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: FEBRUARY 26 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.1 13.3 98 13.6 17.0 80 Black Bear 8170 26.2 28.9 91 24.5 30.3 81 Blind Bull Sum 8650 20.7 17.5 118 12.2 15.7 78 Cottonwood Creek 7670 22.6 16.3 139 23.6 19.2 123 East Rim Divide 7930 10.0 7.8 128 8.0 9.4 85 Grand Targhee 9260 33.4 29.2 114 23.0 24.5 94 Granite Creek 6770 13.5 13.4 101 -M 16.2 * Grassy Lake 7265 25.5 25.6 100 25.6 29.1 88 Gros Ventre Summit 8750 8.8 9.5 93 8.7 9.9 88 Gunsight Pass 9820 10.3 10.4 99 10.3 10.6 97 Lewis Lake Divide 7850 19.9 25.1 79 23.1 28.4 81 Phillips Bench 8200 22.9 19.3 119 22.2 22.4 99 Salt River Summit 7640 12.4 10.4 119 12.6 13.3 95 Snake River Station 6920 13.7 14.0 98 16.1 18.4 88 Spring Creek Divide 9000 21.5 18.0 119 20.3 19.0 107 Thumb Divide 7980 11.1 11.8 94 11.3 14.4 78 Togwotee Pass 9580 21.8 17.4 125 20.8 19.1 109 Two Ocean Plateau 9240 22.9 21.3 108 17.7 21.4 83 Willow Creek 8080 28.8 21.9 132 28.3 26.4 107 Younts Peak 8350 13.6 11.5 118 11.0 12.4 89 ----- ----- Basin Index (%) 109 92 MADISON-GALLATIN Black Bear 8170 26.2 28.9 91 24.5 30.3 81 Canyon 7870 10.6 10.3 103 10.8 12.8 84 Madison Plateau 7750 16.2 17.5 93 14.0 20.8 67 West Yellowstone 6700 8.7 8.7 100 7.4 11.4 65 Whiskey Creek 6800 11.6 11.8 98 13.2 16.0 82 ----- ----- Basin Index (%) 95 77 YELLOWSTONE Beartooth Lake 9360 17.7 16.2 109 16.3 15.5 105 Burnt Mtn 5880 5.4 4.0 135 9.9 9.2 108 Canyon 7870 10.6 10.3 103 10.8 12.8 84 Cole Creek 7850 14.2 9.3 153 10.6 8.9 119 Evening Star 9200 22.0 18.9 116 23.8 21.8 109 Fisher Creek 9100 24.7 25.2 98 25.4 25.1 101 Northeast Entrance 7350 8.8 7.8 113 9.9 9.8 101 Parker Peak 9400 20.3 15.6 130 18.7 13.8 136 Sylvan Lake 8420 16.7 15.6 107 18.2 17.7 103 Thumb Divide 7980 11.1 11.8 94 11.3 14.4 78 Two Ocean Plateau 9240 22.9 21.3 108 17.7 21.4 83 White Mill 8700 20.3 18.0 113 16.6 18.7 89 Wolverine 7650 11.2 8.5 132 10.7 9.8 109 Younts Peak 8350 13.6 11.5 118 11.0 12.4 89 ----- ----- Basin Index (%) 113 100 WIND RIVER Burroughs Creek 8750 9.4 -M * 10.5 -M * Castle Creek 8400 4.1 -M * 4.7 -M * Cold Springs 9630 5.9 5.4 109 5.6 7.3 77 Deer Park 9700 9.5 10.7 89 8.5 14.9 57 Hobbs Park 10100 9.7 9.3 104 8.2 9.3 88 Kirwin 9550 8.8 6.8 129 7.5 8.6 87 Little Warm 9370 8.8 7.8 113 6.9 9.7 71 Owl Creek 8975 4.9 3.8 129 5.3 4.2 126 South Pass 9040 8.6 11.1 77 7.6 13.2 58 St. Lawrence Alt 8620 3.6 5.0 72 5.1 6.3 81 Togwotee Pass 9580 21.8 17.4 125 20.8 19.1 109 Townsend Creek 8700 6.9 6.3 110 7.1 8.5 84 ----- ----- Basin Index (%) 106 82 BIGHORN BASIN Bald Mtn. 9380 17.9 14.3 125 13.2 12.8 103 Bear Trap Meadow 8200 7.7 4.2 183 7.8 6.0 130 Bone Springs Div 9350 14.0 11.6 121 11.5 11.4 101 Grave Springs 8550 8.9 6.5 137 9.3 7.7 121 Kirwin 9550 8.8 6.8 129 7.5 8.6 87 Marquette 8760 5.7 -M * 7.0 -M * Middle Powder 7760 10.8 7.8 138 10.4 8.6 121 Owl Creek 8975 4.9 3.8 129 5.3 4.2 126 Powder River Pass 9480 10.3 7.7 134 10.1 9.4 107 Shell Creek 9580 12.0 11.2 107 11.4 10.3 111 Timber Creek 7950 5.0 3.2 156 5.6 5.1 110 ----- ----- Basin Index (%) 130 110 SHOSHONE RIVER Blackwater 9780 17.4 16.8 104 17.6 15.8 111 Evening Star 9200 22.0 18.9 116 23.8 21.8 109 Marquette 8760 5.7 -M * 7.0 -M * Sylvan Lake 8420 16.7 15.6 107 18.2 17.7 103 Sylvan Road 7120 10.2 9.1 112 -M 13.7 * Younts Peak 8350 13.6 11.5 118 11.0 12.4 89 ----- ----- Basin Index (%) 111 104 POWDER RIVER Bear Trap Meadow 8200 7.7 4.2 183 7.8 6.0 130 Cloud Peak Reservoir 9860 11.2 10.2 110 10.6 9.3 114 Grave Springs 8550 8.9 6.5 137 9.3 7.7 121 Hansen Sawmill 8360 5.6 4.6 122 6.7 5.9 114 Middle Powder 7760 10.8 7.8 138 10.4 8.6 121 Powder River Pass 9480 10.3 7.7 134 10.1 9.4 107 Soldier Park 8720 4.3 -M * 6.8 -M * ----- ----- Basin Index (%) 133 117 TONGUE RIVER Big Goose 7990 7.1 6.1 116 8.3 7.7 108 Bone Springs Div 9350 14.0 11.6 121 11.5 11.4 101 Burgess Junction 7880 9.5 8.0 119 10.4 8.8 118 Dome Lake 8880 10.0 8.4 119 7.7 9.8 79 Little Goose 8870 8.6 -M * 6.7 -M * Sucker Creek 8880 11.4 8.7 131 10.3 10.3 100 Tie Creek 6870 7.3 4.2 174 10.9 8.1 135 ----- ----- Basin Index (%) 126 105 BELLE FOURCHE Blind Park 6890 6.7 6.2 108 6.9 9.2 75 Cole Canyon 5910 2.2 4.9 45 -M 7.0 * ----- ----- Basin Index (%) 80 75 CHEYENNE RIVER BASIN Blind Park 6890 6.7 6.2 108 6.9 9.2 75 North Rapid Creek 6130 6.5 5.8 112 7.2 7.4 97 ----- ----- Basin Index (%) 110 85 UPPER N. PLATTE Arapaho Ridge 10960 18.5 16.1 115 17.8 17.3 103 Blackhall Mtn 9820 24.3 -M * 23.6 -M * Columbine 9160 27.0 19.3 140 -M 20.0 * Divide Peak 8880 17.4 15.3 114 18.2 16.5 110 Joe Wright 10120 17.7 16.0 111 22.3 19.6 114 Laprele Creek 8375 10.6 7.5 141 10.8 9.2 117 Med Bow 10500 37.0 -M * 29.8 -M * Never Summer 10280 16.7 15.8 106 12.1 -M * North French Creek 10130 28.9 20.6 140 27.8 20.7 134 Old Battle 10000 25.5 23.6 108 23.3 27.4 85 Rawah 9020 10.8 8.4 129 12.1 10.6 114 Sage Creek Basin 7850 13.2 10.5 126 10.7 11.5 93 Sand Lake 10050 24.1 20.7 116 22.2 18.6 119 South Brush Creek 8440 11.4 9.9 115 11.3 11.5 98 Tower 10500 39.0 35.6 110 32.4 31.2 104 Webber Springs 9250 17.8 18.3 97 19.2 20.8 92 Whiskey Park 8950 28.9 20.8 139 27.4 22.0 125 Willow Creek Pass 9540 11.2 9.2 122 10.3 10.1 102 Zirkel 9340 24.1 22.6 107 26.2 23.0 114 ----- ----- Basin Index (%) 118 108 SWEETWATER Deer Park 9700 9.5 10.7 89 8.5 14.9 57 Larsen Creek 9000 -M 9.3 * 5.7 -M * South Pass 9040 8.6 11.1 77 7.6 13.2 58 ----- ----- Basin Index (%) 83 57 LOWER N. PLATTE Casper Mtn. 7900 13.8 9.8 141 9.2 10.9 84 Laprele Creek 8375 10.6 7.5 141 10.8 9.2 117 Reno Hill 8400 14.1 9.6 147 14.3 10.9 131 Windy Peak 7900 8.5 5.7 149 6.8 7.7 88 ----- ----- Basin Index (%) 144 106 LARAMIE RIVER Brooklyn Lake 10240 23.0 14.7 156 22.1 15.8 140 Cinnabar Park 9574 20.4 16.7 122 22.2 19.4 114 Crow Creek 8330 7.0 6.6 106 9.0 7.7 117 Deadman Hill 10220 15.1 12.3 123 13.1 12.5 105 Rawah 9020 10.8 8.4 129 12.1 10.6 114 Roach 9700 12.0 12.2 98 11.6 14.4 81 Windy Peak 7900 8.5 5.7 149 6.8 7.7 88 ----- ----- Basin Index (%) 126 110 S. PLATTE Black Mountain 8920 8.7 -M * 10.7 -M * Crow Creek 8330 7.0 6.6 106 9.0 7.7 117 Deadman Hill 10220 15.1 12.3 123 13.1 12.5 105 ----- ----- Basin Index (%) 117 109 LITTLE SNAKE RIVER Battle Mountain 7440 12.1 9.7 125 12.2 11.9 103 Divide Peak 8880 17.4 15.3 114 18.2 16.5 110 Elk River 8700 18.2 14.9 122 15.3 15.7 97 Little Snake River 8915 23.5 19.5 121 27.4 24.7 111 Old Battle 10000 25.5 23.6 108 23.3 27.4 85 Sage Creek Basin 7850 13.2 10.5 126 10.7 11.5 93 Sandstone RS 8150 14.3 10.3 139 13.4 14.9 90 Whiskey Park 8950 28.9 20.8 139 27.4 22.0 125 ----- ----- Basin Index (%) 123 102 UPPER GREEN RIVER Big Sandy Opening 9080 7.2 9.8 73 6.1 10.3 59 Blind Bull Sum 8650 20.7 17.5 118 12.2 15.7 78 East Rim Divide 7930 10.0 7.8 128 8.0 9.4 85 Elkhart Park G.S. 9400 8.6 9.2 93 8.1 10.3 79 Gros Ventre Summit 8750 8.8 9.5 93 8.7 9.9 88 Gunsight Pass 9820 10.3 10.4 99 10.3 10.6 97 Indian Creek 9425 18.8 18.3 103 13.2 17.5 75 Kendall R.S. 7740 8.6 9.6 90 8.5 11.5 74 Loomis Park 8240 12.1 11.5 105 14.7 13.8 107 New Fork Lake 8340 8.8 8.0 110 -M 8.6 * Pocket Creek 9360 -M -M * 6.2 -M * Snider Basin 8060 11.6 9.4 123 12.0 11.3 106 Spring Creek Divide 9000 21.5 18.0 119 20.3 19.0 107 Triple Peak 8500 22.1 16.5 134 21.9 19.9 110 ----- ----- Basin Index (%) 109 90 LOWER GREEN RIVER Blacks Fork Jct 8869 6.1 -M * 9.7 -M * Buck Pasture 9632 14.6 -M * 14.3 -M * EF Blacks Fork GS 9360 11.9 -M * 7.7 -M * Hams Fork 7840 10.7 9.0 119 9.4 9.0 104 Hewinta 9500 8.7 7.6 114 11.6 10.6 109 Hickerson Park 9122 8.5 5.6 152 9.1 7.4 123 Hole-in-Rock 9168 8.5 5.4 157 8.5 6.9 123 Indian Creek 9425 18.8 18.3 103 13.2 17.5 75 Kelley R.S. 8180 12.6 11.7 108 13.4 14.4 93 Spirit Lk 10235 13.0 -M * 13.9 -M * Steel Creek Park 10158 12.5 11.2 112 14.5 12.1 120 ----- ----- Basin Index (%) 117 102 UPPER BEAR RIVER Bear River RS 8777 7.4 -M * 8.6 -M * Bug Lake 7987 16.1 14.4 112 14.8 15.2 97 Burts Miller Ranch 8000 5.2 -M * 5.5 -M * Chalk Creek #1 9171 15.8 17.8 89 14.7 19.1 77 Hayden Fork 9130 13.3 11.7 114 16.4 16.1 102 Kelley R.S. 8180 12.6 11.7 108 13.4 14.4 93 Lily Lake 9133 9.5 9.9 96 9.8 13.0 75 Monte Cristo 8932 22.8 20.2 113 20.0 20.2 99 Salt River Summit 7640 12.4 10.4 119 12.6 13.3 95 Spring Creek Divide 9000 21.5 18.0 119 20.3 19.0 107 ----- ----- Basin Index (%) 109 94 ----------------------------------------------------------------------------- -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. ---------------------------------------------------------------------------- -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.