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: FEBRUARY 25 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.2 13.2 100 13.7 16.9 81 Black Bear 8170 26.2 28.7 91 24.5 30.1 81 Blind Bull Sum 8650 20.7 17.4 119 12.2 15.7 78 Cottonwood Creek 7670 22.7 16.2 140 23.7 19.1 124 East Rim Divide 7930 10.0 7.7 130 7.9 9.4 84 Grand Targhee 9260 33.5 28.9 116 23.1 24.3 95 Granite Creek 6770 13.5 13.3 102 -M 16.1 * Grassy Lake 7265 25.6 25.4 101 25.7 29.0 89 Gros Ventre Summit 8750 8.9 9.4 95 8.9 9.9 90 Gunsight Pass 9820 10.3 10.3 100 10.3 10.6 97 Lewis Lake Divide 7850 19.8 25.0 79 23.2 28.3 82 Phillips Bench 8200 22.9 19.2 119 22.2 22.3 100 Salt River Summit 7640 12.4 10.3 120 12.6 13.2 95 Snake River Station 6920 13.7 13.9 99 16.2 18.3 89 Spring Creek Divide 9000 21.6 17.8 121 20.4 18.9 108 Thumb Divide 7980 11.2 11.7 96 11.4 14.3 80 Togwotee Pass 9580 21.8 17.3 126 20.8 19.0 109 Two Ocean Plateau 9240 23.0 21.2 108 17.8 21.2 84 Willow Creek 8080 28.8 21.8 132 28.4 26.3 108 Younts Peak 8350 13.7 11.4 120 11.3 12.4 91 ----- ----- Basin Index (%) 110 93 MADISON-GALLATIN Black Bear 8170 26.2 28.7 91 24.5 30.1 81 Canyon 7870 10.8 10.2 106 11.0 12.8 86 Madison Plateau 7750 16.1 17.4 93 14.0 20.7 68 West Yellowstone 6700 8.7 8.6 101 7.4 11.3 65 Whiskey Creek 6800 11.5 11.7 98 13.2 15.9 83 ----- ----- Basin Index (%) 96 77 YELLOWSTONE Beartooth Lake 9360 17.7 16.1 110 16.3 15.4 106 Burnt Mtn 5880 5.2 4.0 130 10.1 9.1 111 Canyon 7870 10.8 10.2 106 11.0 12.8 86 Cole Creek 7850 14.0 9.2 152 10.5 8.8 119 Evening Star 9200 21.8 18.8 116 23.7 21.7 109 Fisher Creek 9100 24.7 25.1 98 25.4 25.0 102 Northeast Entrance 7350 8.8 7.8 113 9.9 9.7 102 Parker Peak 9400 20.4 15.5 132 18.7 13.7 136 Sylvan Lake 8420 16.6 15.5 107 18.3 17.6 104 Thumb Divide 7980 11.2 11.7 96 11.4 14.3 80 Two Ocean Plateau 9240 23.0 21.2 108 17.8 21.2 84 White Mill 8700 20.2 17.9 113 16.5 18.6 89 Wolverine 7650 11.2 8.4 133 10.7 9.7 110 Younts Peak 8350 13.7 11.4 120 11.3 12.4 91 ----- ----- Basin Index (%) 114 101 WIND RIVER Burroughs Creek 8750 9.4 -M * 10.4 -M * Castle Creek 8400 4.1 -M * 4.8 -M * Cold Springs 9630 5.9 5.4 109 5.6 7.3 77 Deer Park 9700 9.5 10.6 90 8.7 14.8 59 Hobbs Park 10100 9.8 9.3 105 8.3 9.2 90 Kirwin 9550 8.8 6.7 131 7.5 8.6 87 Little Warm 9370 8.8 7.7 114 7.0 9.6 73 Owl Creek 8975 4.9 3.8 129 5.3 4.2 126 South Pass 9040 8.7 11.0 79 7.8 13.1 60 St. Lawrence Alt 8620 3.8 5.0 76 5.2 6.3 83 Togwotee Pass 9580 21.8 17.3 126 20.8 19.0 109 Townsend Creek 8700 7.0 6.2 113 7.3 8.4 87 ----- ----- Basin Index (%) 107 83 BIGHORN BASIN Bald Mtn. 9380 17.8 14.2 125 13.4 12.6 106 Bear Trap Meadow 8200 7.8 4.2 186 7.9 6.0 132 Bone Springs Div 9350 14.1 11.5 123 11.4 11.4 100 Grave Springs 8550 8.9 6.4 139 9.3 7.6 122 Kirwin 9550 8.8 6.7 131 7.5 8.6 87 Marquette 8760 5.6 -M * 6.9 -M * Middle Powder 7760 10.8 7.7 140 10.5 8.5 124 Owl Creek 8975 4.9 3.8 129 5.3 4.2 126 Powder River Pass 9480 10.3 7.7 134 10.1 9.3 109 Shell Creek 9580 11.9 11.0 108 11.4 10.3 111 Timber Creek 7950 4.9 3.1 158 5.6 5.1 110 ----- ----- Basin Index (%) 131 111 SHOSHONE RIVER Blackwater 9780 17.4 16.8 104 17.4 15.8 110 Evening Star 9200 21.8 18.8 116 23.7 21.7 109 Marquette 8760 5.6 -M * 6.9 -M * Sylvan Lake 8420 16.6 15.5 107 18.3 17.6 104 Sylvan Road 7120 10.2 9.0 113 -M 13.6 * Younts Peak 8350 13.7 11.4 120 11.3 12.4 91 ----- ----- Basin Index (%) 111 105 POWDER RIVER Bear Trap Meadow 8200 7.8 4.2 186 7.9 6.0 132 Cloud Peak Reservoir 9860 11.1 10.1 110 10.5 9.3 113 Grave Springs 8550 8.9 6.4 139 9.3 7.6 122 Hansen Sawmill 8360 5.6 4.5 124 6.7 5.9 114 Middle Powder 7760 10.8 7.7 140 10.5 8.5 124 Powder River Pass 9480 10.3 7.7 134 10.1 9.3 109 Soldier Park 8720 4.3 -M * 6.9 -M * ----- ----- Basin Index (%) 134 118 TONGUE RIVER Big Goose 7990 7.1 6.0 118 8.0 7.6 105 Bone Springs Div 9350 14.1 11.5 123 11.4 11.4 100 Burgess Junction 7880 9.4 8.0 118 10.4 8.7 120 Dome Lake 8880 10.0 8.4 119 7.7 9.7 79 Little Goose 8870 8.6 -M * 6.6 -M * Sucker Creek 8880 11.3 8.6 131 10.2 10.2 100 Tie Creek 6870 7.3 4.2 174 10.9 8.0 136 ----- ----- Basin Index (%) 127 105 BELLE FOURCHE Blind Park 6890 6.7 6.2 108 7.0 9.1 77 Cole Canyon 5910 2.3 4.9 47 -M 6.9 * ----- ----- Basin Index (%) 81 77 CHEYENNE RIVER BASIN Blind Park 6890 6.7 6.2 108 7.0 9.1 77 North Rapid Creek 6130 6.3 5.8 109 7.0 7.3 96 ----- ----- Basin Index (%) 108 85 UPPER N. PLATTE Arapaho Ridge 10960 18.6 16.0 116 17.8 17.2 103 Blackhall Mtn 9820 24.2 -M * 23.5 -M * Columbine 9160 27.1 19.2 141 24.0 19.8 121 Divide Peak 8880 17.6 15.2 116 18.2 16.5 110 Joe Wright 10120 17.4 15.9 109 22.1 19.4 114 Laprele Creek 8375 10.3 7.5 137 10.5 9.1 115 Med Bow 10500 36.9 -M * 29.9 -M * Never Summer 10280 16.5 15.6 106 12.1 -M * North French Creek 10130 28.8 20.4 141 27.7 20.4 136 Old Battle 10000 25.5 23.5 109 23.3 27.2 86 Rawah 9020 10.7 8.3 129 12.1 10.5 115 Sage Creek Basin 7850 13.1 10.4 126 10.8 11.5 94 Sand Lake 10050 24.1 20.5 118 22.3 18.4 121 South Brush Creek 8440 11.4 9.8 116 11.3 11.4 99 Tower 10500 38.8 35.4 110 32.3 31.0 104 Webber Springs 9250 17.9 18.2 98 19.3 20.6 94 Whiskey Park 8950 28.9 20.7 140 27.3 21.9 125 Willow Creek Pass 9540 11.1 9.2 121 10.4 10.0 104 Zirkel 9340 24.2 22.5 108 -M 22.8 * ----- ----- Basin Index (%) 119 109 SWEETWATER Deer Park 9700 9.5 10.6 90 8.7 14.8 59 Larsen Creek 9000 -M 9.2 * 5.8 -M * South Pass 9040 8.7 11.0 79 7.8 13.1 60 ----- ----- Basin Index (%) 84 59 LOWER N. PLATTE Casper Mtn. 7900 13.6 9.7 140 9.1 10.8 84 Laprele Creek 8375 10.3 7.5 137 10.5 9.1 115 Reno Hill 8400 13.8 9.5 145 13.6 10.8 126 Windy Peak 7900 8.3 5.6 148 6.7 7.6 88 ----- ----- Basin Index (%) 142 104 LARAMIE RIVER Brooklyn Lake 10240 23.0 14.6 158 22.0 15.6 141 Cinnabar Park 9574 20.4 16.6 123 22.2 19.2 116 Crow Creek 8330 7.1 6.6 108 9.1 7.6 120 Deadman Hill 10220 15.0 12.2 123 13.1 12.4 106 Rawah 9020 10.7 8.3 129 12.1 10.5 115 Roach 9700 12.0 12.1 99 11.7 14.3 82 Windy Peak 7900 8.3 5.6 148 6.7 7.6 88 ----- ----- Basin Index (%) 127 111 S. PLATTE Black Mountain 8920 8.8 -M * 10.7 -M * Crow Creek 8330 7.1 6.6 108 9.1 7.6 120 Deadman Hill 10220 15.0 12.2 123 13.1 12.4 106 ----- ----- Basin Index (%) 118 111 LITTLE SNAKE RIVER Battle Mountain 7440 12.3 9.5 129 12.5 11.8 106 Divide Peak 8880 17.6 15.2 116 18.2 16.5 110 Elk River 8700 18.2 14.7 124 15.0 15.6 96 Little Snake River 8915 23.6 19.4 122 27.3 24.4 112 Old Battle 10000 25.5 23.5 109 23.3 27.2 86 Sage Creek Basin 7850 13.1 10.4 126 10.8 11.5 94 Sandstone RS 8150 14.5 10.3 141 13.4 14.7 91 Whiskey Park 8950 28.9 20.7 140 27.3 21.9 125 ----- ----- Basin Index (%) 124 103 UPPER GREEN RIVER Big Sandy Opening 9080 7.3 9.7 75 6.1 10.2 60 Blind Bull Sum 8650 20.7 17.4 119 12.2 15.7 78 East Rim Divide 7930 10.0 7.7 130 7.9 9.4 84 Elkhart Park G.S. 9400 8.6 9.2 93 8.2 10.3 80 Gros Ventre Summit 8750 8.9 9.4 95 8.9 9.9 90 Gunsight Pass 9820 10.3 10.3 100 10.3 10.6 97 Indian Creek 9425 18.8 18.2 103 13.3 17.4 76 Kendall R.S. 7740 8.7 9.6 91 8.6 11.4 75 Loomis Park 8240 12.1 11.4 106 14.6 13.8 106 New Fork Lake 8340 8.9 7.9 113 6.8 8.6 79 Pocket Creek 9360 -M -M * 6.1 -M * Snider Basin 8060 11.6 9.3 125 11.9 11.3 105 Spring Creek Divide 9000 21.6 17.8 121 20.4 18.9 108 Triple Peak 8500 22.1 16.4 135 21.9 19.8 111 ----- ----- Basin Index (%) 110 90 LOWER GREEN RIVER Blacks Fork Jct 8869 6.3 -M * 9.7 -M * Buck Pasture 9632 14.7 -M * 14.3 -M * EF Blacks Fork GS 9360 12.0 -M * -M -M * Hams Fork 7840 10.8 8.9 121 9.5 9.0 106 Hewinta 9500 8.6 7.6 113 11.7 10.5 111 Hickerson Park 9122 8.5 5.6 152 9.0 7.4 122 Hole-in-Rock 9168 8.6 5.4 159 8.6 6.9 125 Indian Creek 9425 18.8 18.2 103 13.3 17.4 76 Kelley R.S. 8180 12.7 11.6 109 13.5 14.3 94 Spirit Lk 10235 13.1 -M * 13.9 -M * Steel Creek Park 10158 12.5 11.1 113 14.5 12.0 121 ----- ----- Basin Index (%) 118 103 UPPER BEAR RIVER Bear River RS 8777 7.4 -M * 8.7 -M * Bug Lake 7987 16.2 14.3 113 14.8 15.1 98 Burts Miller Ranch 8000 5.2 -M * 5.6 -M * Chalk Creek #1 9171 15.9 17.7 90 14.8 19.0 78 Hayden Fork 9130 13.2 11.6 114 16.4 16.0 102 Kelley R.S. 8180 12.7 11.6 109 13.5 14.3 94 Lily Lake 9133 9.6 9.9 97 9.7 12.9 75 Monte Cristo 8932 22.8 20.0 114 20.1 20.0 100 Salt River Summit 7640 12.4 10.3 120 12.6 13.2 95 Spring Creek Divide 9000 21.6 17.8 121 20.4 18.9 108 ----- ----- Basin Index (%) 110 95 ----------------------------------------------------------------------------- -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.