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 16 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 12.4 12.7 98 12.9 15.6 83 Black Bear 8170 25.3 27.2 93 23.8 27.9 85 Blind Bull Sum 8650 19.4 16.1 120 11.5 14.5 79 Cottonwood Creek 7670 21.1 14.8 143 22.2 17.7 125 East Rim Divide 7930 9.5 7.3 130 7.5 8.5 88 Grand Targhee 9260 30.8 26.6 116 21.6 23.3 93 Granite Creek 6770 12.4 12.4 100 12.0 15.1 79 Grassy Lake 7265 24.1 24.1 100 24.1 27.0 89 Gros Ventre Summit 8750 8.4 8.9 94 8.3 9.1 91 Gunsight Pass 9820 9.8 9.5 103 9.8 10.0 98 Lewis Lake Divide 7850 18.8 23.2 81 21.9 26.1 84 Phillips Bench 8200 21.4 17.9 120 20.8 20.5 101 Salt River Summit 7640 11.9 9.3 128 12.1 12.1 100 Snake River Station 6920 12.8 13.1 98 15.1 17.2 88 Spring Creek Divide 9000 20.4 16.4 124 19.5 17.4 112 Thumb Divide 7980 10.8 10.7 101 10.9 13.3 82 Togwotee Pass 9580 19.8 16.5 120 18.8 17.7 106 Two Ocean Plateau 9240 21.7 19.5 111 17.0 19.6 87 Willow Creek 8080 27.0 19.6 138 27.0 24.2 112 Younts Peak 8350 13.0 10.9 119 10.6 11.6 91 ----- ----- Basin Index (%) 111 94 MADISON-GALLATIN Black Bear 8170 25.3 27.2 93 23.8 27.9 85 Canyon 7870 10.5 9.4 112 10.7 12.0 89 Madison Plateau 7750 15.8 15.7 101 11.5 19.1 60 West Yellowstone 6700 8.6 7.7 112 7.3 10.7 68 Whiskey Creek 6800 11.4 10.8 106 13.0 14.8 88 ----- ----- Basin Index (%) 101 78 YELLOWSTONE Beartooth Lake 9360 16.8 15.4 109 15.4 14.4 107 Burnt Mtn 5880 4.8 3.5 137 9.7 8.7 111 Canyon 7870 10.5 9.4 112 10.7 12.0 89 Cole Creek 7850 13.7 8.9 154 10.2 8.4 121 Evening Star 9200 20.5 17.7 116 22.1 20.2 109 Fisher Creek 9100 23.8 23.3 102 24.3 23.2 105 Northeast Entrance 7350 8.4 7.4 114 9.4 9.2 102 Parker Peak 9400 19.4 14.1 138 17.2 12.7 135 Sylvan Lake 8420 15.6 14.2 110 17.4 16.4 106 Thumb Divide 7980 10.8 10.7 101 10.9 13.3 82 Two Ocean Plateau 9240 21.7 19.5 111 17.0 19.6 87 White Mill 8700 19.4 16.3 119 15.8 17.3 91 Wolverine 7650 10.8 7.9 137 10.2 9.1 112 Younts Peak 8350 13.0 10.9 119 10.6 11.6 91 ----- ----- Basin Index (%) 117 102 WIND RIVER Burroughs Creek 8750 8.6 -M * 9.8 -M * Castle Creek 8400 3.8 -M * 4.5 -M * Cold Springs 9630 5.7 5.1 112 5.4 6.8 79 Deer Park 9700 9.1 9.8 93 8.1 14.0 58 Hobbs Park 10100 9.3 8.6 108 8.0 8.6 93 Kirwin 9550 8.4 6.2 135 7.2 8.0 90 Little Warm 9370 8.3 7.3 114 6.7 9.0 74 Owl Creek 8975 4.8 3.3 145 5.0 3.9 128 South Pass 9040 8.2 10.2 80 7.3 12.2 60 St. Lawrence Alt 8620 3.8 4.6 83 5.2 5.9 88 Togwotee Pass 9580 19.8 16.5 120 18.8 17.7 106 Townsend Creek 8700 6.8 5.8 117 7.0 7.9 89 ----- ----- Basin Index (%) 109 84 BIGHORN BASIN Bald Mtn. 9380 16.7 13.0 128 12.8 11.8 108 Bear Trap Meadow 8200 -M 3.8 * 7.5 5.6 134 Bone Springs Div 9350 13.2 10.8 122 11.0 10.6 104 Grave Springs 8550 8.4 5.6 150 8.8 7.2 122 Kirwin 9550 8.4 6.2 135 7.2 8.0 90 Marquette 8760 5.3 -M * 6.6 -M * Middle Powder 7760 9.9 7.1 139 10.0 8.0 125 Owl Creek 8975 4.8 3.3 145 5.0 3.9 128 Powder River Pass 9480 9.7 7.2 135 9.5 8.7 109 Shell Creek 9580 11.2 10.1 111 10.9 9.7 112 Timber Creek 7950 4.9 3.1 158 5.4 4.8 112 ----- ----- Basin Index (%) 131 113 SHOSHONE RIVER Blackwater 9780 16.3 15.6 104 16.2 14.7 110 Evening Star 9200 20.5 17.7 116 22.1 20.2 109 Marquette 8760 5.3 -M * 6.6 -M * Sylvan Lake 8420 15.6 14.2 110 17.4 16.4 106 Sylvan Road 7120 9.4 8.7 108 13.2 13.0 102 Younts Peak 8350 13.0 10.9 119 10.6 11.6 91 ----- ----- Basin Index (%) 111 105 POWDER RIVER Bear Trap Meadow 8200 -M 3.8 * 7.5 5.6 134 Cloud Peak Reservoir 9860 10.3 9.6 107 9.7 8.7 111 Grave Springs 8550 8.4 5.6 150 8.8 7.2 122 Hansen Sawmill 8360 5.4 4.3 126 6.4 5.5 116 Middle Powder 7760 9.9 7.1 139 10.0 8.0 125 Powder River Pass 9480 9.7 7.2 135 9.5 8.7 109 Soldier Park 8720 3.9 -M * 6.4 -M * ----- ----- Basin Index (%) 129 119 TONGUE RIVER Big Goose 7990 6.5 5.7 114 7.8 7.3 107 Bone Springs Div 9350 13.2 10.8 122 11.0 10.6 104 Burgess Junction 7880 8.8 7.4 119 9.8 8.2 120 Dome Lake 8880 9.1 7.8 117 7.1 9.2 77 Little Goose 8870 7.7 -M * 6.1 -M * Sucker Creek 8880 10.7 8.0 134 9.5 9.6 99 Tie Creek 6870 7.0 3.9 179 10.4 7.8 133 ----- ----- Basin Index (%) 127 106 BELLE FOURCHE Blind Park 6890 6.2 5.6 111 6.7 8.5 79 Cole Canyon 5910 2.3 4.5 51 -M 6.5 * ----- ----- Basin Index (%) 84 79 CHEYENNE RIVER BASIN Blind Park 6890 6.2 5.6 111 6.7 8.5 79 North Rapid Creek 6130 5.7 5.3 108 6.7 7.0 96 ----- ----- Basin Index (%) 109 86 UPPER N. PLATTE Arapaho Ridge 10960 16.7 14.7 114 16.3 16.1 101 Blackhall Mtn 9820 21.9 -M * 21.6 -M * Columbine 9160 23.5 17.3 136 22.2 18.5 120 Divide Peak 8880 16.6 14.0 119 17.2 15.4 112 Joe Wright 10120 15.0 14.6 103 19.7 18.0 109 Laprele Creek 8375 9.2 6.6 139 9.3 8.4 111 Med Bow 10500 33.8 -M * 27.3 -M * Never Summer 10280 14.9 14.1 106 11.0 -M * North French Creek 10130 26.5 19.1 139 25.3 19.0 133 Old Battle 10000 23.9 22.0 109 21.8 25.5 85 Rawah 9020 10.2 7.4 138 11.6 9.9 117 Sage Creek Basin 7850 12.7 9.6 132 10.3 10.9 94 Sand Lake 10050 22.4 18.5 121 20.7 17.0 122 South Brush Creek 8440 10.6 8.4 126 10.7 10.6 101 Tower 10500 34.0 32.4 105 29.7 28.8 103 Webber Springs 9250 16.6 16.6 100 18.1 19.1 95 Whiskey Park 8950 25.9 19.1 136 24.9 20.4 122 Willow Creek Pass 9540 10.0 8.5 118 9.4 9.3 101 Zirkel 9340 21.9 20.8 105 24.2 21.3 114 ----- ----- Basin Index (%) 118 109 SWEETWATER Deer Park 9700 9.1 9.8 93 8.1 14.0 58 Larsen Creek 9000 -M 8.5 * 5.7 -M * South Pass 9040 8.2 10.2 80 7.3 12.2 60 ----- ----- Basin Index (%) 86 59 LOWER N. PLATTE Casper Mtn. 7900 12.8 8.8 145 8.7 10.1 86 Laprele Creek 8375 9.2 6.6 139 9.3 8.4 111 Reno Hill 8400 12.6 8.8 143 12.7 10.1 126 Windy Peak 7900 7.3 5.1 143 6.0 7.1 85 ----- ----- Basin Index (%) 143 103 LARAMIE RIVER Brooklyn Lake 10240 20.5 13.8 149 19.7 14.5 136 Cinnabar Park 9574 18.8 15.8 119 20.0 18.1 110 Crow Creek 8330 7.0 6.3 111 8.8 7.1 124 Deadman Hill 10220 13.8 11.4 121 12.1 11.5 105 Rawah 9020 10.2 7.4 138 11.6 9.9 117 Roach 9700 11.3 11.5 98 11.0 13.3 83 Windy Peak 7900 7.3 5.1 143 6.0 7.1 85 ----- ----- Basin Index (%) 125 109 S. PLATTE Black Mountain 8920 8.6 -M * 10.3 -M * Crow Creek 8330 7.0 6.3 111 8.8 7.1 124 Deadman Hill 10220 13.8 11.4 121 12.1 11.5 105 ----- ----- Basin Index (%) 118 112 LITTLE SNAKE RIVER Battle Mountain 7440 11.7 8.6 136 11.7 11.0 106 Divide Peak 8880 16.6 14.0 119 17.2 15.4 112 Elk River 8700 16.6 13.7 121 13.7 14.5 94 Little Snake River 8915 21.6 18.2 119 26.0 23.1 113 Old Battle 10000 23.9 22.0 109 21.8 25.5 85 Sage Creek Basin 7850 12.7 9.6 132 10.3 10.9 94 Sandstone RS 8150 13.6 9.8 139 12.5 13.6 92 Whiskey Park 8950 25.9 19.1 136 24.9 20.4 122 ----- ----- Basin Index (%) 124 103 UPPER GREEN RIVER Big Sandy Opening 9080 7.0 9.0 78 6.0 9.3 65 Blind Bull Sum 8650 19.4 16.1 120 11.5 14.5 79 East Rim Divide 7930 9.5 7.3 130 7.5 8.5 88 Elkhart Park G.S. 9400 8.2 8.5 96 7.7 9.4 82 Gros Ventre Summit 8750 8.4 8.9 94 8.3 9.1 91 Gunsight Pass 9820 9.8 9.5 103 9.8 10.0 98 Indian Creek 9425 17.6 16.5 107 12.6 16.0 79 Kendall R.S. 7740 8.0 8.9 90 8.0 10.4 77 Loomis Park 8240 11.1 10.5 106 13.6 12.6 108 New Fork Lake 8340 8.3 7.5 111 6.3 7.8 81 Pocket Creek 9360 -M -M * 5.8 -M * Snider Basin 8060 10.9 8.9 122 11.3 10.4 109 Spring Creek Divide 9000 20.4 16.4 124 19.5 17.4 112 Triple Peak 8500 20.6 15.4 134 20.6 18.0 114 ----- ----- Basin Index (%) 111 93 LOWER GREEN RIVER Blacks Fork Jct 8869 6.0 -M * 9.2 -M * Buck Pasture 9632 13.9 -M * 13.6 -M * EF Blacks Fork GS 9360 11.6 -M * 7.6 -M * Hams Fork 7840 10.1 8.3 122 9.0 8.2 110 Hewinta 9500 8.3 6.9 120 11.3 9.8 115 Hickerson Park 9122 8.4 5.0 168 8.9 6.9 129 Hole-in-Rock 9168 8.4 4.7 179 8.6 6.4 134 Indian Creek 9425 17.6 16.5 107 12.6 16.0 79 Kelley R.S. 8180 12.1 10.5 115 12.7 13.1 97 Spirit Lk 10235 13.0 -M * 13.8 -M * Steel Creek Park 10158 11.3 10.2 111 13.9 11.2 124 ----- ----- Basin Index (%) 123 108 UPPER BEAR RIVER Bear River RS 8777 6.9 -M * 8.2 -M * Bug Lake 7987 15.4 13.1 118 14.1 13.9 101 Burts Miller Ranch 8000 5.2 -M * 5.5 -M * Chalk Creek #1 9171 15.0 15.9 94 13.8 17.6 78 Hayden Fork 9130 12.3 10.8 114 15.5 14.8 105 Kelley R.S. 8180 12.1 10.5 115 12.7 13.1 97 Lily Lake 9133 8.8 8.9 99 9.2 12.0 77 Monte Cristo 8932 21.5 18.7 115 19.0 18.3 104 Salt River Summit 7640 11.9 9.3 128 12.1 12.1 100 Spring Creek Divide 9000 20.4 16.4 124 19.5 17.4 112 ----- ----- Basin Index (%) 113 97 ----------------------------------------------------------------------------- -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.