8 14.7 73 9.9 13.0 76 Canyon 7870 9.0 -M * 11.1 -M * Evening Star 9200 15.6 17.6 89 18.1 19.4 93 Fisher Creek 9100 21.3 21.7 98 22.3 20.5 109 Monument Peak 8850 13.0 13.5 96 15.4 14.4 107 Northeast Entrance 7350 6.1 6.6 92 8.5 8.4 101 Parker Peak 9400 14.7 14.0 105 15.0 13.4 112 Sylvan Lake 8420 12.2 12.6 97 14.5 15.2 95 Thumb Divide 7980 12.7 9.8 130 12.2 11.6 105 Two Ocean Plateau 9240 19.0 19.1 99 15.4 16.4 94 White Mill 8700 15.1 16.0 94 14.8 15.4 96 Wolverine 7650 7.6 8.2 93 8.3 8.4 99 ----- ----- Basin Index (%) 96 99 WIND RIVER Burroughs Creek 8750 7.0 -M * 7.5 -M * Castle Creek 8400 4.4 4.6 96 5.0 6.0 83 Cold Springs 9630 5.6 4.8 117 6.8 6.0 113 Deer Park 9700 15.0 8.0 188 15.1 10.2 148 Hobbs Park 10100 10.2 7.9 129 9.5 7.2 132 Kirwin 9550 6.0 7.0 86 7.7 7.8 99 Little Warm 9370 6.6 6.5 102 7.5 7.8 96 South Pass 9040 11.7 8.2 143 11.4 9.2 124 St. Lawrence Alt 8620 4.9 -M * 6.5 -M * Togwotee Pass 9580 14.1 14.7 96 13.7 15.9 86 Townsend Creek 8700 7.5 5.3 142 8.4 6.6 127 ----- ----- Basin Index (%) 121 111 BIGHORN BASIN Bald Mtn. 9380 11.8 11.2 105 10.0 9.8 102 Bear Trap Meadow 8200 5.8 3.8 153 6.3 5.2 121 Bone Springs Div 9350 8.1 10.3 79 7.4 9.2 80 Grave Springs 8550 6.8 4.7 145 7.3 5.6 130 Kirwin 9550 6.0 7.0 86 7.7 7.8 99 Marquette 8760 4.9 4.2 117 5.3 5.8 91 Middle Powder 7760 7.6 6.1 125 6.7 6.0 112 Owl Creek 8975 5.0 3.3 152 5.6 3.9 144 Powder River Pass 9480 6.6 7.0 94 8.3 8.2 101 Shell Creek 9580 7.9 9.2 86 8.5 8.6 99 Timber Creek 7950 3.7 2.8 132 4.2 4.8 88 ----- ----- Basin Index (%) 107 103 SHOSHONE RIVER Blackwater 9780 12.6 14.8 85 12.6 14.1 89 Evening Star 9200 15.6 17.6 89 18.1 19.4 93 Marquette 8760 4.9 4.2 117 5.3 5.8 91 Sylvan Lake 8420 12.2 12.6 97 14.5 15.2 95 Sylvan Road 7120 6.8 8.2 83 9.7 11.9 82 Younts Peak 8350 10.2 9.5 107 9.0 9.6 94 ----- ----- Basin Index (%) 93 91 POWDER RIVER Bear Trap Meadow 8200 5.8 3.8 153 6.3 5.2 121 Cloud Peak Reservoir 9860 8.8 8.8 100 8.9 8.2 109 Grave Springs 8550 6.8 4.7 145 7.3 5.6 130 Hansen Sawmill 8360 4.8 4.2 114 5.2 5.3 98 Middle Powder 7760 7.6 6.1 125 6.7 6.0 112 Powder River Pass 9480 6.6 7.0 94 8.3 8.2 101 Soldier Park 8720 3.3 3.7 89 4.8 5.6 86 ----- ----- Basin Index (%) 114 108 TONGUE RIVER Big Goose 7990 6.4 4.8 133 7.0 6.0 117 Bone Springs Div 9350 8.1 10.3 79 7.4 9.2 80 Burgess Junction 7880 8.1 6.6 123 9.6 7.6 126 Dome Lake 8880 5.7 6.7 85 7.6 7.8 97 Little Goose 8870 6.9 5.9 117 7.8 7.2 108 Sucker Creek 8880 8.7 7.6 114 10.9 8.4 130 Tie Creek 6870 6.2 3.4 182 9.0 6.8 132 ----- ----- Basin Index (%) 111 112 BELLE FOURCHE Blind Park 6890 5.3 4.8 110 6.8 6.6 103 Cole Canyon 5910 4.6 3.2 144 5.9 5.4 109 North Rapid Creek 6130 4.8 4.7 102 5.5 5.2 106 ----- ----- Basin Index (%) 116 106 CHEYENNE RIVER BASIN Blind Park 6890 5.3 4.8 110 6.8 6.6 103 North Rapid Creek 6130 4.8 4.7 102 5.5 5.2 106 ----- ----- Basin Index (%) 106 104 UPPER N. PLATTE Arapaho Ridge 10976 16.8 14.0 120 16.7 13.9 120 Blackhall Mtn 9839 23.7 18.1 131 23.9 19.0 126 Cinnabar Park 9707 -M 13.1 * 15.6 15.8 99 Columbine 9167 19.0 14.4 132 18.0 15.2 118 Divide Peak 8730 16.9 12.3 137 18.6 13.9 134 Joe Wright 10158 16.3 11.8 138 18.6 15.4 121 Laprele Creek 8390 7.7 5.4 143 8.0 7.0 114 Med Bow 10512 25.0 -M * 22.8 -M * Never Summer 10323 17.3 11.6 149 12.2 10.8 113 North French Creek 10153 19.6 16.8 117 19.6 16.8 117 Old Battle 9860 25.2 19.0 133 25.6 22.2 115 Rawah 9069 10.5 6.8 154 11.8 10.0 118 Sage Creek Basin 7850 14.8 9.3 159 14.2 8.8 161 Sand Lake 10098 17.6 16.4 107 17.6 15.0 117 South Brush Creek 8495 10.6 7.2 147 10.0 8.6 116 Tower 10620 35.9 26.2 137 -M 25.6 * Webber Springs 9260 17.8 13.4 133 19.4 16.4 118 Whiskey Park 9020 26.1 16.6 157 24.3 18.2 134 Willow Creek Pass 9523 11.4 7.9 144 11.7 8.4 139 Zirkel 9338 20.0 16.8 119 22.4 19.4 115 ----- ----- Basin Index (%) 134 121 SWEETWATER Deer Park 9700 15.0 8.0 188 15.1 10.2 148 Larsen Creek 9000 7.0 5.0 140 9.2 7.8 118 South Pass 9040 11.7 8.2 143 11.4 9.2 124 ----- ----- Basin Index (%) 159 131 LOWER N. PLATTE Casper Mtn. 7920 9.1 7.6 120 9.1 8.6 106 Laprele Creek 8390 7.7 5.4 143 8.0 7.0 114 Reno Hill 8430 9.8 8.2 120 11.2 8.6 130 Windy Peak 7915 6.6 4.4 150 7.6 6.4 119 ----- ----- Basin Index (%) 130 117 LARAMIE RIVER Brooklyn Lake 10250 15.6 12.6 124 16.3 13.4 122 Cinnabar Park 9707 -M 13.1 * 15.6 15.8 99 Crow Creek 8335 4.0 5.2 77 6.0 6.5 92 Deadman Hill 10239 11.9 11.0 108 11.1 10.7 104 Rawah 9069 10.5 6.8 154 11.8 10.0 118 Roach 9740 12.6 9.6 131 14.1 11.6 122 Windy Peak 7915 6.6 4.4 150 7.6 6.4 119 ----- ----- Basin Index (%) 123 111 S. PLATTE Crow Creek 8335 4.0 5.2 77 6.0 6.5 92 ----- ----- Basin Index (%) 77 92 LITTLE SNAKE RIVER Battle Mountain 7498 12.4 7.5 165 16.1 10.2 158 Divide Peak 8730 16.9 12.3 137 18.6 13.9 134 Elk River 8739 18.6 11.3 165 17.5 12.0 146 Elkhead Divide 8800 20.9 -M * 21.2 -M * Little Snake River 8928 24.6 16.4 150 28.6 22.5 127 Old Battle 9860 25.2 19.0 133 25.6 22.2 115 Sage Creek Basin 7850 14.8 9.3 159 14.2 8.8 161 Sandstone RS 8152 16.1 8.2 196 17.5 11.4 154 Whiskey Park 9020 26.1 16.6 157 24.3 18.2 134 ----- ----- Basin Index (%) 154 136 UPPER GREEN RIVER Big Sandy Opening 9080 9.4 8.1 116 9.3 8.0 116 Blind Bull Sum 8650 13.9 15.2 91 10.1 11.8 86 East Rim Divide 7930 7.5 7.0 107 7.2 7.5 96 Elkhart Park G.S. 9400 7.9 7.8 101 7.1 8.0 89 Gros Ventre Summit 8750 7.4 8.0 92 7.4 7.8 95 Gunsight Pass 9820 8.4 8.6 98 8.3 8.9 93 Indian Creek 9425 17.1 13.9 123 14.6 12.8 114 Kendall R.S. 7740 7.3 7.7 95 7.7 8.8 88 Larsen Creek 9000 7.0 5.0 140 9.2 7.8 118 Loomis Park 8240 9.5 9.9 96 9.7 10.6 92 New Fork Lake 8340 7.0 6.8 103 -M 6.8 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 8.3 8.2 101 9.5 8.8 108 Spring Creek Divide 9000 15.3 15.3 100 15.9 15.0 106 Triple Peak 8500 14.6 14.8 99 14.9 16.0 93 ----- ----- Basin Index (%) 103 99 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 5.0 172 8.8 7.7 114 Buck Pasture 9632 11.9 -M * 13.8 -M * EF Blacks Fork GS 9360 9.3 6.4 145 7.2 6.8 106 Hams Fork 7840 9.5 7.0 136 9.1 7.0 130 Henrys Fork 10182 -M -M * 9.4 -M * Hewinta 9500 7.8 5.5 142 9.8 8.9 110 Hickerson Park 9122 6.3 4.2 150 7.1 6.4 111 Hole-in-Rock 9168 5.7 4.2 136 6.8 6.4 106 Indian Creek 9425 17.1 13.9 123 14.6 12.8 114 Kelley R.S. 8180 12.4 9.2 135 13.1 11.0 119 Spirit Lk 10235 12.0 6.5 185 11.8 10.5 112 Steel Creek Park 10158 12.3 8.8 140 12.2 9.7 126 ----- ----- Basin Index (%) 143 115 UPPER BEAR RIVER Bear River RS 8777 8.0 5.4 148 9.7 7.4 131 Bug Lake 7987 16.6 10.5 158 13.8 11.7 118 Burts Miller Ranch 8000 6.0 4.0 150 9.6 5.1 188 Chalk Creek #1 9171 18.4 12.4 148 18.8 15.2 124 Giveout 6930 7.8 6.0 130 9.2 7.6 121 Hayden Fork 9130 12.0 8.4 143 16.4 12.6 130 Kelley R.S. 8180 12.4 9.2 135 13.1 11.0 119 Lily Lake 9133 11.0 7.4 149 10.9 9.7 112 Monte Cristo 8932 22.9 14.6 157 21.5 16.0 134 Salt River Summit 7640 11.0 7.7 143 10.9 9.8 111 Spring Creek Divide 9000 15.3 15.3 100 15.9 15.0 106 Trial Lake 9992 21.1 12.8 165 21.4 14.0 153 ----- ----- Basin Index (%) 143 127 ----------------------------------------------------------------------------- -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.