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 27 , 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 13.3 99 13.7 17.1 80 Black Bear 8170 26.2 29.1 90 24.5 30.5 80 Blind Bull Sum 8650 20.8 17.6 118 12.2 15.8 77 Cottonwood Creek 7670 22.7 16.4 138 23.8 19.4 123 East Rim Divide 7930 10.1 7.9 128 8.1 9.5 85 Grand Targhee 9260 33.6 29.4 114 23.2 24.6 94 Granite Creek 6770 13.6 13.5 101 -M 16.4 * Grassy Lake 7265 25.7 25.7 100 25.7 29.2 88 Gros Ventre Summit 8750 8.9 9.5 94 8.9 10.0 89 Gunsight Pass 9820 10.4 10.4 100 10.4 10.7 97 Lewis Lake Divide 7850 19.9 25.1 79 23.2 28.5 81 Phillips Bench 8200 23.0 19.4 119 22.2 22.5 99 Salt River Summit 7640 12.5 10.4 120 12.7 13.3 95 Snake River Station 6920 13.8 14.0 99 16.2 18.5 88 Spring Creek Divide 9000 21.7 18.1 120 20.6 19.1 108 Thumb Divide 7980 11.2 11.9 94 11.4 14.5 79 Togwotee Pass 9580 21.9 17.5 125 20.9 19.2 109 Two Ocean Plateau 9240 23.0 21.4 107 17.9 21.5 83 Willow Creek 8080 28.9 22.0 131 28.4 26.6 107 Younts Peak 8350 14.0 11.5 122 11.6 12.5 93 ----- ----- Basin Index (%) 109 92 MADISON-GALLATIN Black Bear 8170 26.2 29.1 90 24.5 30.5 80 Canyon 7870 10.8 10.4 104 11.0 12.9 85 Madison Plateau 7750 16.2 17.6 92 14.0 21.0 67 West Yellowstone 6700 8.8 8.8 100 7.4 11.5 64 Whiskey Creek 6800 11.6 11.9 97 13.3 16.1 83 ----- ----- Basin Index (%) 95 76 YELLOWSTONE Beartooth Lake 9360 17.9 16.2 110 16.5 15.6 106 Burnt Mtn 5880 5.4 4.0 135 10.5 9.2 114 Canyon 7870 10.8 10.4 104 11.0 12.9 85 Cole Creek 7850 14.3 9.5 151 10.7 8.9 120 Evening Star 9200 22.1 18.9 117 23.9 21.9 109 Fisher Creek 9100 25.1 25.4 99 25.8 25.2 102 Northeast Entrance 7350 8.9 7.9 113 10.0 9.8 102 Parker Peak 9400 20.6 15.8 130 18.9 13.8 137 Sylvan Lake 8420 16.7 15.7 106 18.4 17.8 103 Thumb Divide 7980 11.2 11.9 94 11.4 14.5 79 Two Ocean Plateau 9240 23.0 21.4 107 17.9 21.5 83 White Mill 8700 20.5 18.0 114 16.8 18.8 89 Wolverine 7650 11.3 8.5 133 10.8 9.9 109 Younts Peak 8350 14.0 11.5 122 11.6 12.5 93 ----- ----- Basin Index (%) 114 101 WIND RIVER Burroughs Creek 8750 9.6 -M * 10.8 -M * Castle Creek 8400 4.3 -M * 5.0 -M * Cold Springs 9630 6.0 5.4 111 5.8 7.4 78 Deer Park 9700 9.6 10.8 89 8.8 15.0 59 Hobbs Park 10100 9.9 9.4 105 8.5 9.3 91 Kirwin 9550 8.9 6.8 131 7.7 8.7 89 Little Warm 9370 8.9 7.8 114 7.3 9.8 74 Owl Creek 8975 5.0 3.8 132 5.4 4.2 129 South Pass 9040 8.8 11.2 79 7.8 13.3 59 St. Lawrence Alt 8620 4.0 5.0 80 5.3 6.4 83 Togwotee Pass 9580 21.9 17.5 125 20.9 19.2 109 Townsend Creek 8700 7.1 6.3 113 7.3 8.5 86 ----- ----- Basin Index (%) 107 83 BIGHORN BASIN Bald Mtn. 9380 18.4 14.4 128 14.2 12.9 110 Bear Trap Meadow 8200 8.0 4.3 186 8.1 6.0 135 Bone Springs Div 9350 14.5 11.6 125 11.9 11.6 103 Grave Springs 8550 9.0 6.6 136 -M 7.7 * Kirwin 9550 8.9 6.8 131 7.7 8.7 89 Marquette 8760 5.7 -M * 7.0 -M * Middle Powder 7760 10.9 7.8 140 10.6 8.6 123 Owl Creek 8975 5.0 3.8 132 5.4 4.2 129 Powder River Pass 9480 10.5 7.8 135 10.4 9.4 111 Shell Creek 9580 12.4 11.3 110 11.9 10.4 114 Timber Creek 7950 5.0 3.3 152 5.6 5.1 110 ----- ----- Basin Index (%) 132 112 SHOSHONE RIVER Blackwater 9780 17.6 16.9 104 17.6 15.9 111 Evening Star 9200 22.1 18.9 117 23.9 21.9 109 Marquette 8760 5.7 -M * 7.0 -M * Sylvan Lake 8420 16.7 15.7 106 18.4 17.8 103 Sylvan Road 7120 10.2 9.2 111 -M 13.8 * Younts Peak 8350 14.0 11.5 122 11.6 12.5 93 ----- ----- Basin Index (%) 112 105 POWDER RIVER Bear Trap Meadow 8200 8.0 4.3 186 8.1 6.0 135 Cloud Peak Reservoir 9860 11.3 10.2 111 10.8 9.4 115 Grave Springs 8550 9.0 6.6 136 -M 7.7 * Hansen Sawmill 8360 5.8 4.6 126 6.9 5.9 117 Middle Powder 7760 10.9 7.8 140 10.6 8.6 123 Powder River Pass 9480 10.5 7.8 135 10.4 9.4 111 Soldier Park 8720 4.6 -M * 7.1 -M * ----- ----- Basin Index (%) 134 119 TONGUE RIVER Big Goose 7990 7.4 6.1 121 8.6 7.7 112 Bone Springs Div 9350 14.5 11.6 125 11.9 11.6 103 Burgess Junction 7880 9.7 8.1 120 10.8 8.9 121 Dome Lake 8880 10.5 8.5 124 8.0 9.8 82 Little Goose 8870 8.8 -M * 6.7 -M * Sucker Creek 8880 11.6 8.7 133 10.7 10.4 103 Tie Creek 6870 7.6 4.2 181 11.2 8.2 137 ----- ----- Basin Index (%) 130 108 BELLE FOURCHE Blind Park 6890 7.0 6.3 111 7.1 9.2 77 Cole Canyon 5910 2.1 5.0 42 -M 7.0 * ----- ----- Basin Index (%) 81 77 CHEYENNE RIVER BASIN Blind Park 6890 7.0 6.3 111 7.1 9.2 77 North Rapid Creek 6130 6.7 5.8 116 7.3 7.5 97 ----- ----- Basin Index (%) 113 86 UPPER N. PLATTE Arapaho Ridge 10960 18.7 16.3 115 18.0 17.4 103 Blackhall Mtn 9820 24.4 -M * 23.7 -M * Columbine 9160 27.3 19.4 141 24.8 20.2 123 Divide Peak 8880 17.6 15.4 114 18.3 16.6 110 Joe Wright 10120 18.0 16.2 111 22.4 19.7 114 Laprele Creek 8375 10.8 7.6 142 10.9 9.2 118 Med Bow 10500 37.4 -M * 30.0 -M * Never Summer 10280 16.6 15.9 104 12.3 -M * North French Creek 10130 29.1 20.8 140 27.8 20.8 134 Old Battle 10000 25.6 23.7 108 23.4 27.5 85 Rawah 9020 -M 8.5 * -M 10.7 * Sage Creek Basin 7850 13.3 10.5 127 10.8 11.5 94 Sand Lake 10050 24.4 20.8 117 22.5 18.6 121 South Brush Creek 8440 11.5 10.0 115 11.3 11.6 97 Tower 10500 39.0 35.7 109 32.7 31.5 104 Webber Springs 9250 17.9 18.4 97 19.4 20.9 93 Whiskey Park 8950 29.1 21.0 139 27.4 22.1 124 Willow Creek Pass 9540 11.2 9.3 120 10.5 10.2 103 Zirkel 9340 24.4 22.7 107 -M 23.2 * ----- ----- Basin Index (%) 118 109 SWEETWATER Deer Park 9700 9.6 10.8 89 8.8 15.0 59 Larsen Creek 9000 -M 9.3 * 6.0 -M * South Pass 9040 8.8 11.2 79 7.8 13.3 59 ----- ----- Basin Index (%) 84 59 LOWER N. PLATTE Casper Mtn. 7900 13.9 9.9 140 9.3 10.9 85 Laprele Creek 8375 10.8 7.6 142 10.9 9.2 118 Reno Hill 8400 14.3 9.7 147 14.5 10.9 133 Windy Peak 7900 8.6 5.7 151 7.0 7.7 91 ----- ----- Basin Index (%) 145 108 LARAMIE RIVER Brooklyn Lake 10240 23.2 14.7 158 22.2 15.8 141 Cinnabar Park 9574 20.6 16.8 123 22.2 19.4 114 Crow Creek 8330 7.2 6.6 109 9.4 7.7 122 Deadman Hill 10220 15.3 12.3 124 13.3 12.6 106 Rawah 9020 -M 8.5 * -M 10.7 * Roach 9700 12.1 12.2 99 11.9 14.5 82 Windy Peak 7900 8.6 5.7 151 7.0 7.7 91 ----- ----- Basin Index (%) 127 111 S. PLATTE Black Mountain 8920 9.0 -M * 10.8 -M * Crow Creek 8330 7.2 6.6 109 9.4 7.7 122 Deadman Hill 10220 15.3 12.3 124 13.3 12.6 106 ----- ----- Basin Index (%) 119 112 LITTLE SNAKE RIVER Battle Mountain 7440 12.4 9.7 128 12.5 12.0 104 Divide Peak 8880 17.6 15.4 114 18.3 16.6 110 Elk River 8700 18.4 15.0 123 15.4 15.8 97 Little Snake River 8915 23.7 19.6 121 28.0 24.7 113 Old Battle 10000 25.6 23.7 108 23.4 27.5 85 Sage Creek Basin 7850 13.3 10.5 127 10.8 11.5 94 Sandstone RS 8150 14.5 10.3 141 13.6 14.9 91 Whiskey Park 8950 29.1 21.0 139 27.4 22.1 124 ----- ----- Basin Index (%) 123 103 UPPER GREEN RIVER Big Sandy Opening 9080 7.4 9.8 76 6.3 10.4 61 Blind Bull Sum 8650 20.8 17.6 118 12.2 15.8 77 East Rim Divide 7930 10.1 7.9 128 8.1 9.5 85 Elkhart Park G.S. 9400 8.8 9.3 95 8.3 10.4 80 Gros Ventre Summit 8750 8.9 9.5 94 8.9 10.0 89 Gunsight Pass 9820 10.4 10.4 100 10.4 10.7 97 Indian Creek 9425 18.9 18.5 102 13.3 17.6 76 Kendall R.S. 7740 8.7 9.7 90 8.7 11.6 75 Loomis Park 8240 12.1 11.6 104 14.9 13.9 107 New Fork Lake 8340 8.9 8.1 110 -M 8.7 * Pocket Creek 9360 -M -M * 6.2 -M * Snider Basin 8060 11.8 9.4 126 12.2 11.4 107 Spring Creek Divide 9000 21.7 18.1 120 20.6 19.1 108 Triple Peak 8500 22.2 16.5 135 22.2 20.0 111 ----- ----- Basin Index (%) 109 91 LOWER GREEN RIVER Blacks Fork Jct 8869 6.4 -M * 9.8 -M * Buck Pasture 9632 14.9 -M * 14.4 -M * EF Blacks Fork GS 9360 12.1 -M * 7.9 -M * Hams Fork 7840 10.9 9.1 120 9.6 9.1 105 Hewinta 9500 8.8 7.7 114 11.9 10.7 111 Hickerson Park 9122 8.7 5.7 153 9.1 7.4 123 Hole-in-Rock 9168 8.8 5.5 160 8.8 7.0 126 Indian Creek 9425 18.9 18.5 102 13.3 17.6 76 Kelley R.S. 8180 12.8 11.9 108 13.6 14.4 94 Spirit Lk 10235 13.3 -M * 14.2 -M * Steel Creek Park 10158 13.8 11.3 122 14.7 12.2 120 ----- ----- Basin Index (%) 119 103 UPPER BEAR RIVER Bear River RS 8777 7.5 -M * 8.7 -M * Bug Lake 7987 16.2 14.5 112 14.8 15.3 97 Burts Miller Ranch 8000 5.2 -M * 5.7 -M * Chalk Creek #1 9171 16.0 17.9 89 14.9 19.2 78 Hayden Fork 9130 13.3 11.8 113 16.5 16.2 102 Kelley R.S. 8180 12.8 11.9 108 13.6 14.4 94 Lily Lake 9133 9.7 10.0 97 9.8 13.0 75 Monte Cristo 8932 22.8 20.4 112 20.1 20.3 99 Salt River Summit 7640 12.5 10.4 120 12.7 13.3 95 Spring Creek Divide 9000 21.7 18.1 120 20.6 19.1 108 ----- ----- Basin Index (%) 109 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.