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 MONDAY: MARCH 27 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.0 16.2 111 19.3 19.3 100 Blind Bull Sum 8650 23.9 23.3 103 16.7 17.4 96 Cottonwood Creek 7670 24.2 20.8 116 -M 24.0 * East Rim Divide 7930 11.8 10.5 112 11.2 10.6 106 Grand Targhee 9260 43.2 39.2 110 22.6 28.8 78 Granite Creek 6770 -M 15.4 * -M 17.2 * Grassy Lake 7265 33.7 31.1 108 36.8 32.8 112 Gros Ventre Summit 8750 11.5 12.0 96 10.5 11.6 91 Gunsight Pass 9820 13.3 12.4 107 12.4 13.1 95 Lewis Lake Divide 7850 34.8 29.4 118 30.7 31.2 98 Loomis Park 8240 15.8 15.0 105 15.9 16.2 98 Phillips Bench 8200 28.9 25.2 115 25.9 25.8 100 Salt River Summit 7640 18.5 12.9 143 17.6 14.8 119 Snake River Station 6920 19.4 16.6 117 21.8 20.8 105 Somsen Ranch 6800 19.5 11.9 164 20.5 15.2 135 Spring Creek Divide 9000 25.5 23.7 108 18.7 22.6 83 Thumb Divide 7980 19.7 15.4 128 18.1 16.6 109 Togwotee Pass 9580 21.7 22.7 96 19.8 23.4 85 Triple Peak 8500 23.2 22.2 105 23.5 24.4 96 Two Ocean Plateau 9240 30.0 27.4 109 20.9 24.8 84 Willow Creek 8080 35.0 28.4 123 33.7 30.8 109 Younts Peak 8350 15.8 13.8 114 12.7 13.8 92 ----- ----- Basin Index (%) 113 99 MADISON HEADWATERS IN WYOMING Black Bear 8170 43.6 35.9 121 40.1 34.3 117 Canyon 7870 14.1 -M * 16.4 -M * Madison Plateau 7750 29.0 21.2 137 27.4 22.6 121 West Yellowstone 6700 16.2 10.2 159 18.8 13.2 142 Whiskey Creek 6800 20.7 14.4 144 24.7 18.3 135 ----- ----- Basin Index (%) 134 126 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 18.2 20.8 88 16.8 19.0 88 Canyon 7870 14.1 -M * 16.4 -M * Evening Star 9200 25.3 24.1 105 27.1 26.6 102 Fisher Creek 9100 32.9 30.8 107 33.3 30.8 108 Monument Peak 8850 21.2 19.3 110 23.6 19.9 119 Northeast Entrance 7350 10.0 9.5 105 12.1 12.4 98 Parker Peak 9400 23.0 19.9 116 22.3 19.1 117 Sylvan Lake 8420 19.9 18.6 107 22.1 21.2 104 Thumb Divide 7980 19.7 15.4 128 18.1 16.6 109 Two Ocean Plateau 9240 30.0 27.4 109 20.9 24.8 84 White Mill 8700 23.7 22.8 104 22.3 21.8 102 Wolverine 7650 13.2 11.0 120 12.5 11.7 107 ----- ----- Basin Index (%) 108 103 WIND RIVER Burroughs Creek 8750 10.6 -M * 10.4 -M * Castle Creek 8400 6.2 6.8 91 6.8 8.0 85 Cold Springs 9630 7.6 6.9 110 9.0 8.2 110 Deer Park 9700 22.6 13.7 165 22.8 16.4 139 Hobbs Park 10100 14.6 13.0 112 13.6 11.4 119 Kirwin 9550 9.8 10.0 98 11.8 10.7 110 Little Warm 9370 10.1 9.9 102 11.4 11.3 101 South Pass 9040 18.2 13.8 132 17.5 14.2 123 St. Lawrence Alt 8620 7.0 -M * 9.1 -M * Togwotee Pass 9580 21.7 22.7 96 19.8 23.4 85 Townsend Creek 8700 10.7 8.2 130 11.7 9.7 121 ----- ----- Basin Index (%) 116 110 BIGHORN BASIN Bald Mtn. 9380 17.6 17.0 104 14.4 15.0 96 Bear Trap Meadow 8200 8.9 6.0 148 8.9 7.4 120 Bone Springs Div 9350 14.3 15.2 94 11.5 14.1 82 Grave Springs 8550 9.5 7.8 122 9.9 8.7 114 Kirwin 9550 9.8 10.0 98 11.8 10.7 110 Marquette 8760 8.2 6.6 124 8.8 8.1 109 Middle Powder 7760 11.0 9.8 112 9.2 9.1 101 Owl Creek 8975 7.3 5.1 143 7.7 5.4 143 Powder River Pass 9480 10.8 10.4 104 12.9 11.6 111 Shell Creek 9580 13.3 14.2 94 13.5 12.9 105 Timber Creek 7950 6.0 4.1 146 6.6 6.9 96 ----- ----- Basin Index (%) 110 105 SHOSHONE RIVER Blackwater 9780 20.0 21.0 95 20.0 20.6 97 Evening Star 9200 25.3 24.1 105 27.1 26.6 102 Marquette 8760 8.2 6.6 124 8.8 8.1 109 Sylvan Lake 8420 19.9 18.6 107 22.1 21.2 104 Sylvan Road 7120 10.9 11.2 97 14.3 15.2 94 Younts Peak 8350 15.8 13.8 114 12.7 13.8 92 ----- ----- Basin Index (%) 105 100 POWDER RIVER Bear Trap Meadow 8200 8.9 6.0 148 8.9 7.4 120 Cloud Peak Reservoir 9860 14.0 13.6 103 13.5 12.0 112 Grave Springs 8550 9.5 7.8 122 9.9 8.7 114 Hansen Sawmill 8360 8.1 6.0 135 8.4 7.8 108 Middle Powder 7760 11.0 9.8 112 9.2 9.1 101 Powder River Pass 9480 10.8 10.4 104 12.9 11.6 111 Soldier Park 8720 8.3 6.4 130 7.8 8.2 95 ----- ----- Basin Index (%) 118 109 TONGUE RIVER Big Goose 7990 9.5 7.4 128 10.1 9.0 112 Bone Springs Div 9350 14.3 15.2 94 11.5 14.1 82 Burgess Junction 7880 11.8 9.8 120 13.2 10.6 125 Dome Lake 8880 10.7 10.6 101 11.0 11.4 96 Little Goose 8870 10.6 8.8 120 11.3 10.8 105 Sucker Creek 8880 13.2 11.1 119 15.6 12.4 126 Tie Creek 6870 8.9 4.6 193 12.2 9.5 128 ----- ----- Basin Index (%) 117 109 BELLE FOURCHE Blind Park 6890 9.0 6.8 132 10.5 10.0 105 Cole Canyon 5910 8.3 5.3 157 9.4 8.0 118 North Rapid Creek 6130 7.7 6.6 117 8.3 8.3 100 ----- ----- Basin Index (%) 134 107 CHEYENNE RIVER BASIN Blind Park 6890 9.0 6.8 132 10.5 10.0 105 North Rapid Creek 6130 7.7 6.6 117 8.3 8.3 100 ----- ----- Basin Index (%) 125 103 UPPER N. PLATTE Arapaho Ridge 10976 24.7 20.3 122 23.5 20.4 115 Blackhall Mtn 9839 37.0 28.6 129 35.8 27.6 130 Cinnabar Park 9707 -M 19.4 * 22.3 22.0 101 Columbine 9167 28.1 21.5 131 24.7 22.4 110 Divide Peak 8730 27.7 18.0 154 27.7 20.4 136 Joe Wright 10158 24.2 19.2 126 25.5 24.2 105 Laprele Creek 8390 11.5 9.1 126 11.8 10.8 109 Med Bow 10512 38.3 -M * 31.1 -M * Never Summer 10323 24.8 18.9 131 17.5 16.0 109 North French Creek 10153 29.3 26.2 112 28.2 24.3 116 Old Battle 9860 40.1 28.2 142 30.9 31.1 99 Rawah 9069 14.8 10.2 145 16.3 14.2 115 Sage Creek Basin 7850 25.1 12.3 204 20.2 12.0 168 Sand Lake 10098 27.2 24.8 110 25.8 22.8 113 South Brush Creek 8495 15.3 11.4 134 14.0 12.6 111 Tower 10620 49.5 40.2 123 -M 37.2 * Webber Springs 9260 29.3 20.8 141 30.7 23.8 129 Whiskey Park 9020 38.4 24.9 154 34.1 25.8 132 Willow Creek Pass 9523 17.3 12.2 142 16.6 12.8 130 Zirkel 9338 31.9 27.0 118 33.1 29.2 113 ----- ----- Basin Index (%) 133 118 SWEETWATER Deer Park 9700 22.6 13.7 165 22.8 16.4 139 Larsen Creek 9000 11.2 10.6 106 13.8 12.4 111 South Pass 9040 18.2 13.8 132 17.5 14.2 123 ----- ----- Basin Index (%) 136 126 LOWER N. PLATTE Casper Mtn. 7920 12.8 12.4 103 12.5 12.6 99 Laprele Creek 8390 11.5 9.1 126 11.8 10.8 109 Reno Hill 8430 14.0 12.8 109 15.2 12.7 120 Windy Peak 7915 10.4 7.8 133 11.0 9.1 121 ----- ----- Basin Index (%) 116 112 LARAMIE RIVER Brooklyn Lake 10250 24.2 20.0 121 24.0 20.3 118 Cinnabar Park 9707 -M 19.4 * 22.3 22.0 101 Crow Creek 8335 5.2 5.9 88 8.3 9.9 84 Deadman Hill 10239 18.6 15.4 121 17.2 16.2 106 Rawah 9069 14.8 10.2 145 16.3 14.2 115 Roach 9740 17.9 14.4 124 19.8 17.2 115 Windy Peak 7915 10.4 7.8 133 11.0 9.1 121 ----- ----- Basin Index (%) 124 109 S. PLATTE Crow Creek 8335 5.2 5.9 88 8.3 9.9 84 ----- ----- Basin Index (%) 88 84 LITTLE SNAKE RIVER Battle Mountain 7498 17.9 11.0 163 21.6 14.0 154 Divide Peak 8730 27.7 18.0 154 27.7 20.4 136 Elk River 8739 28.6 17.4 164 25.4 17.6 144 Elkhead Divide 8800 32.0 -M * -M -M * Little Snake River 8928 38.2 24.9 153 37.2 30.1 124 Old Battle 9860 40.1 28.2 142 30.9 31.1 99 Sage Creek Basin 7850 25.1 12.3 204 20.2 12.0 168 Sandstone RS 8152 -M 12.2 * 24.5 16.7 147 Whiskey Park 9020 38.4 24.9 154 34.1 25.8 132 ----- ----- Basin Index (%) 158 132 UPPER GREEN RIVER Big Sandy Opening 9080 14.3 12.6 113 14.5 12.0 121 Blind Bull Sum 8650 23.9 23.3 103 16.7 17.4 96 East Rim Divide 7930 11.8 10.5 112 11.2 10.6 106 Elkhart Park G.S. 9400 11.7 11.9 98 11.0 12.0 92 Gros Ventre Summit 8750 11.5 12.0 96 10.5 11.6 91 Gunsight Pass 9820 13.3 12.4 107 12.4 13.1 95 Indian Creek 9425 26.3 22.2 118 22.2 18.2 122 Kendall R.S. 7740 12.2 11.2 109 12.4 12.7 98 Larsen Creek 9000 11.2 10.6 106 13.8 12.4 111 Loomis Park 8240 15.8 15.0 105 15.9 16.2 98 New Fork Lake 8340 10.8 10.1 107 -M 10.0 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 14.0 12.3 114 14.7 13.2 111 Spring Creek Divide 9000 25.5 23.7 108 18.7 22.6 83 Triple Peak 8500 23.2 22.2 105 23.5 24.4 96 ----- ----- Basin Index (%) 107 101 LOWER GREEN RIVER Blacks Fork Jct 8869 12.7 8.0 159 13.3 11.4 117 Buck Pasture 9632 19.2 -M * 19.8 -M * EF Blacks Fork GS 9360 13.4 11.0 122 10.2 10.0 102 Hams Fork 7840 14.9 10.6 141 13.3 10.4 128 Henrys Fork 10182 -M -M * -M -M * Hewinta 9500 12.4 9.6 129 14.7 12.2 120 Hickerson Park 9122 9.8 7.2 136 10.4 9.3 112 Hole-in-Rock 9168 8.8 7.0 126 9.8 9.0 109 Indian Creek 9425 26.3 22.2 118 22.2 18.2 122 Kelley R.S. 8180 19.3 14.2 136 19.6 15.2 129 Spirit Lk 10235 19.4 11.8 164 18.2 15.6 117 Steel Creek Park 10158 18.4 13.6 135 17.7 14.8 120 ----- ----- Basin Index (%) 135 118 UPPER BEAR RIVER Bear River RS 8777 13.8 8.5 162 14.6 11.1 132 Bug Lake 7987 27.6 17.7 156 22.7 16.8 135 Burts Miller Ranch 8000 9.6 5.6 171 13.0 7.1 183 Chalk Creek #1 9171 30.8 21.4 144 26.9 21.2 127 Giveout 6930 14.7 7.9 186 14.7 11.2 131 Hayden Fork 9130 22.0 14.0 157 24.3 18.8 129 Kelley R.S. 8180 19.3 14.2 136 19.6 15.2 129 Lily Lake 9133 14.7 11.9 124 16.0 14.0 114 Monte Cristo 8932 38.3 25.2 152 35.0 24.1 145 Salt River Summit 7640 18.5 12.9 143 17.6 14.8 119 Spring Creek Divide 9000 25.5 23.7 108 18.7 22.6 83 Trial Lake 9992 34.4 20.8 165 33.0 20.8 159 ----- ----- Basin Index (%) 146 130 ---------------------------------------------------------------------------- -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.