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: FEBRUARY 23 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 12.9 13.1 98 13.5 16.7 81 Black Bear 8170 26.0 28.3 92 24.4 29.6 82 Blind Bull Sum 8650 20.6 17.3 119 12.1 15.4 79 Cottonwood Creek 7670 22.1 16.0 138 23.2 18.8 123 East Rim Divide 7930 9.9 7.6 130 8.0 9.2 87 Grand Targhee 9260 33.0 28.3 117 22.9 23.9 96 Granite Creek 6770 13.4 13.1 102 12.2 15.9 77 Grassy Lake 7265 25.2 25.1 100 25.4 28.6 89 Gros Ventre Summit 8750 8.7 9.4 93 8.6 9.7 89 Gunsight Pass 9820 10.1 10.1 100 10.1 10.4 97 Lewis Lake Divide 7850 19.7 24.8 79 22.9 27.8 82 Phillips Bench 8200 22.3 19.0 117 21.7 21.9 99 Salt River Summit 7640 12.3 10.2 121 12.7 12.9 98 Snake River Station 6920 13.5 13.7 99 15.8 18.0 88 Spring Creek Divide 9000 21.4 17.5 122 20.3 18.6 109 Thumb Divide 7980 11.0 11.4 96 11.1 14.1 79 Togwotee Pass 9580 21.1 17.1 123 20.1 18.7 107 Two Ocean Plateau 9240 22.3 20.8 107 17.5 20.9 84 Willow Creek 8080 28.4 21.3 133 28.0 25.8 109 Younts Peak 8350 13.2 11.3 117 11.0 12.2 90 ----- ----- Basin Index (%) 109 93 MADISON-GALLATIN Black Bear 8170 26.0 28.3 92 24.4 29.6 82 Canyon 7870 10.7 10.1 106 10.9 12.6 87 Madison Plateau 7750 16.1 17.2 94 13.9 20.3 68 West Yellowstone 6700 8.7 8.4 104 7.4 11.2 66 Whiskey Creek 6800 11.5 11.5 100 13.2 15.7 84 ----- ----- Basin Index (%) 97 78 YELLOWSTONE Beartooth Lake 9360 17.3 16.0 108 16.1 15.1 107 Burnt Mtn 5880 4.9 3.9 126 10.0 9.0 111 Canyon 7870 10.7 10.1 106 10.9 12.6 87 Cole Creek 7850 13.8 9.1 152 10.5 8.7 121 Evening Star 9200 21.6 18.6 116 23.5 21.4 110 Fisher Creek 9100 24.4 24.9 98 25.0 24.6 102 Northeast Entrance 7350 8.6 7.6 113 9.7 9.6 101 Parker Peak 9400 20.0 15.2 132 18.3 13.5 136 Sylvan Lake 8420 16.3 15.3 107 17.9 17.3 103 Thumb Divide 7980 11.0 11.4 96 11.1 14.1 79 Two Ocean Plateau 9240 22.3 20.8 107 17.5 20.9 84 White Mill 8700 19.9 17.7 112 16.4 18.4 89 Wolverine 7650 11.1 8.4 132 10.6 9.6 110 Younts Peak 8350 13.2 11.3 117 11.0 12.2 90 ----- ----- Basin Index (%) 113 101 WIND RIVER Burroughs Creek 8750 9.3 -M * 10.5 -M * Castle Creek 8400 4.1 -M * 4.7 -M * Cold Springs 9630 5.9 5.4 109 5.8 7.2 81 Deer Park 9700 9.5 10.4 91 8.8 14.5 61 Hobbs Park 10100 9.7 9.1 107 8.4 9.0 93 Kirwin 9550 8.6 6.6 130 7.5 8.4 89 Little Warm 9370 8.7 7.7 113 7.2 9.4 77 Owl Creek 8975 4.9 3.7 132 5.2 4.1 127 South Pass 9040 8.6 10.8 80 7.8 12.9 60 St. Lawrence Alt 8620 3.8 5.0 76 5.2 6.2 84 Togwotee Pass 9580 21.1 17.1 123 20.1 18.7 107 Townsend Creek 8700 6.9 6.1 113 7.2 8.3 87 ----- ----- Basin Index (%) 107 84 BIGHORN BASIN Bald Mtn. 9380 17.4 14.0 124 13.7 12.5 110 Bear Trap Meadow 8200 7.8 4.1 190 8.0 5.9 136 Bone Springs Div 9350 13.6 11.3 120 11.5 11.2 103 Grave Springs 8550 8.7 6.2 140 9.1 7.5 121 Kirwin 9550 8.6 6.6 130 7.5 8.4 89 Marquette 8760 5.4 -M * 6.7 -M * Middle Powder 7760 10.3 7.5 137 10.4 8.3 125 Owl Creek 8975 4.9 3.7 132 5.2 4.1 127 Powder River Pass 9480 10.1 7.6 133 10.1 9.2 110 Shell Creek 9580 11.7 10.8 108 11.4 10.1 113 Timber Creek 7950 4.8 3.1 155 5.4 5.0 108 ----- ----- Basin Index (%) 131 112 SHOSHONE RIVER Blackwater 9780 17.0 16.6 102 17.3 15.5 112 Evening Star 9200 21.6 18.6 116 23.5 21.4 110 Marquette 8760 5.4 -M * 6.7 -M * Sylvan Lake 8420 16.3 15.3 107 17.9 17.3 103 Sylvan Road 7120 9.8 8.9 110 13.7 13.5 101 Younts Peak 8350 13.2 11.3 117 11.0 12.2 90 ----- ----- Basin Index (%) 110 104 POWDER RIVER Bear Trap Meadow 8200 7.8 4.1 190 8.0 5.9 136 Cloud Peak Reservoir 9860 10.6 10.0 106 10.4 9.2 113 Grave Springs 8550 8.7 6.2 140 9.1 7.5 121 Hansen Sawmill 8360 5.6 4.4 127 6.7 5.8 116 Middle Powder 7760 10.3 7.5 137 10.4 8.3 125 Powder River Pass 9480 10.1 7.6 133 10.1 9.2 110 Soldier Park 8720 4.2 -M * 6.8 -M * ----- ----- Basin Index (%) 133 119 TONGUE RIVER Big Goose 7990 7.0 6.0 117 8.1 7.6 107 Bone Springs Div 9350 13.6 11.3 120 11.5 11.2 103 Burgess Junction 7880 9.0 7.8 115 10.1 8.6 117 Dome Lake 8880 9.7 8.2 118 7.7 9.6 80 Little Goose 8870 8.2 -M * 6.5 -M * Sucker Creek 8880 10.9 8.5 128 10.1 10.0 101 Tie Creek 6870 7.2 4.2 171 10.7 8.0 134 ----- ----- Basin Index (%) 125 106 BELLE FOURCHE Blind Park 6890 6.2 6.0 103 6.7 9.0 74 Cole Canyon 5910 1.8 4.8 38 -M 6.8 * ----- ----- Basin Index (%) 74 74 CHEYENNE RIVER BASIN Blind Park 6890 6.2 6.0 103 6.7 9.0 74 North Rapid Creek 6130 5.9 5.7 104 6.7 7.2 93 ----- ----- Basin Index (%) 103 83 UPPER N. PLATTE Arapaho Ridge 10960 18.0 15.7 115 17.4 16.9 103 Blackhall Mtn 9820 23.8 -M * 23.2 -M * Columbine 9160 26.0 18.8 138 24.0 19.5 123 Divide Peak 8880 17.5 15.1 116 18.2 16.3 112 Joe Wright 10120 16.8 15.6 108 21.3 19.1 112 Laprele Creek 8375 9.7 7.3 133 10.0 9.0 111 Med Bow 10500 36.2 -M * 29.4 -M * Never Summer 10280 15.9 15.2 105 11.8 -M * North French Creek 10130 27.8 20.0 139 26.8 20.2 133 Old Battle 10000 25.2 23.2 109 23.4 27.0 87 Rawah 9020 10.7 8.0 134 12.0 10.3 117 Sage Creek Basin 7850 13.2 10.4 127 10.7 11.4 94 Sand Lake 10050 23.8 20.1 118 21.9 18.2 120 South Brush Creek 8440 11.2 9.5 118 11.3 11.2 101 Tower 10500 37.3 35.0 107 32.1 30.6 105 Webber Springs 9250 17.6 17.9 98 19.1 20.3 94 Whiskey Park 8950 28.1 20.3 138 26.7 21.6 124 Willow Creek Pass 9540 10.9 9.1 120 10.3 9.9 104 Zirkel 9340 23.7 22.3 106 25.8 22.5 115 ----- ----- Basin Index (%) 118 110 SWEETWATER Deer Park 9700 9.5 10.4 91 8.8 14.5 61 Larsen Creek 9000 -M 9.0 * 5.9 -M * South Pass 9040 8.6 10.8 80 7.8 12.9 60 ----- ----- Basin Index (%) 85 61 LOWER N. PLATTE Casper Mtn. 7900 13.0 9.6 135 8.9 10.6 84 Laprele Creek 8375 9.7 7.3 133 10.0 9.0 111 Reno Hill 8400 13.2 9.4 140 13.7 10.6 129 Windy Peak 7900 7.9 5.5 144 6.7 7.5 89 ----- ----- Basin Index (%) 138 104 LARAMIE RIVER Brooklyn Lake 10240 22.5 14.5 155 21.7 15.4 141 Cinnabar Park 9574 20.2 16.4 123 21.0 19.1 110 Crow Creek 8330 7.1 6.6 108 9.0 7.6 118 Deadman Hill 10220 14.6 12.1 121 12.8 12.2 105 Rawah 9020 10.7 8.0 134 12.0 10.3 117 Roach 9700 11.7 12.1 97 11.7 14.1 83 Windy Peak 7900 7.9 5.5 144 6.7 7.5 89 ----- ----- Basin Index (%) 126 110 S. PLATTE Black Mountain 8920 8.8 -M * 10.5 -M * Crow Creek 8330 7.1 6.6 108 9.0 7.6 118 Deadman Hill 10220 14.6 12.1 121 12.8 12.2 105 ----- ----- Basin Index (%) 116 110 LITTLE SNAKE RIVER Battle Mountain 7440 12.4 9.3 133 12.5 11.7 107 Divide Peak 8880 17.5 15.1 116 18.2 16.3 112 Elk River 8700 17.8 14.5 123 14.9 15.4 97 Little Snake River 8915 23.1 19.2 120 27.4 24.3 113 Old Battle 10000 25.2 23.2 109 23.4 27.0 87 Sage Creek Basin 7850 13.2 10.4 127 10.7 11.4 94 Sandstone RS 8150 14.3 10.3 139 13.4 14.6 92 Whiskey Park 8950 28.1 20.3 138 26.7 21.6 124 ----- ----- Basin Index (%) 124 103 UPPER GREEN RIVER Big Sandy Opening 9080 7.2 9.5 76 6.1 10.0 61 Blind Bull Sum 8650 20.6 17.3 119 12.1 15.4 79 East Rim Divide 7930 9.9 7.6 130 8.0 9.2 87 Elkhart Park G.S. 9400 8.5 9.0 94 8.1 10.0 81 Gros Ventre Summit 8750 8.7 9.4 93 8.6 9.7 89 Gunsight Pass 9820 10.1 10.1 100 10.1 10.4 97 Indian Creek 9425 18.4 17.8 103 13.1 17.1 77 Kendall R.S. 7740 8.5 9.5 89 8.5 11.2 76 Loomis Park 8240 11.7 11.3 104 14.6 13.5 108 New Fork Lake 8340 8.7 7.8 112 -M 8.4 * Pocket Creek 9360 -M -M * 6.1 -M * Snider Basin 8060 11.3 9.2 123 11.8 11.1 106 Spring Creek Divide 9000 21.4 17.5 122 20.3 18.6 109 Triple Peak 8500 21.7 16.2 134 21.6 19.4 111 ----- ----- Basin Index (%) 110 92 LOWER GREEN RIVER Blacks Fork Jct 8869 6.3 -M * 9.6 -M * Buck Pasture 9632 14.3 -M * 14.0 -M * EF Blacks Fork GS 9360 11.8 -M * 7.7 -M * Hams Fork 7840 10.4 8.8 118 9.5 8.8 108 Hewinta 9500 8.5 7.4 115 11.7 10.4 112 Hickerson Park 9122 8.5 5.5 155 9.0 7.3 123 Hole-in-Rock 9168 8.7 5.2 167 8.7 6.8 128 Indian Creek 9425 18.4 17.8 103 13.1 17.1 77 Kelley R.S. 8180 12.5 11.3 111 13.3 14.0 95 Spirit Lk 10235 13.1 -M * 14.0 -M * Steel Creek Park 10158 12.0 10.9 110 14.4 11.9 121 ----- ----- Basin Index (%) 118 104 UPPER BEAR RIVER Bear River RS 8777 7.3 -M * 8.6 -M * Bug Lake 7987 16.2 14.1 115 14.8 15.0 99 Burts Miller Ranch 8000 5.3 -M * 5.7 -M * Chalk Creek #1 9171 15.9 17.3 92 14.9 18.8 79 Hayden Fork 9130 13.1 11.5 114 16.3 15.7 104 Kelley R.S. 8180 12.5 11.3 111 13.3 14.0 95 Lily Lake 9133 9.4 9.8 96 9.6 12.7 76 Monte Cristo 8932 22.6 19.8 114 20.1 19.7 102 Salt River Summit 7640 12.3 10.2 121 12.7 12.9 98 Spring Creek Divide 9000 21.4 17.5 122 20.3 18.6 109 ----- ----- Basin Index (%) 111 96 ----------------------------------------------------------------------------- -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.