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 TUESDAY: MARCH 10 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.9 13.8 101 14.5 18.2 80 Black Bear 8170 28.3 31.3 90 26.4 32.9 80 Blind Bull Sum 8650 21.9 19.3 113 13.0 16.8 77 Cottonwood Creek 7670 24.0 18.4 130 25.4 20.7 123 East Rim Divide 7930 10.8 9.4 115 8.5 10.2 83 Grand Targhee 9260 34.6 31.7 109 24.6 25.5 96 Granite Creek 6770 14.4 14.6 99 13.6 17.5 78 Grassy Lake 7265 27.3 27.5 99 27.3 31.1 88 Gros Ventre Summit 8750 9.9 10.8 92 9.7 10.8 90 Gunsight Pass 9820 10.9 11.5 95 10.9 11.6 94 Lewis Lake Divide 7850 21.0 26.3 80 24.4 30.6 80 Phillips Bench 8200 24.0 21.1 114 23.2 24.1 96 Salt River Summit 7640 13.3 11.1 120 13.3 14.2 94 Snake River Station 6920 14.3 15.1 95 17.0 19.6 87 Spring Creek Divide 9000 22.4 19.6 114 21.4 20.3 105 Thumb Divide 7980 12.5 13.1 95 12.2 15.7 78 Togwotee Pass 9580 23.1 19.4 119 22.2 20.6 108 Two Ocean Plateau 9240 24.6 22.9 107 19.9 23.2 86 Willow Creek 8080 31.4 24.1 130 30.4 28.3 107 Younts Peak 8350 15.0 12.3 122 12.0 13.4 90 ----- ----- Basin Index (%) 107 91 MADISON-GALLATIN Black Bear 8170 28.3 31.3 90 26.4 32.9 80 Canyon 7870 11.8 11.4 104 11.8 13.9 85 Madison Plateau 7750 17.6 19.2 92 15.5 22.7 68 West Yellowstone 6700 9.4 9.6 98 7.8 12.4 63 Whiskey Creek 6800 12.7 13.1 97 14.6 17.3 84 ----- ----- Basin Index (%) 94 77 YELLOWSTONE Beartooth Lake 9360 19.1 18.2 105 17.6 16.7 105 Burnt Mtn 5880 5.7 4.4 130 10.6 10.2 104 Canyon 7870 11.8 11.4 104 11.8 13.9 85 Cole Creek 7850 14.6 11.1 132 10.9 9.8 111 Evening Star 9200 23.4 20.8 112 25.3 23.3 109 Fisher Creek 9100 26.8 26.9 100 27.6 27.0 102 Northeast Entrance 7350 9.2 8.6 107 10.4 10.5 99 Parker Peak 9400 21.9 16.6 132 20.0 14.9 134 Sylvan Lake 8420 17.6 16.9 104 19.3 19.0 102 Thumb Divide 7980 12.5 13.1 95 12.2 15.7 78 Two Ocean Plateau 9240 24.6 22.9 107 19.9 23.2 86 White Mill 8700 21.6 19.1 113 17.8 20.2 88 Wolverine 7650 11.5 9.0 128 11.3 10.5 108 Younts Peak 8350 15.0 12.3 122 12.0 13.4 90 ----- ----- Basin Index (%) 111 99 WIND RIVER Burroughs Creek 8750 10.5 -M * 11.8 -M * Castle Creek 8400 4.6 -M * 5.3 -M * Cold Springs 9630 6.4 5.9 108 6.0 8.0 75 Deer Park 9700 10.5 12.0 88 9.4 16.2 58 Hobbs Park 10100 11.1 10.9 102 9.3 10.3 90 Kirwin 9550 9.5 7.7 123 8.3 9.4 88 Little Warm 9370 9.7 8.6 113 7.8 10.5 74 Owl Creek 8975 5.5 4.3 128 5.8 4.6 126 South Pass 9040 9.4 12.5 75 8.4 14.4 58 St. Lawrence Alt 8620 4.5 5.8 78 6.1 7.0 87 Togwotee Pass 9580 23.1 19.4 119 22.2 20.6 108 Townsend Creek 8700 7.9 7.4 107 8.0 9.3 86 ----- ----- Basin Index (%) 103 83 BIGHORN BASIN Bald Mtn. 9380 18.8 15.9 118 14.7 13.9 106 Bear Trap Meadow 8200 8.3 4.6 180 8.5 6.5 131 Bone Springs Div 9350 15.3 13.3 115 12.5 12.5 100 Grave Springs 8550 9.2 7.4 124 9.6 8.3 116 Kirwin 9550 9.5 7.7 123 8.3 9.4 88 Marquette 8760 5.9 -M * 7.4 -M * Middle Powder 7760 11.2 8.8 127 11.0 9.2 120 Owl Creek 8975 5.5 4.3 128 5.8 4.6 126 Powder River Pass 9480 11.1 8.4 132 11.3 10.1 112 Shell Creek 9580 13.2 12.2 108 12.6 11.1 114 Timber Creek 7950 5.1 4.0 128 5.9 5.5 107 ----- ----- Basin Index (%) 124 110 SHOSHONE RIVER Blackwater 9780 18.6 19.0 98 18.8 17.2 109 Evening Star 9200 23.4 20.8 112 25.3 23.3 109 Marquette 8760 5.9 -M * 7.4 -M * Sylvan Lake 8420 17.6 16.9 104 19.3 19.0 102 Sylvan Road 7120 10.4 10.0 104 -M 14.6 * Younts Peak 8350 15.0 12.3 122 12.0 13.4 90 ----- ----- Basin Index (%) 108 103 POWDER RIVER Bear Trap Meadow 8200 8.3 4.6 180 8.5 6.5 131 Cloud Peak Reservoir 9860 12.4 11.7 106 11.8 10.3 115 Grave Springs 8550 9.2 7.4 124 9.6 8.3 116 Hansen Sawmill 8360 6.3 5.1 124 7.3 6.5 112 Middle Powder 7760 11.2 8.8 127 11.0 9.2 120 Powder River Pass 9480 11.1 8.4 132 11.3 10.1 112 Soldier Park 8720 5.9 -M * 7.6 -M * ----- ----- Basin Index (%) 127 117 TONGUE RIVER Big Goose 7990 7.9 6.8 116 8.6 8.4 102 Bone Springs Div 9350 15.3 13.3 115 12.5 12.5 100 Burgess Junction 7880 10.0 9.2 109 11.1 9.6 116 Dome Lake 8880 11.9 9.3 128 8.3 10.6 78 Little Goose 8870 9.3 -M * 7.3 -M * Sucker Creek 8880 12.1 10.0 121 11.5 11.3 102 Tie Creek 6870 7.6 4.7 162 11.6 9.0 129 ----- ----- Basin Index (%) 122 104 BELLE FOURCHE Blind Park 6890 7.2 6.7 107 7.7 9.9 78 Cole Canyon 5910 -M 5.0 * -M 7.4 * ----- ----- Basin Index (%) 107 78 CHEYENNE RIVER BASIN Blind Park 6890 7.2 6.7 107 7.7 9.9 78 North Rapid Creek 6130 7.3 6.2 118 7.4 8.1 91 ----- ----- Basin Index (%) 112 84 UPPER N. PLATTE Arapaho Ridge 10960 19.4 17.6 110 18.7 18.7 100 Blackhall Mtn 9820 25.6 -M * 25.0 -M * Columbine 9160 28.7 21.0 137 25.8 21.6 119 Divide Peak 8880 18.5 16.9 109 19.1 17.9 107 Joe Wright 10120 18.7 18.3 102 23.1 21.3 108 Laprele Creek 8375 11.1 8.4 132 11.4 10.0 114 Med Bow 10500 38.9 -M * 30.7 -M * Never Summer 10280 16.8 16.9 99 12.5 -M * North French Creek 10130 30.0 22.8 132 28.6 22.3 128 Old Battle 10000 27.0 25.4 106 24.9 29.6 84 Rawah 9020 11.2 9.2 122 12.9 11.5 112 Sage Creek Basin 7850 14.1 11.5 123 11.0 12.3 89 Sand Lake 10050 25.7 22.4 115 23.6 20.2 117 South Brush Creek 8440 11.9 11.1 107 11.8 12.5 94 Tower 10500 40.2 38.0 106 36.5 33.8 108 Webber Springs 9250 19.1 20.1 95 20.9 22.4 93 Whiskey Park 8950 30.1 23.2 130 28.3 23.8 119 Willow Creek Pass 9540 11.1 10.3 108 10.7 10.9 98 Zirkel 9340 25.8 25.2 102 27.3 24.5 111 ----- ----- Basin Index (%) 113 107 SWEETWATER Deer Park 9700 10.5 12.0 88 9.4 16.2 58 Larsen Creek 9000 4.8 10.3 47 6.6 -M * South Pass 9040 9.4 12.5 75 8.4 14.4 58 ----- ----- Basin Index (%) 71 58 LOWER N. PLATTE Casper Mtn. 7900 14.1 11.4 124 9.5 11.8 81 Laprele Creek 8375 11.1 8.4 132 11.4 10.0 114 Reno Hill 8400 14.8 11.2 132 15.2 12.0 127 Windy Peak 7900 8.9 6.5 137 7.7 8.4 92 ----- ----- Basin Index (%) 130 104 LARAMIE RIVER Brooklyn Lake 10240 24.2 16.7 145 23.1 17.3 134 Cinnabar Park 9574 21.3 17.8 120 23.2 20.6 113 Crow Creek 8330 6.9 7.1 97 9.4 8.4 112 Deadman Hill 10220 15.7 12.9 122 13.8 13.8 100 Rawah 9020 11.2 9.2 122 12.9 11.5 112 Roach 9700 12.5 13.3 94 12.8 15.8 81 Windy Peak 7900 8.9 6.5 137 7.7 8.4 92 ----- ----- Basin Index (%) 121 107 S. PLATTE Black Mountain 8920 8.8 -M * 11.0 -M * Crow Creek 8330 6.9 7.1 97 9.4 8.4 112 Deadman Hill 10220 15.7 12.9 122 13.8 13.8 100 ----- ----- Basin Index (%) 113 105 LITTLE SNAKE RIVER Battle Mountain 7440 12.7 10.5 121 13.0 12.8 102 Divide Peak 8880 18.5 16.9 109 19.1 17.9 107 Elk River 8700 18.5 16.8 110 15.7 17.0 92 Little Snake River 8915 24.4 20.3 120 29.0 25.7 113 Old Battle 10000 27.0 25.4 106 24.9 29.6 84 Sage Creek Basin 7850 14.1 11.5 123 11.0 12.3 89 Sandstone RS 8150 14.9 11.8 126 14.0 15.9 88 Whiskey Park 8950 30.1 23.2 130 28.3 23.8 119 ----- ----- Basin Index (%) 117 100 UPPER GREEN RIVER Big Sandy Opening 9080 8.0 10.7 75 6.8 11.1 61 Blind Bull Sum 8650 21.9 19.3 113 13.0 16.8 77 East Rim Divide 7930 10.8 9.4 115 8.5 10.2 83 Elkhart Park G.S. 9400 9.4 10.0 94 9.1 11.1 82 Gros Ventre Summit 8750 9.9 10.8 92 9.7 10.8 90 Gunsight Pass 9820 10.9 11.5 95 10.9 11.6 94 Indian Creek 9425 19.4 20.2 96 13.9 18.9 74 Kendall R.S. 7740 9.2 10.5 88 9.3 12.5 74 Loomis Park 8240 12.8 12.6 102 15.5 14.9 104 New Fork Lake 8340 9.4 9.0 104 7.7 9.3 83 Pocket Creek 9360 -M -M * 6.7 -M * Snider Basin 8060 12.2 10.6 115 12.5 12.1 103 Spring Creek Divide 9000 22.4 19.6 114 21.4 20.3 105 Triple Peak 8500 23.4 18.5 126 23.5 21.5 109 ----- ----- Basin Index (%) 104 89 LOWER GREEN RIVER Blacks Fork Jct 8869 7.0 -M * 10.4 -M * Buck Pasture 9632 15.5 -M * 14.9 -M * EF Blacks Fork GS 9360 12.5 -M * -M -M * Hams Fork 7840 11.3 9.9 114 9.7 9.6 101 Hewinta 9500 9.6 8.6 112 12.6 11.5 110 Hickerson Park 9122 9.4 6.4 147 9.6 8.1 119 Hole-in-Rock 9168 9.4 6.0 157 9.3 7.6 122 Indian Creek 9425 19.4 20.2 96 13.9 18.9 74 Kelley R.S. 8180 13.5 12.6 107 14.1 15.4 92 Spirit Lk 10235 14.4 -M * 15.4 -M * Steel Creek Park 10158 14.6 12.5 117 15.4 13.2 117 ----- ----- Basin Index (%) 114 100 UPPER BEAR RIVER Bear River RS 8777 8.2 -M * 9.5 -M * Bug Lake 7987 16.8 16.0 105 15.4 16.3 94 Burts Miller Ranch 8000 6.1 -M * 6.2 -M * Chalk Creek #1 9171 17.5 19.8 88 16.1 20.7 78 Hayden Fork 9130 14.0 13.2 106 17.5 17.4 101 Kelley R.S. 8180 13.5 12.6 107 14.1 15.4 92 Lily Lake 9133 10.4 11.0 95 10.6 14.0 76 Monte Cristo 8932 24.1 22.8 106 21.2 21.7 98 Salt River Summit 7640 13.3 11.1 120 13.3 14.2 94 Spring Creek Divide 9000 22.4 19.6 114 21.4 20.3 105 ----- ----- Basin Index (%) 105 93 ----------------------------------------------------------------------------- -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.