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 SUNDAY: MARCH 26 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.9 16.2 110 19.2 19.2 100 Blind Bull Sum 8650 24.0 23.2 103 16.7 17.2 97 Cottonwood Creek 7670 23.9 20.8 115 -M 23.8 * East Rim Divide 7930 11.9 10.2 117 11.2 10.6 106 Grand Targhee 9260 42.9 39.2 109 22.6 28.8 78 Granite Creek 6770 -M 15.5 * -M 17.0 * Grassy Lake 7265 33.5 30.8 109 36.4 32.7 111 Gros Ventre Summit 8750 11.7 11.8 99 10.4 11.4 91 Gunsight Pass 9820 13.2 12.3 107 12.4 12.8 97 Lewis Lake Divide 7850 34.8 29.3 119 -M 30.9 * Loomis Park 8240 15.8 15.0 105 15.9 16.0 99 Phillips Bench 8200 28.9 24.5 118 25.8 25.4 102 Salt River Summit 7640 18.6 13.0 143 17.6 14.8 119 Snake River Station 6920 19.3 16.6 116 21.7 20.4 106 Somsen Ranch 6800 19.5 11.8 165 20.4 15.2 134 Spring Creek Divide 9000 25.5 23.7 108 18.7 22.4 83 Thumb Divide 7980 19.7 15.2 130 18.1 16.4 110 Togwotee Pass 9580 21.5 22.5 96 19.6 23.3 84 Triple Peak 8500 23.3 22.2 105 23.7 24.3 98 Two Ocean Plateau 9240 29.7 27.4 108 21.0 24.4 86 Willow Creek 8080 35.2 27.9 126 33.6 30.5 110 Younts Peak 8350 15.8 13.8 114 12.8 13.6 94 ----- ----- Basin Index (%) 114 100 MADISON HEADWATERS IN WYOMING Black Bear 8170 43.0 35.6 121 39.6 34.2 116 Canyon 7870 13.9 -M * 16.2 -M * Madison Plateau 7750 28.9 21.1 137 27.3 22.5 121 West Yellowstone 6700 16.2 10.0 162 18.7 13.2 142 Whiskey Creek 6800 20.4 14.5 141 24.6 18.2 135 ----- ----- Basin Index (%) 134 125 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 18.0 20.8 87 16.6 19.0 87 Canyon 7870 13.9 -M * 16.2 -M * Evening Star 9200 25.2 24.1 105 26.8 26.6 101 Fisher Creek 9100 32.8 30.8 106 33.2 30.5 109 Monument Peak 8850 21.0 19.2 109 23.4 19.8 118 Northeast Entrance 7350 9.9 9.6 103 12.0 12.4 97 Parker Peak 9400 22.5 19.7 114 21.8 18.7 117 Sylvan Lake 8420 19.6 18.6 105 22.1 21.2 104 Thumb Divide 7980 19.7 15.2 130 18.1 16.4 110 Two Ocean Plateau 9240 29.7 27.4 108 21.0 24.4 86 White Mill 8700 23.6 22.4 105 22.3 21.6 103 Wolverine 7650 13.0 10.9 119 12.2 11.6 105 ----- ----- Basin Index (%) 107 103 WIND RIVER Burroughs Creek 8750 10.5 -M * 10.3 -M * Castle Creek 8400 6.2 6.8 91 6.8 7.9 86 Cold Springs 9630 7.6 6.8 112 9.0 8.2 110 Deer Park 9700 22.6 13.4 169 22.8 16.4 139 Hobbs Park 10100 14.6 12.9 113 13.6 11.2 121 Kirwin 9550 9.8 10.0 98 11.9 10.7 111 Little Warm 9370 10.1 9.6 105 11.4 11.2 102 South Pass 9040 18.2 13.8 132 17.4 14.1 123 St. Lawrence Alt 8620 7.1 -M * 9.2 -M * Togwotee Pass 9580 21.5 22.5 96 19.6 23.3 84 Townsend Creek 8700 10.8 8.2 132 11.7 9.5 123 ----- ----- Basin Index (%) 117 110 BIGHORN BASIN Bald Mtn. 9380 17.4 16.8 104 14.2 14.9 95 Bear Trap Meadow 8200 8.8 6.0 147 8.9 7.4 120 Bone Springs Div 9350 14.2 15.2 93 11.4 13.9 82 Grave Springs 8550 9.5 7.9 120 9.9 8.6 115 Kirwin 9550 9.8 10.0 98 11.9 10.7 111 Marquette 8760 7.8 6.6 118 8.5 8.1 105 Middle Powder 7760 10.8 9.8 110 9.2 9.1 101 Owl Creek 8975 7.1 5.0 142 7.6 5.4 141 Powder River Pass 9480 10.7 10.2 105 12.9 11.6 111 Shell Creek 9580 13.0 14.1 92 13.3 12.9 103 Timber Creek 7950 5.9 4.0 148 6.5 6.6 98 ----- ----- Basin Index (%) 109 105 SHOSHONE RIVER Blackwater 9780 19.8 21.0 94 20.0 20.5 98 Evening Star 9200 25.2 24.1 105 26.8 26.6 101 Marquette 8760 7.8 6.6 118 8.5 8.1 105 Sylvan Lake 8420 19.6 18.6 105 22.1 21.2 104 Sylvan Road 7120 10.7 11.3 95 14.3 15.2 94 Younts Peak 8350 15.8 13.8 114 12.8 13.6 94 ----- ----- Basin Index (%) 104 99 POWDER RIVER Bear Trap Meadow 8200 8.8 6.0 147 8.9 7.4 120 Cloud Peak Reservoir 9860 13.9 13.6 102 13.5 12.0 112 Grave Springs 8550 9.5 7.9 120 9.9 8.6 115 Hansen Sawmill 8360 8.2 6.0 137 8.4 7.8 108 Middle Powder 7760 10.8 9.8 110 9.2 9.1 101 Powder River Pass 9480 10.7 10.2 105 12.9 11.6 111 Soldier Park 8720 8.4 6.4 131 7.8 8.2 95 ----- ----- Basin Index (%) 117 109 TONGUE RIVER Big Goose 7990 9.3 7.4 126 9.9 9.0 110 Bone Springs Div 9350 14.2 15.2 93 11.4 13.9 82 Burgess Junction 7880 11.7 9.8 119 13.0 10.5 124 Dome Lake 8880 10.6 10.6 100 10.8 11.4 95 Little Goose 8870 10.2 8.6 119 11.0 10.7 103 Sucker Creek 8880 12.9 11.1 116 15.3 12.4 123 Tie Creek 6870 8.8 4.6 191 12.1 9.4 129 ----- ----- Basin Index (%) 115 108 BELLE FOURCHE Blind Park 6890 8.9 7.0 127 10.6 9.9 107 Cole Canyon 5910 8.4 5.0 168 9.5 8.0 119 North Rapid Creek 6130 7.6 6.6 115 8.3 8.2 101 ----- ----- Basin Index (%) 134 109 CHEYENNE RIVER BASIN Blind Park 6890 8.9 7.0 127 10.6 9.9 107 North Rapid Creek 6130 7.6 6.6 115 8.3 8.2 101 ----- ----- Basin Index (%) 121 104 UPPER N. PLATTE Arapaho Ridge 10976 24.6 20.2 122 23.5 19.8 119 Blackhall Mtn 9839 37.0 28.6 129 35.8 27.6 130 Cinnabar Park 9707 -M 19.4 * 22.2 22.0 101 Columbine 9167 27.9 21.5 130 24.5 22.2 110 Divide Peak 8730 27.7 18.2 152 27.7 20.2 137 Joe Wright 10158 24.0 18.8 128 25.8 24.2 107 Laprele Creek 8390 11.5 9.0 128 11.9 10.7 111 Med Bow 10512 38.2 -M * 31.1 -M * Never Summer 10323 24.7 18.8 131 17.5 15.8 111 North French Creek 10153 29.3 26.2 112 28.2 24.2 117 Old Battle 9860 40.0 28.0 143 30.9 31.0 100 Rawah 9069 14.8 10.2 145 16.3 14.2 115 Sage Creek Basin 7850 25.1 12.3 204 20.1 11.8 170 Sand Lake 10098 27.2 24.7 110 25.8 22.8 113 South Brush Creek 8495 15.4 11.3 136 14.0 12.6 111 Tower 10620 49.4 39.9 124 -M 36.6 * Webber Springs 9260 29.3 20.8 141 30.6 23.8 129 Whiskey Park 9020 38.4 24.8 155 34.1 25.6 133 Willow Creek Pass 9523 17.2 12.0 143 16.6 12.8 130 Zirkel 9338 31.8 26.7 119 33.0 28.6 115 ----- ----- Basin Index (%) 133 119 SWEETWATER Deer Park 9700 22.6 13.4 169 22.8 16.4 139 Larsen Creek 9000 11.3 10.4 109 13.9 12.2 114 South Pass 9040 18.2 13.8 132 17.4 14.1 123 ----- ----- Basin Index (%) 139 127 LOWER N. PLATTE Casper Mtn. 7920 12.8 12.3 104 12.5 12.6 99 Laprele Creek 8390 11.5 9.0 128 11.9 10.7 111 Reno Hill 8430 14.0 12.6 111 15.2 12.7 120 Windy Peak 7915 10.4 7.6 137 11.1 9.0 123 ----- ----- Basin Index (%) 117 113 LARAMIE RIVER Brooklyn Lake 10250 24.1 19.8 122 24.0 19.8 121 Cinnabar Park 9707 -M 19.4 * 22.2 22.0 101 Crow Creek 8335 5.1 6.1 84 8.3 9.9 84 Deadman Hill 10239 18.4 15.4 119 17.0 16.1 106 Rawah 9069 14.8 10.2 145 16.3 14.2 115 Roach 9740 17.9 14.3 125 19.9 17.0 117 Windy Peak 7915 10.4 7.6 137 11.1 9.0 123 ----- ----- Basin Index (%) 124 110 S. PLATTE Crow Creek 8335 5.1 6.1 84 8.3 9.9 84 ----- ----- Basin Index (%) 84 84 LITTLE SNAKE RIVER Battle Mountain 7498 17.9 10.9 164 21.6 13.8 157 Divide Peak 8730 27.7 18.2 152 27.7 20.2 137 Elk River 8739 28.7 17.0 169 25.3 17.5 145 Elkhead Divide 8800 32.0 -M * -M -M * Little Snake River 8928 38.2 24.8 154 37.2 29.9 124 Old Battle 9860 40.0 28.0 143 30.9 31.0 100 Sage Creek Basin 7850 25.1 12.3 204 20.1 11.8 170 Sandstone RS 8152 -M 12.0 * 24.4 16.6 147 Whiskey Park 9020 38.4 24.8 155 34.1 25.6 133 ----- ----- Basin Index (%) 159 133 UPPER GREEN RIVER Big Sandy Opening 9080 14.4 12.6 114 14.6 12.0 122 Blind Bull Sum 8650 24.0 23.2 103 16.7 17.2 97 East Rim Divide 7930 11.9 10.2 117 11.2 10.6 106 Elkhart Park G.S. 9400 11.7 11.9 98 11.0 11.8 93 Gros Ventre Summit 8750 11.7 11.8 99 10.4 11.4 91 Gunsight Pass 9820 13.2 12.3 107 12.4 12.8 97 Indian Creek 9425 26.5 22.0 120 22.3 18.2 123 Kendall R.S. 7740 12.3 11.2 110 12.4 12.6 98 Larsen Creek 9000 11.3 10.4 109 13.9 12.2 114 Loomis Park 8240 15.8 15.0 105 15.9 16.0 99 New Fork Lake 8340 10.8 10.0 108 -M 9.9 * Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 14.0 12.3 114 14.7 13.0 113 Spring Creek Divide 9000 25.5 23.7 108 18.7 22.4 83 Triple Peak 8500 23.3 22.2 105 23.7 24.3 98 ----- ----- Basin Index (%) 108 102 LOWER GREEN RIVER Blacks Fork Jct 8869 12.7 8.0 159 13.4 11.4 118 Buck Pasture 9632 19.1 -M * 19.9 -M * EF Blacks Fork GS 9360 13.2 11.0 120 10.2 10.0 102 Hams Fork 7840 14.9 10.6 141 13.4 10.2 131 Henrys Fork 10182 -M -M * 15.7 -M * Hewinta 9500 12.3 9.4 131 14.6 12.1 121 Hickerson Park 9122 9.8 7.0 140 10.4 9.2 113 Hole-in-Rock 9168 8.7 7.0 124 9.8 9.0 109 Indian Creek 9425 26.5 22.0 120 22.3 18.2 123 Kelley R.S. 8180 19.4 14.2 137 19.7 15.0 131 Spirit Lk 10235 -M 11.6 * 18.2 15.6 117 Steel Creek Park 10158 18.3 13.6 135 18.0 14.6 123 ----- ----- Basin Index (%) 132 120 UPPER BEAR RIVER Bear River RS 8777 13.7 8.4 163 14.8 11.0 135 Bug Lake 7987 27.4 17.6 156 22.3 16.7 134 Burts Miller Ranch 8000 9.5 5.6 170 12.9 7.1 182 Chalk Creek #1 9171 30.7 21.4 143 26.8 21.0 128 Giveout 6930 14.7 8.0 184 14.7 10.8 136 Hayden Fork 9130 22.0 14.0 157 24.3 18.6 131 Kelley R.S. 8180 19.4 14.2 137 19.7 15.0 131 Lily Lake 9133 14.6 11.8 124 16.2 14.0 116 Monte Cristo 8932 37.9 25.2 150 -M 23.8 * Salt River Summit 7640 18.6 13.0 143 17.6 14.8 119 Spring Creek Divide 9000 25.5 23.7 108 18.7 22.4 83 Trial Lake 9992 34.3 20.8 165 32.1 20.8 154 ----- ----- Basin Index (%) 146 128 ----------------------------------------------------------------------------- -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.