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 SATURDAY: FEBRUARY 29 , 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 13.4 99 13.7 17.2 80 Black Bear 8170 26.3 29.4 89 24.6 30.7 80 Blind Bull Sum 8650 20.9 17.7 118 12.2 15.9 77 Cottonwood Creek 7670 22.8 16.7 137 23.9 19.5 123 East Rim Divide 7930 10.1 8.0 126 8.1 9.5 85 Grand Targhee 9260 33.6 29.9 112 23.8 24.7 96 Granite Creek 6770 13.7 13.7 100 12.4 16.4 76 Grassy Lake 7265 25.7 26.0 99 25.8 29.4 88 Gros Ventre Summit 8750 9.0 9.6 94 9.0 10.0 90 Gunsight Pass 9820 10.4 10.5 99 10.4 10.8 96 Lewis Lake Divide 7850 20.1 25.1 80 23.2 28.7 81 Phillips Bench 8200 23.0 19.6 117 22.3 22.7 98 Salt River Summit 7640 12.7 10.6 120 12.9 13.4 96 Snake River Station 6920 13.9 14.1 99 16.2 18.6 87 Spring Creek Divide 9000 21.7 18.4 118 20.6 19.2 107 Thumb Divide 7980 11.4 12.2 93 11.4 14.6 78 Togwotee Pass 9580 21.9 17.6 124 20.9 19.3 108 Two Ocean Plateau 9240 23.0 21.5 107 18.6 21.6 86 Willow Creek 8080 29.1 22.2 131 28.5 26.8 106 Younts Peak 8350 14.0 11.6 121 11.6 12.6 92 ----- ----- Basin Index (%) 108 92 MADISON-GALLATIN Black Bear 8170 26.3 29.4 89 24.6 30.7 80 Canyon 7870 10.8 10.4 104 11.0 13.0 85 Madison Plateau 7750 16.3 17.8 92 14.0 21.1 66 West Yellowstone 6700 8.9 9.0 99 7.4 11.6 64 Whiskey Creek 6800 11.7 12.0 98 13.4 16.2 83 ----- ----- Basin Index (%) 94 76 YELLOWSTONE Beartooth Lake 9360 18.0 16.5 109 16.7 15.7 106 Burnt Mtn 5880 5.4 4.0 135 10.6 9.5 112 Canyon 7870 10.8 10.4 104 11.0 13.0 85 Cole Creek 7850 14.1 9.8 144 10.8 9.1 119 Evening Star 9200 22.3 19.0 117 24.1 22.0 110 Fisher Creek 9100 25.2 25.7 98 26.0 25.5 102 Northeast Entrance 7350 8.8 8.1 109 10.0 9.9 101 Parker Peak 9400 20.7 16.0 129 19.0 14.0 136 Sylvan Lake 8420 16.7 15.8 106 18.4 17.9 103 Thumb Divide 7980 11.4 12.2 93 11.4 14.6 78 Two Ocean Plateau 9240 23.0 21.5 107 18.6 21.6 86 White Mill 8700 20.6 18.2 113 17.0 18.9 90 Wolverine 7650 11.5 8.5 135 10.8 10.0 108 Younts Peak 8350 14.0 11.6 121 11.6 12.6 92 ----- ----- Basin Index (%) 113 101 WIND RIVER Burroughs Creek 8750 9.6 -M * 10.8 -M * Castle Creek 8400 4.2 -M * 4.9 -M * Cold Springs 9630 6.1 5.5 111 6.0 7.5 80 Deer Park 9700 9.6 10.8 89 8.9 15.2 59 Hobbs Park 10100 10.0 9.6 104 8.6 9.5 91 Kirwin 9550 8.9 7.0 127 7.7 8.7 89 Little Warm 9370 9.0 7.9 114 7.5 9.8 77 Owl Creek 8975 5.0 3.9 128 5.5 4.3 128 South Pass 9040 8.8 11.3 78 7.9 13.4 59 St. Lawrence Alt 8620 4.0 5.1 78 5.3 6.5 82 Togwotee Pass 9580 21.9 17.6 124 20.9 19.3 108 Townsend Creek 8700 7.2 6.4 112 7.4 8.6 86 ----- ----- Basin Index (%) 106 83 BIGHORN BASIN Bald Mtn. 9380 18.6 14.6 127 14.4 13.0 111 Bear Trap Meadow 8200 8.0 4.3 186 8.2 6.1 134 Bone Springs Div 9350 14.5 11.9 122 12.1 11.7 103 Grave Springs 8550 9.1 6.8 134 9.9 7.8 127 Kirwin 9550 8.9 7.0 127 7.7 8.7 89 Marquette 8760 5.8 -M * 7.1 -M * Middle Powder 7760 10.8 8.0 135 10.7 8.7 123 Owl Creek 8975 5.0 3.9 128 5.5 4.3 128 Powder River Pass 9480 10.5 7.9 133 10.5 9.6 109 Shell Creek 9580 12.6 11.5 110 11.9 10.6 112 Timber Creek 7950 5.0 3.5 143 5.6 5.2 108 ----- ----- Basin Index (%) 130 113 SHOSHONE RIVER Blackwater 9780 17.5 17.1 102 17.8 16.0 111 Evening Star 9200 22.3 19.0 117 24.1 22.0 110 Marquette 8760 5.8 -M * 7.1 -M * Sylvan Lake 8420 16.7 15.8 106 18.4 17.9 103 Sylvan Road 7120 10.4 9.4 111 -M 13.9 * Younts Peak 8350 14.0 11.6 121 11.6 12.6 92 ----- ----- Basin Index (%) 111 105 POWDER RIVER Bear Trap Meadow 8200 8.0 4.3 186 8.2 6.1 134 Cloud Peak Reservoir 9860 11.5 10.3 112 11.1 9.6 116 Grave Springs 8550 9.1 6.8 134 9.9 7.8 127 Hansen Sawmill 8360 5.8 4.6 126 6.9 6.1 113 Middle Powder 7760 10.8 8.0 135 10.7 8.7 123 Powder River Pass 9480 10.5 7.9 133 10.5 9.6 109 Soldier Park 8720 4.7 -M * 7.2 -M * ----- ----- Basin Index (%) 133 120 TONGUE RIVER Big Goose 7990 7.4 6.2 119 8.4 7.8 108 Bone Springs Div 9350 14.5 11.9 122 12.1 11.7 103 Burgess Junction 7880 9.8 8.2 120 10.8 8.9 121 Dome Lake 8880 10.6 8.6 123 8.1 9.9 82 Little Goose 8870 8.9 -M * 6.9 -M * Sucker Creek 8880 11.9 8.8 135 11.0 10.5 105 Tie Creek 6870 7.8 4.3 181 11.4 8.4 136 ----- ----- Basin Index (%) 129 108 BELLE FOURCHE Blind Park 6890 7.4 6.4 116 7.3 9.4 78 Cole Canyon 5910 2.0 5.0 40 -M 7.1 * ----- ----- Basin Index (%) 82 78 CHEYENNE RIVER BASIN Blind Park 6890 7.4 6.4 116 7.3 9.4 78 North Rapid Creek 6130 6.8 5.9 115 7.3 7.6 96 ----- ----- Basin Index (%) 115 86 UPPER N. PLATTE Arapaho Ridge 10960 18.7 16.6 113 18.1 17.6 103 Blackhall Mtn 9820 24.6 -M * 23.8 -M * Columbine 9160 27.5 19.7 140 25.0 20.3 123 Divide Peak 8880 17.8 15.7 113 18.3 16.7 110 Joe Wright 10120 18.1 16.5 110 22.5 19.8 114 Laprele Creek 8375 10.9 7.7 142 11.0 9.3 118 Med Bow 10500 37.6 -M * 30.4 -M * Never Summer 10280 16.7 16.1 104 12.3 -M * North French Creek 10130 29.4 21.0 140 28.1 21.0 134 Old Battle 10000 25.6 23.8 108 23.5 27.8 85 Rawah 9020 11.0 8.7 126 12.4 10.9 114 Sage Creek Basin 7850 13.5 10.6 127 10.8 11.7 92 Sand Lake 10050 24.6 21.1 117 22.7 18.8 121 South Brush Creek 8440 11.6 10.2 114 11.4 11.7 97 Tower 10500 39.2 36.0 109 32.8 31.7 103 Webber Springs 9250 18.1 18.6 97 19.5 21.0 93 Whiskey Park 8950 29.3 21.3 138 27.5 22.3 123 Willow Creek Pass 9540 11.2 9.4 119 10.5 10.3 102 Zirkel 9340 24.7 22.9 108 26.5 23.4 113 ----- ----- Basin Index (%) 118 109 SWEETWATER Deer Park 9700 9.6 10.8 89 8.9 15.2 59 Larsen Creek 9000 -M 9.5 * 6.0 -M * South Pass 9040 8.8 11.3 78 7.9 13.4 59 ----- ----- Basin Index (%) 83 59 LOWER N. PLATTE Casper Mtn. 7900 13.9 10.1 138 9.3 11.1 84 Laprele Creek 8375 10.9 7.7 142 11.0 9.3 118 Reno Hill 8400 14.4 9.9 145 14.7 11.0 134 Windy Peak 7900 8.7 5.7 153 7.2 7.8 92 ----- ----- Basin Index (%) 143 108 LARAMIE RIVER Brooklyn Lake 10240 23.3 14.9 156 22.4 16.0 140 Cinnabar Park 9574 20.9 17.0 123 22.5 19.7 114 Crow Creek 8330 7.2 6.7 107 9.2 7.7 119 Deadman Hill 10220 15.4 12.4 124 13.4 12.7 106 Rawah 9020 11.0 8.7 126 12.4 10.9 114 Roach 9700 12.4 12.4 100 12.2 14.6 84 Windy Peak 7900 8.7 5.7 153 7.2 7.8 92 ----- ----- Basin Index (%) 127 111 S. PLATTE Black Mountain 8920 9.0 -M * 10.8 -M * Crow Creek 8330 7.2 6.7 107 9.2 7.7 119 Deadman Hill 10220 15.4 12.4 124 13.4 12.7 106 ----- ----- Basin Index (%) 118 111 LITTLE SNAKE RIVER Battle Mountain 7440 12.4 9.8 127 12.5 12.1 103 Divide Peak 8880 17.8 15.7 113 18.3 16.7 110 Elk River 8700 18.4 15.3 120 15.5 15.9 97 Little Snake River 8915 23.7 19.7 120 27.9 24.9 112 Old Battle 10000 25.6 23.8 108 23.5 27.8 85 Sage Creek Basin 7850 13.5 10.6 127 10.8 11.7 92 Sandstone RS 8150 14.5 10.4 139 13.6 15.0 91 Whiskey Park 8950 29.3 21.3 138 27.5 22.3 123 ----- ----- Basin Index (%) 123 102 UPPER GREEN RIVER Big Sandy Opening 9080 7.4 10.0 74 6.3 10.4 61 Blind Bull Sum 8650 20.9 17.7 118 12.2 15.9 77 East Rim Divide 7930 10.1 8.0 126 8.1 9.5 85 Elkhart Park G.S. 9400 8.9 9.4 95 8.4 10.5 80 Gros Ventre Summit 8750 9.0 9.6 94 9.0 10.0 90 Gunsight Pass 9820 10.4 10.5 99 10.4 10.8 96 Indian Creek 9425 19.0 18.8 101 13.3 17.7 75 Kendall R.S. 7740 8.8 9.7 91 8.7 11.6 75 Loomis Park 8240 12.1 11.7 103 14.9 14.0 106 New Fork Lake 8340 9.0 8.2 110 -M 8.7 * Pocket Creek 9360 -M -M * 6.3 -M * Snider Basin 8060 11.7 9.5 123 12.2 11.5 106 Spring Creek Divide 9000 21.7 18.4 118 20.6 19.2 107 Triple Peak 8500 22.2 16.7 133 22.2 20.2 110 ----- ----- Basin Index (%) 108 91 LOWER GREEN RIVER Blacks Fork Jct 8869 6.5 -M * 9.8 -M * Buck Pasture 9632 14.8 -M * 14.4 -M * EF Blacks Fork GS 9360 12.1 -M * 7.8 -M * Hams Fork 7840 10.9 9.2 118 9.6 9.1 105 Hewinta 9500 8.7 7.9 110 11.8 10.8 109 Hickerson Park 9122 8.7 5.8 150 9.1 7.5 121 Hole-in-Rock 9168 8.8 5.5 160 8.7 7.1 123 Indian Creek 9425 19.0 18.8 101 13.3 17.7 75 Kelley R.S. 8180 12.9 12.1 107 13.7 14.5 94 Spirit Lk 10235 13.4 -M * 14.2 -M * Steel Creek Park 10158 13.8 11.5 120 14.7 12.4 119 ----- ----- Basin Index (%) 117 102 UPPER BEAR RIVER Bear River RS 8777 7.5 -M * 8.7 -M * Bug Lake 7987 16.1 14.7 110 14.9 15.4 97 Burts Miller Ranch 8000 5.2 -M * 5.7 -M * Chalk Creek #1 9171 16.1 18.2 88 15.0 19.4 77 Hayden Fork 9130 13.4 12.0 112 16.5 16.3 101 Kelley R.S. 8180 12.9 12.1 107 13.7 14.5 94 Lily Lake 9133 9.7 10.2 95 9.8 13.2 74 Monte Cristo 8932 22.9 20.8 110 20.2 20.5 99 Salt River Summit 7640 12.7 10.6 120 12.9 13.4 96 Spring Creek Divide 9000 21.7 18.4 118 20.6 19.2 107 ----- ----- Basin Index (%) 107 94 ----------------------------------------------------------------------------- -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.