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 MONDAY: FEBRUARY 17 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.0 12.8 102 13.4 15.7 85 Black Bear 8170 25.8 27.3 95 24.3 28.2 86 Blind Bull Sum 8650 20.5 16.3 126 12.1 14.6 83 Cottonwood Creek 7670 22.1 15.0 147 23.3 17.9 130 East Rim Divide 7930 9.9 7.4 134 7.9 8.6 92 Grand Targhee 9260 32.9 26.9 122 22.9 23.4 98 Granite Creek 6770 13.2 12.6 105 12.6 15.2 83 Grassy Lake 7265 25.3 24.3 104 24.9 27.2 92 Gros Ventre Summit 8750 8.8 9.0 98 8.6 9.2 93 Gunsight Pass 9820 10.1 9.6 105 10.1 10.1 100 Lewis Lake Divide 7850 19.8 23.5 84 22.9 26.4 87 Phillips Bench 8200 22.3 18.1 123 21.6 20.7 104 Salt River Summit 7640 12.3 9.5 129 12.5 12.2 102 Snake River Station 6920 13.5 13.3 102 15.9 17.3 92 Spring Creek Divide 9000 21.2 16.5 128 20.2 17.6 115 Thumb Divide 7980 11.0 10.9 101 11.1 13.5 82 Togwotee Pass 9580 21.0 16.6 127 20.0 17.8 112 Two Ocean Plateau 9240 22.3 19.7 113 17.3 19.7 88 Willow Creek 8080 28.1 19.8 142 27.9 24.4 114 Younts Peak 8350 13.4 11.0 122 10.7 11.7 91 ----- ----- Basin Index (%) 114 97 MADISON-GALLATIN Black Bear 8170 25.8 27.3 95 24.3 28.2 86 Canyon 7870 10.7 9.5 113 10.9 12.0 91 Madison Plateau 7750 16.1 15.9 101 11.7 19.2 61 West Yellowstone 6700 8.7 7.8 112 7.4 10.8 69 Whiskey Creek 6800 11.5 10.9 106 13.2 14.9 89 ----- ----- Basin Index (%) 102 79 YELLOWSTONE Beartooth Lake 9360 17.1 15.5 110 15.8 14.5 109 Burnt Mtn 5880 4.9 3.6 136 9.7 8.8 110 Canyon 7870 10.7 9.5 113 10.9 12.0 91 Cole Creek 7850 13.7 8.9 154 10.2 8.4 121 Evening Star 9200 21.3 17.8 120 23.0 20.4 113 Fisher Creek 9100 24.2 23.6 103 24.7 23.4 106 Northeast Entrance 7350 8.6 7.5 115 9.6 9.3 103 Parker Peak 9400 19.8 14.3 138 17.4 12.8 136 Sylvan Lake 8420 16.0 14.4 111 17.8 16.6 107 Thumb Divide 7980 11.0 10.9 101 11.1 13.5 82 Two Ocean Plateau 9240 22.3 19.7 113 17.3 19.7 88 White Mill 8700 19.8 16.4 121 16.2 17.5 93 Wolverine 7650 11.2 8.0 140 10.7 9.2 116 Younts Peak 8350 13.4 11.0 122 10.7 11.7 91 ----- ----- Basin Index (%) 118 104 WIND RIVER Burroughs Creek 8750 9.4 -M * 10.8 -M * Castle Creek 8400 4.2 -M * 4.9 -M * Cold Springs 9630 5.9 5.2 113 5.5 6.8 81 Deer Park 9700 9.3 9.9 94 8.2 14.1 58 Hobbs Park 10100 9.6 8.7 110 8.1 8.7 93 Kirwin 9550 8.6 6.2 139 7.3 8.1 90 Little Warm 9370 8.7 7.4 118 7.1 9.0 79 Owl Creek 8975 4.8 3.4 141 5.1 3.9 131 South Pass 9040 8.4 10.3 82 7.3 12.3 59 St. Lawrence Alt 8620 4.0 4.6 87 5.2 5.9 88 Togwotee Pass 9580 21.0 16.6 127 20.0 17.8 112 Townsend Creek 8700 6.9 5.9 117 7.0 8.0 88 ----- ----- Basin Index (%) 112 85 BIGHORN BASIN Bald Mtn. 9380 17.1 13.2 130 13.4 11.9 113 Bear Trap Meadow 8200 -M 3.8 * 7.6 5.7 133 Bone Springs Div 9350 13.5 10.9 124 11.1 10.7 104 Grave Springs 8550 8.6 5.7 151 -M 7.2 * Kirwin 9550 8.6 6.2 139 7.3 8.1 90 Marquette 8760 5.4 -M * 6.7 -M * Middle Powder 7760 10.2 7.2 142 10.3 8.1 127 Owl Creek 8975 4.8 3.4 141 5.1 3.9 131 Powder River Pass 9480 10.0 7.3 137 9.8 8.8 111 Shell Creek 9580 11.6 10.2 114 11.3 9.7 116 Timber Creek 7950 4.8 3.1 155 5.4 4.9 110 ----- ----- Basin Index (%) 133 113 SHOSHONE RIVER Blackwater 9780 16.9 15.7 108 16.7 14.9 112 Evening Star 9200 21.3 17.8 120 23.0 20.4 113 Marquette 8760 5.4 -M * 6.7 -M * Sylvan Lake 8420 16.0 14.4 111 17.8 16.6 107 Sylvan Road 7120 9.7 8.7 111 13.5 13.1 103 Younts Peak 8350 13.4 11.0 122 10.7 11.7 91 ----- ----- Basin Index (%) 114 107 POWDER RIVER Bear Trap Meadow 8200 -M 3.8 * 7.6 5.7 133 Cloud Peak Reservoir 9860 10.6 9.7 109 9.9 8.8 112 Grave Springs 8550 8.6 5.7 151 -M 7.2 * Hansen Sawmill 8360 5.6 4.3 130 6.6 5.5 120 Middle Powder 7760 10.2 7.2 142 10.3 8.1 127 Powder River Pass 9480 10.0 7.3 137 9.8 8.8 111 Soldier Park 8720 4.0 -M * 6.7 -M * ----- ----- Basin Index (%) 132 120 TONGUE RIVER Big Goose 7990 6.7 5.7 118 7.7 7.3 105 Bone Springs Div 9350 13.5 10.9 124 11.1 10.7 104 Burgess Junction 7880 8.9 7.5 119 10.0 8.3 120 Dome Lake 8880 9.4 7.9 119 7.3 9.2 79 Little Goose 8870 8.0 -M * 6.5 -M * Sucker Creek 8880 10.9 8.1 135 9.6 9.7 99 Tie Creek 6870 7.1 3.9 182 10.6 7.8 136 ----- ----- Basin Index (%) 128 106 BELLE FOURCHE Blind Park 6890 6.3 5.7 111 6.7 8.7 77 Cole Canyon 5910 2.3 4.5 51 -M 6.6 * ----- ----- Basin Index (%) 84 77 CHEYENNE RIVER BASIN Blind Park 6890 6.3 5.7 111 6.7 8.7 77 North Rapid Creek 6130 5.7 5.4 106 6.7 7.1 94 ----- ----- Basin Index (%) 108 85 UPPER N. PLATTE Arapaho Ridge 10960 17.8 14.9 119 17.2 16.2 106 Blackhall Mtn 9820 23.5 -M * 23.0 -M * Columbine 9160 25.0 17.5 143 23.5 18.7 126 Divide Peak 8880 17.4 14.1 123 18.1 15.6 116 Joe Wright 10120 16.1 14.8 109 20.7 18.1 114 Laprele Creek 8375 9.5 6.7 142 9.6 8.5 113 Med Bow 10500 35.9 -M * 29.4 -M * Never Summer 10280 15.5 14.2 109 11.5 -M * North French Creek 10130 27.9 19.3 145 26.6 19.1 139 Old Battle 10000 25.1 22.2 113 23.2 25.7 90 Rawah 9020 10.5 7.5 140 11.9 9.9 120 Sage Creek Basin 7850 13.1 9.8 134 10.7 11.0 97 Sand Lake 10050 23.6 18.7 126 21.8 17.2 127 South Brush Creek 8440 11.2 8.6 130 11.1 10.6 105 Tower 10500 36.2 32.8 110 31.2 29.1 107 Webber Springs 9250 17.5 16.8 104 19.0 19.3 98 Whiskey Park 8950 27.7 19.3 144 26.6 20.6 129 Willow Creek Pass 9540 10.6 8.6 123 10.0 9.4 106 Zirkel 9340 23.2 21.0 110 25.4 21.6 118 ----- ----- Basin Index (%) 123 113 SWEETWATER Deer Park 9700 9.3 9.9 94 8.2 14.1 58 Larsen Creek 9000 -M 8.6 * 5.9 -M * South Pass 9040 8.4 10.3 82 7.3 12.3 59 ----- ----- Basin Index (%) 88 59 LOWER N. PLATTE Casper Mtn. 7900 12.7 9.0 141 8.6 10.2 84 Laprele Creek 8375 9.5 6.7 142 9.6 8.5 113 Reno Hill 8400 13.1 8.9 147 13.1 10.2 128 Windy Peak 7900 7.7 5.2 148 6.3 7.2 88 ----- ----- Basin Index (%) 144 104 LARAMIE RIVER Brooklyn Lake 10240 22.2 13.9 160 21.3 14.6 146 Cinnabar Park 9574 20.0 16.0 125 20.6 18.3 113 Crow Creek 8330 7.1 6.4 111 8.9 7.2 124 Deadman Hill 10220 14.4 11.5 125 12.6 11.6 109 Rawah 9020 10.5 7.5 140 11.9 9.9 120 Roach 9700 11.6 11.6 100 11.2 13.4 84 Windy Peak 7900 7.7 5.2 148 6.3 7.2 88 ----- ----- Basin Index (%) 130 113 S. PLATTE Black Mountain 8920 8.8 -M * 10.4 -M * Crow Creek 8330 7.1 6.4 111 8.9 7.2 124 Deadman Hill 10220 14.4 11.5 125 12.6 11.6 109 ----- ----- Basin Index (%) 120 114 LITTLE SNAKE RIVER Battle Mountain 7440 12.4 8.7 143 12.2 11.1 110 Divide Peak 8880 17.4 14.1 123 18.1 15.6 116 Elk River 8700 17.6 13.8 128 14.5 14.6 99 Little Snake River 8915 23.2 18.4 126 27.4 23.3 118 Old Battle 10000 25.1 22.2 113 23.2 25.7 90 Sage Creek Basin 7850 13.1 9.8 134 10.7 11.0 97 Sandstone RS 8150 14.4 9.9 145 13.2 13.8 96 Whiskey Park 8950 27.7 19.3 144 26.6 20.6 129 ----- ----- Basin Index (%) 130 108 UPPER GREEN RIVER Big Sandy Opening 9080 7.2 9.0 80 6.1 9.4 65 Blind Bull Sum 8650 20.5 16.3 126 12.1 14.6 83 East Rim Divide 7930 9.9 7.4 134 7.9 8.6 92 Elkhart Park G.S. 9400 8.5 8.6 99 8.0 9.5 84 Gros Ventre Summit 8750 8.8 9.0 98 8.6 9.2 93 Gunsight Pass 9820 10.1 9.6 105 10.1 10.1 100 Indian Creek 9425 18.3 16.6 110 13.0 16.1 81 Kendall R.S. 7740 8.5 9.0 94 8.6 10.5 82 Loomis Park 8240 11.7 10.6 110 14.1 12.7 111 New Fork Lake 8340 8.8 7.5 117 6.5 7.9 82 Pocket Creek 9360 -M -M * 5.9 -M * Snider Basin 8060 11.4 9.0 127 11.8 10.5 112 Spring Creek Divide 9000 21.2 16.5 128 20.2 17.6 115 Triple Peak 8500 21.6 15.5 139 21.5 18.2 118 ----- ----- Basin Index (%) 115 96 LOWER GREEN RIVER Blacks Fork Jct 8869 6.3 -M * 9.5 -M * Buck Pasture 9632 14.4 -M * 13.9 -M * EF Blacks Fork GS 9360 11.9 -M * 7.8 -M * Hams Fork 7840 10.5 8.4 125 9.2 8.3 111 Hewinta 9500 8.6 7.0 123 11.7 9.9 118 Hickerson Park 9122 8.5 5.1 167 8.9 6.9 129 Hole-in-Rock 9168 8.6 4.8 179 8.6 6.5 132 Indian Creek 9425 18.3 16.6 110 13.0 16.1 81 Kelley R.S. 8180 12.7 10.7 119 13.3 13.2 101 Spirit Lk 10235 13.2 -M * 13.9 -M * Steel Creek Park 10158 11.8 10.3 115 14.3 11.2 128 ----- ----- Basin Index (%) 126 110 UPPER BEAR RIVER Bear River RS 8777 7.2 -M * 8.4 -M * Bug Lake 7987 16.2 13.3 122 14.7 14.1 104 Burts Miller Ranch 8000 5.4 -M * 5.6 -M * Chalk Creek #1 9171 15.8 16.1 98 14.1 17.8 79 Hayden Fork 9130 13.0 11.0 118 16.2 14.9 109 Kelley R.S. 8180 12.7 10.7 119 13.3 13.2 101 Lily Lake 9133 9.3 9.0 103 9.5 12.1 79 Monte Cristo 8932 22.6 18.9 120 19.1 18.6 103 Salt River Summit 7640 12.3 9.5 129 12.5 12.2 102 Spring Creek Divide 9000 21.2 16.5 128 20.2 17.6 115 ----- ----- Basin Index (%) 117 99 ----------------------------------------------------------------------------- -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.