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 THURSDAY: FEBRUARY 20 , 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 13.0 99 13.3 16.3 82 Black Bear 8170 25.8 27.8 93 24.2 29.0 83 Blind Bull Sum 8650 20.1 16.9 119 12.0 15.1 79 Cottonwood Creek 7670 22.1 15.5 143 23.1 18.4 126 East Rim Divide 7930 9.7 7.5 129 7.7 8.9 87 Grand Targhee 9260 32.8 27.6 119 22.7 23.7 96 Granite Creek 6770 13.1 13.0 101 -M 15.6 * Grassy Lake 7265 25.0 24.7 101 24.7 27.9 89 Gros Ventre Summit 8750 8.3 9.2 90 8.4 9.5 88 Gunsight Pass 9820 9.9 9.9 100 9.9 10.2 97 Lewis Lake Divide 7850 19.4 24.2 80 22.7 27.3 83 Phillips Bench 8200 22.2 18.6 119 21.5 21.3 101 Salt River Summit 7640 12.1 9.8 123 12.3 12.6 98 Snake River Station 6920 13.4 13.6 99 15.6 17.7 88 Spring Creek Divide 9000 21.0 17.0 124 20.0 18.2 110 Thumb Divide 7980 10.7 11.1 96 10.9 13.8 79 Togwotee Pass 9580 21.1 16.8 126 20.0 18.3 109 Two Ocean Plateau 9240 22.1 20.2 109 17.2 20.4 84 Willow Creek 8080 28.1 20.5 137 27.8 25.1 111 Younts Peak 8350 13.0 11.1 117 10.4 12.0 87 ----- ----- Basin Index (%) 111 94 MADISON-GALLATIN Black Bear 8170 25.8 27.8 93 24.2 29.0 83 Canyon 7870 10.5 9.8 107 10.6 12.4 85 Madison Plateau 7750 16.0 16.5 97 -M 19.8 * West Yellowstone 6700 8.6 8.1 106 7.4 11.0 67 Whiskey Creek 6800 11.4 11.3 101 12.9 15.3 84 ----- ----- Basin Index (%) 98 81 YELLOWSTONE Beartooth Lake 9360 17.2 15.7 110 15.8 14.9 106 Burnt Mtn 5880 4.9 3.8 129 9.1 8.9 102 Canyon 7870 10.5 9.8 107 10.6 12.4 85 Cole Creek 7850 13.9 8.9 156 10.2 8.6 119 Evening Star 9200 21.4 18.3 117 23.3 20.9 111 Fisher Creek 9100 24.2 24.4 99 24.7 24.0 103 Northeast Entrance 7350 8.7 7.5 116 9.6 9.4 102 Parker Peak 9400 19.7 14.7 134 17.3 13.2 131 Sylvan Lake 8420 16.3 14.9 109 17.7 17.0 104 Thumb Divide 7980 10.7 11.1 96 10.9 13.8 79 Two Ocean Plateau 9240 22.1 20.2 109 17.2 20.4 84 White Mill 8700 19.8 17.0 116 16.1 18.0 89 Wolverine 7650 11.1 8.2 135 10.5 9.4 112 Younts Peak 8350 13.0 11.1 117 10.4 12.0 87 ----- ----- Basin Index (%) 115 100 WIND RIVER Burroughs Creek 8750 9.2 -M * 10.4 -M * Castle Creek 8400 4.0 -M * 4.8 -M * Cold Springs 9630 5.7 5.3 108 5.5 7.0 79 Deer Park 9700 9.4 10.1 93 8.2 14.3 57 Hobbs Park 10100 9.4 9.0 104 7.9 8.9 89 Kirwin 9550 8.5 6.4 133 7.1 8.3 86 Little Warm 9370 8.6 7.6 113 6.9 9.3 74 Owl Creek 8975 4.7 3.5 134 5.0 4.0 125 South Pass 9040 8.4 10.6 79 7.5 12.7 59 St. Lawrence Alt 8620 3.6 4.8 75 5.1 6.1 84 Togwotee Pass 9580 21.1 16.8 126 20.0 18.3 109 Townsend Creek 8700 6.7 6.0 112 6.9 8.2 84 ----- ----- Basin Index (%) 107 82 BIGHORN BASIN Bald Mtn. 9380 17.2 13.7 126 12.7 12.2 104 Bear Trap Meadow 8200 7.4 3.9 190 7.7 5.8 133 Bone Springs Div 9350 13.6 11.2 121 11.0 11.0 100 Grave Springs 8550 8.5 5.9 144 8.9 7.4 120 Kirwin 9550 8.5 6.4 133 7.1 8.3 86 Marquette 8760 5.3 -M * 6.6 -M * Middle Powder 7760 10.4 7.4 141 10.2 8.2 124 Owl Creek 8975 4.7 3.5 134 5.0 4.0 125 Powder River Pass 9480 10.1 7.4 136 9.8 9.0 109 Shell Creek 9580 11.5 10.5 110 11.2 9.9 113 Timber Creek 7950 4.8 3.1 155 5.3 4.9 108 ----- ----- Basin Index (%) 132 110 SHOSHONE RIVER Blackwater 9780 16.9 16.2 104 17.1 15.2 112 Evening Star 9200 21.4 18.3 117 23.3 20.9 111 Marquette 8760 5.3 -M * 6.6 -M * Sylvan Lake 8420 16.3 14.9 109 17.7 17.0 104 Sylvan Road 7120 9.7 8.8 110 13.0 13.3 98 Younts Peak 8350 13.0 11.1 117 10.4 12.0 87 ----- ----- Basin Index (%) 112 104 POWDER RIVER Bear Trap Meadow 8200 7.4 3.9 190 7.7 5.8 133 Cloud Peak Reservoir 9860 10.3 9.9 104 9.5 9.0 106 Grave Springs 8550 8.5 5.9 144 8.9 7.4 120 Hansen Sawmill 8360 5.5 4.4 125 6.6 5.7 116 Middle Powder 7760 10.4 7.4 141 10.2 8.2 124 Powder River Pass 9480 10.1 7.4 136 9.8 9.0 109 Soldier Park 8720 3.9 -M * 6.6 -M * ----- ----- Basin Index (%) 134 117 TONGUE RIVER Big Goose 7990 6.8 5.9 115 8.2 7.5 109 Bone Springs Div 9350 13.6 11.2 121 11.0 11.0 100 Burgess Junction 7880 8.9 7.6 117 9.8 8.5 115 Dome Lake 8880 9.2 8.0 115 7.4 9.4 79 Little Goose 8870 8.2 -M * 6.4 -M * Sucker Creek 8880 10.8 8.2 132 9.7 9.9 98 Tie Creek 6870 7.0 4.1 171 10.6 7.9 134 ----- ----- Basin Index (%) 125 105 BELLE FOURCHE Blind Park 6890 6.2 5.8 107 6.7 8.9 75 Cole Canyon 5910 2.1 4.7 45 -M 6.8 * ----- ----- Basin Index (%) 79 75 CHEYENNE RIVER BASIN Blind Park 6890 6.2 5.8 107 6.7 8.9 75 North Rapid Creek 6130 5.7 5.6 102 6.9 7.2 96 ----- ----- Basin Index (%) 104 84 UPPER N. PLATTE Arapaho Ridge 10960 17.7 15.3 116 17.0 16.6 102 Blackhall Mtn 9820 23.4 -M * 22.9 -M * Columbine 9160 25.3 18.2 139 -M 19.1 * Divide Peak 8880 17.0 14.6 116 18.1 16.0 113 Joe Wright 10120 16.6 15.3 108 21.2 18.6 114 Laprele Creek 8375 9.6 7.0 137 9.8 8.8 111 Med Bow 10500 36.0 -M * 29.3 -M * Never Summer 10280 16.0 14.7 109 11.5 -M * North French Creek 10130 27.7 19.6 141 26.8 19.8 135 Old Battle 10000 25.0 22.8 110 23.0 26.4 87 Rawah 9020 10.3 7.7 134 11.7 10.1 116 Sage Creek Basin 7850 12.8 10.2 125 10.5 11.3 93 Sand Lake 10050 23.4 19.4 121 21.3 17.8 120 South Brush Creek 8440 11.0 9.1 121 11.1 10.9 102 Tower 10500 37.1 34.0 109 31.3 29.9 105 Webber Springs 9250 17.3 17.4 99 18.6 19.9 93 Whiskey Park 8950 27.6 19.8 139 26.6 21.1 126 Willow Creek Pass 9540 10.8 8.9 121 10.0 9.7 103 Zirkel 9340 23.2 21.7 107 -M 22.2 * ----- ----- Basin Index (%) 119 108 SWEETWATER Deer Park 9700 9.4 10.1 93 8.2 14.3 57 Larsen Creek 9000 -M 8.8 * 5.6 -M * South Pass 9040 8.4 10.6 79 7.5 12.7 59 ----- ----- Basin Index (%) 86 58 LOWER N. PLATTE Casper Mtn. 7900 13.0 9.4 138 8.8 10.4 85 Laprele Creek 8375 9.6 7.0 137 9.8 8.8 111 Reno Hill 8400 13.0 9.2 141 13.3 10.5 127 Windy Peak 7900 7.5 5.4 139 6.1 7.4 82 ----- ----- Basin Index (%) 139 102 LARAMIE RIVER Brooklyn Lake 10240 22.2 14.3 155 21.5 15.0 143 Cinnabar Park 9574 19.9 16.2 123 20.5 18.9 108 Crow Creek 8330 6.9 6.6 105 8.7 7.4 118 Deadman Hill 10220 14.5 11.8 123 12.6 11.9 106 Rawah 9020 10.3 7.7 134 11.7 10.1 116 Roach 9700 11.4 11.9 96 10.9 13.8 79 Windy Peak 7900 7.5 5.4 139 6.1 7.4 82 ----- ----- Basin Index (%) 125 109 S. PLATTE Black Mountain 8920 8.5 -M * 10.4 -M * Crow Creek 8330 6.9 6.6 105 8.7 7.4 118 Deadman Hill 10220 14.5 11.8 123 12.6 11.9 106 ----- ----- Basin Index (%) 116 110 LITTLE SNAKE RIVER Battle Mountain 7440 11.8 8.9 133 11.9 11.4 104 Divide Peak 8880 17.0 14.6 116 18.1 16.0 113 Elk River 8700 17.4 14.1 123 14.8 15.1 98 Little Snake River 8915 22.8 18.8 121 26.9 24.1 112 Old Battle 10000 25.0 22.8 110 23.0 26.4 87 Sage Creek Basin 7850 12.8 10.2 125 10.5 11.3 93 Sandstone RS 8150 13.9 10.2 136 13.2 14.2 93 Whiskey Park 8950 27.6 19.8 139 26.6 21.1 126 ----- ----- Basin Index (%) 124 104 UPPER GREEN RIVER Big Sandy Opening 9080 7.0 9.3 75 5.9 9.8 60 Blind Bull Sum 8650 20.1 16.9 119 12.0 15.1 79 East Rim Divide 7930 9.7 7.5 129 7.7 8.9 87 Elkhart Park G.S. 9400 8.2 8.8 93 7.7 9.8 79 Gros Ventre Summit 8750 8.3 9.2 90 8.4 9.5 88 Gunsight Pass 9820 9.9 9.9 100 9.9 10.2 97 Indian Creek 9425 18.1 17.2 105 12.9 16.7 77 Kendall R.S. 7740 8.3 9.2 90 8.3 10.9 76 Loomis Park 8240 11.6 10.9 106 14.2 13.2 108 New Fork Lake 8340 8.6 7.6 113 6.4 8.2 78 Pocket Creek 9360 -M -M * 5.8 -M * Snider Basin 8060 11.1 9.1 122 11.5 10.8 106 Spring Creek Divide 9000 21.0 17.0 124 20.0 18.2 110 Triple Peak 8500 21.4 15.8 135 21.2 18.8 113 ----- ----- Basin Index (%) 110 91 LOWER GREEN RIVER Blacks Fork Jct 8869 5.8 -M * 9.5 -M * Buck Pasture 9632 14.1 -M * 14.1 -M * EF Blacks Fork GS 9360 11.6 -M * 7.6 -M * Hams Fork 7840 10.3 8.6 120 9.1 8.6 106 Hewinta 9500 8.7 7.2 121 11.1 10.1 110 Hickerson Park 9122 8.2 5.3 155 8.9 7.1 125 Hole-in-Rock 9168 8.2 5.0 164 8.2 6.7 122 Indian Creek 9425 18.1 17.2 105 12.9 16.7 77 Kelley R.S. 8180 12.2 11.0 111 12.9 13.7 94 Spirit Lk 10235 12.8 -M * 13.6 -M * Steel Creek Park 10158 12.2 10.6 115 14.3 11.6 123 ----- ----- Basin Index (%) 120 104 UPPER BEAR RIVER Bear River RS 8777 7.2 -M * 8.4 -M * Bug Lake 7987 16.0 13.7 117 14.6 14.6 100 Burts Miller Ranch 8000 5.3 -M * 5.3 -M * Chalk Creek #1 9171 15.7 16.8 93 14.7 18.4 80 Hayden Fork 9130 13.0 11.3 115 16.2 15.4 105 Kelley R.S. 8180 12.2 11.0 111 12.9 13.7 94 Lily Lake 9133 9.2 9.4 98 9.7 12.5 78 Monte Cristo 8932 22.5 19.4 116 19.9 19.3 103 Salt River Summit 7640 12.1 9.8 123 12.3 12.6 98 Spring Creek Divide 9000 21.0 17.0 124 20.0 18.2 110 ----- ----- Basin Index (%) 112 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.